JP2001028738A - Broadcast data transmitter/receiver, transmitter used for the same and its receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display at least only precise time and time signal on a reception side by setting real time when prescribed program is recorded to be recording time, scheduled time when a first term broadcast program is actually started to be broadcast, start time and time when the first half broadcast program is transmitted/received and the first term broadcast program is actually outputted on the reception side to be broadcast time. SOLUTION: Real time on a reception side is inputted from an input terminal 202. A time operation part 201 calculates conversion time from real time and transmission time information. When real time from the input terminal 202 is always inputted, real time is added to output from the time operation part 201 as it is and it, is outputted to an additional information data decoder part 120. When real time from the input terminal 202 is inputted only at necessary time such as the purchase time of a reception device, real time is calculated from transmission time information based on calculated conversion time and it is outputted to the additional information data decoder part 120. Thus, precise real time can be obtained from the receiver.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

In the present invention, one logical channel is constituted by a video signal, an audio signal, a data signal or a composite signal thereof, and at least one of the logical channels includes a data signal, a video signal and a data signal. And a broadcast signal composed of a data signal, a video signal and an audio signal, and further, a plurality of logical channels are combined into one physical channel, and broadcast data transmission is performed in units of the physical channel. The present invention relates to a broadcast data transmitting and receiving system having an apparatus and a broadcast data receiving apparatus that receives the apparatus, and particularly, in a transmission and reception between the broadcast data transmitting apparatus and the broadcast data receiving apparatus, including a processing time, a time difference of several seconds or more occurs, and Broadcast data transmission / reception system that requires accurate time output in a broadcast data receiving device, On the transmitter and the receiver.

[0002]

2. Description of the Related Art In recent years, digitalization of satellite broadcasting, cable television (hereinafter abbreviated as CATV), terrestrial television broadcasting, and the like has been studied. Currently MPEG (Moving Picture Experts Grou
p) 2 image compression technology and MPEG2-TS (-Transport Stre
am), a communication satellite (CS: Communication
Satellite digital broadcasting (hereinafter abbreviated as CS digital broadcasting) and CATV digital broadcasting (hereinafter abbreviated as CATV digital broadcasting) have also started in Japan, and CS digital broadcasting can receive about 100 logical channels of programs. It has become possible. In CS digital broadcasting, QPSK (Quadrature Phase Shift Keying) is used as a modulation method for one physical channel, and the transmission rate is 42.192 Mbps with a bandwidth of 27 MHz. On the other hand, CATV digital broadcasting uses 64QAM (64 Quadrature Amplitude Modulation) as a modulation method for one physical channel, and has a transmission rate of 31.644 Mbps with a bandwidth of 6 MHz. In the future, digital satellite broadcasting (hereinafter abbreviated as BS digital broadcasting) and terrestrial digital broadcasting by a broadcasting satellite (BS) will be realized in the same manner.

[0003] Terrestrial digital broadcasting has a provisional system, as shown in "Transmission equipment for digital terrestrial television broadcasting demonstration test", Vol.53, No. 2, pp187-193 (1999), Journal of the Institute of Image Information and Television Engineers. It was compiled in September 2010. According to this, terrestrial digital broadcasting is also considering services for mobiles, and in order to cope with this, OFDM (Orthogonal frequency
In addition to using vision multiplexing, interleaving is used in the frequency and time directions in order to cope with temporal burst-like errors that occur during mobile reception. In digital terrestrial broadcasting, the image compression technology is MPEG2 and the multiplexing system is MPEG2-TS.

Here, a schematic method of transmitting, multiplexing / demultiplexing, and synchronizing a system clock of MPEG2-TS will be described. About this, Hiroshi Fujiwara, supervised by ASCII Publishing Bureau, "Point-Making-style Latest MPEG Textbook" pp235-
Shown at 240.

[0005] The MPEG2-TS includes a PCR (Program Clock Referenc).
e: Program time reference value). In an MPEG system decoder including a video signal and an audio signal decoder, the STC (System Time Clock) value serving as the time reference is set to the value intended on the receiving side. Information for setting and calibration.

FIG. 14 shows a PLL (Phase Lock Loop) configuration for reproducing a system clock by PCR. 1401 is a PCR input terminal, 1402 is a subtractor, 1403 is a low-pass filter (hereinafter abbreviated as LPF), 1404 is a voltage controlled oscillator (hereinafter abbreviated as VCO), 1405 is a counter for STC, and 1406 is a clock output terminal It is.

[0007] First, an input is made from the input terminal 1401 first.
The PCR is loaded into the STC counter 1405. With this as an initial value, the PLL starts a closed loop operation. The difference between the PCR input from the input terminal 1401 and the output value of the STC counter 1405 is obtained by a subtractor 1402, and this difference is used as an error signal.
Then, unnecessary bands are removed and input to the VCO 1404 as a control signal. As a result, the VCO 1404 adjusts the oscillation frequency so that the error signal decreases, and outputs the reproduced system clock to the output terminal 1406. At this time, the STC is also played back based on the time.

Next, the reproduction timing of the video signal and the audio signal will be described. Information called a time stamp indicating when decoding and reproduction are performed is added to the video signal and the audio signal for each decoding and reproduction unit. ST
When C matches the time stamp, reproduction output is performed for each decoding / reproduction unit. Thus, the video signal and the audio signal can be output in time synchronization.

[0009] On the other hand, published by the Association of Radio Industries and Businesses, “Program Arrangement Information Standard ARIB STD Used for Digital Broadcasting”
-B10 version 1.1 ", revised version 1.1 in July 1998, the time and date table TDT (Time and D
ata Table) is defined. The TDT includes the current date and time in Japan Standard Time and the modified Julian date.

The above-described time stamp and TDT operate on the basis of the STC of the transmitting side (hereinafter abbreviated as the transmitting STC) on the transmitting side and the STC reproduced on the receiving side (abbreviated as the receiving STC) of the receiving side. ing. That is, it can be said that the output value of the STC counter 1405 is the reference clock on the receiving side. Also, the receiving STC is
PCR based on the transmitting STC (hereinafter abbreviated as transmitting STC)
Therefore, the reference clock on the transmission side and the reference clock on the reception side operate at the same frequency.

[0011]

The above prior art has the following problems. That is, the transmission side sends the
If there is some time lapse between the time corresponding to the TC and the time when the receiving STC is reproduced on the receiving side, there is a difference in the count value when comparing the count value of the STC of transmission and reception at the same real time That is. In other words, in the prior art, only relative time can be transmitted, and the reference clock on the transmission side and the reference clock on the reception side have the same frequency, but their phases (count values) differ between the transmission side and the reception side. Therefore, the TDT on the transmitting side (hereinafter, referred to as a transmitting apparatus time) and the TDT reproduced on the receiving side (hereinafter, referred to as a receiving apparatus time) at the same actual time are different.

[0012] The above period of time means the processing time when a live broadcast on the transmitting side is subjected to image compression such as MPEG2 using a real-time encoder, the compressed image decoding processing time on the receiving side, and the terrestrial digital broadcast. Digital signal processing such as interleaving time when time interleaving is performed as described above can be considered. In addition, in the case of CATV digital broadcasting, when CS digital broadcasting is received and retransmitted, re-modulation is performed by once applying error correction and adding a correction code again, or adding an encryption code for conditional access. Transmission may be considered, but in this case, the processing time of the digital signal may accumulate. The delay due to the processing time and the delay due to the transmission path time between transmission and reception are referred to herein as elapsed time.

A first object of the present invention is to show at least the actual time on the receiving side only at the time display and the time signal. FIG. 15 shows an example of time display on the television screen. 1501 is a television screen, and 1502 is a time display. TV broadcasts often show time display as shown in FIG. In the prior art, the time display is delayed from the actual time. Time signals are similarly delayed. In the present invention, this delay is eliminated and the actual time is indicated.

A second object of the present invention is to output a video signal and an audio signal on the receiving side in real time.

[0015]

Means for Solving the Problems Here, the time is defined as follows. The actual time when recording a broadcast program is the recording time, the broadcast start time is the time at which the broadcast program is scheduled to actually start, the previous broadcast program is transmitted and received, and the receiver actually downloads the previous broadcast program. The output time is defined as the broadcast time.

FIG. 16 shows the time relationship in the case described above. Here, the broadcast start time is set to “0”.
0 seconds, and the elapsed time is 03 seconds. At this time, consider the following three cases.

Case 1 is a case where the broadcast start time, the recording time, and the transmission device time are the same and are set to “00”. If there is almost no elapsed time, the broadcast time is "00" as in the case of the conventional analog broadcast, but since there is an elapsed time of "03" seconds, the broadcast time is "03" seconds. At this time,
The receiving device time is “57” seconds for the actual time “00” seconds, and conversely, the receiving time “00” seconds is for the actual time “03” seconds.

Case 2 is a case where the recording time is before the broadcast time and the time is the transmission device time “00”. In the example of FIG. 16, the recording time is set to "1"
The recording time is set to be “0” seconds earlier, the actual time is set to “50” seconds, and the transmission device time is set to “00”. If this shortened time ("10" seconds in the example of FIG. 16) is defined as a margin time, the margin time is set to a time longer than a conceivable elapsed time. In case 2, the broadcast time is “53” seconds, the receiving device time is “07” seconds at the real time “00” seconds, and the receiving time “00” seconds is the same as the real time “53” seconds. Become.

Case 3 is a case where the recording time is before the broadcast time and the actual time “00” seconds is the transmission device time “00”. In the example of FIG. 16, the recording time is earlier than the broadcast time by “10” seconds, and the time when the actual time is “50” seconds is defined as the recording time. In case 3, the broadcast time is “53” seconds, and the receiving device time is “57” in the actual time “00” seconds.
Secondly, the reception time “00” second is the actual time “03” second.

Based on the above, the following measures are taken to achieve the first object of the present invention.

One logical channel is composed of a video signal, an audio signal, a data signal, or a composite signal thereof. Time information indicating the current time is assigned to one of the logical channels. One is data signal and video signal, the other is data signal and audio signal,
Alternatively, one broadcast signal composed of a data signal, a video signal, and an audio signal is allocated, and further, a plurality of logical channels are combined into one physical channel, and a broadcast data transmitting device that transmits the physical channel unit and a broadcast data transmitting device. A broadcast data transmitting / receiving system having a broadcast data receiving device for receiving, the broadcast data transmitting device comprising: a transmission time information logical channel to which transmission time information indicating a reference time on the broadcast data transmitting device side is assigned; Wherein the broadcast data receiving apparatus converts the transmission time information into video or audio and uses the additional information data or the broadcast signal including broadcast time information data indicating a reference time of the broadcast signal. And a broadcast signal logical channel to which the transmission time information logical channel is assigned. Multiplexing means for multiplexing the broadcast signal logical channel and other logical channels according to a reference signal and outputting a multiplexed signal; reference signal generating means for outputting a reference signal for operating the multiplexing means; and Transmission signal output means for generating the transmission signal and outputting the transmission signal to a transmission path, wherein the broadcast data receiving apparatus receives the transmission signal, reproduces the multiplex signal, and reproduces the multiplex signal. Receiving demodulation means for outputting the transmission time information logical channel, the additional information data or the broadcast time information data, and the video signal or the audio signal from the reproduced multiplexed signal,
Separation means for outputting as reproduction transmission time information, reproduction additional information data or reproduction broadcast time information data, a reproduction video signal or a reproduction audio signal, and reproducing a reproduction reference signal synchronized with the reference signal from an output signal of the separation means. ,
Reference signal reproducing means for operating the separating means in accordance with the reproduction reference signal, and reception time information indicating a current time on the broadcast data receiving device side, or delay information indicating a difference between the reproduction transmission time information and the reception time information Time acquisition means for acquiring any one of the, the output signal of the time acquisition means and the reproduction transmission time information, or, from the output signal of the time acquisition means and the reproduction transmission time information and the reproduction broadcast time information data, An arithmetic means for calculating and obtaining the reception time information or broadcast delay information representing a difference between the broadcast time information data and the reception time information, and outputting the reception time information or the broadcast delay information; and the arithmetic means Using the output signal of the above and the reproduction additional information data to generate video time information or audio time information for converting the reception time information into video or audio Has a time output generation means that, a synthesizing means for synthesizing and outputting the said reproduced video signal and the video time information or the reproduced audio signal and the audio time information, from the time the output generating means.

The additional information data is, for example, the display position, display color, display font, display size, and display type of the time display 1502 in FIG. 15 (for example, whether to use a digital clock or an analog clock). , Etc. are correspondence information determined by the transmitting side and the receiving side. Alternatively, the additional information is, for example, correspondence information in which the transmitting side and the receiving side have determined the real time information to be a time signal, the length of the time signal, the type of the time signal, the pitch of the time signal, and the like.

Here, the reception time information represents the actual time on FIG. 16, and the reproduction transmission time information represents the receiving device time on FIG. Therefore, the delay information is the elapsed time “03” seconds in Case 1, and the delay information is “07” seconds, which is the difference between the margin time and the elapsed time in Case 2. This time may be checked once if the elapsed time does not change, and if this time is known, the reception time information, which is the actual time, can be naturally obtained. In case 3, information indicating that the margin time is “10” seconds is transmitted from the transmission side as broadcast time information, and the delay information is the elapsed time “03” seconds.
From this, "07" seconds, which is the difference between the margin time and the elapsed time, is calculated. This is broadcast delay information.

The time output generating means can use the accurate time regardless of the elapsed time by using the reception time information or the broadcast delay information which is the actual time on the receiving side.
By using the additional information, a configuration intended by the transmission side can be obtained.

The synthesizing means is a television screen as shown in FIG.
The time display 1502 is synthesized with 1501 or a time signal is added to the audio signal.

The following means are provided in order to achieve the first object of the present invention.

One logical channel is constituted by a video signal, an audio signal, a data signal, or a composite signal thereof. At least one of the logical channels includes a data signal and a video signal, a data signal and an audio signal, or a data signal and a data signal. One broadcast signal composed of a video signal and an audio signal is allocated, and further, a plurality of logical channels are combined into one physical channel, and a broadcast data transmitting apparatus transmitting the physical channel unit and broadcast data receiving the broadcast data are transmitted. In a broadcast data transmitting and receiving system having a receiving device,
The broadcast data transmitting device may further include, in the data signal, additional information data used when the broadcast time receiving device converts transmission time information into video or audio, or broadcast time information data representing a reference time of the broadcast signal. A multiplexing means for multiplexing the broadcast signal logical channel and other logical channels according to a reference signal and outputting a multiplexed signal, the multiplexing means having: Reference signal generating means for outputting a reference signal for operating the multiplexed signal, transmission signal output means for generating the physical channel from the multiplexed signal to generate a transmission signal, and outputting the transmission signal to a transmission path, and the broadcast data transmission device side Reference time information output means for outputting as reference time information representing the reference time of the reference time, and the reference signal and the reference time information are associated with each other. Allocating means for outputting the allocation information as the allocation information and the reference time information at the time of correspondence as the transmission time information; and transmitting the allocation information and the current time information to or from the transmission path. Output means for outputting and transmitting a time-allocated transmission signal to a channel, wherein the broadcast data receiving apparatus receives the transmission signal, reproduces the multiplexed signal, and outputs a reproduced multiplexed signal. Receiving demodulation means, and from the reproduced multiplexed signal,
The additional information data or the broadcast time information data;
Separating means for separating the video signal or the audio signal and outputting them as reproduction additional information data or reproduction broadcast time information data, a reproduction video signal or a reproduction audio signal, respectively, and synchronizing with the reference signal from the output signal of the separation means A reference signal reproducing means for reproducing the reproduced reproduction reference signal and operating the separating means based on the reproduction reference signal; a time allocation transmission signal receiving means for receiving the time allocation transmission signal; and an output of the time allocation transmission signal receiving means. Decoding means for reproducing the allocation information from the signal to obtain reproduction allocation information, and reproducing the reference time information and outputting the reference time information as reception time information when reproducing the reproduction; and the reproduction allocation information from the decoding means. And reproduces the transmission time information from the reproduction reference signal from the reference signal reproduction means and outputs it as reproduction transmission time information Time conversion means, the reception time information from the decoding means and the reproduction / transmission time information from the time conversion means, or the reception time information from the decoding means and the reproduction / transmission time information from the time conversion means And from the reproduced broadcast time information data, calculating and calculating broadcast delay information representing a difference between the broadcast time information data and the reception time information, and calculating means for outputting the reception time information or the broadcast delay information, A time output generating means for generating video time information or audio time information for converting the reception time information into video or audio using the output signal of the arithmetic means and the reproduction additional information data; and Synthesizing means for synthesizing the video time information and the reproduced video signal, or synthesizing the audio time information and the reproduced audio signal, and outputting the synthesized signal.

Assuming that the reference signal is, for example, the count value of the transmission STC, the allocation information is the reference time information and the transmission STC at that time.
Are associated with each other. The reference time information and the allocation information on the transmitting side can be almost ignored,
Using the same or another transmission path, and the time-assigned transmission signal output means and the time-assigned transmission signal reception means, transmit the reference time information on the transmission side to the reception time information of the real time by transmitting the signal to the reception side. Also, the receiving side can know the count value of the transmission STC at the real time from the allocation information.

The reproduction reference signal from the reference signal reproduction means on the demodulation side is, for example, the count value of the reception STC, which is affected by the elapsed time. From the difference between the count value of the reception STC and the transmission STC and the reference time information which is the reception time information of the actual time, the reproduction transmission time information, that is, the reception device time can be known.

The time output generating means can use the accurate time regardless of the elapsed time by using the reception time information or the broadcast delay information that is the actual time on the receiving side.
By using the additional information, a configuration intended by the transmission side can be obtained.

The synthesizing means is, as shown in FIG.
The time display 1502 is synthesized with 1501 or a time signal is added to the audio signal.

The following measures are taken to achieve the second object of the present invention.

One logical channel is composed of a video signal, an audio signal, a data signal, or a composite signal thereof. Time information indicating the current time is assigned to one of the logical channels. One is data signal and video signal, the other is data signal and audio signal,
Alternatively, one broadcast signal composed of a data signal, a video signal, and an audio signal is allocated, and further, a plurality of logical channels are combined into one physical channel, and a broadcast data transmitting device that transmits the physical channel unit and a broadcast data transmitting device. A broadcast data transmitting / receiving system having a broadcast data receiving device for receiving, the broadcast data transmitting device comprising: a transmission time information logical channel to which transmission time information indicating a reference time on the broadcast data transmitting device side is assigned; A broadcast signal logical channel to which one of the broadcast signals includes broadcast time information data representing the reference time of the broadcast signal, and the transmission time information logical channel, the broadcast signal logical channel, and the like. Multiplexing means for multiplexing logical channels according to a reference signal and outputting a multiplexed signal; Reference signal generating means for outputting a reference signal for operating a stage, and a transmission signal output means for generating the physical channel from the multiplexed signal to generate a transmission signal, and outputting the transmission signal to a transmission path, The broadcast data receiving apparatus receives the transmission signal, reproduces the multiplexed signal, and outputs a reproduced multiplexed signal. The reproduction time multiplexed signal includes a transmission time information logical channel, and a broadcast time information data. And separating means for separating the video signal or the audio signal and outputting as reproduction transmission time information, reproduction broadcast time information data, a reproduction video signal or a reproduction audio signal, respectively, and the reference signal from the output signal of the separation means. A reference signal reproducing unit that reproduces a reproduction reference signal synchronized with the reference signal and operates the separation unit based on the reproduction reference signal; Time acquisition means for acquiring one of reception time information indicating presence time, or delay information indicating a difference between the reproduction transmission time information and the reception time information, an output signal of the time acquisition means and the reproduction transmission time Information, or an output signal of the time acquisition means, the reproduction transmission time information, and the reproduction broadcast time information data, the reception time information, or a broadcast delay representing a difference between the broadcast time information data and the reception time information. Calculating means for calculating information, outputting the broadcast delay information, and delay means for delaying the reproduced video signal or the reproduced audio signal using the broadcast delay information that is an output signal of the arithmetic means, Having.

In case 2 and case 3 in FIG. 16, the broadcast time is earlier than the broadcast start time. The delay means delays the video signal and the audio signal by the time obtained by the broadcast delay information, and outputs the video signal and the audio signal on the receiving side in real time.

In order to achieve the second object of the present invention, the following measures are taken.

One logical channel is composed of a video signal, an audio signal, a data signal, or a composite signal thereof. At least one of the logical channels includes a data signal and a video signal, a data signal and an audio signal, or a data signal. One broadcast signal composed of a video signal and an audio signal is allocated, and further, a plurality of logical channels are combined into one physical channel, and a broadcast data transmitting apparatus transmitting the physical channel unit and broadcast data receiving the broadcast data are transmitted. In a broadcast data transmitting and receiving system having a receiving device,
The broadcast data transmitting apparatus has a broadcast signal logical channel to which one of the broadcast signals is assigned, wherein the data signal includes broadcast time information data representing a reference time of the broadcast signal. Multiplexing means for multiplexing the other logical channels according to the reference signal and outputting a multiplexed signal; reference signal generating means for outputting a reference signal for operating the multiplexing means; and generating the physical channel from the multiplexed signal and transmitting the multiplexed signal. Transmission signal output means for outputting the transmission signal to a transmission path, reference time information output means for outputting as reference time information indicating a reference time on the broadcast data transmitting device side, the reference signal and the reference time information An assignment that outputs the assignment information with the reference time information at the time of the association as the transmission time information. A time allocation transmission signal output means for outputting and transmitting the allocation information and the current time information to the same or another transmission path as the time allocation transmission signal and transmitting the broadcast information, Receiving the transmission signal, reproducing the multiplexed signal and outputting a reproduced multiplexed signal, and separating the broadcast time information data and the video signal or the audio signal from the reproduced multiplexed signal. Separating means for outputting the reproduced broadcast time information data, the reproduced video signal or the reproduced audio signal,
A reference signal reproducing unit that reproduces a reproduction reference signal synchronized with the reference signal from the output signal of the separation unit, and operates the separation unit based on the reproduction reference signal; and a time allocation transmission signal receiving unit that receives the time allocation transmission signal. Decoding means for reproducing the allocation information from the output signal of the time allocation transmission signal receiving means as reproduction allocation information, and reproducing the reference time information and outputting the reference time information as reproduction time information when the reproduction is performed. Means, time conversion means for reproducing the transmission time information from the reproduction allocation information from the decoding means and the reproduction reference signal from the reference signal reproduction means, and outputting the reproduction time information as reproduction transmission time information; The reception time information and the reproduction / transmission time information from the time conversion means, or the reception time information from the decoding means and the time conversion From the reproduction transmission time information and the reproduction broadcast time information data from, calculating and calculating broadcast delay information representing a difference between the broadcast time information data and the reception time information, and calculating means for outputting the broadcast delay information; Using the broadcast delay information that is the output signal of the arithmetic means,
Delay means for delaying the reproduced video signal or the reproduced audio signal.

In case 2 and case 3 in FIG. 16, the broadcast time is earlier than the broadcast start time. The delay means delays the video signal and the audio signal by the time obtained by the broadcast delay information, and outputs the video signal and the audio signal on the receiving side in real time.

In order to achieve the first or second object of the present invention, the following measures are taken.

One logical channel is composed of a video signal, an audio signal, a data signal, or a composite signal thereof. Time information indicating the current time is assigned to one of the logical channels. One is data signal and video signal, the other is data signal and audio signal,
Alternatively, one broadcast signal composed of a data signal, a video signal, and an audio signal is allocated, and further, a plurality of logical channels are combined into one physical channel, and a broadcast data transmitting device that transmits the physical channel unit and a broadcast data transmitting device. A broadcast data transmitting / receiving system having a broadcast data receiving device for receiving, the broadcast data transmitting device comprising: a transmission time information logical channel to which transmission time information indicating a reference time on the broadcast data transmitting device side is assigned; Wherein the broadcast data receiving apparatus converts the transmission time information into video or audio and uses the additional information data or the broadcast signal including broadcast time information data indicating a reference time of the broadcast signal. And a broadcast signal logical channel to which the transmission time information logical channel is assigned. Multiplexing means for multiplexing the broadcast signal logical channel and other logical channels according to a reference signal and outputting a multiplexed signal; reference signal generating means for outputting a reference signal for operating the multiplexing means; and Transmission signal output means for generating the transmission signal and outputting the transmission signal to a transmission path, wherein the broadcast data receiving apparatus receives the transmission signal, reproduces the multiplex signal, and reproduces the multiplex signal. Receiving demodulation means for outputting the transmission time information logical channel, the additional information data or the broadcast time information data, and the video signal or the audio signal from the reproduced multiplexed signal,
Separation means for outputting as reproduction transmission time information, reproduction additional information data or reproduction broadcast time information data, a reproduction video signal or a reproduction audio signal, and reproducing a reproduction reference signal synchronized with the reference signal from an output signal of the separation means. ,
Reference signal reproducing means for operating the separating means in accordance with the reproduction reference signal, and reception time information indicating a current time on the broadcast data receiving device side, or delay information indicating a difference between the reproduction transmission time information and the reception time information Time acquisition means for acquiring any one of the, the output signal of the time acquisition means and the reproduction transmission time information, or, from the output signal of the time acquisition means and the reproduction transmission time information and the reproduction broadcast time information data, An arithmetic means for calculating and obtaining the reception time information or broadcast delay information representing a difference between the broadcast time information data and the reception time information, and outputting the reception time information or the broadcast delay information; and the arithmetic means Using the output signal of the above and the reproduction additional information data to generate video time information or audio time information for converting the reception time information into video or audio Time output generating means, and using the broadcast delay information, which is an output signal of the arithmetic means, to delay the reproduced video signal or the reproduced audio signal, and the video time information from the time output generating means and Delay synthesis means for synthesizing a reproduced video signal or the audio time information and the reproduced audio signal and outputting the synthesized signal.

The delay synthesizing means corresponds to case 1 in FIG.
In the case of, the time display is synthesized on the television screen or a time signal is added to the audio signal. In the case 2 and case 3 in FIG. 16, the video signal and the audio signal are delayed by the time obtained by the broadcast delay information, and the receiving side outputs the video signal and the audio signal according to the real time, and also outputs the video signal and the audio signal according to the real time. Synthesize the time display on the TV screen or add the time signal to the audio signal. Also, if it is longer than the delay time that can be processed on the receiving side, delay as much as possible, then synthesize the time display on the TV screen as real time, add the time signal to the audio signal, etc. I do.

In order to achieve the first or second object of the present invention, the following measures are taken.

One logical channel is constituted by a video signal, an audio signal, a data signal, or a composite signal thereof. At least one of the logical channels includes a data signal and a video signal, a data signal and an audio signal, or a data signal. One broadcast signal composed of a video signal and an audio signal is allocated, and further, a plurality of logical channels are combined into one physical channel, and a broadcast data transmitting apparatus transmitting the physical channel unit and broadcast data receiving the broadcast data are transmitted. In a broadcast data transmitting and receiving system having a receiving device,
The broadcast data transmitting device may further include, in the data signal, additional information data used when the broadcast time receiving device converts transmission time information into video or audio, or broadcast time information data representing a reference time of the broadcast signal. A multiplexing means for multiplexing the broadcast signal logical channel and other logical channels according to a reference signal and outputting a multiplexed signal, the multiplexing means having: Reference signal generating means for outputting a reference signal for operating the multiplexed signal, transmission signal output means for generating the physical channel from the multiplexed signal to generate a transmission signal, and outputting the transmission signal to a transmission path, and the broadcast data transmission device side Reference time information output means for outputting as reference time information representing the reference time of the reference time, and the reference signal and the reference time information are associated with each other. Allocating means for outputting the allocation information as the allocation information and the reference time information at the time of correspondence as the transmission time information; and transmitting the allocation information and the current time information to or from the transmission path. Output means for outputting and transmitting a time-allocated transmission signal to a channel, wherein the broadcast data receiving apparatus receives the transmission signal, reproduces the multiplexed signal, and outputs a reproduced multiplexed signal. Receiving demodulation means, and from the reproduced multiplexed signal,
The additional information data or the broadcast time information data,
Separating means for separating the video signal or the audio signal and outputting them as reproduction additional information data or reproduction broadcast time information data, a reproduction video signal or a reproduction audio signal, respectively, and synchronizing with the reference signal from the output signal of the separation means A reference signal reproducing means for reproducing the reproduced reproduction reference signal and operating the separating means based on the reproduction reference signal; a time allocation transmission signal receiving means for receiving the time allocation transmission signal; and an output of the time allocation transmission signal receiving means. Decoding means for reproducing the allocation information from the signal to obtain reproduction allocation information, and reproducing the reference time information and outputting the reference time information as reception time information when reproducing the reproduction; and the reproduction allocation information from the decoding means. And reproduces the transmission time information from the reproduction reference signal from the reference signal reproduction means and outputs it as reproduction transmission time information Time conversion means, the reception time information from the decoding means and the reproduction / transmission time information from the time conversion means, or the reception time information from the decoding means and the reproduction / transmission time information from the time conversion means And from the reproduced broadcast time information data, calculating and calculating broadcast delay information representing a difference between the broadcast time information data and the reception time information, and calculating means for outputting the reception time information or the broadcast delay information, Time output generating means for generating video time information or audio time information for converting the reception time information into video or audio using an output signal of the arithmetic means and the reproduction additional information data, and an output signal of the arithmetic means Using the broadcast delay information, delaying the reproduced video signal or the reproduced audio signal, and setting the video time from the time output generating means. A delay synthesizing means for outputting the reproduced video signal and broadcast, or the reproduced audio signal synthesis to the said voice time information.

The delay synthesizing means corresponds to case 1 in FIG.
In the case of, the time display is synthesized on the television screen or a time signal is added to the audio signal. In the case 2 and case 3 in FIG. 16, the video signal and the audio signal are delayed by the time obtained by the broadcast delay information, and the receiving side outputs the video signal and the audio signal according to the real time, and also outputs the video signal and the audio signal according to the real time. Synthesize the time display on the TV screen or add the time signal to the audio signal. Also, if it is longer than the delay time that can be processed on the receiving side, delay as much as possible, then synthesize the time display on the TV screen as real time, add the time signal to the audio signal, etc. I do.

[0044]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a broadcast data transmitting / receiving system according to the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a broadcast data transmission / reception system according to the present invention, and is applied to cases 1 and 2 in FIG.

Reference numeral 100 denotes an encoder for compressing an audio signal or a video signal, 101 denotes an audio signal input terminal, 102 denotes a video signal input terminal, 103 denotes a data signal input terminal, and subscripts a, b,. Indicates that a signal is composed, and 1
Assigned to logical channel. Reference numeral 104 denotes a transmission time information input terminal indicating a reference time on the data transmitting apparatus side assigned to one logical channel, 105 denotes a reference clock signal input terminal, 106 denotes a multiplexing unit that multiplexes logical channels into one stream, and 107 denotes a multiplexing unit. An encoding unit that performs digital signal processing such as addition of an error correction code, interleaving processing, and convolution processing on the stream of the multiplexing unit, 108, a modulation unit that modulates an output signal of the encoding unit, and 109, a reference counter unit. . 1
Numeral 11 denotes a physical channel section composed of 100 to 109, and the subscripts of A, B, C, D... Represent different physical channels. A transmission antenna 110 transmits each physical channel from the transmission antenna 110.

Reference numeral 112 denotes a reception antenna, 113 denotes a physical channel selection unit, 114 denotes a demodulation unit, 115 denotes a decoding unit that performs the reverse operation of the coding unit 107, 116 denotes a separation unit that separates one logical channel, and 117
Is a decoder unit that performs the reverse operation of the encoder unit 100 to expand audio and video signals, 118 and 119 are combining units, 120 is an additional information data decoder unit, 121 is a time operation unit, 122 is a clock reproducing unit, and 123 is a conversion unit. Reference numeral 124 denotes an audio signal output terminal, and reference numeral 125 denotes a video signal output terminal.

The audio and video signals input from the input terminals 101 and 102 are compressed by the encoder 100 and
Is output to At the same time, a data signal is input from input terminal 103 and sent to multiplexing section 106. A broadcast signal is composed of an audio signal, a video signal, and a data signal, and is assigned to one logical channel. The data signal contains additional information data. The additional information data will be described later.

On the other hand, if the transmission time information is 1
The data is input as a logical channel and sent to the multiplexing unit 106.

The reference counter unit 109 operates with the reference clock signal from the input terminal 105, and operates the multiplexing unit 106 while multiplexing the counter values in the multiplexing unit 106.

The multiplexing unit 106 multiplexes these logical channels and counter values into one stream. The encoding unit 107 encodes this stream. Although various processes are involved in encoding, processing time is particularly required when time interleaving is performed. The output signal of coding section 107 is modulated by modulating section 108 and transmitted from transmitting antenna 110 as one physical channel. Frequency multiplexing is performed by using a quadrature modulation scheme such as 64QAM or QPSK or a digital modulation scheme such as OFDM as a modulation scheme of the modulation unit 108.

The transmitted signal is received by the receiving antenna 112, the selection unit 113 selects a physical channel to be obtained, and the demodulation unit 1
Demodulate at 14. The output signal of demodulation section 114 is decoded by decoding section 115. When time interleaving is performed by the coding unit 107, the decoding unit 115 performs the reverse process so that the coding unit 1
Same processing time as 07. These modulation side, reception side,
The delay caused by the processing time of the transmission path is referred to as an elapsed time here.

As the output signal of the decoding unit 115, the same stream as the stream which is the output signal of the multiplexing unit 106 is reproduced.

[0054] The 1 to which the broadcast signal is assigned by the separation unit 116
The logical channel is separated and the transmission time information is separated and reproduced. The decoder unit 117 expands and outputs the audio signal and the video signal.

The clock reproducing unit 122 reproduces a clock by the operation described with reference to FIG.

From the input terminal 123, a conversion time is input. The conversion time is the difference between the transmission time information reproduced at a certain actual time and the actual time on the receiving side. This is equal to the elapsed time.

This is measured and set, for example, when the receiving device is purchased.

The time calculation unit 121 calculates the actual time from the conversion time and the transmission time information, and
Output to 0.

The additional information data decoder 120 uses the additional information data included in the data signal in the separated broadcast signal. The additional information data includes, for example, a display position, a display color, a display font, a display size, a display type (for example, whether to use a digital clock or an analog clock) of the time display 1502 in FIG. It is the correspondence information decided by the receiving side and the receiving side. Alternatively, the additional information is, for example, correspondence information in which the transmitting side and the receiving side have determined the real time information to be a time signal, the length of the time signal, the type of the time signal, the pitch of the time signal, and the like. The additional information data decoder unit 120, according to this correspondence information,
An additional video signal and an additional audio signal are generated for the real time calculated from 21.

The synthesizer 118 uses the audio signal and the additional audio signal expanded by the decoder 117, and the synthesizer 119 uses the decoder 1
The decompressed video signal and the additional video signal are combined at 17, and the combined audio signal is output from the output terminal 124 and the combined video signal is output from the output terminal 125.

According to the embodiment shown in FIG. 1, there is an effect that an accurate real time can be obtained from the receiving apparatus by a simple method of setting the conversion time only once.

FIG. 2 shows another embodiment of the broadcast data transmitting / receiving system of the present invention.

FIG. 2 is a block diagram of a broadcast data transmission / reception system according to the present invention, and is applied to cases 1 and 2 in FIG.

The same reference numerals as those in FIG. 1 denote the same functions, reference numeral 201 denotes a time calculation unit, and reference numeral 202 denotes a time information input terminal.

In the embodiment of FIG. 2, the real time on the receiving side is input from the input terminal 202.

The time calculation unit 201 calculates a conversion time from the actual time and the transmission time information. If the real time from the input terminal 202 is always input, the real time is directly input to the additional information data decoder
Output to 0. If the real time input from the input terminal 202 is performed only at a key point such as when the receiving device is purchased, the real time is calculated from the transmission time information based on the calculated conversion time,
Output to additional information data decoder section 120.

According to the embodiment shown in FIG. 2, the content to be set is a simple method of real time, or if the real time is continuously input, the content of the real time may be used. There is an effect that an accurate real time can be obtained from the receiving device.

FIG. 3 shows another embodiment of the broadcast data transmitting / receiving system of the present invention.

FIG. 3 is a block diagram of the broadcast data transmission / reception system of the present invention, and is applied to the cases 1 and 2 in FIG.

The same reference numerals as in FIG. 2 denote the same functions, reference numeral 301 denotes a receiving antenna, 302 denotes a demodulation unit, and 303 denotes a decoding unit.

In the embodiment of FIG. 3, the input of time information from the input terminal 202 of FIG. 2 is automated.

The accurate real time information can be obtained from the current GPS (Global Pos
It is transmitted by the Entry System and other services and can be used by the general public. The receiving antenna 301 receives the service including the transmitted real time information, demodulates the demodulation unit 302, and extracts the real time information by the decoding unit 303. Note that the receiving antenna 301 may be shared with the receiving antenna 112.

According to the embodiment shown in FIG. 3, since accurate real time information can be obtained automatically, there is an effect that a simple and accurate real time receiving apparatus can be constructed.

FIG. 4 is a block diagram of a broadcast data transmission / reception system according to the present invention, and is applied to the cases 1 and 2 in FIG.

The same reference numerals as those in FIG. 2 denote the same functions, 401 is a telephone line, 402 is a modem unit, and 403 is a decoding unit.

In the embodiment of FIG. 4, the input of the real time information from the input terminal 202 of FIG. 2 is automated, and a system for obtaining a service including the real time information using a telephone line. The modem unit 402 makes a call using the telephone line 401 to perform a service including the real time information, receives and demodulates the service, and the decoding unit 403 extracts the real time information.

According to the embodiment shown in FIG. 4, accurate real time information can be automatically obtained, so that a simple and accurate real time receiving device can be constructed.

FIG. 5 is a block diagram of the broadcast data transmission / reception system of the present invention, and is applied to the cases 1 and 2 in FIG.

The same reference numerals as those in FIG. 4 denote the same functions, reference numeral 501 denotes an assignment unit, 502 denotes a modem unit, 503 denotes a decoding unit, 504 denotes a time conversion unit, and 505 denotes a time calculation unit.

In the embodiment of FIG. 5, the transmission time information from the input terminal 104 in the embodiment of FIG. 4 is transmitted using a telephone line. Similarly, the real time information is transmitted using a telephone line. Is transmitted from the receiving side to the receiving side.

The reference counter unit 109 operates with the reference clock signal from the input terminal 105, operates the multiplexing unit 106 while multiplexing the counter values in the multiplexing unit 106, and simultaneously inputs the counter values to the allocating unit 501. I do. Assigning section 501 has input terminal 10
The transmission time information from 4 is associated with the count value of the reference counter unit 109 at that time. The transmission time information from the input terminal 104 and the allocation information that is the output signal of the allocation
It is transmitted by telephone line 401 using 02.

On the receiving side, the transmitted transmission time information and allocation information are received and demodulated by the modem unit 402, and the transmission time information and allocation information are extracted by the decoding unit 403. Where telephone line 40
Since the modulation and demodulation methods of 1 and the modem units 502 and 402 are transmission lines and signal processing in which the elapsed time is almost negligible, the demodulated transmission time information can be used as real time. The time conversion unit 504 obtains the allocation information and the real time from the decoding unit 503, obtains the difference between this counter value and the counter unit in the clock recovery unit 122, and transmits the transmission time information including the elapsed time from the difference and the real time. Get. The time calculation unit 505 calculates the conversion time from the transmission time information including the actual time and the elapsed time. If the telephone line 401 is connected and the real time is constantly received, the real time is output to the additional information data decoder unit 120 as it is from the time calculation unit 505. If the telephone line 401 is a key point and there is nothing, calculate the actual time from the transmission time information based on the calculated conversion time,
Output to additional information data decoder section 120.

According to the embodiment shown in FIG. 5, since accurate real time information can be obtained automatically, there is an effect that a simple and accurate receiving device for real time can be constructed. Also,
Since it is not necessary to send the transmission time information using one logical channel, there is an effect that other information can be multiplexed accordingly.

FIG. 6 is a block diagram of a broadcast data transmission / reception system of the present invention, and is applied to the cases 1 and 2 in FIG.

The same reference numerals as in FIG. 4 indicate the same functions, and reference numeral 601 denotes a cable.

In the embodiment of FIG. 6, the transmission path of the physical channel in FIG. 4 is a cable 601;
5 shows an embodiment in V digital broadcasting.

In CATV digital broadcasting, when CS digital broadcasting is received and retransmitted, error correction is performed once, a correction code is newly added, or an encryption code is added for conditional access to perform remodulation. In this case, the processing time of the digital signal may be accumulated.

According to the embodiment shown in FIG. 6, since accurate real time information can be obtained automatically, there is an effect that a simple and accurate real time receiving apparatus can be constructed. Also,
The embodiment of FIG. 6 can be applied to the embodiments of FIGS. 1, 2 and 3.

FIG. 7 is a block diagram of a broadcast data transmission / reception system of the present invention, and is applied to the cases 1 and 2 in FIG.

The same reference numerals as those in FIGS. 5 and 6 indicate the same functions.

In the embodiment of FIG. 7, the embodiment of FIG. 6 is applied to the embodiment of FIG. 5, that is, the transmission path of the physical channel is a cable 601 and the telephone line 401
Instead, a cable 601 is used.

According to the embodiment shown in FIG. 7, since accurate real time information can be obtained automatically, there is an effect that a simple and accurate real time receiving device can be constructed. Also,
Since it is not necessary to send the transmission time information using one logical channel, there is an effect that other information can be multiplexed accordingly.
Further, since a dedicated cable is used, there is an effect that the connection is always possible without the cost of a telephone line.

FIG. 8 is a block diagram of the broadcast data transmission / reception system of the present invention, and is applied to the cases 1, 2, and 3 in FIG.

The same reference numerals as those in FIG. 2 denote the same functions, and reference numeral 801 denotes a broadcast recording time information input terminal. Subscripts a, b,... Correspond to the respective broadcast signals. 802 is a time calculation unit.

The broadcast recording time information input from the input terminal 801 is composed of transmission time information input from the input terminal 104 indicating the reference time of the data transmitting apparatus and reference time at a location where the broadcast signal is recorded. This is a time representing the difference, and is referred to as a margin time here. In case 3 of FIG. 16, the time is "10" seconds, and in case 1 and case 2, it is "00" seconds. The extra time is set to be longer than the expected elapsed time.

The time calculation unit 802 calculates the real time from the broadcast recording time information, the transmission time information and the real time separated by the separation unit 116, and outputs it to the additional information data decoder unit 120.
If the real time from the input terminal 202 is always input, the real time is output to the additional information data decoder unit 120 as it is from the time calculation unit 201. If the real time input from the input terminal 202 is performed only at a key point such as when the receiving device is purchased, the real time is calculated from the transmission time information based on the calculated conversion time, and the additional information data decoder 12
Output to 0.

According to the embodiment shown in FIG. 8, the content to be set is a simple method of real time, or if the real time is continuously input, the content of the real time may be used. There is an effect that an accurate real time can be obtained from the receiving device. Further, the embodiment of FIG. 8 can be applied to the embodiments of FIGS. 1, 3, 4, and 6.

FIG. 9 is a block diagram of a broadcast data transmission / reception system according to the present invention, and is applied to cases 1, 2, and 3 in FIG.

The same reference numerals as those in FIGS. 7 and 8 indicate the same functions.
Reference numeral 901 denotes a time calculation unit.

FIG. 9 shows the embodiment of FIG. 8 applied to FIG.

The time calculation unit 901 calculates the conversion time from the broadcast recording time information separated by the separation unit 116, the transmission time information including the elapsed time, and the actual time.

According to the embodiment shown in FIG. 9, since accurate real time information can be obtained automatically, there is an effect that a receiving device capable of accurately real time can be easily constructed. Also,
Since it is not necessary to send the transmission time information using one logical channel, there is an effect that other information can be multiplexed accordingly.
Further, since a dedicated cable is used, there is an effect that the connection is always possible without the cost of a telephone line. Further, the embodiment of FIG. 9 can be applied to the embodiment of FIG.

FIG. 10 is a block diagram of the broadcast data transmission / reception system of the present invention, and is applied to the cases 2 and 3 in FIG.

The same reference numerals as those in FIG. 8 denote the same functions, 1001 denotes a time operation unit, and 1002 and 1003 denote delay units.

The time calculation unit 1001 calculates the conversion time from the actual time and the transmission time information, and outputs it to the delay units 1002 and 1003.

The delay units 1002 and 1003 delay the audio signal and the video signal by the conversion time obtained by the time operation unit 1001, respectively, and output the video signal and the audio signal on the receiving side in real time.

According to the embodiment of FIG. 10, the content to be set is a simple method of real time, and there is an effect that an audio signal and a video signal can be output according to the real time. Also,
The embodiment of FIG. 10 can also be applied to the embodiments of FIGS. 1, 3, 4, and 6.

FIG. 11 is a block diagram of the broadcast data transmission / reception system of the present invention, and is applied to the cases 2 and 3 in FIG.

The same reference numerals as those in FIGS. 9 and 10 denote the same functions, and reference numeral 1101 denotes a time calculation unit.

FIG. 11 shows the embodiment of FIG. 10 applied to FIG.

The time calculation unit 1101 calculates the conversion time from the broadcast recording time information separated by the separation unit 116, the transmission time information including the elapsed time, and the actual time.

According to the embodiment shown in FIG. 11, accurate real time information can be obtained automatically, so that there is an effect that a video signal and an audio signal can be easily output according to the real time. Further, since it is not necessary to transmit the transmission time information using one logical channel, there is an effect that a large amount of other information can be multiplexed. Further, since a dedicated cable is used, there is an effect that the connection is always possible without the cost of a telephone line. Further, the embodiment of FIG. 11 can be applied to the embodiment of FIG.

FIG. 12 is a block diagram of a broadcast data transmission / reception system of the present invention, and is applied to cases 1, 2, and 3 in FIG.

The same reference numerals as those in FIG.
1202 is a delay synthesis unit.

In case 1 shown in FIG. 16, the delay synthesizing unit 1201 expands the audio signal expanded by the decoder unit 117 and the additional audio signal from the additional information data decoder unit 120, and the delay synthesizing unit 1202 expands the audio signal by the decoder unit 117. The combined video signal and the additional video signal from the additional information data decoder unit 120 are combined, and a combined audio signal is output from an output terminal 124 and a combined video signal is output from an output terminal 125.

In cases 2 and 3 in FIG. 16, the delay synthesizing units 1201 and 1202 delay the audio signal and the video signal by the conversion time obtained by the time calculation unit 802, respectively, and And an additional audio signal and an additional video signal, respectively. If the conversion time obtained by the time calculation unit 802 is equal to or longer than the delay time that can be processed on the receiving side,
The delay is made as much as possible, and then the time display is synthesized on the television screen according to the real time, or a time signal is added to the audio signal.

According to the embodiment shown in FIG. 12, the content to be set is a simple method of the real time, so that the audio signal and the video signal can be output according to the real time, and the accurate real time can be obtained from the receiving apparatus. There is an effect that can be. Further, the embodiment of FIG. 10 can be applied to the embodiments of FIGS. 1, 3, 4, and 6.

FIG. 13 is a block diagram of a broadcast data transmission / reception system according to the present invention, and is applied to cases 1, 2, and 3 in FIG.

The same reference numerals as those in FIGS. 9 and 12 denote the same functions.

FIG. 13 shows the embodiment of FIG. 12 applied to FIG.

According to the embodiment of FIG. 13, accurate real time information can be obtained automatically, so that video signals and audio signals can be easily output in accordance with the real time, and accurate reception of the real time can be achieved. There is an effect that the device can be constructed. Further, since it is not necessary to transmit the transmission time information using one logical channel, there is an effect that a large amount of other information can be multiplexed. Further, since a dedicated cable is used, there is an effect that the connection is always possible without the cost of a telephone line. Further, the embodiment of FIG. 11 can be applied to the embodiment of FIG.

[0122]

According to the present invention, the processing time when the live broadcast on the transmitting side is subjected to image compression such as MPEG2 using a real-time encoder, the compressed image decoding processing time on the receiving side, and the terrestrial digital broadcasting Digital signal processing time such as interleaving time when time interleaving is performed, as well as CATV digital broadcasting, when CS digital broadcasting is received and retransmitted, etc. Even if there is an elapsed time such as a digital signal processing time when re-modulating and transmitting after re-modulating by adding an encryption code for conditional access, at least the time display and the time signal are only on the receiving side. Since it is possible to indicate the exact real time or to output the video signal and audio signal on the receiving side according to the real time, the time can be Therefore, there is an effect that a reliable digital broadcasting system can be constructed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a broadcast data transmission / reception system according to an embodiment of the present invention.

FIG. 2 is a block diagram of a broadcast data transmission / reception system according to one embodiment of the present invention.

FIG. 3 is a block diagram of a broadcast data transmission / reception system according to an embodiment of the present invention.

FIG. 4 is a block diagram of a broadcast data transmission / reception system according to an embodiment of the present invention.

FIG. 5 is a block diagram of a broadcast data transmission / reception system according to an embodiment of the present invention.

FIG. 6 is a block diagram of a broadcast data transmission / reception system according to an embodiment of the present invention.

FIG. 7 is a block diagram of a broadcast data transmission / reception system according to an embodiment of the present invention.

FIG. 8 is a block diagram of a broadcast data transmission / reception system according to an embodiment of the present invention.

FIG. 9 is a block diagram of a broadcast data transmission / reception system according to an embodiment of the present invention.

FIG. 10 is a block diagram of a broadcast data transmission / reception system according to an embodiment of the present invention.

FIG. 11 is a block diagram of a broadcast data transmission / reception system according to an embodiment of the present invention.

FIG. 12 is a block diagram of a broadcast data transmission / reception system according to an embodiment of the present invention.

FIG. 13 is a block diagram of a broadcast data transmission / reception system according to an embodiment of the present invention.

FIG. 14 is a block diagram for reproducing a system clock according to a conventional example of the present invention.

FIG. 15 is an example of time display on a television screen for explaining the present invention.

FIG. 16 is a time relationship diagram for explaining the present invention.

[Explanation of symbols]

100 ... Encoder section for compressing audio and video signals, 101
... Audio signal input terminal, 102 ... Video signal input terminal, 103 ... Data signal input terminal, 104 ... Transmission time information input terminal, 105 ...
Reference clock signal input terminal, 106: multiplexing unit, 107: coding unit, 108: modulation unit, 109: reference counter, 110: transmission antenna, 111: physical channel unit, 112: reception antenna, 11
3 ... Physical channel selection unit, 114 ... Demodulation unit, 115 ... Decoding unit, 116 ... Separation unit, 117 ... Decoder unit, 118, 119 ... Synthesis unit, 120 ... Additional information data decoder unit, 121 ... Time operation unit, 122 … Clock regeneration unit, 123… Conversion time input terminal, 12
4… Audio signal output terminal, 125… Video signal output terminal, 201
... time calculation unit, 202 ... time information input terminal, 301 ... reception antenna, 302 ... demodulation unit, 303 ... decoding unit, 401 ... telephone line, 402
... Modem section, 403 ... Decoding section, 501 ... Allocating section, 502 ... Modem section, 503 ... Decoding section, 504 ... Time conversion section, 505 ... Time calculation section, 601 ... Cable, 801 ... Broadcast recording time information input terminal,
802: time calculation unit, 901: time calculation unit, 1001: time calculation unit, 1002, 1003: delay unit, 1101: time calculation unit, 1201, 12
02: Delay synthesis unit, 1401: PCR input terminal, 1402: Subtractor, 1
403: Low-pass filter (hereinafter abbreviated as LPF), 1404: Voltage-controlled oscillator (hereinafter abbreviated as VCO), 1405: STC counter, 1406: Clock output terminal, 1501: TV screen, 1502
… Time display.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Jin Akiyama 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Digital Media Development Division, Hitachi, Ltd. 292 F-term (reference) in Digital Media Development Division, Hitachi, Ltd.

Claims (41)

[Claims] 1. One logical channel is constituted by a video signal, an audio signal, a data signal, or a composite signal thereof. Time information indicating a current time is assigned to one of the logical channels. At least one of a data signal and a video signal, a data signal and an audio signal,
Alternatively, a broadcast data transmission device configured to allocate one broadcast signal composed of a data signal, a video signal, and an audio signal, further collectively form a plurality of logical channels into one physical channel, and transmit the physical data in units of the physical channel; A broadcast data transmitting / receiving system having a broadcast data receiving device for receiving the broadcast data transmitting device, the broadcast data transmitting device comprising: a transmission time information logical channel to which transmission time information indicating a reference time on the broadcast data transmitting device side is assigned; One of the broadcasts, wherein the signal includes additional information data used when the transmission time information is visualized or converted into audio in the broadcast data receiving device, or broadcast time information data indicating a reference time of the broadcast signal. A broadcast signal logical channel to which a signal is assigned, and the transmission time information logical channel. Multiplexing means for multiplexing the broadcast signal logical channel and the other logical channels according to a reference signal and outputting a multiplexed signal; reference signal generating means for outputting a reference signal for operating the multiplexing means; And a transmission signal output unit that outputs the transmission signal to a transmission path, wherein the broadcast data receiving apparatus receives the transmission signal, reproduces the multiplexed signal, and reproduces and multiplexes the reproduced signal. Receiving demodulation means for outputting a signal; separating the transmission time information logical channel, the additional information data or the broadcast time information data, and the video signal or the audio signal from the reproduced multiplexed signal;
Separation means for outputting as reproduction transmission time information, reproduction additional information data or reproduction broadcast time information data, a reproduction video signal or a reproduction audio signal, and reproducing a reproduction reference signal synchronized with the reference signal from an output signal of the separation means. ,
Reference signal reproducing means for operating the separating means in accordance with the reproduction reference signal, and reception time information indicating a current time on the broadcast data receiving device side, or delay information indicating a difference between the reproduction transmission time information and the reception time information Time acquisition means for acquiring any one of the, the output signal of the time acquisition means and the reproduction transmission time information, or, from the output signal of the time acquisition means and the reproduction transmission time information and the reproduction broadcast time information data, An arithmetic means for calculating and obtaining the reception time information or broadcast delay information representing a difference between the broadcast time information data and the reception time information, and outputting the reception time information or the broadcast delay information; and the arithmetic means Using the output signal of the above and the reproduction additional information data to generate video time information or audio time information for converting the reception time information into video or audio Time output generating means, and synthesizing means for synthesizing and outputting the video time information and the reproduced video signal from the time output generating means or the audio time information and the reproduced audio signal. Broadcast data transmission and reception system. 2. The broadcast data transmitting / receiving system according to claim 1, wherein said transmission path is a cable television. 3. A broadcast data transmitting apparatus used in the broadcast data transmitting / receiving system according to claim 1, wherein transmission time information indicating a reference time on said broadcast data transmitting apparatus side is assigned. A channel and the data signal include additional information data used when the transmission time information is visualized or voiced in the broadcast data receiving device, or broadcast time information data representing a reference time of the broadcast signal. Multiplexing means for multiplexing the transmission time information logical channel, the broadcast signal logical channel and the other logical channels according to a reference signal, and outputting a multiplexed signal, having one broadcast signal logical channel to which the broadcast signal is assigned. Reference signal generating means for outputting a reference signal for operating the multiplexing means; Generated by the transmission signal, the transmission used for broadcast data transmission and reception system, characterized by having the a transmission signal output means for outputting the transmission signal to a transmission line device. 4. A broadcast data receiving apparatus used in the broadcast data transmitting / receiving system according to claim 1, wherein said receiving apparatus receives said transmission signal, reproduces said multiplex signal, and outputs a reproduced multiplex signal. Means for separating the transmission time information logical channel, the additional information data or the broadcast time information data, and the video signal or the audio signal from the reproduction multiplexed signal, respectively, Separating means for outputting data or reproduced broadcast time information data, a reproduced video signal or a reproduced audio signal; reproducing a reproduction reference signal synchronized with the reference signal from an output signal of the separation means; Reference signal reproducing means for operating, and reception time information indicating the current time of the broadcast data receiving device side,
Or time acquisition means for acquiring any one of delay information indicating a difference between the reproduction transmission time information and the reception time information, and an output signal of the time acquisition means and the reproduction transmission time information, or the time acquisition means From the output signal and the reproduction transmission time information and the reproduction broadcast time information data, the reception time information, or broadcast delay information representing the difference between the broadcast time information data and the reception time information is calculated and obtained.
Calculating means for outputting the reception time information or the broadcast delay information; video time information or audio time for converting the reception time information into video or audio using the output signal of the calculation means and the reproduction additional information data Time output generating means for generating information; and synthesizing means for synthesizing the video time information and the reproduced video signal from the time output generating means, or synthesizing the audio time information and the reproduced audio signal, and outputting the synthesized signal. A receiver for use in a broadcast data transmission / reception system. 5. The receiving apparatus according to claim 4, wherein said time obtaining means receives a current time transmission signal including current time information transmitted on the same or different transmission path as said transmission path. The present invention is used for a broadcast data transmission / reception system, comprising: a transmission signal receiving unit; and a decoding unit that reproduces the current time information from an output signal from the current time transmission signal receiving unit and sets the received time information. Receiver. 6. A receiving apparatus according to claim 5, wherein said another transmission path is a telephone line. 7. One logical channel is composed of a video signal, an audio signal, a data signal, or a composite signal thereof. At least one of the logical channels includes a data signal and a video signal, a data signal and an audio signal, or a data signal. One broadcast signal composed of a signal, a video signal, and an audio signal is allocated, and a plurality of logical channels are combined into one physical channel, and a broadcast data transmitting apparatus that transmits the physical channel unit and receives the broadcast data. In a broadcast data transmitting and receiving system having a broadcast data receiving device,
The broadcast data transmitting device may further include, in the data signal, additional information data used when the broadcast time receiving device converts transmission time information into video or audio, or broadcast time information data representing a reference time of the broadcast signal. A multiplexing means for multiplexing the broadcast signal logical channel and other logical channels according to a reference signal and outputting a multiplexed signal, the multiplexing means having: Reference signal generating means for outputting a reference signal for operating the multiplexed signal, transmission signal output means for generating the physical channel from the multiplexed signal to generate a transmission signal, and outputting the transmission signal to a transmission path, and the broadcast data transmission device side Reference time information output means for outputting as reference time information representing the reference time of the reference time, and the reference signal and the reference time information are associated with each other. Allocating means for outputting the allocation information as the allocation information and the reference time information at the time of correspondence as the transmission time information; and transmitting the allocation information and the current time information to or from the transmission path. Output means for outputting and transmitting a time-allocated transmission signal to a channel, wherein the broadcast data receiving apparatus receives the transmission signal, reproduces the multiplexed signal, and outputs a reproduced multiplexed signal. Receiving demodulation means, and from the reproduced multiplexed signal,
The additional information data or the broadcast time information data;
Separating means for separating the video signal or the audio signal and outputting them as reproduction additional information data or reproduction broadcast time information data, a reproduction video signal or a reproduction audio signal, respectively, and synchronizing with the reference signal from the output signal of the separation means A reference signal reproducing means for reproducing the reproduced reproduction reference signal and operating the separating means based on the reproduction reference signal; a time allocation transmission signal receiving means for receiving the time allocation transmission signal; and an output of the time allocation transmission signal receiving means. Decoding means for reproducing the allocation information from the signal to obtain reproduction allocation information, and reproducing the reference time information and outputting the reference time information as reception time information when reproducing the reproduction; and the reproduction allocation information from the decoding means. And reproduces the transmission time information from the reproduction reference signal from the reference signal reproduction means and outputs it as reproduction transmission time information Time conversion means, the reception time information from the decoding means and the reproduction / transmission time information from the time conversion means, or the reception time information from the decoding means and the reproduction / transmission time information from the time conversion means And from the reproduced broadcast time information data, calculating and calculating broadcast delay information representing a difference between the broadcast time information data and the reception time information, and calculating means for outputting the reception time information or the broadcast delay information, A time output generating means for generating video time information or audio time information for converting the reception time information into video or audio using the output signal of the arithmetic means and the reproduction additional information data; and Synthesizing means for synthesizing the video time information and the reproduced video signal, or synthesizing the audio time information and the reproduced audio signal, and outputting the synthesized signal. Broadcast data transmission and reception system to be. 8. The broadcast data transmitting / receiving system according to claim 7, wherein said transmission path is a cable television. 9. A broadcast data transmitting apparatus used in the broadcast data transmitting / receiving system according to claim 7, wherein transmission time information is converted into video or audio in the broadcast data receiving apparatus in the data signal. A broadcast signal logical channel to which one of the broadcast signals is assigned, including additional information data to be used, or broadcast time information data representing a reference time of the broadcast signal, and the broadcast signal logical channel and the like. Multiplexing means for multiplexing the logical channels according to a reference signal and outputting a multiplexed signal, reference signal generating means for outputting a reference signal for operating the multiplexing means, and generating the physical channel from the multiplexed signal as a transmission signal, Transmission signal output means for outputting the transmission signal to a transmission path, and reference time information indicating a reference time on the broadcast data transmission device side. A reference time information output means for outputting,
Assignment means for associating the reference signal with the reference time information as allocation information, and the reference time information at the time of the association as the transmission time information, output means for outputting the allocation information, the allocation information and the current time Outputting information as a time-allocated transmission signal to the same or another transmission path as the transmission path,
A transmission device using a broadcast data transmission / reception system, comprising: a time-allocation transmission signal output means for transmitting. 10. A broadcast data receiving apparatus used in the broadcast data transmitting / receiving system according to claim 7 or 8,
Receiving and demodulating means for receiving the transmission signal, reproducing the multiplexed signal and outputting a reproduced multiplexed signal, from the reproduced multiplexed signal, the additional information data or the broadcast time information data, the video signal or the audio signal And a separating means for outputting as a reproduction additional information data or a reproduction broadcast time information data, a reproduction video signal or a reproduction audio signal, and reproducing a reproduction reference signal synchronized with the reference signal from an output signal of the separation means. A reference signal reproducing means for operating the separating means in accordance with the reproduction reference signal, a time allocation transmission signal receiving means for receiving the time allocation transmission signal, and reproducing the allocation information from an output signal of the time allocation transmission signal receiving means. Output the reference time information when reproducing and reproducing the reference time information as reception time information. Decoding means for reproducing the transmission time information from the reproduction assignment information from the decoding means and the reproduction reference signal from the reference signal reproduction means, and outputting the reproduction time information as reproduction transmission time information; and the decoding means. From the reception time information and the reproduction / transmission time information from the time conversion unit, or from the reception time information from the decoding unit and the reproduction / transmission time information and the reproduction broadcast time information data from the time conversion unit. Calculating means for calculating and calculating broadcast delay information representing a difference between the broadcast time information data and the reception time information, and outputting the reception time information or the broadcast delay information; an output signal of the calculation means; Time output generation means for generating video time information or audio time information for converting the reception time information into video or audio using additional information data A broadcast data transmission / reception system, comprising: synthesizing means for synthesizing the video time information and the reproduced video signal from the time output generating means, or synthesizing the audio time information and the reproduced audio signal, and outputting the synthesized signal. A receiving device that uses. 11. The broadcast data transmitting / receiving system according to claim 7, wherein said another transmission path is a telephone line. 12. The transmitting apparatus according to claim 9, wherein said another transmission path is a telephone line. 13. The receiving apparatus according to claim 10, wherein said another transmission path is a telephone line. 14. One logical channel is constituted by a video signal, an audio signal, a data signal, or a composite signal thereof. Time information indicating a current time is assigned to one of the logical channels. Is allocated to at least one of the data signal and the video signal, the data signal and the audio signal, or the one broadcast signal composed of the data signal, the video signal and the audio signal. In a broadcast data transmission / reception system having a broadcast data transmission device transmitting the physical data in units of channels and a broadcast data reception device receiving the broadcast data, the broadcast data transmission device represents a reference time on the broadcast data transmission device side. A transmission time information logical channel to which transmission time information is assigned; A broadcast signal logical channel to which one of the broadcast signals including broadcast time information data representing the reference time of the broadcast signal is assigned, and the transmission time information logical channel, the broadcast signal logical channel, and the other logical channels. Multiplexing means for multiplexing according to a reference signal and outputting a multiplexed signal, reference signal generating means for outputting a reference signal for operating the multiplexing means, and generating the physical channel from the multiplexed signal as a transmission signal; Transmission data output means for outputting to a transmission path, wherein the broadcast data receiving apparatus receives the transmission signal, reproduces the multiplexed signal, and outputs a reproduced multiplexed signal; From the signal, the transmission time information logical channel;
Separating means for separating the broadcast time information data from the video signal or the audio signal and outputting them as reproduced transmission time information, reproduced broadcast time information data, reproduced video signal or reproduced audio signal, respectively; A reference signal reproducing unit that reproduces a reproduction reference signal synchronized with the reference signal from the signal, and operates the separation unit based on the reproduction reference signal; and reception time information indicating a current time on the broadcast data receiving apparatus side; Time acquisition means for acquiring any one of delay information representing a difference between transmission time information and the reception time information, an output signal of the time acquisition means and the reproduction transmission time information, or an output signal of the time acquisition means From the reproduction transmission time information and the reproduction broadcast time information data, the reception time information, or the broadcast time information data and the reception Calculating means for calculating broadcast delay information representing a difference from the time information, and outputting the broadcast delay information; and using the broadcast delay information, which is an output signal of the arithmetic means, to obtain the reproduced video signal or the reproduced video signal. A broadcast data transmission / reception system, comprising: delay means for delaying an audio signal. 15. The broadcast data transmitting / receiving system according to claim 14, wherein said transmission path is a cable television. 16. A broadcast data transmitting apparatus used in the broadcast data transmitting / receiving system according to claim 14 or 15, wherein transmission time information indicating a reference time on said broadcast data transmitting apparatus side is assigned. Channels and
A broadcast signal logical channel to which one of the broadcast signals is assigned, wherein the data signal includes broadcast time information data representing a reference time of the broadcast signal; and the transmission time information logical channel and the broadcast signal logical channel. Multiplexing means for multiplexing the other logical channels according to the reference signal and outputting a multiplexed signal; reference signal generating means for outputting a reference signal for operating the multiplexing means; and generating the physical channel from the multiplexed signal and transmitting the multiplexed signal. And a transmission signal output means for outputting the transmission signal to a transmission path. 17. A broadcast data receiving apparatus used in the broadcast data transmission / reception system according to claim 14, wherein the reception demodulation receives the transmission signal, reproduces the multiplexed signal, and outputs a reproduced multiplexed signal. Means for separating the transmission time information logical channel, the broadcast time information data, and the video signal or the audio signal from the reproduction multiplex signal, and reproducing reproduction time information, reproduction broadcast time information data, and reproduction video, respectively. A separation unit that outputs a signal or a reproduced audio signal, a reference signal reproduction unit that reproduces a reproduction reference signal synchronized with the reference signal from an output signal of the separation unit, and operates the separation unit based on the reproduction reference signal;
Receiving time information indicating the current time on the broadcast data receiving device side, or time obtaining means for obtaining one of delay information indicating a difference between the reproduction transmission time information and the receiving time information, and the time obtaining means From the output signal and the reproduction transmission time information, or from the output signal of the time acquisition unit, the reproduction transmission time information and the reproduction broadcast time information data, the reception time information, or the broadcast time information data and the reception time information And calculating the broadcast delay information representing the difference between the reproduced video signal and the reproduced audio signal using the broadcast delay information which is an output signal of the arithmetic means, and outputting the broadcast delay information. And a delay means for delaying the transmission of the broadcast data. 18. A receiving apparatus according to claim 17, wherein said time obtaining means receives a current time transmission signal including current time information transmitted on the same or another transmission path as said transmission path. A broadcast data transmitting / receiving system comprising: a transmission signal receiving unit; and a decoding unit that reproduces the current time information from an output signal from the current time transmission signal receiving unit and uses the current time information as the reception time information. Receiver. 19. The receiving apparatus according to claim 18, wherein said another transmission path is a telephone line. 20. One logical channel is composed of a video signal, an audio signal, a data signal, or a composite signal thereof. At least one of the logical channels includes a data signal and a video signal, a data signal and an audio signal, or a data signal. One broadcast signal composed of a signal, a video signal, and an audio signal is allocated, and a plurality of logical channels are combined into one physical channel, and a broadcast data transmitting apparatus that transmits the physical channel unit and receives the broadcast data. A broadcast data transmitting / receiving system having a broadcast data receiving apparatus, wherein the broadcast data transmitting apparatus is configured to transmit a broadcast signal to which one of the broadcast signals including broadcast time information data representing a reference time of the broadcast signal is included in the data signal. Signal logical channel, and based on the broadcast signal logical channel and other logical channels. Multiplexing means for multiplexing according to a signal to output a multiplexed signal, reference signal generating means for outputting a reference signal for operating the multiplexing means, generating the physical channel from the multiplexed signal to generate a transmission signal, and transmitting the transmission signal Transmission signal output means for outputting to a channel, reference time information output means for outputting as reference time information representing a reference time on the broadcast data transmitting apparatus side, and the reference signal and the reference time information are associated with each other as allocation information; and Allocating means for outputting the allocation information using the reference time information at the time of correspondence as the transmission time information, and time allocation transmission of the allocation information and the current time information to the same or another transmission path as the transmission path. A time allocation transmission signal output means for outputting and transmitting the signal as a signal, wherein the broadcast data receiving apparatus receives the transmission signal and reproduces the multiplexed signal. Receiving and demodulating means for outputting a reproduced multiplexed signal; separating the broadcast time information data and the video signal or the audio signal from the reproduced multiplexed signal; Separation means for outputting a signal as a signal, reference signal reproduction means for reproducing a reproduction reference signal synchronized with the reference signal from an output signal of the separation means, and operating the separation means in accordance with the reproduction reference signal, and the time allocation transmission signal Time allocation transmission signal receiving means for receiving the time allocation transmission signal receiving means, and reproducing the allocation information from the output signal of the time allocation transmission signal receiving means as reproduction allocation information; and reproducing the reference time information and reproducing the reference time information. As the reception time information, the reproduction assignment information from the decoding means and the reproduction reference from the reference signal reproduction means. A time conversion unit that reproduces the transmission time information from the signal and outputs it as reproduction transmission time information; and the reception time information from the decoding unit and the reproduction transmission time information from the time conversion unit, or from the decoding unit. From the reception time information and the reproduction transmission time information and the reproduction broadcast time information data from the time conversion unit, the broadcast time information data and the broadcast delay information representing the difference between the reception time information are calculated and obtained. Calculating means for outputting the broadcast delay information;
A broadcast data transmission / reception system, comprising: a delay unit that delays the reproduced video signal or the reproduced audio signal using the broadcast delay information that is an output signal of the arithmetic unit. 21. A broadcast data transmitting / receiving system according to claim 20, wherein said transmission path is a cable television. 22. A broadcast data transmitting apparatus used in the broadcast data transmitting / receiving system according to claim 20, wherein the data signal includes broadcast time information data representing a reference time of the broadcast signal. A multiplexing unit that has a broadcast signal logical channel to which the broadcast signal is assigned, multiplexes the broadcast signal logical channel and other logical channels according to a reference signal and outputs a multiplexed signal, and a reference signal for operating the multiplexing unit. Reference signal generation means for outputting, a transmission signal output means for generating the physical channel from the multiplexed signal to generate a transmission signal, and outputting the transmission signal to a transmission path, and a reference representing a reference time on the broadcast data transmission device side Reference time information output means for outputting as time information,
Assignment means for associating the reference signal with the reference time information as allocation information, and the reference time information at the time of the association as the transmission time information, output means for outputting the allocation information, the allocation information and the current time Outputting information as a time-allocated transmission signal to the same or another transmission path as the transmission path,
A transmission device using a broadcast data transmission / reception system, comprising: a time-allocation transmission signal output means for transmitting. 23. A broadcast data receiving apparatus used in the broadcast data transmission / reception system according to claim 20, wherein the reception demodulation receives the transmission signal, reproduces the multiplex signal, and outputs a reproduction multiplex signal. Means for separating the broadcast time information data and the video signal or the audio signal from the reproduced multiplexed signal, and outputting them as reproduced broadcast time information data, a reproduced video signal or a reproduced audio signal, respectively; A reference signal reproducing unit that reproduces a reproduction reference signal synchronized with the reference signal from an output signal of the separation unit, and operates the separation unit based on the reproduction reference signal;
A time-allocated transmission signal receiving means for receiving the time-allocated transmission signal, and reproducing the allocation information from the output signal of the time-allocated transmission signal receiving means as reproduction allocation information, and reproducing and reproducing the reference time information Decoding means for outputting the reference time information as reception time information, and reproducing the transmission time information from the reproduction assignment information from the decoding means and the reproduction reference signal from the reference signal reproduction means, and reproducing reproduction time information. Time conversion means for outputting the reception time information from the decoding means and the reproduction / transmission time information from the time conversion means, or the reception time information from the decoding means and the reproduction from the time conversion means. From the transmission time information and the reproduction broadcast time information data, calculating broadcast delay information indicating a difference between the broadcast time information data and the reception time information An arithmetic unit for outputting the broadcast delay information, and a delay unit for delaying the reproduced video signal or the reproduced audio signal by using the broadcast delay information which is an output signal of the arithmetic unit. A receiving device that uses a broadcast data transmitting and receiving system. 24. The broadcast data transmission / reception system according to claim 20, wherein said another transmission path is a telephone line. 25. A transmitting apparatus according to claim 22, wherein said another transmission path is a telephone line. 26. A receiving apparatus according to claim 23, wherein said another transmission path is a telephone line. 27. One logical channel is constituted by a video signal, an audio signal, a data signal or a composite signal thereof, and time information indicating a current time is assigned to one of the logical channels. Is allocated to at least one of the data signal and the video signal, the data signal and the audio signal, or the one broadcast signal composed of the data signal, the video signal and the audio signal. In a broadcast data transmission / reception system having a broadcast data transmission device transmitting the physical data in units of channels and a broadcast data reception device receiving the broadcast data, the broadcast data transmission device represents a reference time on the broadcast data transmission device side. The transmission time information logical channel to which transmission time information is assigned and the data signal In the data receiving apparatus, one of the broadcast signals including the additional information data used when the transmission time information is visualized or converted into audio, or the broadcast time information data representing the reference time of the broadcast signal, is allocated. A multiplexing means having a broadcast signal logical channel, multiplexing the transmission time information logical channel, the broadcast signal logical channel, and other logical channels according to a reference signal and outputting a multiplexed signal; and a reference signal for operating the multiplexing means. Reference signal generating means for outputting, and a transmission signal output means for generating the physical channel from the multiplexed signal to generate a transmission signal, and outputting the transmission signal to a transmission path, wherein the broadcast data receiving apparatus includes: Receiving demodulation means for receiving a transmission signal and reproducing the multiplexed signal to output a reproduced multiplexed signal; A time information logical channel, the additional information data or the broadcast time information data, and the video signal or the audio signal are separated, and the reproduction transmission time information, the reproduction additional information data or the reproduction broadcast time information data, and the reproduction video signal, respectively. Or a separating means for outputting a reproduced audio signal, a reference signal reproducing means for reproducing a reproduction reference signal synchronized with the reference signal from an output signal of the separating means, and operating the separating means with the reproduced reference signal, and the broadcast Time acquisition means for acquiring either one of reception time information representing the current time on the data receiving device side, or delay information representing the difference between the reproduction transmission time information and the reception time information, and an output signal of the time acquisition means And the reproduction transmission time information, or the output signal of the time acquisition means, the reproduction transmission time information, and the reproduction broadcast time information. From the broadcast data, the reception time information, or broadcast delay information representing the difference between the broadcast time information data and the reception time information is calculated and obtained, and an arithmetic means for outputting the reception time information or the broadcast delay information; Time output generating means for generating video time information or audio time information for converting the reception time information into video or audio using the output signal of the arithmetic means and the reproduction additional information data, and the output of the arithmetic means Using the broadcast delay information that is a signal, and delaying the reproduced video signal or the reproduced audio signal, the video time information and the reproduced video signal from the time output generating means, or the audio time information and the A broadcast data transmission / reception system, comprising: delay synthesis means for synthesizing and outputting a reproduced audio signal. 28. The broadcast data transmitting / receiving system according to claim 27, wherein said transmission path is a cable television. 29. A broadcast data transmitting apparatus used in the broadcast data transmitting / receiving system according to claim 27, wherein transmission time information indicating a reference time on the broadcast data transmitting apparatus side is assigned. Channels and
In the data signal, additional information data used when the transmission time information is visualized or converted to audio in the broadcast data receiving device, or broadcast time information data representing a reference time of the broadcast signal is included. Multiplexing means having a broadcast signal logical channel to which the broadcast signal is assigned, multiplexing the transmission time information logical channel, the broadcast signal logical channel and other logical channels according to a reference signal, and outputting a multiplexed signal; Reference signal generating means for outputting a reference signal for operating the means, and transmission signal output means for generating the physical channel from the multiplexed signal to generate a transmission signal and outputting the transmission signal to a transmission path. A transmission device using a broadcast data transmission / reception system. 30. A broadcast data receiving apparatus used in the broadcast data transmission / reception system according to claim 27, wherein the reception demodulation receives the transmission signal, reproduces the multiplexed signal, and outputs a reproduced multiplexed signal. Means for separating the transmission time information logical channel, the additional information data or the broadcast time information data, and the video signal or the audio signal from the reproduction multiplexed signal, respectively, Separating means for outputting data or reproduced broadcast time information data, a reproduced video signal or a reproduced audio signal; reproducing a reproduction reference signal synchronized with the reference signal from an output signal of the separation means; Reference time reproducing means for operating the broadcast data receiving apparatus, reception time information indicating a current time on the broadcast data receiving apparatus side, or the reproduction Time acquisition means for acquiring any one of delay information representing a difference between the reception time information and the reception time information, an output signal of the time acquisition means and the reproduction transmission time information, or an output signal of the time acquisition means From the reproduction transmission time information and the reproduction broadcast time information data, the reception time information, or broadcast delay information representing the difference between the broadcast time information data and the reception time information is calculated and obtained, and the reception time information Or an arithmetic means for outputting the broadcast delay information, and generating video time information or audio time information for converting the reception time information into a video or audio using the output signal of the arithmetic means and the reproduction additional information data. Time output generating means, and using the broadcast delay information, which is an output signal of the arithmetic means, to delay the reproduced video signal or the reproduced audio signal, The reproduced video signal and the video time information from the time output generating means,
Alternatively, a receiving device using a broadcast data transmission / reception system, comprising: delay synthesizing means for synthesizing the audio time information and the reproduced audio signal and outputting the synthesized signal. 31. A receiving apparatus according to claim 30, wherein said time obtaining means receives a current time transmission signal including current time information transmitted on the same or different transmission path as said transmission path. A broadcast data transmitting / receiving system comprising: a transmission signal receiving unit; and a decoding unit that reproduces the current time information from an output signal from the current time transmission signal receiving unit and uses the current time information as the reception time information. Receiver. 32. The receiving device according to claim 31, wherein said another transmission path is a telephone line. 33. One logical channel is composed of a video signal, an audio signal, a data signal, or a composite signal thereof. At least one of the logical channels includes a data signal and a video signal, a data signal and an audio signal, or a data signal. One broadcast signal composed of a signal, a video signal, and an audio signal is allocated, and a plurality of logical channels are combined into one physical channel, and a broadcast data transmitting apparatus that transmits the physical channel unit and receives the broadcast data. In the broadcast data transmitting and receiving system having a broadcast data receiving device, the broadcast data transmitting device, in the data signal, additional information data used when the transmission time information is visualized or audio in the broadcast data receiving device, or One of the broadcast signals including broadcast time information data representing a reference time of the broadcast signal. A multiplexing means having a broadcast signal logical channel to which a transmission signal is assigned, multiplexing the broadcast signal logical channel and other logical channels according to a reference signal and outputting a multiplexed signal, and outputting a reference signal for operating the multiplexing means Reference signal generating means, a transmission signal output means for generating the physical channel from the multiplexed signal as a transmission signal, and outputting the transmission signal to a transmission path, and a reference time representing a reference time on the broadcast data transmitting apparatus side. A reference time information output unit for outputting as information, the reference signal and the reference time information are associated with each other as allocation information, and the reference time information at the time of the association is output as the transmission time information, and the allocation information is output. Allocating means for outputting the allocation information and the current time information as a time allocation transmission signal to the same or another transmission path as the transmission path; Receiving means for receiving the transmission signal, reproducing the multiplexed signal and outputting a reproduced multiplexed signal, and demodulating the broadcast data receiving apparatus. Separating the additional information data or the broadcast time information data from the video signal or the audio signal,
Separating means for outputting as playback additional information data or playback broadcast time information data, a playback video signal or playback audio signal, and playing back a playback reference signal synchronized with the reference signal from an output signal of the separation means, Reference signal reproducing means for operating the separating means, time-allocated transmission signal receiving means for receiving the time-allocated transmission signal, and reproducing the allocation information from the output signal of the time-allocated transmission signal receiving means as reproduction allocation information. Decoding means for reproducing the reference time information and outputting the reference time information as reception time information when the reference time information is reproduced; the reproduction assignment information from the decoding means; and the reproduction reference signal from the reference signal reproduction means. A time conversion unit that reproduces the transmission time information from and outputs the reproduction time information as reproduction transmission time information; Time information and the reproduction transmission time information from the time conversion means, or the reception time information from the decoding means and the reproduction transmission time information and the reproduction broadcast time information data from the time conversion means, the broadcast time Calculating means for calculating and calculating broadcast delay information representing a difference between the information data and the reception time information, and outputting the reception time information or the broadcast delay information; an output signal of the calculation means and the reproduction additional information data; A time output generating means for generating video time information or audio time information for converting the reception time information into video or audio, and using the broadcast delay information as an output signal of the arithmetic means, Signal or the reproduced audio signal, and the video time information and the reproduced video signal from the time output generating means or the audio Broadcast data transmission and reception system comprising: the delay combining means information and the reproduced audio signal synthesized by the output, the. 34. A broadcast data transmitting / receiving system according to claim 33, wherein said transmission path is a cable television. 35. A broadcast data transmitting apparatus used in the broadcast data transmitting / receiving system according to claim 33, wherein transmission time information is converted into video or audio in the broadcast data receiving apparatus in the data signal. A broadcast signal logical channel to which one of the broadcast signals is assigned, including additional information data to be used, or broadcast time information data representing a reference time of the broadcast signal, and the broadcast signal logical channel and the like. Multiplexing means for multiplexing the logical channels according to a reference signal and outputting a multiplexed signal, reference signal generating means for outputting a reference signal for operating the multiplexing means, and generating the physical channel from the multiplexed signal as a transmission signal, Transmission signal output means for outputting the transmission signal to a transmission path, and reference time information representing a reference time on the broadcast data transmission device side. A reference time information output unit that outputs the allocation information by associating the reference signal with the reference time information and assigning the reference time information as the transmission time information. Means for outputting and transmitting the allocation information and the current time information as a time allocation transmission signal to the same or another transmission path as the transmission path, and transmitting the time allocation transmission signal. A transmitting device that uses a transmitting and receiving system. 36. A broadcast data receiving apparatus used in the broadcast data transmission / reception system according to claim 33, wherein the reception demodulation receives the transmission signal, reproduces the multiplex signal, and outputs a reproduction multiplex signal. Means for separating the additional information data or the broadcast time information data and the video signal or the audio signal from the reproduced multiplexed signal,
Separating means for outputting as playback additional information data or playback broadcast time information data, a playback video signal or playback audio signal, and playing back a playback reference signal synchronized with the reference signal from an output signal of the separation means, Reference signal reproducing means for operating the separating means, time-allocated transmission signal receiving means for receiving the time-allocated transmission signal, and reproducing the allocation information from the output signal of the time-allocated transmission signal receiving means as reproduction allocation information. Decoding means for reproducing the reference time information and outputting the reference time information as reception time information when the reference time information is reproduced; the reproduction assignment information from the decoding means; and the reproduction reference signal from the reference signal reproduction means. A time conversion unit that reproduces the transmission time information from and outputs the reproduction time information as reproduction transmission time information; Time information and the reproduction transmission time information from the time conversion means, or the reception time information from the decoding means and the reproduction transmission time information and the reproduction broadcast time information data from the time conversion means, the broadcast time Calculating means for calculating and calculating broadcast delay information representing a difference between the information data and the reception time information, and outputting the reception time information or the broadcast delay information; an output signal of the calculation means and the reproduction additional information data; A time output generating means for generating video time information or audio time information for converting the reception time information into video or audio, and using the broadcast delay information as an output signal of the arithmetic means, Signal or the reproduced audio signal, and the video time information and the reproduced video signal from the time output generating means or the audio Information and the reception apparatus using the broadcast data transmission and reception system comprising: the delay synthesizing means for reproducing speech signals synthesized and output, a. 37. The broadcast data transmission / reception system according to claim 33, wherein said another transmission path is a telephone line. 38. The transmitting apparatus according to claim 35, wherein said another transmission path is a telephone line. 39. The receiving apparatus according to claim 36, wherein said another transmission path is a telephone line. 40. A broadcast data receiving apparatus for receiving a multiplexed signal to be transmitted, comprising: separating means for separating first data relating to video data, audio data and time from the multiplexed signal; Acquisition means for acquiring the data of the second time, and computing means for computing the information on the reception time from the first data on the time and the second data on the time. A broadcast data receiving system for synthesizing and displaying a video based on the video data or an audio based on the audio data. 41. A broadcast data receiving apparatus for receiving a multiplexed signal to be transmitted, comprising: separating means for separating video data, audio data and first data relating to time from the multiplexed signal; Acquisition means for acquiring the data of the second time, and computing means for computing the information on the reception time from the first data on the time and the second data on the time, and the video based on the information on the reception time. A broadcast data receiving system for delaying and outputting a video based on data or an audio based on the audio data.