JP3157065B2 - Multi-channel broadcast transmission / reception system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast transmitting and receiving system for transmitting and receiving signals such as audio, video and data in a moving body such as a car.

[0002]

2. Description of the Related Art In a mobile body such as a car, a transmission / reception system for multi-channel broadcasting for multiplexing and broadcasting a plurality of signals such as audio, video and data has been studied. For example,
As a transmission / reception system for audio broadcasting multi-channel broadcasting, IEE Transaction on Consumer Electronics, Vol. 35, No. 3, pp. 504 to 511, August 1989 (IEEE Transac)
Tion on Cosmer Electroni
cs Vol. 35 No. 3 504-511p, A
August 1989) shows one such method. It describes that a part of the signal is used to transmit a genre code or program of the program content.

[0003]

However, in the above-mentioned prior art, the genre code information of the program contents is encoded and added to a part of the reception channel. The content is unknown. For this reason, it is necessary to select the program information after viewing it in order to search for the desired program information. Particularly, in the case of a mobile body such as a car in which simple and quick operation is desired, the repeated channel selection instruction operation is troublesome and inconvenient. is there. In addition, a broadcast of a certain program and a broadcast of a counterprogram cannot be selected at the same time, so that a request to view both programs cannot be satisfied. Furthermore, there is a problem that not only the genre coding of the program contents but also information for convenience of viewing and listening is insufficient.

[0004] It is an object of the present invention to solve these problems and to provide a transmission / reception system of a multi-channel broadcast capable of setting a variety of viewing environments.

[0005]

In order to solve this problem,
Encoding means for encoding channel broadcast signals of a plurality of broadcast programs; multiplexing means for multiplexing the channel broadcast signals encoded by the encoding means; and channel broadcast signals multiplexed by the multiplexing means A transmitter that modulates the signal into a transmission signal; a transmitter that transmits a transmission signal modulated by the modulation unit; a demodulation unit that receives and demodulates the transmission signal; Decoding means for decoding the received signal, and a receiver comprising a broadcast output means for outputting a channel broadcast signal decoded by the decoding means, a multi-channel broadcast transmission and reception system, wherein the transmitter, the transmitter, An adding unit for adding classification information relating to a plurality of broadcast programs, wherein the receiver separates the reception signal decoded by the decoding unit into the plurality of broadcast programs and the classification information; A storage unit that stores the plurality of channel broadcast signals and the classification information; a classification information output unit that outputs the classification information; an operation unit that receives a channel selection instruction of the channel broadcast signal; Control means for controlling output of the designated channel broadcast signal from the broadcast output means.

[0006] The adding means outputs the classification information,
The encoding unit further encodes the classification information from the adding unit, the multiplexing unit multiplexes the plurality of channel broadcast signals encoded by the encoding unit with the classification information, and the modulation unit The multiplexed plurality of channel broadcast signals and the classification information are modulated to form a transmission signal.

[0007] Further, as the classification information, for each of the broadcast programs, a broadcast language, a broadcast genre, a song title, a singer name, a broadcast time, a broadcast start / end time, viewing environment setting information, information as to whether or not the broadcast is a pay broadcast, and , May include at least one of information on whether a contract is necessary or not. Thereby, the classification information output means can output such information.

The classification information output means allocates identification information for each of the broadcast programs, adds the classification information together with the classification information and outputs the classification information, the operation means receives the identification information, and the control means It is possible to control to output from the storage means a channel broadcast signal of a broadcast program corresponding to the identification information received by the operation means.

[0009] The operation means may include an instruction for selecting the broadcast genre, an instruction for selecting whether to select the pay broadcast, and an instruction for selecting whether to select a broadcast requiring the contract. At least one of
The control means may control to output a channel broadcast signal of a broadcast program corresponding to the selection instruction received by the operation means from the storage means.

[0010] Furthermore, an external environment setting device for adjusting the temperature is provided, and the operation means can receive at least an instruction to select whether or not to set the viewing environment setting. When there is a selection instruction to set the viewing environment accepted by the means, the sound quality, reverberation, level balance between output terminals of the channel broadcast signal of the broadcast program to be output correspond to the viewing environment setting information, Temperature regulation can be controlled.

Further, when the content of the broadcast program accompanies music output as the classification information, it further indicates that the accompaniment and the singer's voice are separable broadcasts, and the operation means separates the separable broadcast. And a selection instruction to output either of the accompaniment and the singer's voice in the case of separation can be received at least, and the control unit according to the selection instruction received by the operation unit. , The broadcast program can be output.

[0012]

In the transmitter, channel broadcast signals of a plurality of broadcast programs are input and set as signal sources, and classification information on the plurality of broadcast programs is input and set to an adding means.
The encoding unit encodes the channel broadcast signals of the plurality of broadcast programs and the classification information from the adding unit. The multiplexing unit multiplexes the plurality of channel broadcast signals and the classification information encoded by the encoding unit, and the modulation unit modulates the multiplexed channel broadcast signals and the classification information. As a transmission signal. The transmitting means transmits the modulated transmission signal.

In the receiver, the demodulation means receives and demodulates the transmission signal, and the decoding means decodes the reception signal demodulated by the demodulation means. The separating unit separates the received signal decoded by the decoding unit into the plurality of broadcast programs and the classification information. Further, the storage unit stores the plurality of channel broadcast signals and the classification information. The classification information output means outputs the classification information. As an output method, display output can be performed on display means. The operation means receives a channel selection instruction of the channel broadcast signal from a viewer, and the control means controls the channel output signal specified by the operation means to be output from the broadcast output means. Thus, the broadcast output means can output the designated channel broadcast signal. That is, since the information signals are accumulated and stored after receiving and demodulating the multi-channel broadcast, it is possible to collect the broadcast information of a plurality of channels at a time. Specific channel broadcast information from a plurality of channel broadcasts can be immediately output by sound, display, or the like.

The classification information includes, for each of the broadcast programs, a broadcast language, a broadcast genre, a song name, a singer name, a broadcast time, a broadcast start / end time, viewing environment setting information, information as to whether or not the broadcast is a pay broadcast, and Since at least one of the information indicating whether or not a contract is required is included, it is possible to include various types of contents sufficient for providing convenience for viewing, and to output such classification information from the classification information output means.

[0015] Further, the operation means includes an instruction for selecting the broadcast genre, an instruction for selecting whether to select the pay broadcast, and an instruction for selecting whether to select the broadcast requiring the contract. If at least one of them can be received, the control means can control to output from the storage means a channel broadcast signal of a broadcast program corresponding to the selection instruction received by the operation means. .

In a case where the apparatus further comprises an external environment setting device for performing temperature control, the operation means can receive at least an instruction to select whether or not to set the viewing environment setting, and the control means When there is a selection instruction for setting the viewing environment received by the operation means, the sound quality, reverberation, level balance between output terminals, and the external environment correspond to the viewing environment setting information, and correspond to the viewing environment setting information. The temperature control of the setting device can be controlled.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1, FIG. 2, FIG. 3, and FIG. 4 are diagrams relating to a transmission / reception system according to a first embodiment of the present invention. FIG.
FIG. 3 is a block diagram of a transmitter part of the broadcast transmission / reception system according to the first embodiment of the present invention. FIG. 2 is an explanatory diagram showing a frequency multiplexing state of the present invention. FIG. 3 is a frame configuration diagram showing a time-multiplexed state of the encoded signal. FIG. 4 shows a block diagram of a high-frequency signal processing circuit portion of the receiving section.

In FIG. 1, 10-1 (Ch1), 10-1 (Ch1)
-2 (Ch2), 10-3 (Ch3), 10-4 (Ch
4) shows four broadcast signal sources (hereinafter, referred to as source programs) (only four programs are described for convenience of explanation, but more signal sources can be multiplexed). The source program pre-stores information such as audio and video that are broadcast program contents, or
External information can be input. 15 is 10
-1, 10-2, 10-3, and 10-4 are additional information signal sources (Ch5) of source programs. Identification information predetermined according to the program contents of the source programs is specified. Constitute an independent channel. The additional information signal source 15 can include an input unit that receives designation of identification information. Further, the additional information signal source 15 includes an adding unit that adds classification information regarding a plurality of broadcast programs. 30-1, 30-2, 30-
Reference numerals 3, 30-4 and 30-5 denote encoding circuits, which perform signal processing such as A / D converters and encoding for making discrete digital data. 50-1, 50-
Reference numerals 2, 50-3, 50-4, and 50-5 denote multiplexing circuits that rearrange the signals from the encoding circuit 30 in time series and perform multiplexing processing. Reference numeral 55 denotes a multiplex conversion circuit which performs an inverse Fourier transform (IFT: In
verse Fast Fourier Transform). Reference numeral 61 denotes an imaginary part signal processing circuit which converts a signal of only the imaginary part signal (Im.) From the frequency multiplexing conversion circuit 55 into a digital-analog (D / A) signal. 62 is a real part signal processing circuit, and the real part signal (Re.) From the multiplex modulation circuit 55.
Only the signal is converted into a digital-analog (D / A) signal. 66 is a transmission signal amplifying circuit, which amplifies the transmission signal. A carrier signal source 63 outputs a carrier having a predetermined frequency. Numerals 64 and 65 are frequency conversion circuits for mixing a carrier wave from a carrier signal source and a broadcast signal from the imaginary part signal processing circuit 61 or the real part signal processing circuit 62. Reference numeral 67 denotes a combining circuit, which combines the imaginary part and the real part of the broadcast signal. Reference numeral 68 denotes a 90 ° phase shifter for the carrier frequency signal, which shifts the phase of the carrier from the carrier signal source by 90 °. A transmission signal output terminal 70 outputs a transmission signal. 80 is a transmitting antenna.

In the transmitter shown in FIG. 1, each source program performs an encoding signal process such as discrete data conversion by A / D conversion and error correction in an encoding circuit 30. After that, a multiplexing circuit 50 adds a synchronization signal, data control information, a signal sequence recognition code, and the like, and converts the signals into a plurality of parallel frame-structured signals for multiplexing. A signal sequence from these multiplexing circuits 50 is converted
After the multiplex conversion into the frequency domain signal (after the IFT conversion), the multiplex conversion signal is separated into an imaginary part signal (Im.) And a real part signal (Re.), And the respective signals are processed by the signal processing circuits 61 and 62. Digital-analog (D / A) signal conversion. Further, these signals are orthogonally modulated by frequency conversion circuits 64 and 65 and a synthesis circuit 67 using a carrier signal from a carrier signal source 66 and a carrier signal orthogonal by a phase shifter 68. Thus, OFDM modulation (Orthogonal Frequency Multiplexing Modula)
tion). Further, the signal is amplified by the transmission signal amplifying circuit 66 to output a broadcast signal. As additional information,
For each program, there is information such as program, language, start time, end time, presence / absence of environment setting, presence / absence of pay broadcasting, and the like. For example, the program is set in advance such that the program is news, the language is Japan, the start time is 10:00 AM, the end time is 10:10 AM, there is no environment setting, and there is no pay broadcast. FIG. 9 shows a specific bit pattern for identifying a program category. FIG.
As shown in, types of programs include information, news,
There are culture, entertainment, classical music, western music, Japanese music, popular songs, etc., and identification information corresponding to these is determined in advance.

The OFDM modulation operation of these broadcast signals is mainly performed by the inverse Fourier transform operation in the multiplex conversion circuit 55. FIG. 2 shows OFDM in the embodiment of the present invention.
The state of modulated frequency multiplexing is schematically shown. In FIG. 2, f1, f2,... F25 are multiplex signal carriers, and each carrier differs by a frequency Δf. In the source program Ch1, orthogonal frequency multiplex modulation is performed regularly every five carriers, such as f1, f6, f11, f16, and f21. As shown in FIG. 2, in the multiplexing circuit 50-1, the signal sequence is converted into a 5-line signal sequence, and the entire multiplexing circuit is converted into a 5 * 5 = 25 signal sequence. The lengths (Ts) of one symbol for code-modulating these signal sequences are all equal, and the multiplex modulation circuit 5 is regularly arranged.
5 (IFT conversion circuit). The time-sequential signal in the time domain becomes a signal in the frequency domain composed of a plurality of carrier signals having an equal frequency arrangement interval (1 / Ts) due to the IFT conversion and having an orthogonal relationship with each other in principle without interference.

FIG. 3 further shows a frame configuration in a state of time multiplexing of a signal sequence for each carrier signal. A frame is composed of a superframe group 400 forming the highest order data group, and a lower block code. It is composed of a basic frame group 401 and the like. For each basic frame of data of each source program (Ch1 to Ch4) and additional information signal source (Ch5), a carrier wave 301 (f1).
0 (f25) is assigned, and these are combined and transmitted simultaneously as a broadcast signal. In the case of the carrier 301 (f1−source program Ch1), the basic frame 401 includes a synchronization header section 500, a code control section 501 including an error detection code of a signal data string, and a data information section including control information of a transmission code data string. 502 and an encoded information signal sequence 503 that is information of a broadcast signal. Here, the meaning of (Chn-mk) in the encoded information signal sequence is such that n indicates a source program name, m indicates a data block number of the signal sequence of each frame, and k indicates a carrier group. The carrier groups are assigned group numbers such that the carriers 301 (f1) to 305 (f5) are the first group, and the carriers 306 (f6) to (f10) are the second group. The encoded information is divided into blocks of a predetermined length. In this example, the number increases or decreases (mod = 5) every five carriers. The synchronization header section 500 includes an unmodulated synchronization signal.

Next, the configuration of the receiver will be described.
FIG. 4 shows a block diagram of a high-frequency signal processing circuit portion of the receiving section. In FIG. 4, reference numeral 106 denotes a receiving antenna, 1
A reception signal input terminal 05 receives a reception signal received by a reception antenna. Reference numeral 110 denotes a high-frequency signal processing circuit that performs signal processing for demodulating a received signal. The high-frequency signal processing circuit 110 includes a variable amplifier 117, a distributor 116, a frequency converter 114/115, a local oscillation signal source 120, a 90 ° phase shifter 124, and an A / D converter 112/1.
13, reference signal oscillator 121, PLL frequency control circuit 1
22, carrier detection circuit 118, time base circuit 11
9, control circuit 123 for signal frequency and the like, Fourier transform circuit (FFT: Fast Fourier Transform) 111, and
It has a decode circuit 125-1 / 125-2. The variable amplifier 117 can change the amplification degree, and amplifies the received signal based on the indicated amplification degree. Divider 116 distributes and outputs this signal to frequency converters 114 and 115. Local oscillation signal source 120 outputs a local oscillation signal of a designated frequency. The 90 ° phase shifter 124 shifts the phase of the local oscillation signal from the local oscillation signal source 120 by 90 °. The frequency converters 114/115 mix the received signal with the local oscillation signal from the local oscillation signal source 120 or the shifted local oscillation signal from the 90 ° phase shifter 124 and convert them to intermediate frequencies, respectively. A / D converter 112/11
3 converts the received signal into an analog-digital (A / D) signal. Reference signal oscillator 121 emits a reference signal at the receiver. PLL frequency control circuit 122 controls the oscillation frequency of local oscillation signal source 120 based on a reference signal from a reference signal oscillator. Carrier regeneration circuit 11
8 finely adjusts the frequency of the local oscillation signal source 120 using a carrier detection signal that has detected a carrier (the adjustment path is not shown). The carrier reproducing circuit 118 controls the amplification degree of the variable amplifier 117 by utilizing the fact that the carrier detection signal is substantially equal to the amplitude information. The timebase circuit 119 performs signal synchronization correction by referring to the carrier detection signal from the carrier reproduction circuit 118 and the control code after decoding of the decoding circuit 125-1. A signal synchronized with the time slot specified.
The control circuit 123 instructs the PLL frequency control circuit 122 and the timebase circuit 119 to select a received signal in accordance with a selection instruction from an input unit that receives a selection instruction of a desired selection channel. Fourier transform circuit (FF
T: Fast Fourier Transform) 111 performs Fourier transform on the received signal. Decoded circuit 125-1 / 125-2
Decodes the encoded information.

In FIG. 4, the receiving unit 1
06 and the broadcast signal received at the received signal input terminal 105 are amplified by the variable amplifier 117 at high frequency. Control circuit 123
Then, P is controlled by a control signal corresponding to the desired selection channel.
The LL frequency control circuit 122 sets the oscillation frequency of the local oscillation signal source 120 to a predetermined frequency. Frequency converter 1
At 14 and 115, orthogonal frequency conversion is performed using the local oscillation signal. After the orthogonal frequency conversion, the converted signal is converted into discrete digital data by A / D circuits 112/113. The FFT transform circuit 111 performs a Fourier transform, and transforms the signal subjected to the inverse Fourier transform by the multiplex transform circuit 55 of the transmitter shown in FIG. 1 into the original time-domain signal sequence. Based on the amplitude information from the carrier reproducing circuit 118, the amplification degree of the variable amplifier 117 is variably set as appropriate, and the signal amplification level corresponding to the signal level is adjusted. At this time, the receiving section can demodulate the carrier signal at a specific frequency interval and obtain a demodulated signal corresponding to each source program. In the present embodiment, when the source program Ch1 is selected as the carrier frequency signal sequence, the carrier signals f1, f6, f11, f16 and f21 are demodulated, and the additional information program is always set to f1.
The carrier signals of 5, f10, f15, f20 and f25 are respectively subjected to FFT transform (partial FFT transform: frequency thinning-out FFT transform). Further, all carrier frequency signal sequences that are not selected may be demodulated. Partial FFT according to this desired selection channel
The following operation is performed to perform the conversion. In the timebase circuit 119, the synchronous header 5 of each signal
The signal is referred to by referring to the carrier detection signal from the carrier reproducing circuit 118 using the unmodulated synchronization signal or the like added to 00 and the like and the decoded control code of the decoding circuit 125-1. Perform synchronization correction. Using the corrected reference synchronizing signal, a timing slot of the FFT is set from the control circuit 123 according to the desired selected channel. Using the corrected timing slot corresponding to the desired selected channel, the Fourier transform circuit 111 decodes each signal subjected to the partial FFT transform into a decode circuit 125 for a source program (Ch1 to Ch4).
-1 and the additional information program (Ch5) decode circuit 125-2. In the decoded circuit,
The input signal is decoded to obtain a source program decoded signal and an additional information program decoded signal. By the above operation, the source program decoded signal and the additional information program decoded signal of the received signal can be output.

Next, the block configuration of the receiving side will be described with reference to FIG. FIG. 5 shows a block diagram of the entire receiving apparatus.

In FIG. 5, reference numeral 155 denotes a receiving unit;
This is the same as the circuit block shown in FIG. 141 is a receiving antenna, and 142 is a high-frequency signal processing and demodulating circuit, which performs signal processing for demodulating a received signal as described above. Reference numeral 143 denotes a program selection circuit, which corresponds to the above-described Fourier transform circuit, and is a separation unit that selects and outputs a channel specified and selected and separates an additional information program. Reference numeral 144 denotes a signal processing circuit, which corresponds to the decoding circuit 125 described above. An output control signal processing circuit 145 performs signal processing such as reverberation and sound quality.
Reference numeral 150 denotes a storage device that stores a source program decoded signal and a side information program decoded signal of the received signal. An input / output interface 147 is an interface circuit for connecting to an output terminal via a transmission line. Reference numeral 148 denotes a genre / environment etc. menu signal processing circuit, which inputs an additional information decoded signal and extracts additional information such as genre / environment. Reference numeral 149 denotes a control circuit of the receiving device, which includes an output control signal processing circuit 145, a storage device 14
6. It controls the input / output interface 147 and the menu signal processing circuit 148 such as genre / environment. Further, the control circuit 149 may have the function of the control circuit 123 described above. Reference numeral 150 denotes an output-side input / output interface, which is an interface circuit for connecting to a receiving unit via a transmission path. Reference numeral 151 denotes an output device, which includes a display for outputting video information, a speaker for outputting audio information, and the like. An operation display unit 152 includes an operation unit for receiving a channel selection instruction and the like and a display unit for displaying program information. The operation display unit may receive a selection instruction by operating on a screen such as a touch panel. The display unit is also a classification information output unit that outputs the classification information.
Reference numeral 153 denotes an auxiliary output device that has the same function as the output device 151 and displays karaoke lyrics as an image display device. That is, a plurality of output devices can be provided as output devices. Reference numeral 154 denotes an external environment setting device. For example, when an external device such as an air conditioner is provided, an instruction for controlling the external device can be received. In addition, the external environment setting device 154
The receiving environment can be automatically set to the set viewing environment temperature of the received broadcast signal.

FIG. 6 shows an example of the operation display section 152. A display unit 171 for displaying and outputting additional information;
An operation unit 179 receives a channel selection instruction and the like. An example in which the display unit 171 displays the content of the additional information of the received broadcast is shown. Reference numeral 172 denotes a reservation code of identification information assigned each time a reservation is made. 173 is
This is the program name and indicates the program contents of the channel. 17
4 is an output language. 175 indicates the start time of the program, and 176 indicates the end time of the program. 177
Indicates whether the viewing environment setting information is set,
According to the environment setting information added to the program. In the environment setting, when the viewing sound field environment that matches the genre of broadcasting is set as the environment setting, for example, in the case of a broadcast program such as music, it is set so that it is easy to view in an environment such as a music hall Has an environment setting. 178 indicates whether the program is a pay broadcast or not, and whether the program is a pay broadcast or a broadcast requiring a contract. The operation keys provided on the operation unit 179 will be described. Reference numeral 188 denotes an operation key for entry, which instructs setting confirmation registration of each switch. 180 is a key for switching between a reservation instruction and a CH instruction. Reference numeral 181 denotes a genre selection key for selectively switching a genre to be selected by pressing the key. For example, a currently broadcast program corresponding to a predetermined genre such as NEWS or POPS is sequentially switched by pressing a key. A broadcast program of the genre selected by the genre selection key can be selected. When the user wants to select a channel, the user presses the entry key 188 to give an instruction. Reference numeral 182 denotes an environment setting key. By pressing the environment setting key 182, a channel having the environment setting 177 on the display unit is selected, and setting is performed in accordance with the environment setting. When there is no environment setting, and when the environment setting key 182 is not set, the sound field environment of the normal mode is set. 183 is a PAY / Non key,
If there is a pay broadcast 178 on the display unit, if the user wants to view the broadcast, the pay is paid and the pay is set. If not, the pay is set to NON. 184
Can be displayed on the right side of the display unit 171 by pressing the OTHER key when it is desired to display the name of a song or a singer that is being broadcast in a broadcast program. Press again to clear the display. 185 is A ~
D is a character key, and 186 is a numeric key of 1 to 9, and A01 of the reservation code 172 displayed on the display unit.
When the entry key 188 is depressed after specifying the program or B02, the broadcast program of the code can be selected. When A01 or B02 of the reservation code 172 is designated, the display section 171 may blink the code column. 187 is a karaoke mode changeover switch,
By pressing the switch, it is possible to switch whether or not to enter the karaoke mode. What is karaoke mode?
In a broadcast program such as music, this mode separates the singing voice from the accompaniment and outputs only the accompaniment. In the present embodiment, the singing voice and the accompaniment can be separated by the control circuit instructing the storage device 146 in the karaoke mode, and only the accompaniment can be output.

The operation unit 179 is used to key the viewer's request.
A command is input by an operation. First, a reservation / c
After declaring an input command by pressing the h180 key,
After entering each information of 80 to 188, ENT188
Press the key to confirm and register the command input. In FIG.
A description will be given by taking A01 of the reservation code 172 as an example. When the receiver of the broadcast transmission / reception system is started, the additional information of the currently receivable broadcast program is displayed on the display unit 171. For example, in the case of A01 of the reservation code 172, the program 17
3 for news, language 174 for Japan, start time 175 for A
M10: 00, end 176 is displayed as AM10: 10, environment setting 177 is not displayed, and pay broadcast 178 is not displayed.
The reservation codes can be arbitrarily assigned in the order of display and stored in the storage device 146. When the assigned reservation code is accepted after the reservation / ch180 key is pressed, the broadcast program assigned to the reservation code is accepted. Is output as audio.

Next, with reference to FIG. 8, a flow from the operation instruction to the output in FIG. 5 will be described for the processing operation, display and output operation in the receiver.

In FIG. 5, in the receiving section 155, the radio wave received by the antenna 141 is demodulated by the high frequency signal processing and demodulating circuit 142 into each source program and additional information, as described above. The program selection circuit 143 outputs the demodulated source programs to the signal processing circuit 144 and selects the genre / environment etc. menu signal processing circuit 148 to output additional information. In the program selection circuit 143, as shown in FIG. 3, since the time series between each source program and the additional information is different, the output destination is switched according to the time slot.

The signal processing circuit 144 decodes information of each source program and outputs an audio signal. The genre / environment menu signal processing circuit 148 separates the additional information into information on the broadcast language, broadcast genre, song title, singer name, broadcast time, broadcast start / end time, viewing environment, presence / absence of pay broadcast, and contract contents. To decode. That is, a signal of additional information other than voice is output. Signal processing circuit 14
After decoding in step 4, the output control signal processing circuit 145 performs signal processing of sound such as reverberation and sound quality. Storage device 146
Stores the audio signal of each signal-processed source program and additional information to be displayed and output. The storage device 146, the output control signal processing circuit 145, and the genre / environment menu signal processing circuit 148 include the control circuit 1
49 are respectively controlled. A plurality of reception and demodulation paths from the antenna 141 to the storage device 146 can be formed by the configuration of the present embodiment.

The control command to the control circuit 149 is as shown in FIG.
As shown in (1), the operation display unit 152 receives the content operated by the viewer (S801). I / O interface 1
Reference numeral 50 denotes the input / output interface 1
47 (S802). The input / output interface 147 outputs the transmitted operation content to the control circuit 149 (S803). The control circuit 149 controls the storage device 14
The operation contents are analyzed with reference to the reservation code and the like stored in No. 6 (S804). The control circuit 149 instructs the program selection circuit 143 to set a reception frequency and a timing slot and to selectively receive (S805) according to the analysis result. If the channel is not instructed, it instructs to receive all source programs. Further, the control circuit 149 instructs the genre / environment menu signal processing circuit 148, the signal processing circuit 144, the storage device 146, and the output control signal processing circuit 145 to perform the respective processes as described above. (S806, S807, S808 and S80
9). The audio signal of the source program among the stored contents stored in the storage device 146 is output according to an instruction from the control circuit 149, and is input to the output device 151 via the input / output interface 147 and the input / output interface 150 (S809, S810) And S811). The output device 151 outputs audio signals such as narration, singing voice, music, and karaoke accompaniment (S813). Operation display section 15
2 is an input / output interface 147 from the storage device 146
The additional information for display via the steps 150 and 150 is fetched and output and displayed (S812). The operation display unit 152
At the same time, instructions such as program selection, sound quality setting, volume setting, environment setting, and whether to separately broadcast one or both of the singer and the accompaniment at the time of karaoke and the like are received by the viewer's operation input. The operation display unit 152 outputs the received instruction, and controls the control circuit 149 via the input / output interface 150 and the input / output interface 147.
To be transmitted. The control circuit 149 analyzes the received instruction and instructs and controls each block as described above.

Next, a display example in the karaoke mode is shown in FIG.
This will be described with reference to FIG. FIG. 7 shows an example of the display operation unit in the karaoke mode. In FIG. 7, reference numeral 171 denotes a display unit;
Reference numeral 179 denotes an operation unit. The display contents of the display unit 171 include a karaoke mode display 191, a song name 192, and a playing time 19.
3, singer name 194 and lyrics 195. When the karaoke mode changeover switch 187 is pressed, the karaoke mode is set, and the display is made as shown in FIG. Operation unit 17
9 is the same as FIG. Also, karaoke lyrics can be displayed on the auxiliary image display device of the auxiliary output device 153.

As described above, information relating to the classification of program contents is multiplexed and transmitted, and the receiver side demodulates the received data, stores and stores the received content, and displays the received content. Information can be output immediately by voice or display. In addition, the information includes audio content, viewing environment, presence / absence of pay broadcasting, and the like in addition to the classification of the broadcast content and the program, and is sufficient in many types. In addition, since a plurality of broadcast programs can be stored in the storage device, after viewing a program in a certain time zone, it is possible to subsequently watch a back program in the same time zone.

[0035]

According to the present invention, it is possible to provide a diverse viewing environment in a multi-channel broadcast transmission / reception system.

[Brief description of the drawings]

FIG. 1 is a block diagram of a transmitter.

FIG. 2 is an explanatory diagram showing a frequency multiplexing state.

FIG. 3 is a frame configuration diagram showing a time-multiplexed state of an encoded signal.

FIG. 4 is a block diagram of a high-frequency signal processing circuit portion of the receiver.

FIG. 5 is a block diagram of a receiver.

FIG. 6 is a configuration diagram of a normal display unit and an operation unit.

FIG. 7 is a configuration diagram of a display unit and an operation unit during karaoke.

FIG. 8 is a flowchart from an operation instruction to output.

FIG. 9 is an explanatory diagram of a bit pattern for identifying a category.

[Explanation of symbols]

10-1 ... signal source, 30-1 ... encoding circuit, 50-1 ...
Multiplexing circuit, 55: IFT, 401: basic frame group,
110: High frequency signal processing demodulation circuit, 145: Output control signal processing circuit, 146: Storage device, 148: Menu signal processing circuit for genre / environment, etc. 149: Control circuit, 152
.., Operation display unit, 171, display unit, 179, operation unit.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Keiro Shinkawa 1-5-1, Marunouchi, Chiyoda-ku, Tokyo Research and Development Center, Hitachi, Ltd. (72) Inventor Kazuhiro Tasaka 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Address: AV Equipment Division, Hitachi, Ltd. (72) Inventor Satoshi Shindo 4-6-6 Kanda Surugadai, Chiyoda-ku, Tokyo Inside Hitachi, Ltd. (72) Toshio Nagashima 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Japan Shares (72) Inventor Miharu Yuki 2-4999-1 Hironodai, Zama-shi, Kanagawa Prefecture Xanavi Informatics, Inc. (72) Norio Nagai 2-4991 Hironodai, Zama-shi, Kanagawa Prefecture, Inc. Xanavi Informatics (56) Open flat 1-106534 (JP, A) (58 ) investigated the field (Int.Cl. ^7, DB name) H04H 1/00 H04N 7/00 - 7/173

Claims (7)

(57) [Claims] An encoding means for encoding channel broadcast signals of a plurality of broadcast programs, a multiplexing means for multiplexing the channel broadcast signals encoded by the encoding means, and a multiplexing means for the multiplexing means. A modulating means for modulating the channel broadcast signal to a transmission signal, a transmitter comprising a transmitting means for transmitting the transmission signal modulated by the modulating means, a demodulation means for receiving and demodulating the transmission signal, A multi-channel broadcast transmission / reception system, comprising: a decoding unit that decodes a reception signal demodulated by a demodulation unit; and a receiver including a broadcast output unit that outputs a channel broadcast signal decoded by the decoding unit. The transmitter includes additional means for adding classification information relating to the content of each of the plurality of broadcast programs multiplexed to the channel broadcast signal, and the transmitter includes all the multiplexed broadcast programs. And multiplexing the broadcast information together with the plurality of broadcast programs into the channel broadcast signal as one program, wherein the receiver converts the received signal decoded by the decoding unit into the plurality of broadcast programs. Separation means for separating a broadcast program and a program of the classification information; storage means for storing the separated plurality of broadcast programs and the program of the classification information; and a classification for displaying the stored classification information Information output means and the table
Operation means for receiving an instruction for selecting one broadcast program from among a plurality of broadcast programs has been the multiplexed corresponding to indicate classification information, said storage instruction broadcast program in the manipulation means Control means for reading out from the means and controlling to output from the broadcast output means. 2. The transmission / reception system for multi-channel broadcasting according to claim 1, wherein the classification information includes, for each broadcast program, a broadcast language, a broadcast genre, a song title, a singer name, a broadcast time, a broadcast start / end time, and a viewing / listening time. A multi-channel broadcast transmission / reception system comprising at least one of environment setting information, information on whether or not a pay broadcast, and information on whether or not a contract is necessary. 3. The multi-channel broadcast transmitting / receiving system according to claim 2, wherein said classification information output means allocates identification information for each of said broadcast programs, and adds and displays said identification information together with said classification information. Wherein the operation means receives the identification information, and the control means controls to output a decoded signal of a broadcast program corresponding to the identification information received by the operation means from the storage means. Channel broadcast transmission / reception system. 4. The transmission / reception system of a multi-channel broadcast according to claim 2, wherein the operation means includes an instruction to select the broadcast genre, an instruction to select whether or not to select the pay broadcast, and The control means can receive at least one of selection instructions as to whether or not to tune to a required broadcast, and the control means stores a decoded signal of a broadcast program corresponding to the selection instruction received by the operation means in the storage means. A transmission / reception system for multi-channel broadcasting, characterized in that the transmission / reception is controlled so as to be output. 5. The transmission / reception system for multi-channel broadcasting according to claim 2, further comprising an external environment setting device for adjusting a temperature, wherein said operation means selects whether or not to set said viewing environment setting. At least an instruction can be received. The control unit, when receiving a selection instruction to set the viewing environment received by the operation unit, corresponds to the viewing environment setting information and outputs a sound quality of a channel broadcast signal of a broadcast program to be output. , Reverberation, level balance between output terminals, and temperature control of the external environment setting device. 6. The multi-channel broadcast transmission / reception system according to claim 2, further comprising: when the content of the broadcast program is accompanied by music output, the accompaniment and the singer voice are separable broadcasts. The operation means can receive at least a selection instruction of whether or not to separate the separable broadcast and, in the case of separation, a selection instruction of which of an accompaniment and a singer voice to output, The transmission / reception system of a multi-channel broadcast, wherein the control means outputs the broadcast program in accordance with a selection instruction received by the operation means. 7. A demodulation means for receiving and demodulating a transmission signal,
Reception used in a transmission / reception system of a multi-channel broadcast signal, comprising: decoding means for decoding a reception signal demodulated by the demodulation means; and broadcast output means for outputting a broadcast program of the reception signal decoded by the decoding means. Separating a plurality of broadcast programs multiplexed into the received signal decoded by the decoding means and a program summarizing classification information relating to the contents of each of the multiplexed broadcast programs. separating means and a storage means for storing the program of the the separated plurality of broadcast programs the classification information, the classification information output means for displaying the classification information is the storage, the display classification information Operating means for receiving an instruction for selecting one broadcast program from the plurality of broadcast programs corresponding to the broadcast program; and storing the broadcast program specified by the operating means from the storage means.
Control means for controlling so as to read out and output from the broadcast output means.