JP2910885B2 - TV receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a television (hereinafter referred to as "television").
(Called "TV").

[0002]

2. Description of the Related Art FIG. 5 is a block diagram of a conventional audio multiplex TV receiver, wherein 1 is an antenna, 2 is a TV receiver tuner section, 3 is a video signal processing section, 4 is an audio signal processing section, and 5 is a control section. The circuit, 6 is a video output terminal, 7 is an audio output terminal, S is a stereo control signal, M is a monaural control signal, and D is a multiplex audio control signal.

Next, the operation will be described. FIG. 4 is a frequency allocation diagram of the audio multiplexed baseband signal.
The + R signal and the LR signal of the sub-channel signal are multiplexed and transmitted, and stereo broadcasting can be performed. In the case of double audio, a double audio signal is sent as a sub-channel signal.
At this time, 982.5HZ, double
A 922.5HZ signal is sent during audio. In the case of monaural broadcasting, the subcarrier and the control signal are not transmitted. The control circuit 5
The operation mode of the audio signal processing unit 4 is switched according to S, M, and D output signals input from the tuner unit 2 to output an audio signal.

Further, as disclosed in Japanese Patent Application Laid-Open No. 1-292606 (Ken Onishi et al., Two persons), the technology of commercial cut of a VTR is disclosed. According to it
A technique has been disclosed in which a change in an audio multiplex signal is detected, and this is written into a control signal of a magnetic tape of a VTR by using a normal reproduction signal, a skip reproduction signal, and a control signal selectively, thereby cutting commercials. However, it cannot be applied to a request to cut a commercial at the time of receiving a broadcast or to view another channel only during a commercial.

[0005]

Since the conventional TV receiver is configured as described above, it is troublesome because it is manually switched to another channel when it becomes a commercial, and the timing of returning from the switched channel is lost. There was a problem that the continuation after the commercial was sometimes overlooked. The present invention has been made for the purpose of solving the above-mentioned problems, and is intended for commercial broadcasting.
Switching with the can without easily to other channels, co
Return to the original receiving channel after the end of the marshal broadcast
The aim is to obtain a TV receiver that can be obtained.

[0006]

SUMMARY OF THE INVENTION The present invention provides a receiving channel.
Detects commercial broadcasts by detecting audio control signals
Commercial broadcast detection means and the commercial broadcast detection means.
A commercial broadcast was detected by means of intelligence
When the other channels automatically
Switching means, and the switching means
Images of each channel switched
And each channel stored in this memory
Means for displaying channel images on sequentially divided small screens
It is provided with. The present invention also provides a receiving channel.
Detects commercial broadcasts by detecting audio control signals
Commercial broadcast detection means and other than a specific channel
When receiving a channel, the commercial broadcast detection means
Automatically detects that it is a commercial broadcast
Means for dynamically switching to the specific channel.
Things. The present invention further provides a commercial broadcast detecting means.
However, the sound of the original receiving channel remains
Voice control signal is detected, and the initial
End of commercial on receive channel detected
Equipped with means to automatically return to the original channel when
It is a thing.

[0007]

According to the present invention, sequentially switched at appropriate time intervals to accurately detect and other channel feeding release commercial by sound multiplex signals, the memory of each screen information is switched as to a static <br/> Tomega recorded and displayed on the multi-screen
Since Unishi and are, can easily select the other channel. According to the present invention, channels other than a specific channel are also provided.
When a commercial broadcast is detected during reception of a
I'm switching to a specific channel dynamically
In commercial broadcasting, watch a specific channel
Can be. According to the present invention, the original receiving channel
When commercial broadcasting ends in
Since it returns to the first receiving channel,
Never overlook the continuation after the marshal broadcast.

[0008]

[Embodiment 1] First, audio multiplexing in television broadcasting will be briefly described. As shown in FIG. 4, during stereo broadcasting, the L + R signal of the main channel signal and the L-R signal of the sub-channel signal are used.
The R signal is multiplexed and sent, and in the case of double sound, a double sound signal is sent as a sub-channel signal. At this time, 982.5HZ for stereo and 922.5HZ for dual sound as control signal
Is sent. In the case of monaural broadcasting, the subcarrier and the control signal are not transmitted.

FIG. 1 is a block circuit diagram showing a configuration of a recording system of a VTR according to a first embodiment of the present invention. Reference numeral 10 denotes a video signal memory for storing video data, and 8 denotes an address for reading and writing the video signal memory 10. , A read / write control circuit 9 for controlling reading and writing of data in the video memory 10, and a switch 11 for outputting an input video as it is or for outputting a memory video stored in the video memory 10. A switch 12, a specific image memory for outputting a specific image such as a clock, a calendar, a schedule, a video reservation screen, a self-made or optional animated image, a TV, and a video favorite screen; and 16, a memory control and channel control circuit ( The operation mode is determined by a key operation or a voice mode identification signal generation circuit, etc. Scan control circuit 8, the read-write control circuit 9, controls the switch 11 and the like.

A video signal memory 10 converts an input video signal into digital data, stores the converted digital data in a memory, reads out the digital data stored in the memory, and converts the digital data into an analog signal. Data is written to the memory and read from the memory is controlled by control signals from a read / write control circuit 9 and an address control circuit 8.

[0011] Figure 2 is a diagram that shows an example of a memory map structure in the video signal memory 10, are displayed horizontally, in a two-dimensional vertical. The numbers in parentheses indicate addresses on the map, and in this case, 256 × 2 in the horizontal and vertical directions.
There are 56 configurations. One address stores one sample of data, that is, if the video signal is quantized by, for example, 8 bits for analog-to-digital conversion, the 8-bit data is stored. This 256x
With the configuration of 256, an image signal for one field is formed.

As is well known, a television signal is composed of a synchronizing signal portion and an image signal portion. Usually, when storing image data in such a memory, the storage capacity of the memory is effectively used. And storing only the image signal section. Therefore, in order to read out the image data stored in the memory and restore the original television signal, a vertical and horizontal synchronization signal generator is installed,
Reading of data from the memory is performed by scanning in the vertical direction in accordance with a vertical synchronizing signal, and converting the image data thus read from the memory into an analog signal by a D / A converter, and synchronizing with the analog signal. The original television signal is restored by adding the composite synchronization signal from the signal generator.

In the first embodiment, when a quantization setting for converting an image signal of a television signal into digital data, for example, when the luminance level is quantized by 6 bits, the black level is set to “000000”. ,
The white level is set to “111111”.

Next, the operation will be described. Here, an example will be described in which the receiver is watching a multiplex audio movie. When it becomes a commercial, the audio mode identification signal generation circuit 20
Identifies that the audio has changed from multiplexed audio to stereo or monaural based on the signals input from terminals D, S, and M, and outputs an identification signal to the control circuit 16. The control circuit 16 sends a channel control signal to obtain switch the channels sequentially every few seconds to the TV tuner unit 2. The TV tuner unit 2 switches channels at intervals of several seconds under control of a control signal. The address control circuit 8 outputs addresses at appropriate time intervals to the video signal memory 10 and the read / write control circuit 9 and sequentially writes still images in the video signal memory 10 at predetermined intervals. The control circuit 16 switches the switches as appropriate, and outputs while switching the small screen still images stored in the video signal memory 10. If the user selects a channel to be viewed from the sequentially displayed still image information of the other channel and switches the tuner, the user can efficiently watch the other channel during commercials.

Next, the operation of the video signal memory 10 will be described. The commercial detection signal is transferred from the mode identification signal generation circuit 20 to the control circuit 16, and the control circuit 16 stores the reproduced video signal "Video A" for one field in the video signal memory 10 at an appropriate timing. At this time,
In the vertical direction, the address counter is divided into n equal parts. In the four-division embodiment shown in FIG. 2, the vertical and horizontal division is performed, so that the frequency is divided by 、, that is, the video signal “video A” for one field is compressed in the horizontal and vertical directions. As shown in FIG. 2, address (1, 1) to address (12)
8, 128).

Further, one field of reproduced video signal "Video B" sampled at appropriate time intervals by the control circuit 16 is stored in the video signal memory 10.
The data of "Image B" is horizontal,
In the vertical direction, the address counter is frequency-divided by 分 and data is compressed in such a manner that an offset of MSB = 1 is given only in the horizontal direction, and as shown in FIG. 2, the address (1,129) is changed to the address (128,256). It is memorized.

Similarly, when the video signal "video C" for one field is stored in the video signal memory 10, horizontal, horizontal,
When the address counter is divided by 共 に in both the vertical direction and an MSB = 1 offset is provided only in the vertical direction, and the video signal “video D” for one field is stored in the video signal memory 10, both the horizontal and vertical address counters are used. Is divided by を to give an offset of MSB = 1.

As a result, as shown in FIG. 2, the data of "video C" is changed from address (129, 1) to address (256, 12).
8), the data of the video D has the address (129, 129)
From (256) to (256). After the four screens are set, the switch 11 is operated and switched by the control circuit 16, and the video signal stored in the video signal memory 10 is output. As shown in FIG.
The images A, B, C, and D are projected on the screen.

Embodiment 2 FIG. Among the broadcasts, there are broadcasts without commercials such as NHK and educational broadcasts, and channels that do not cause any trouble. When a channel other than a specific channel (for example, NHK) is being received, channel control information is automatically sent from the control circuit 16 to the tuner unit 2 when a commercial broadcast is detected from the audio control signal to switch to the specific channel. Switching, and when it is detected from the audio control signal that the commerce on the original reception channel has ended, the audio mode identification signal generation circuit 20 to the control circuit 16
The control circuit 16 may send a channel control signal to the tuner unit 2 to automatically return to the original receiving channel. In this case, the original receiving channel
Detection of the end of commercial broadcasting on the channel is described above.
Channel after switching to a specific channel
This is accomplished by continuing to detect the
It goes without saying that it is something that is done.

In the above embodiment, the screen is divided into two vertically and horizontally, but it will be easily understood that any number of divisions are possible.

[0021]

According to the present invention, sequentially switched at appropriate time intervals to accurately detect and other channel feeding release commercial by sound multiplex signals, each screen information switching it
Each record in memory as a still image, since the operator displays on the multi-screen can easily select the other channel. According to the present invention, channels other than the specific channel are also provided.
A commercial broadcast was detected when receiving a channel
Automatically switch to a specific channel
So watch a specific channel during commercial broadcasting
be able to. The present invention also provides an
When a commercial broadcast on
To return to the original receiving channel
Therefore, the continuation after the commercial broadcast is not overlooked.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a map of addresses of a video signal memory according to the first embodiment.

FIG. 3 is a diagram illustrating a display screen of a monitor according to the first embodiment.

FIG. 4 is a frequency allocation diagram of a sound multiplex signal of a television signal.

FIG. 5 is a block circuit diagram of a conventional television receiver.

[Explanation of symbols]

 2 TV receiver tuner unit 3 Video signal processing unit 4 Audio signal processing unit 8 Address control circuit 9 Read / write control circuit 10 Video signal memory 11 Screen switch 12 Specific image memory 16 Memory control and channel control circuit 20 Audio mode identification signal generation circuit

Claims (3)

(57) [Claims] 1. A commercial broadcast detecting means for detecting a commercial broadcast by detecting an audio control signal of a receiving channel, and automatically detecting a commercial broadcast by the commercial broadcast detecting means, and automatically selecting an appropriate broadcast for another channel. a switching hands <br/> stage switching with a time interval, a memory for recording the image of each channel is switched by the switching means respectively as a still image, the image of each channel stored in the memory are sequentially divided And a means for displaying on a small screen. 2. A commercial broadcast detecting means for detecting a commercial broadcast by detecting an audio control signal of a receiving channel , and
TV receiver, characterized in that a means automatically perating the Came ra switch to the particular channel <br/> le when it is detected that a commercial broadcast by the commercial broadcast detecting means. 3. A commercial broadcast detecting means according to claim 1, wherein said commercial broadcast detecting means is initially provided after the channel is switched.
The audio control signal of the receiving channel is detected.
TV receiver comprising the means for <br/> return to Komashi <br/> catcher Le of exit was was a come automatically initial detection channels in the original reception channel based on the results .