JPH06205317A - Multi-channel broadcast receiver - Google Patents

Abstract

PURPOSE:To attain watching of combination of programs such as a program A provided with a video image and a program C provided with an audio signal by selecting at least one kind of program simultaneously and attaining selection of free combinations of video and audio signals. CONSTITUTION:When a kind of video and audio signals of a program to be displayed is commanded from a remote commander 8, a 1st tuner section 1 and a 2nd tuner section 2 selects a channel on which programs are multiplexed by using an IF signal 10 and output a demodulated digital signal respectively. A 1st decode section 3 and a 2nd decode section 4 apply error correction processing to the demodulated digital signal, extract each multiplexed program through decoding and time division or the like and separate an video signal and an audio signal to be extracted for each multiplexed program. Then a program selection section 5 selects a video signal of a commanded program and outputs the signal to a video selection section 6 of a next stage and outputs the audio signal to an audio selection section 7. Thus, even after a time of start of a program A, the program A is watched newly from its start.

Description

Detailed Description of the Invention

[0001]

The present invention utilizes satellite broadcasting and the like,
The present invention relates to a channel selection device for a multi-channel broadcast receiver, which is expected to be realized in the near future.

[0002]

2. Description of the Related Art Conventionally, in the field of digital broadcasting, character multiplex broadcasting in which character information is multiplexed in a digital format, voice / data broadcasting of television satellite broadcasting, etc. are merely implemented by digitizing broadcast radio waves. Recently, with the development of high-efficiency coding technology capable of band compression with high image quality and high sound quality, and the development of LSI technology suitable for digital technology, the prospect of inexpensive home receivers has been seen, and the radio waves of television broadcasting and voice broadcasting can be seen. Became possible. For example, in satellite digital broadcasting, a plurality of programs (multi-channel broadcasting) are planned to be broadcast on the current system television (widening) in a 12 GHz band using a 1-channel repeater. In addition, ISDB (Integrated Services) that multiplexes and broadcasts various services such as high-definition audio graphics and PCM voice on the same repeater (same channel).
Digital Broadcasting will be implemented. On the other hand, it is expected that receivers in the digital age will not only receive individual broadcasts but also be integrated receiving terminals for households that receive packages and communication services. Also, in the analog field, stereo audio broadcasting and bilingual broadcasting have already been carried out, but it has not been realized because it is technically difficult to multiplex and transmit a natural image in one channel. Therefore, in both the digital field and the analog field, the multiplex broadcasting of the natural image has not been implemented yet, and the efficient use of the broadcast radio wave has not been fully achieved.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and in a future multi-channel broadcasting receiver, at least one type of program can be simultaneously selected and video and audio can be freely selected. An object is to provide a multi-channel broadcast receiver that can be used.

[0004]

In order to achieve the above object, I carrying a digital signal modulated by QPSK or the like is used.
Channel selecting / demodulating means for outputting a demodulated digital signal after selecting a predetermined channel from the F signal, and video signal and audio for each program multiplexed by performing error correction processing and decoding on the demodulated digital signal Decoding means for separating and extracting signals, program selecting means for selecting at least one type of program from the extracted programs, video selecting means for selecting video to be displayed from the selected programs, and the selected It is provided with a voice selecting means for selecting a voice signal to be displayed (making a sound) from the program, a key input means such as a remote controller for giving an instruction for program selection, and a control means for controlling each part.

[0005]

With the above-described structure, when a channel selection instruction for the type of program, the type of video and audio to be displayed is input from the key input means, the channel selection / demodulation means selects a predetermined channel and then demodulates. Output the digital signal. The decoding means performs error correction processing on the demodulated digital signal, decodes it, and extracts a video signal and an audio signal for each multiplexed program. The program selecting means selects the video signal and audio signal of the program instructed in advance by the key input means from the extracted video signal and audio signal of each program and outputs them to the video selecting means and audio selecting means in the next stage. . The video selection means selects and outputs the video signal of the program previously instructed by the key input means. The audio selection means selects and outputs the audio signal of the program instructed by the key input means in advance.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A multi-channel broadcasting receiver according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of a channel selection device of a multi-channel broadcast receiver according to the present invention. 1 is QPSK (Quadurature Ph
The first tuner unit outputs a demodulated digital signal after selecting a predetermined channel from the IF signal 10 that carries a digital signal modulated by a method such as asase Shift Keying). 2 is a second tuner section. 3 performs error correction processing on the demodulated digital signal,
It is a first decoding unit that decodes and extracts each multiplexed program by time division or the like, and separates a video signal and an audio signal. Reference numeral 4 is a second decoding unit. A program selection unit 5 selects at least one type of program from the extracted programs and outputs a video signal and an audio signal of the selected program. Reference numeral 6 denotes a video selection unit for selecting the video signal 12 for display from the video signals of the selected program. Reference numeral 7 denotes an audio selection unit for selecting the audio signals 13 and 14 that output (sound) a sound from the audio signal of the selected program. Reference numeral 8 is a remote controller for giving instructions such as program selection. Reference numeral 9 is a microcomputer that controls each unit.

The tuning operation of the multi-channel broadcasting receiver according to the present invention will be described. When an instruction of the type of video and audio of the program to be displayed is input from the remote controller 8, the first tuner unit and the second tuner unit select the channels in which the program is multiplexed from the IF signal 10 and then demodulate them respectively. Output the digital signal. The first decoding unit and the second decoding unit 2 perform error correction processing on the demodulated corresponding digital signal, decode it, and take out for each program multiplexed by time division or the like. Separate the signals. The program selection unit 5 selects a video signal of a program instructed by the remote controller 8 from the extracted programs in advance, outputs it to the video selection unit 6 in the next stage, and outputs an audio signal of the instructed program. Output to the selection unit 7. The video selection unit 6 outputs the video signal 12 for selecting and displaying the supplied video signal. The voice selection unit 7 selects the supplied voice signal and outputs voice signals 13 and 14 for outputting (ringing) a sound.

FIG. 2 is a conceptual diagram showing program selection, video selection, and audio selection of the multi-channel broadcast receiver according to the present invention. A program A, a program B, and a program C, which have been multiplexed on the same channel by time division, are decoded by the first decoding unit 3 and the second decoding unit 4, and are separated into a video signal and an audio signal for each program. Shows the state of being.
The program selecting section 5 performs a program selecting operation 21 instructed by the remote controller 8 in advance, and then the A program and the C program are selected. The video selection unit 6 selects the video signal A by the video selection operation 22. The voice selection unit 7 selects the voice CL and the voice CR by the voice selection operation 23.

FIG. 3 is a diagram showing an example of multiplexing programs of a multi-channel broadcasting receiver according to the present invention. Reference numeral 31 represents a state in which the A program is transmitted to the first sub-channel and then the B program is transmitted. Reference numeral 32 indicates a state in which the C program is transmitted to the second sub-channel at the time when the A program is transmitted to the first sub-channel, and then the A program is transmitted. Focusing on the program A, it can be seen at the time t1 (33) or the time t2 (34) whichever is more convenient. In the multi-channel broadcasting, a plurality of sub-channels are multiplexed on each transmitted channel by a method such as time division.

[0010]

As described above, the present invention can be applied to at least one receiver for future multi-channel broadcasting.
Provided is a multi-channel broadcasting receiver capable of selecting a type of program and freely combining video and audio. Therefore, for example, it is possible to simultaneously view the program A on the display screen and the program C for the sound at the same time. Even if the time when the A program has already started, the next A
There is an advantage that it is possible to realize a function that the conventional receiver does not have, such as viewing the program A from the beginning at the time when the program starts.

[Brief description of drawings]

FIG. 1 is a block diagram of a channel selection device of a multi-channel broadcast receiver according to the present invention.

FIG. 2 is a conceptual diagram showing program selection, video selection, and audio selection of the multi-channel broadcast receiver according to the present invention.

FIG. 3 is a diagram showing an example of multiplexing programs of a multi-channel broadcasting receiver according to the present invention.

[Explanation of symbols]

1 1st tuner part 2 2nd tuner part 3 1st decoding part 4 2nd decoding part 5 Program selection part 6 Video selection part 7 Audio selection part 8 Remote control 9 Microcomputer 10 IF signal 12 Video signal 13 Audio signal 14 Audio signal 20 State in which A program, B program and C program are separated into video signal and audio signal 21 Program selection operation 22 Video selection operation 23 Audio selection operation 31 A program, then B program on the first sub-channel State of transmitting 32 State of transmitting program to second sub-channel 33 Time t1 34 Time t2

Claims (2)

[Claims] 1. A tuning / demodulating means for outputting a demodulated digital signal after selecting a predetermined channel from an IF signal carrying a digital signal modulated by QPSK or the like, and an error in the demodulated digital signal. Decoding means for performing correction processing, decoding, and separating and extracting a video signal and an audio signal for each multiplexed program, program selecting means for selecting at least one type of program from the extracted program, and the selected program A video selecting means for selecting a video to be displayed, a voice selecting means for selecting an audio signal to be displayed (sounds) from the selected program, and a key input means such as a remote controller for giving an instruction for program selection, A control means for controlling each part is provided, and at least one type of program is simultaneously selected from the multi-channel broadcast, and the video and audio of the program are arbitrarily combined. A multi-channel broadcasting receiver characterized by being selected. 2. A plurality of channel selection / demodulation means and a plurality of decoding means, which simultaneously select at least one type of program from multi-channel broadcasting, and select any combination of video and audio of the program. The multi-channel broadcast receiver according to claim 1.