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A low code rate coding and decoding scheme for multi-language circle stereo

A stereo, multilingual technology, applied in the field of codec, can solve the problems of surround sound signal difficulties, large data volume, large bandwidth, etc.

Inactive Publication Date: 2008-04-23
施伟强
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Problems solved by technology

[0016] Similarly, although the bandwidth of each program channel of high-definition TV HDTV is relatively wide, the transmission of high-definition and high-quality video and audio signals will greatly increase the amount of transmitted data and occupy a large bandwidth. Therefore, the current encoding method ( sequence) and encoding formats to transmit 5.1-channel surround sound signals in multiple languages ​​are also difficult

Method used

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  • A low code rate coding and decoding scheme for multi-language circle stereo
  • A low code rate coding and decoding scheme for multi-language circle stereo
  • A low code rate coding and decoding scheme for multi-language circle stereo

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Embodiment Construction

[0054] (1) The processing method of sweetone version 1 codec scheme for audio signals:

[0055] In the sweetone version 1 codec scheme: when the terminal (digital TV, DVD player) plays back, the vocal dialogue is only positioned on the center C channel, so there is no need to process the vocal dialogue sound effect at the front end. The collected signal can be encoded, transmitted and played back in real time. It can be applied to multilingual 5.1-channel surround sound broadcasting of live broadcast programs. Of course, this solution is also applicable to occasions of non-real-time transmission.

[0056]Front-end: The collected multilingual (multi-channel) monophonic vocal dialogue signals are simultaneously compressed in the same sampling period, and compressed into multi-channel monophonic compressed data packets. The collected 5.1-channel background sound surround sound signal is also compressed in the same sampling period at the same time, and compressed into a 5.1-chan...

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Abstract

Belonging to technical area for encoding and decoding audio of digit TV and video disk, the invention solve issue how to reduce data quanitity to be transmitted and stored when digit TV or video disk transmits or stores multilingual accompanying sounds, all of which are walkaround stereo in 5.1 sound track. Main points of the technical scheme are that dialogue signal of multilingual human voices and one route of background sound signal in 5.1 sound track are compressed all alone respectively; then, after packaging and multiplexing operation, the method transmits or stores the said compressed data. When decoding and playing back, recombining and mixing the compressed dialogue signal of multilingual human voices (selecting one language) with background sound signal so as to restore walkaround stereo in 5.1 sound track for one language. The invention is applicable to digit TV and video disk (DVD,high resolution DVD) mainly.

Description

[0001] Preface We can look forward to the near future: during the 2008 Olympic Games, we will provide high-quality digital live TV programs to the whole world: the images use high-definition images, and also provide multiple languages ​​for users to choose Explanation audio, and the audio for each language is a 5.1-channel surround sound signal. It enables the viewers to choose the commentary that they can understand, as well as the audio-visual experience as if they were at the scene of the game. [0002] And high-definition audio-visual discs, such as EVD, Blu-ray DVD, etc., can not only store high-definition images, but also store and record audio in multiple languages ​​that can be selected, and the audio in each language is 5.1 channels. surround sound signal. The viewer can choose the dialogue and accompanying sound in their own language, and can fully enjoy the realistic sound effect of 5.1-channel surround sound. [0003] However, under the current encoding method and ...

Claims

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Application Information

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IPC IPC(8): H04S3/02H04S7/00
Inventor 施伟强
Owner 施伟强
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