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Joint enhancement of multi-channel audio

A multi-channel, channel technology, applied in the field of audio coding and decoding, can solve the problem that stereo or multi-channel coding cannot be applied

Inactive Publication Date: 2013-11-13
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technique requires the separation of different sound source signals, so it is generally not applicable to stereo or multi-channel coding

Method used

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  • Joint enhancement of multi-channel audio
  • Joint enhancement of multi-channel audio
  • Joint enhancement of multi-channel audio

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Experimental program
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Embodiment Construction

[0078] Throughout the drawings, the same reference numerals will be used for corresponding or similar elements.

[0079] The present invention relates to multi-channel (ie at least two channel) encoding / decoding techniques in audio applications, in particular stereo encoding / decoding in audio transmission systems and / or for audio storage. Examples of possible audio applications include teleconferencing systems, stereo audio transmission in mobile communication systems, various systems for providing audio services, and multi-channel home theater systems.

[0080] refer to Figure 13 , it can be seen that the invention preferably relies on the principle of encoding (S1) a first signal representation of a set of input channels in a first signal encoding process, and encoding (S1) a first signal representation of a set of input channels in a second signal encoding process At least one additional signal representation of at least a portion of the input channels is encoded (S4). I...

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Abstract

An overall encoding procedure and associated decoding procedure are presented. The encoding procedure involves at least two signal encoding processes operating on signal representations of a set of audio input channels. Local synthesis is used in connection with a first encoding process to generate a locally decoded signal, including a representation of the encoding error of the first encoding process. This locally decoded signal is applied as input to a second encoding process. The overall encoding procedure generates at least two residual encoding error signals from at least one of said encoding processes, including at least said second encoding process. The residual error signals are then subjected to compound residual encoding in a further encoding process, preferably based on correlation between the residual error signals.

Description

technical field [0001] The present invention relates generally to audio encoding and decoding techniques, and more particularly to multi-channel audio encoding such as stereo encoding. Background technique [0002] The need to provide telecommunication services over packet-switched networks has increased dramatically and is stronger than ever today. At the same time there is a growing diversity of media content to be transmitted, including different bandwidths, mono and stereo, and voice and music signals. A lot of work from various standardization bodies has been brought together to define flexible and efficient solutions for delivering mixed content to users. It is worth noting that two major puzzles remain to be resolved. First, the diversity of deployed networking technologies and user devices means that the same service provided to different users has different user-perceived quality due to the different properties of the transmission network. Therefore, improved qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/008G10L19/24
CPCG10L19/008G10L19/24
Inventor E·诺维尔A·塔莱布
Owner TELEFON AB LM ERICSSON (PUBL)