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Method and apparatus for decoding an audio signal

An audio signal and sound mixing technology, which is applied in the field of decoding audio signals and decoding audio signal devices, can solve the problems of unable to expand and mix signal channels, unable to generate output channel audio signals, etc.

Active Publication Date: 2009-01-28
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is not possible to generate output channel audio signals that do not follow the agreed upon structure
For example, it is not possible to mix a signal channel extension into an audio signal with a different number of channels (fewer or more) than determined by the agreed structure

Method used

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  • Method and apparatus for decoding an audio signal

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Embodiment Construction

[0033] The best way to practice the invention

[0034] Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

[0035] General terms currently and commonly used are selected as the terms used in the present invention. And, there are terms arbitrarily selected by the applicant for special cases, and their detailed meanings are explained in detail in the description of the preferred embodiments of the present invention. Therefore, the present invention should be understood not from the literal meaning of the terms, but from the meaning of the terms.

[0036] First, the present invention generates modified spatial information using spatial information, and then uses the generated modified spatial information to decode an audio signal. In this case, the spatial information is spatial information extracted during downmixing according to a predetermined tree configuration, and the ...

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Abstract

An apparatus for decoding an audio signal and method thereof are disclosed. The present invention includes receiving the audio signal and spatial information, identifying a type of modified spatial information, generating the modified spatial information using the spatial information, and decoding the audio signal using the modified spatial information, wherein the type of the modified spatial information includes at least one of partial spatial information, combined spatial information and expanded spatial information. Accordingly, an audio signal can be decoded into a configuration different from a configuration decided by an encoding apparatus. Even if the number of speakers is smaller or greater than that of multi-channels before execution of downmixing, it is able to generate output channels having the number equal to that of the speakers from a downmix audio signal.

Description

technical field [0001] The present invention relates to audio signal processing, in particular to a device and method for decoding audio signals. Although the invention is suitable for a wide range of applications, it is particularly suitable for decoding audio signals. Background technique [0002] Generally speaking, when an encoder encodes an audio signal, if the audio signal to be encoded is a multi-channel audio signal, then the multi-channel audio signal is downmixed into two channels or one channel to generate The downmixed audio signal is down-mixed, and spatial information is extracted from the multi-channel audio signal. Spatial information is information that can be used to upmix a multi-channel audio signal from a downmix audio signal. Meanwhile, the encoder downmixes the multi-channel audio signal according to a predetermined tree configuration. In this case, the predetermined tree configuration may be a structure agreed between the audio signal decoder and t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00G10L19/008
Inventor 房熙锡吴贤午林宰显金东秀郑亮源
Owner LG ELECTRONICS INC