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Multichannel signal coding equipment and multichannel signal decoding equipment

一种信号编码、解码装置的技术，应用在多信道信号编码装置领域，能够解决不能解码端电平调整等问题

Inactive Publication Date: 2007-08-01
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, since common parameters are used in subbands, there is a problem that fine level adjustment cannot be performed on the decoding side.

Method used

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  • Multichannel signal coding equipment and multichannel signal decoding equipment
  • Multichannel signal coding equipment and multichannel signal decoding equipment
  • Multichannel signal coding equipment and multichannel signal decoding equipment

Examples

Experimental program
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Embodiment 1

[0032] FIG. 1 is a block diagram showing the structure of a multi-channel signal transmission system according to an embodiment of the present invention. The multi-channel signal transmission system 1 includes: a multi-channel signal encoding device 2, which encodes signals of N (N is an integer greater than or equal to 2) channels; a multi-channel signal decoding device 3, which decodes signals of N channels (hereinafter referred to as "N channel signal"); the propagation path 4 propagates the signal acquired by the multi-channel signal encoding device 2 to the multi-channel signal decoding device 3.

[0033] The multi-channel signal encoding device 2 includes: a downmix (down mix) part 10, which downmixes N channel signals to obtain a monophonic reference signal (hereinafter referred to as "reference channel signal"); an encoding part 11, which encodes the reference channel signal; The signal analysis part 12 analyzes each of the N channel signals, extracts parameters repres...

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PUM

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Abstract

Multichannel signal coding equipment is provided for presenting a high quality sound at a low bit rate. In the multichannel signal coding equipment (2), a down mix part (10) generates monaural reference channel signals for N number of channel signals. A coding part (11) codes the generated reference channel signal. A signal analyzing part (12) extracts parameters indicating characteristics of each of the N number of channel signals. An MUX part (13) multiplexes the coded reference channel signal with the extracted parameters.

Description

technical field [0001] The present invention relates to a multi-channel signal coding device and a multi-channel signal decoding device, in particular to a multi-channel signal coding device and a multi-channel signal decoding device used in a system for transmitting multi-channel voice signals and audio signals. Background technique [0002] Typically speech codecs encode only a monophonic representation of speech. Generally, such mono codecs are used in communication machines (eg, mobile phones, teleconferencing machines, etc.) in which signals are derived from a single sound source, such as a human voice. In the past, due to the limitations of the transmission frequency band and the processing speed of DSP (Digital Signal Processor, Digital Signal Processor), such a mono signal was sufficient, but with the advancement of technology, the frequency band has been improved, so the quality of voice has become more important factors to consider. As a result, the disadvantages...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00G10L19/008G10L19/02G10L25/18G10L25/93H04J99/00
CPCG10L19/06G10L19/008G10L25/93G10L19/08G10L19/20H03M7/30
Inventor 后藤道代张峻伟梁世丰吉田幸司
Owner PANASONIC CORP