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Voice signal coding and decoding methods, devices and systems

A voice signal and coding method technology, applied in the field of voice signal coding, decoding method, device and coding and decoding system, can solve the problem of reducing the transmission bandwidth and broadband voice quality, and achieve the effect of improving cost performance

Active Publication Date: 2012-09-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The inventor found in the process of realizing the present invention that G.711.1 and G.711.0 in the prior art cannot reduce transmission bandwidth while improving broadband voice quality

Method used

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  • Voice signal coding and decoding methods, devices and systems
  • Voice signal coding and decoding methods, devices and systems
  • Voice signal coding and decoding methods, devices and systems

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] In the embodiment of the present invention, if the sampling rate of the voice signal is 8kHz, then the voice signal is a narrowband signal; if the sampling rate of the voice signal is higher than 8kHz, then the voice signal is a broadband signal, in addition, the narrowband signal and the broadband signal are The relative concept should not be used as a limitation to the embodiment of the present invention according to the above-mentioned sa...

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Abstract

The embodiment of the invention discloses voice signal coding and decoding methods, devices and systems. The coding method comprises: coding an input voice signal to obtain a broadband code stream, wherein the broadband code stream comprises a core layer bit stream and an expanded and reinforced layer bit stream; compressing the core layer bit stream to obtain a compressed code stream; and packing the compressed code stream and the expanded and reinforced layer bit stream to obtain a packed code stream. In the embodiment of the invention, by pressing the core layer bit stream and packing the compressed code stream and the expanded and reinforced layer bit stream, the transmission bandwidth occupied by the input voice signal is reduced; as the input voice signal is subjected to broadband voice coding, the transmission of broadband voice code stream by the transmission bandwidth of a narrow band is realized, and the performance-to-price ratio of the voice signal transmission is improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of audio processing, and in particular, to a speech signal encoding and decoding method, device, and encoding and decoding system. Background technique [0002] In the network transmission of real-time voice, in order to improve the voice quality, the real-time voice transmission system needs to select the appropriate voice compression algorithm and transmission method according to the actual application network capabilities, transmission bandwidth, delay, complexity and voice quality indicators, so that Maximize the cost performance of voice signal transmission. [0003] Among many voice codecs, G.711 is widely used in practical applications due to its simple algorithm, strong robustness, and small delay. T) On the basis of narrowband speech coder G.711, two extended speech coder standards are made: G.711.1 and G.711.0; wherein, G.711.1 is realized by wideband extension on the basis o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/02G10L19/14H03M7/30G10L19/24
CPCH04B7/02G10L19/00H04B7/0647G10L19/24G10L19/0017G10L19/02
Inventor 齐峰岩苗磊
Owner HUAWEI TECH CO LTD
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