Method and device for encoding and decoding embedded voice or voice-frequency signal

An audio signal encoding and audio signal technology, which is applied in the field of encoding, can solve the problems of narrow effective bandwidth of the signal, the signal cannot represent all the characteristics of the audio signal, and cannot meet the requirements of broadband multimedia communication, etc., to achieve wide signal bandwidth and meet the encoding requirements Effect

Inactive Publication Date: 2009-11-04
BEIJING UNIV OF TECH +1
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Problems solved by technology

[0005] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: in the existing embedded speech coding mode, the effective bandwidth of the signal that can be processed is relatively narrow, for example: the embedded speech coding standard G.729.1 T

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  • Method and device for encoding and decoding embedded voice or voice-frequency signal
  • Method and device for encoding and decoding embedded voice or voice-frequency signal
  • Method and device for encoding and decoding embedded voice or voice-frequency signal

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Embodiment Construction

[0031] In order to solve the problem that the existing embedded speech coding standards can process narrow signal frequency bands and are not suitable for coding audio signals, the embodiments of the present invention provide an embedded speech or audio signal coding and decoding method and device.

[0032] Such as figure 1 As shown, the embedded voice or audio signal coding method provided by the embodiment of the present invention includes:

[0033] Step 101, divide the signal into low-frequency sub-bands and high-frequency sub-bands according to the frequency band occupied by monophonic ultra-wideband speech or audio signals;

[0034] Step 102, at the broadband embedded coding layer, perform embedded coding on the low-frequency sub-band signal of the monophonic ultra-wideband speech or audio signal;

[0035] Step 103, perform embedded coding on the high-frequency sub-band signal of the monophonic ultra-wideband voice or audio signal at a preset high-frequency signal coding...

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Abstract

The invention discloses a method and a device for encoding and decoding embedded voice or a voice-frequency signal, belonging to the encoding technology and aiming at solving the problem that a signal frequency band processed by the prior embedded voice encoding is narrower. The method for encoding the embedded voice or the voice-frequency signal comprises the following steps: dividing the signal into a low-frequency subband and a high-frequency subband according to a frequency band occupied by mono ultra wideband voice or a voice-frequency signal; carrying out embedded encoding for a low-frequency subband signal of the mono ultra wideband voice or the voice-frequency signal in a wideband embedded encoding layer; and carrying out the embedded encoding to a high-frequency subband single of the mono ultra wideband voice or the voice-frequency signal in a preset high-frequency signal encoding layer. The method and the device for encoding and decoding the embedded voice or the voice-frequency signal can be applied in the fields of audio/video frequency conferences, picturephone conferences, network communication, mobile communication, network congestion control, 3-G mobile communication and 4-G mobile communication.

Description

technical field [0001] The present invention relates to encoding technology, in particular to an embedded voice or audio signal encoding and decoding method and device. Background technique [0002] Embedded coding is a variable-rate coding. Different from traditional selection-based variable-rate coding, embedded coding generates a code stream structure with embedded inclusion relations in a layered manner. The code stream generated by embedded coding can be divided into multiple levels according to the importance of the information contained - a core layer and more than one enhancement layer. Among them, the core layer is located in the low layer of the code stream, and is used to provide the most basic information of the signal; the enhancement layer is located in the high layer of the code stream, and is used to supplement the detailed information of the signal. When performing embedded coding on a signal, the more layers the code stream contains, the closer the decoded...

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Application Information

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IPC IPC(8): G10L19/00G10L19/02G10L19/18
Inventor 鲍长春贾懋珅李锐
Owner BEIJING UNIV OF TECH
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