Efficient configurable frequency domain parameter stereo-sound and multi-sound channel coding and decoding method and system

A technology of frequency domain parameters and encoding methods, applied in the field of stereo and multi-channel encoding and decoding, which can solve problems such as complex encoding and decoding structures

Inactive Publication Date: 2007-11-07
凯为半导体科技(上海)有限公司
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Problems solved by technology

[0007] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide an efficient and configurable frequency-domain parametric stereo and multi-channel codec method and system, and provide a consistent codec framework to solve the problems caused by resampling in the time domain. Problems that overcomplicate the codec structure

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  • Efficient configurable frequency domain parameter stereo-sound and multi-sound channel coding and decoding method and system
  • Efficient configurable frequency domain parameter stereo-sound and multi-sound channel coding and decoding method and system
  • Efficient configurable frequency domain parameter stereo-sound and multi-sound channel coding and decoding method and system

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[0146] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0147] Fig. 1 is a functional block diagram of the encoding system of the present invention, and Fig. 2 is a functional block diagram of the decoding system of the present invention. The modules indicated by dotted lines can be equivalent to pass-through modules in some specific embodiments, that is, the input of this module is directly output to the next module as an output signal.

[0148]Fig. 1 is a functional block diagram of an efficient and configurable frequency-domain parameter stereo and multi-channel coding system according to the present invention. As shown in Fig. Encoder module 203, signal estimation module 204, first, second and third time-frequency transformation modules 205, 206, 207, signal type analysis module 208, first, second and third high-frequency extraction modules 213, 209, 210 , a low-frequency extrac...

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Abstract

This invention provides a method and a system for coding/decoding frequency domain parameter stereos and multiple tracks, which converts signals of right and left tracks to a residual signal of a sum-difference tack and a residual signal of an estimated difference track, carries out time frequency conversion to residual signals of the estimated difference track, the original difference track and the original sum track to pick up the HF component and low frequency component of the residual signal of the original difference track, which is coded in quantization to utilize the HF component to get estimated residual RF component of the right and left tracks and gets the original residual RF component of the right and left tracks to be controlled in gain to get a gain coefficient of the difference of the two tracks and coded in quantization and finally multiplexes the coded data and edge information to get a frequency domain parameter stereo bit stream.

Description

technical field [0001] The invention belongs to the technical field of stereo and multi-channel encoding and decoding, in particular to an efficient and configurable frequency-domain parameter stereo and multi-channel encoding and decoding method and system. Background technique [0002] After years of technological development, digital audio coding technology has become very mature. At present, many audio coding technologies have become industrial standards and are widely used. Such as AC-3 of Dolby laboratory, MP3 and AAC of MPEG organization, and AMR-WB+ and EAAC+ of 3GPP organization, etc., these technologies are the result of the development of digital coding technology in different stages. With the increasing popularity of the mobile field, the Internet, and the wireless communication field, there is still a great demand for more efficient coding techniques. [0003] The main principle of the coding strategy to reduce the coding bit rate is to remove signal redundanc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00G10L19/02G10L19/04G10L19/008
Inventor 王磊李迅刘颖徐森
Owner 凯为半导体科技(上海)有限公司
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