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Method for reducing SID frame transmission rate in AMR voice coding source control rate

An AMR voice and frame transmission technology, applied in the field of voice coding, can solve problems such as difficult to satisfy at the same time, single fault tolerance, etc., to achieve the effect of improving the utilization rate of system resources, increasing the complexity, and the method is simple and easy to implement

Inactive Publication Date: 2006-05-03
连展科技(天津)有限公司
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Problems solved by technology

Therefore, the traditional mobile speech coding technology is difficult to meet these two requirements at the same time because of its single error tolerance.

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  • Method for reducing SID frame transmission rate in AMR voice coding source control rate
  • Method for reducing SID frame transmission rate in AMR voice coding source control rate
  • Method for reducing SID frame transmission rate in AMR voice coding source control rate

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Embodiment Construction

[0027] The following embodiments are only used to illustrate the present invention, but not to limit the present invention. Those of ordinary skill in the relevant technical field can also make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all Equivalent technical solutions also belong to the category of the present invention, and the patent protection scope of the present invention should be defined by each claim.

[0028] In the source rate control mechanism SCR, comfortable background noise can be adopted to solve the problem of discontinuous background noise. That is, the parameters of the comfortable background noise are estimated at the sending end, and then sent to the receiving end at a certain rate.

[0029] At the sending end, the comfortable background noise estimation algorithm uses the unquantized linear prediction parameters in the AMR algorithm and the second set of unquantized LSF (Linear Spec...

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Abstract

This invention puts forward a method for reducing the transmission rate of mute frame in the source control rate of AMR phonetic code, which applies the vector of line spectrum frequency(LSF)of low rate mote to divide the sub-frame of the LSF vector into 8,8 and 7 to reduce the bit number of the mute frame so as to reduce the transmission rate at the mute mote having the following advantage: reducing the transmission rate to 1.6kb / s from the original 1.8kb / s with the reducing rate of 11.1%.

Description

technical field [0001] The invention relates to the field of speech coding, in particular to a method for reducing the SID frame transmission rate in the source control rate of AMR speech coding. Background technique [0002] Adaptive Multi-Rate (AMR: Adaptive Multi Rate) speech coding is a speech compression coding technology developed by the 3rd Generation Mobile Communication Standardization Partnership Project (3GPP) and used in the 3rd generation mobile communication WCDMA system. One of the differences between it and the previous mobile communication voice coding method is that the previous mobile communication voice coding uses a fixed coding rate. However, when human beings perform voice communication, about 70% of the idle time is not speaking. Therefore, it is a waste of channel resources to always use one rate for voice coding. In addition, with the development of mobile communication, especially the third-generation mobile communication system, higher requiremen...

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Application Information

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IPC IPC(8): H04L1/00
Inventor 邹丽恒张林郭更生
Owner 连展科技(天津)有限公司