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Method for compensating drop-out speech service data frame

A voice service and voice data technology, applied in the field of communication, can solve problems such as the inability to correctly process input signals, and the quality of voice calls cannot meet the predetermined requirements, so as to achieve excellent compensation quality, good generated voice quality, and improve voice call quality Effect

Inactive Publication Date: 2009-12-16
HUAWEI TECH CO LTD
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Problems solved by technology

[0008] The disadvantage of the above-mentioned G.711 APPENDIX I frame loss compensation / frame loss concealment scheme is: this scheme uses the method of pitch waveform repetition, and it must be able to correctly extract the pitch period of the input signal. Therefore, this scheme cannot correctly handle For input signals such as noise, the quality of voice calls in the environment of frame loss often cannot meet the predetermined requirements

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  • Method for compensating drop-out speech service data frame

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Embodiment Construction

[0037] The present invention provides a method for compensating lost speech service data frames. The core of the present invention is: by distinguishing the active / inactive types of the two frames of speech before and after the lost speech frame, and then combining the linear prediction method or Algorithms for comfort noise generation, and synthesizing lost speech frames by bi-directional hybrid weighted smooth interpolation.

[0038] The method of the present invention will be described in detail below in conjunction with the accompanying drawings. The processing flow of the embodiment of the method of the present invention is as follows figure 1 shown, including the following steps:

[0039] Step 1-1. The receiving end buffers the voice data of the "previous voice service data frame" of the received "current frame", and judges whether the "current frame" has been received correctly.

[0040] In the VOIP system based on G.711, the sender of the voice service uses the ITUT G...

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Abstract

The present invention provides a method for compensating lost voice service data frames, the method mainly includes: when the receiving end does not correctly receive the current voice service data frame, judging the received current voice service data frame Whether the previous voice service data frame and the next voice service data frame are active voice signals, perform corresponding operations according to the judgment result to generate voice data respectively; The voice data is synthesized to generate a compensated voice service data frame of the current voice service data frame. The invention can improve the voice call quality in the frame loss environment, and has stronger robustness to background music signals and the like.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for compensating for lost voice service data frames. Background technique [0002] In the VOIP (Voice over IP protocol) system, the voices sent by the two parties in the conversation are encapsulated into IP data packets and transmitted through the IP network. Then, the IP data packets are unpacked at the receiving end and restored to voice. In this way, a real-time conversation between the sending end and the receiving end is realized. [0003] In the VOIP system, in order to ensure that the conversation is carried out in a real-time manner as much as possible, the RTP (Real-time Transport Protocol) transmission protocol is usually used instead of the TCP (Transmission Control Protocol) protocol. Since the RTP protocol is a connectionless and unreliable data transmission protocol, voice service data frames will be lost due to various reasons during transmission, and the lost ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M11/06H04M7/00H04L29/06
Inventor 李立雄
Owner HUAWEI TECH CO LTD
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