Network audio packet loss concealment method and device

A packet loss masking and network audio technology, applied in voice analysis, instruments, etc., can solve problems such as unsatisfactory voice effects and packet loss, achieve clear voice effects, and improve audio quality

Active Publication Date: 2015-02-11
CHINA TELECOM CORP LTD
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Problems solved by technology

[0004] However, in the case of poor network environment, serious packet loss may occur, and the existing iLBC packet loss concealment technology still cannot obtain satisfactory voice effect. Therefore, it is necessary to propose a packet loss concealment In a relatively high network environment, you can still get a relatively clear voice effect

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  • Network audio packet loss concealment method and device
  • Network audio packet loss concealment method and device
  • Network audio packet loss concealment method and device

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Embodiment Construction

[0020] 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 only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0021] In order to obtain a relatively clear voice effect in a network environment with a relatively high packet loss rate, the present invention adopts the bidirectional prediction error concealment technology to further improve the audio quality, especially in a network environment with a relatively...

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Abstract

The invention discloses a network audio packet loss concealment method and device, relating to the field of audio transmission. The method comprises the steps of decoding an audio stream subjected to packet loss, reversing audio signals obtained through decoding, then, carrying out packet loss compensation on the audio signals and the reversed audio signals respectively, reversing the compensated reversed audio signals again, and finally, carrying out magnitude average on the compensated audio signals of two channels, so as to obtain output signals. By the bidirectional-prediction error concealment technology, the quality of audio can be further improved, and particularly, a relatively clear voice effect can be obtained in the network environment that the packet loss rate is relatively high.

Description

technical field [0001] The invention relates to the field of audio transmission, in particular to a network audio packet loss masking method and device, thereby reducing the sense of discontinuity caused by network audio stream due to packet loss and improving the auditory effect of the network audio stream. Background technique [0002] In VOIP (Voice over Internet Protocol, Internet telephony) applications, due to some reasons such as network quality, packet loss may occur in the audio stream, which may seriously affect the voice quality and cause interference to the call. [0003] iLBC (internet Low Bit Rate Codec, Internet Low Bit Rate Coding) algorithm is a low bit rate speech coding algorithm based on CELP (Code Excited Linear Prediction, Code Excited Linear Prediction Coding), its excellent voice quality, outstanding long-term The prediction method and Packet Loss Concealment (PLC) technology have solved the problem of voice transmission on the Internet well. iLBC is...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/005
Inventor 屈振华江洪尹梅马涛张海涛龙显军陈珣王刚王哲区洪辉黄梓南胡文胜许捷翰叶文超刘豪郭英
Owner CHINA TELECOM CORP LTD
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