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Methods and devices for detecting and repairing error voice frame

A detection method and voice frame technology, applied in the field of communication, can solve the problems of inability to track dynamic changes of voice signals, too simple binary judgment mode, weak CRC verification protection ability, etc., to improve user experience, avoid complete discarding, and improve Dynamically changing effects

Active Publication Date: 2011-04-27
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0016] The CRC verification protection ability is weak, and it cannot detect all important bit transmission errors; and the binary judgment mode is too simple, and cannot flexibly handle bit errors
[0017] In addition, the existing frame loss error concealment method will completely discard the useful information in the error frame and cannot be used effectively; and the parameter substitution cannot track the dynamic changes of the speech signal

Method used

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  • Methods and devices for detecting and repairing error voice frame
  • Methods and devices for detecting and repairing error voice frame
  • Methods and devices for detecting and repairing error voice frame

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Embodiment Construction

[0056] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0057] The first embodiment of the present invention provides an error frame detection method, such as Figure 1A As shown, the method includes:

[0058] S101. In the silent mode, if a voice frame indicating a correct parameter is received, the voice frame parameter is detected according to a preset detection rule, and when the condition specified by the detection rule is met, it is determined that the voice frame is an error voice frame.

[...

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Abstract

The embodiment of the invention provides methods and devices for detecting and repairing an error voice frame, and relates to the field of communication. The error frame can be detected and repaired according to the characteristics of a voice signal and the prior statistic characteristics of a coding parameter. The detection method comprises the following steps of: in a silent mode, receiving a voice frame which is indicated to be correct by the parameter, detecting the parameter of the voice frame according to a preset detection rule, and determining that the voice frame is the error voice frame when the parameter meets the condition specified by the detection rule; and in a voice mode, receiving a voice frame which is indicated to be wrong by the parameter, detecting a silence insertiondescriptor (SID) of the voice frame according to the parameter average value of the voice frame, and determining that the voice frame is an SID frame when the SID meets the detection condition. The embodiment of the invention can be used for the full rate voice coding and decoding of a global system for mobile communications (GSM).

Description

Technical field [0001] The present invention relates to the field of communication, and in particular to a method and device for detecting and repairing speech frame errors. Background technique [0002] GSM (Global System for Mobile Communications, Global System for Mobile Communications) mobile communication system is a typical multi-user communication based on TDMA (Time Division Multiple Access) and FDMA (Frequency Division Multiple Access). Compared with the analog cellular mobile communication system, the capacity of the digital cellular mobile communication system has been greatly improved. [0003] Voice communication is an important application in GSM mobile communication. The GSM system currently uses four encoding and decoding schemes, namely: full rate, enhanced full rate, adaptive multi-rate and half-rate voice. [0004] GSM full-rate voice adopts RPE-LTP LPC (Regular Pulse Excited-Long Term Predition-Linear Predictive Coding, regular pulse excitation-long-term predict...

Claims

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Application Information

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IPC IPC(8): G10L19/00G10L19/005
Inventor 刘加王林芳李明刘小青
Owner HUAWEI TECH CO LTD
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