Frame erasure concealment method used for wideband embedded speech codec

ZHU Heng; BAO Chang-chun; LI Rui

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Frame erasure concealment method used for wideband embedded speech codec

更新时间：2024-10-14

- Frame erasure concealment method used for wideband embedded speech codec
- Issue 6, Pages: 1-7(2008)
- 作者机构：
  
  1. 北京工业大学电子信息与控制工程学院语音与音频信号处理研究室
  2. 北京工业大学电子信息与控制工程学院语音与音频信号处理研究室,北京,100124
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN912.3
- Published：2008
- 稿件说明：
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ZHU Heng, BAO Chang-chun, LI Rui. Frame erasure concealment method used for wideband embedded speech codec[J]. 2008, (6): 1-7.
DOI：

ZHU Heng, BAO Chang-chun, LI Rui. Frame erasure concealment method used for wideband embedded speech codec[J]. 2008, (6): 1-7. DOI：

摘要

提出了一种宽带嵌入式编解码器的帧擦除隐藏方法。该方法在解码端将丢失帧分为静音、浊音、清音、清音向浊音的过渡、浊音向清音的过渡的语音类型

并根据语音类型对激励信号的能量采取对应的控制和调整。为了和宽带嵌入式编码器的结构相匹配

丢失帧的自适应码书根据前一帧的码流来恢复。为了增强编解码器的顽健性

在编码端采取了控制自适应码书贡献的技术。所建议的帧擦除隐藏技术不需要额外的比特和延迟

方法简单

恢复效果好

在提交给ITU-T的嵌入式变速率候选编码方案中得到使用。

Abstract

An efficient frame erasure concealment（FEC）method for wideband embedded speech codec was proposed.The erased speech frame was classified as voiced

unvoiced

silence

unvoiced transit to voiced and voiced transit to unvoiced at decoder.The energy of excitations was carefully controlled based on the classification of the speech.To match with the configuration of the embedded speech codec

the adaptive codebook for erased frame was recovered with the last frame’s bit-stream.For increasing the robustness of the codec

the contribution of adaptive codebook was prop-erly constrained at encoder.The proposed FEC method is very simple and has a good performance without extra delay and bits requirements in codec.This method has been applied to an embedded variable bits rate codec submitted to ITU-T as a candidate.

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Related Author

JIA Mao-shen

XIN Jie

BAO Chang-chun

JIA Mao-shen

LIU Xin

Zhong-jie ZHU

Yu-er WANG

Dong-jie LI

Related Institution

Speech and Audio Signal Processing Lab,School of Electronic Information and Control Engineering,Beijing University of Technology

Ningbo Key Lab. of DSP, Zhejiang Wanli University

Physical Engineering College,Zhengzhou University

School of Electronic Information and Control Engineering,Beijing University of Technology

北京工业大学电子信息与控制工程学院

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