计算机工程与应用2017，Vol.53Issue(2)：146-150,5.DOI:10.3778/j.issn.1002-8331.1504-0238
音频编码器中导谱频率系数的差错隐藏算法
Error concealment for immittance spectral frequencies coeffi-cients in audio codec
摘要
Abstract
Error concealment for hybrid Algebraic Code Excited Linear Prediction(ACELP)and transform codecs is pro-posed to reduce the effect of the packet loss and network jitter during the audio transmission. When the frame is not success-fully received, its Immittance Spectral Frequencies(ISF)coefficients are reproduced using previous good frames’ISF coefficients. The number and perceptual weight of the previous usable good frames are decided by their correlation to the current frame in ISF distance. The original error concealment methods usually use fixed number of previous good frames to recover the missing frame. When facing with versatile audio inputs, the proposed adaptive algorithm is more effective compared with the original fixed number methods. The objective results show that the proposed algorithm has 42%reduction of spectral distortion for AVS-P10 codec at error frame rate from 1%to 10%. The subject result also validates the advantage of this paper. The algorithm can be used in the error concealment of other parameters like adaptive and fixed codebook.关键词
差错隐藏/导谱频率/导谱频率(ISF)距离/音视频编码标准-第10部分(AVS-P10)Key words
error concealment/immittance spectral frequencies/Immittance Spectral Frequencies(ISF)distance/Audio and Video coding Standard-Part 10(AVS-P10)分类
信息技术与安全科学引用本文复制引用
王衍业,杨玉红,董少龙..音频编码器中导谱频率系数的差错隐藏算法[J].计算机工程与应用,2017,53(2):146-150,5.基金项目
国家自然科学基金（No.61102127，No.61231015，No.61201340，No.61201169，No.61272278）；国家科技重大专项项目（No.2010ZX03004-003-03）；湖北省自然科学基金（No.2012FFB04205）；武汉市晨光科技计划（No.201150431104）。 （）
