一种高效的Internet上语音包丢失恢复技术

An efficient packet loss recovery technique for voice over Internet

提出了一种高效的Internet上语音包丢失恢复技术,采用了基于奇偶校验码的加载式前向纠错编码(PPFEC)技术,可以在网络存在丢包情况下无损恢复大部分丢失帧信息。此外,本文将PPFEC技术与语音编码的错误隐藏技术相结合,提出了一种基于保护重要信息的FEC编码,得到更优的解码质量和带宽的性能折衷。客观音质实验表明,本文方法在各种丢包率情况下表现出良好的效果。

This paper presents an efficient packet loss recovery technique for voice over Internet based on parity-based piggy-backed forward error correction technique (PPFEC), which can recover most of the lossy packets during the lossy network. Combining the PPFEC technique with error concealment techniques of speech coding, we also develop an important-information protection based FEC to get a better tradeoff between decoding quality and bandwidth. Experiments show that our approach performs well under various packet loss conditions.