VoIP的语音质量受到丢包、延时、时延抖动等因素影响。为提高语音质量,需要进行丢包补偿处理,如采用WSOLA算法。首先介绍了WSOLA算法的原理,然后提出了用PAOLA对其进行优化的方法,最后对恢复语音质量进行了比较。
The quality of VolP is affected by the packet loss, time delay, jitter and other factors. To improve its quality, the packet loss concealment such as WSOLA(Waveform Similarity Overlap-Add) can be used. A new technique based on PAOLA(Peak Alignment Overlap-Add) is proposed to optimize WSOLA, and the quality of the retrieval speech is compared.