声音的线性预测编码和解码，利用vc的函数直接从mic采集数据或者操作wav文件进行压缩和解压，别情提供回访比较功能。-sound linear forecasting coding and decoding,make use of vc library directly to collect data or operate wav file to compress or decompress ,provide compression function.

IMA_Adpcm算法VC实现，支持WAV文件，压缩比1：4-IMA_Adpcm algorithm VC support WAV documents, the compression ratio 1:4