IMA-ADPCM\12345.wav .........\a.wav .........\adpcm_decoder.m .........\adpcm_encoder.m .........\ADPCM演示程序说明文档 V1.0.doc .........\debug.m .........\g721.m .........\main.m .........\pcm.asv .........\toefl.wav .........\txtwrite.m .........\x.txt .........\y.txt IMA-ADPCM