A Scheme of Low-frequency Sampled Audio Compression Based on Mp3 Frame
Lei Xie · Jisuanji gongcheng · 2003
A scheme of low-frequency sampled audio compression is proposed here. Audio signal is divided into 8 subbands by hybrid filterbanks, and different numbers of bits and quantizers are allocated to different subbands based on result of psychoacoustic analysis. At last, samples after being quantized are coded with Huffman codes. By using Mp3 compress frame, this scheme can provide perceptually lossless compression of 20kbps with 8kHz sampled audio signal.