Patent ID: 6675148
Filing Date: 2004-01-06
Classification: G10L

Abstract:
A method of compressing digital samples obtained from an audio signal into output bits, the method comprising:dividing the digital samples into one or more frames, each frame including multiple digital samples; computing a first predictor for the digital samples in a frame, wherein the first predictor is characterized by first prediction coefficients; quantizing the first prediction coefficients to produce first predictor bits; dividing the digital samples in a frame into one or more subsets, each subset containing at least one of the digital samples in the frame; computing a subset predictor for at least one of the subsets, wherein the subset predictor is computed using digital samples contained in previous subsets; processing the digital samples for the at least one of the subsets using both the first predictor bits and the subset predictor to produce error samples; entropy coding the error samples to produce codewords bits; and including the first predictor bits and the codeword bits in the output bits.