Patent ID: 6499010
Filing Date: 2002-12-24
Classification: G10L

Abstract:
A method of coding a signal based on a perceptual model, the method comprising the steps of:partitioning the signal into a sequence of successive frames; calculating one or more noise thresholds for each of a plurality of said frames in said sequence, each noise threshold for a particular one of said frames corresponding to a different perceptual coding quality for said particular one of said frames; estimating a bit demand for each of a corresponding one or more of said perceptual coding qualities for each of said plurality of said frames, wherein each estimated bit demand comprises a number of bits which would be used to code a given one of said frames at said corresponding perceptual coding quality; selecting one of said perceptual coding qualities for the coding of a particular one of said frames based upon the estimated bit demand for said perceptual coding quality for said particular one of said frames and further based on one or more bit demands estimated for one or more other ones of said frames; and coding said particular one of said frames based on the noise threshold corresponding to said selected one of said perceptual coding qualities for said particular one of said frames.