Patent ID: 6463405
Filing Date: 2002-10-08
Classification: G10H,H04B

Abstract:
A method for subband encoding a digital audio signal comprising:dividing the digital signal into a plurality of frames; dividing each of the plurality of frames into a plurality of frequency subbands; assigning each of the plurality of subbands an indicator selected from the group consisting of positive, zero, and negative, wherein the indicator selected is based on a polarity and a magnitude of the subband and without regard to a psychoacoustic model, the indicator comprising a two bit word, one bit representing the polarity of the subband and one bit representing the magnitude of the subband; assigning each of the plurality of subbands one of a plurality of scale factors, each scale factor comprising an eight bit word having a resolution of one decibel per scale factor; and generating a digital word for the plurality of frames, the digital word having a scale factor section including the scale factors for the plurality of subbands in the plurality of frames, and a sample data section including the indicators for the plurality of subbands in the plurality of frames.