AN AUDIO COMPRESSION SYSTEM USING MODIFIED TRANSFORM CODING AND DYNAMIC BIT ALLOCATION

In this paper, a new digital audio compression system based on the mod ified transform and dynamic bit allocations is introduced. The modifie d transformation is proposed for the time-frequency representations of signals and the dynamic bit allocations scheme is used to progressive ly quantize the transform coefficients according to the rate distortio n theory. Computer simulation results show that this proposed system, which achieves high audio quality on the rate 4 bits per sample, posse sses low computational complexity suitable for multimedia applications . This coding system can further be operated in case of variable bit r ate to allow application specific ancillary data without drastic loss of signal quality.