MULTIMEDIA PLAYBACK SYSTEM

摘要

A method for operating a digital computer to generate a decompressed audio/visual signal from compressed material stored on a disk drive. The incoming compressed stream is decoded by a decoder (602) and de-quantizer (604) to generate set of transform coefficients (615) which are used to reconstruct the time domain signal. The computational requirements of the filters, which coefficients and frequency cut-offs are stored in memory (615), used to synthesize the decompressed signal are varied in response to the available computational resources of the computer, thereby allowing a single compressed audio/visual program to be played back in real time on a variety of platforms by trading off audio/visual quality against available computational resources.