Patent
1992-09-21
1995-04-18
Knepper, David D.
G10L 704
Patent
active
054085802
ABSTRACT:
The compression system utilizes sub-band analysis filters whose bandwidths are chosen to approximate the critical bands of the human auditory system while avoiding the aliasing problems encountered in QMF filter banks designed to provide similar band splitting. One embodiment of the invention may be implemented on a digital computer. The computational requirements of the synthesis filters may be varied in response to the available computational resources of the computer, thereby allowing a single compressed audio signal to be played back in real time on a variety of platforms by trading off audio quality against available computational resources. Similar trade offs can be made in compressing an audio signal, thereby allowing a platform having limited computational capacity to compress a signal in real time.
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Jayasimha Sriram
Morrell William R.
Stautner John P.
Aware Inc.
Knepper David D.
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