Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1989-01-17
1990-10-23
Harkcom, Gary V.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
G10L 702
Patent
active
049658301
ABSTRACT:
Apparatus for analyzing distortion levels of samples which occur in data compression systems of the type that may be integrated into a data compression system or used as a stand alone analyzer. The apparatus includes a processor that is coupled to the data compression system to provide the distortion analyzing apparatus with necessary input bit allocation and power level data for each sample. Memory storage is coupled to the processor for supplying predetermined unique quantization error values corresponding to each transform coefficient representing samples of digital data in a frame of digital data to be compressed. The program in the processor calculates the estimated distortion value for each of the transform coefficients by multiplying power level values stored in the storage times the predetermined unique quantization corresponding to each transformed coefficient to provide estimated distortion values which may be summed over a frame of digital data to provide an average distortion level for a frame of digital data.
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patent: 4516258 (1985-05-01), Ching et al.
patent: 4535472 (1985-08-01), Tomcik
patent: 4538234 (1985-08-01), Honda et al.
patent: 4573188 (1986-02-01), Lewinter
Barham Steven T.
Hurst Michael J.
Bramson Robert S.
Harkcom Gary V.
Merecki John A.
Sowell John B.
Starr Mark T.
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