Data compression system and method for audio signals

Details Data compression system and method for audio signals Data compression system and method for audio signals

1987-08-25

1989-01-31

Kemeny, Emanuel S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

128696, 36441306, 36472419, 375122, G10L 500

Patent

active

048022225

ABSTRACT:
Audio signals such as ECG, speech and music are digitally processed to reduce the bit-rate needed for accurate transmission, known as minimizing the entropy of the signal. The transmitter features a digital compression filter with zeros restricted to certain points on the unit circle, and Huffman encoding for transmission. The receiver features a digital decompression filter with poles at the zero locations, but shifted inside the unit circle to prevent error-ramp build-up.

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patent: 4546342 (1985-10-01), Weaver et al.
Ruttimann et al., "IEEE Transactions on Biomedical Engineering", vol. BME-26, No. 11, Nov. 1979, pp. 613-623.
Bertrand et al., "Proceedings of the IEEE", vol. 65, No. 5, May 1977, pp. 714-721.
Ripley et al., "A Computer System for Capturing Transient Electrocardiographic Data", Pro. Comput. Cardiol 1976, pp. 439-445.

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