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Fast signal processor encodes 48 kHz/16-bit audio into 3-bit in real time

Ein schneller Signalprozessor zur Codierung von 16-bit Audiosignale in 3-bit-Signale bei 48 kHz
: Brandenburg, K.; Kapust, R.; Seitzer, D.; Eberlein, E.; Gerhauser, H.; Popp, H.; Schott, H.

IEEE Acoustics, Speech, and Signal Processing Society -ASSP-:
ICASSP 88, 1988 International Conference on Acoustics, Speech, and Signal Processing : April 11 - 14 1988, New York Hilton, New York City, USA. Vol. 5: A & U : audio & electroacoustics, underwater signal processing
Piscataway, NJ: IEEE, 1988
International Conference on Acoustics, Speech, and Signal Processing (ICASSP) <13, 1988, New York/NY>
Conference Paper
Fraunhofer IIS A ( IIS) ()
digitale Signalverarbeitung; Mikroprozessor; Codierung; Verzerrung; Musik; Codierer; Decodierer; Datenkompression; Echtzeitbetrieb; real time system

A real-time implementation of a source coding method allowing bit rate reduction from 16 bits to 3 bits per sample at sampling rates up to 48 kHz is described. Using an adaptive transform coding technique optimized for low computing complexity and a system based on the AT&T DSP 32 single-chip signal processor, a very good compromise between sound quality and hardware complexity has been achieved. Distortions were audible only by trained listeners for critical pieces of music. One signal-processor module is needed for each of the two coders and decoders. Each one fits on a single-height Eurocard.