Pulse or digital communications – Repeaters – Testing
Patent
1991-10-03
1993-11-02
Kuntz, Curtis
Pulse or digital communications
Repeaters
Testing
375121, H04B 138, H04L 516
Patent
active
052589994
ABSTRACT:
An interface transceiver (16) circuit and method for communicating transceiver control and status information between a signal processor (20) and either an audio source (12) or an audio sink (24). During transmission of digital audio data from audio source (12) and signal processor (20), a comparator (49) compares a cyclic redundancy check (CRCC) byte of a block of channel status information to a theoretical CRCC byte generated by a CRC generator (48). By comparing actual and theoretical CRCC bytes, comparator (49) indicates in a single bit whether audio data was transmitted correctly. Remaining bits of the CRCC byte are then used to transfer status information corresponding to transceiver (16). Similarly, during transmission of digital data from signal processor (20) to audio sink (24), a parity bit of a subframe of the digital data is used to transfer programming information from signal processor (20) to audio sink (24).
REFERENCES:
patent: 3978449 (1976-08-01), Sanders et al.
patent: 4677611 (1987-06-01), Yanosy, Jr. et al.
patent: 4706080 (1987-11-01), Sincoskie
patent: 5025500 (1991-06-01), Phinney
Computer Communications published by ipc science and technology press vol. 2, No. 4, Aug. 1979 pp. 170-171.
"AES Recommended Practice for Digital Audio Engineering--Serial Transmission Format for Lin early Represented Digital Audio Data" published by Audio Engineering Society in 1985, pp. 1-9.
"CP-340 Digital Audio Interface" published by the Standards of Electronic Industries Association of Japan in Sep. 1987, pp. 1-32.
Kloker Kevin L.
Liu Clif
Wernimont Thomas L.
Apperley Elizabeth A.
Kuntz Curtis
Motorola Inc.
Webster Bryan
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