Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1989-01-05
1990-01-02
Safourek, Benedict V.
Pulse or digital communications
Spread spectrum
Direct sequence
455174, 455225, 455316, H04B 126
Patent
active
048918245
ABSTRACT:
A muting control circuit is provided in which muting is performed when any one of a plurality of unlock detection signals is detected, indicating circuits is unlocked or when a data error is detected in a demodulator. In this way, reading time can be shortened to the minimum time required for muting. In addition, when one unlock detection circuit is triggered due to a disorder in the input, the unlock detection signal is provided immediately, so that the muting control signal is supplied and muting can be performed even when there is a time delay before the unlock detection circuit detects an unlocked state.
REFERENCES:
patent: 4232393 (1980-11-01), Kumaoka et al.
patent: 4355417 (1982-10-01), Kozak Jr.
patent: 4430742 (1984-02-01), Milleker et al.
patent: 4547902 (1985-10-01), Kasperkovitz
patent: 4691175 (1987-09-01), Ecklund
"Digital Audio Interface", Nikkei Electronics, pp. 109-118:1987.
Katsumura Norimichi
Osawa Nobuhiko
Takamura Yoshinobu
Watanabe Kazuo
Pioneer Electronic Corporation
Pioneer Video Corporation
Safourek Benedict V.
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