Pulse or digital communications – Pulse code modulation
Patent
1995-02-24
1997-08-19
Chin, Stephen
Pulse or digital communications
Pulse code modulation
375365, 360 40, 341 61, 341 95, H04B 1404, H03M 700, G11B 2010
Patent
active
056595778
ABSTRACT:
In a digital information modulating apparatus, first information signal is separated every m bit or bits, and n bit or bits are added to the head of every m bit or bits to change every m bit or bits of the first information signal into every m+n bits of a second information signal, where "m" and "n" denote predetermined natural numbers. The second information is pre-coded into plural pre-coded information signals in accordance with combinations of the added n bit or bits. A determination is made as to whether or not predetermined sync information is present in the pre-coded information signals. A sync detection signal is generated which represents the result of the determination. One of the pre-coded information signals is selected as a modulation-resultant output signal in response to the sync detection signal.
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patent: 5140474 (1992-08-01), Kahlman et al.
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Chin Stephen
Gluck Jeffrey W.
Victor Company of Japan Ltd.
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