Pulse or digital communications – Repeaters – Testing
Patent
1989-05-18
1990-10-02
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
360 32, H04B 1404
Patent
active
049612042
ABSTRACT:
A PCM signal processing apparatus for recording or reproducing a PCM signal. The PCM signal reproducing apparatus of the invention is constituted by: a data addition circuit for receiving a first signal composed of n bits per word (n being an integer) and a second signal composed of n' bits per word (n' being an integer) as mode inputs different from each other, and for adding fixed data of (n-n') bits to every word of the second signal to thereby generate a third signal; a first switch device for receiving the first and third signals and for selectively outputting one of the first and third signals; a symbol generation circuit for converting every word of the output of the first switch device into symbol data of m.times.l bits (n>l); a signal processing circuit for performing at least interleave processing, error correction code generating processing, and addition of a synchronizing signal, on the output of the symbol generation circuit, to thereby generate a first data frame; a data deletion circuit for deleting the fixed data from the first data frame of the signal processing circuit to thereby generate a second data frame; and a second switch devices for receiving the first data frame from the signal processing circuit and the second data frame from the data deletion circuit.
REFERENCES:
patent: 4523237 (1985-06-01), Fukuda et al.
patent: 4622600 (1986-11-01), Okamoto et al.
patent: 4816926 (1989-03-01), Moriwaki et al.
Arai Takao
Saito Seiichi
Takeuchi Toshifumi
Tanaka Hiromichi
Bocure Tesfaldet
Hitachi , Ltd.
Safourek Benedict V.
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