Excavating
Patent
1996-08-08
1999-03-23
Chung, Phung M.
Excavating
371 21, 371 30, G06F 1100
Patent
active
058869999
ABSTRACT:
A demultiplexer separates the data obtained by the demodulation into the data for each information medium, and a synchronous word detection state monitor detects the synchronous word contained in a received signal of a predetermined information medium and compares the state in which said synchronous word is detected with the preset standard, and outputs an output stop signal when the synchronous word detection state is worse then the preset standard.
An error-correction decoder subjects the data obtained by the demodulation to an error-correction decoding processing, and an error-correction encoder subjects the decoded data to an error-correction encoding processing. A line quality estimating portion estimates the quality of the line by comparing the data obtained by the error-correction encoding processing with the demodulated data before decoding and an output controller stops outputting the received signal to the external terminal when the line quality is worse than the reference quality.
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patent: 4567591 (1986-01-01), Gray et al.
patent: 4961190 (1990-10-01), Nakajima
patent: 5418815 (1995-05-01), Ishikawa et al.
patent: 5430746 (1995-07-01), Renz
Kojima Jun
Seta Mitsuru
Ueno Tomoyuki
Chung Phung M.
Fujitsu Limited
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