Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Patent
1996-09-20
1998-03-03
Chin, Stephen
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
375259, 375316, 375295, 341 67, 358431, 371 21, H04B 166
Patent
active
057243913
ABSTRACT:
A variable length data transmission apparatus is provided which includes a transmitter and a receiver. The transmitter splits input variable length data into first code blocks having a block length k to convert them into a plurality of first error-correcting codes having a code length n and including k information symbols. When a data length of the variable length data is not a multiple of the block length k, the transmitter converts part of the variable length data which should be protected from errors with a higher degree of priority into a code block having a length shorter than the block length k and adds dummy bits to the second code block to convert the dummy bit-added second code block into a second error-correcting code, after which the dummy bits are removed from the second error-correcting code to provide a third error-correcting code. The receiver splits a code sequence transmitted from the transmitter into the first and third error-correcting codes for correcting errors arising in the first and third error-correcting codes. The receiver adds the same dummy bits as used in the transmitter to the third error-correcting code to correct the errors in the third error-correcting code, after which the dummy bits are removed from the third error-correcting code.
REFERENCES:
patent: 4593267 (1986-06-01), Kuroda et al.
patent: 5111292 (1992-05-01), Joseph et al.
patent: 5122875 (1992-06-01), Raychaudhuri et al.
patent: 5168356 (1992-12-01), Acampora et al.
patent: 5471594 (1995-11-01), Stone
patent: 5502571 (1996-03-01), Decotignie et al.
Masuda Michinori
Takeuchi Shunichi
Chin Stephen
Deppe Betsy L.
Matsushita Electric - Industrial Co., Ltd.
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