Pulse or digital communications – Repeaters – Testing
Patent
1992-07-10
1994-06-14
Chin, Stephen
Pulse or digital communications
Repeaters
Testing
375 94, 371 375, 371 43, 348384, 348155, H04L 512
Patent
active
053217250
ABSTRACT:
A method and apparatus for communicating high definition television signals is provided. Video signals are divided into blocks of PCM data. The PCM data is processed using motion estimation and compensation to provide DPCM data. For each block, one of PCM and DPCM data is selected for transmission based on a predetermined criteria. The selected data is compressed using the discrete cosine transform to provide blocks of transform coefficients. The coefficients are quantized to improve their coding efficiency and variable length coded. The variable length coded coefficients are coded using a concatenated coding scheme with a Reed-Solomon outer code and trellis inner code to provide coded signals for transmission. The coded signals are transmitted using QAM.
REFERENCES:
patent: 4483012 (1984-11-01), Wei
patent: 4586182 (1986-04-01), Gallager
patent: 4660214 (1987-04-01), Pahlavan et al.
patent: 5054036 (1991-10-01), Brownlie et al.
patent: 5115453 (1992-05-01), Calderbank et al.
patent: 5901782 (1992-02-01), Krause et al.
Viterbi, et al., "A Pragmatic Approach to Trellis-Coded Modulation," IEEE Communications Magazine, Jul. 1989, pp. 11-19.
Odenwalder, J. P., Error Control Coding Handbook, Section 7.1, "Viterbi-Decoded Convolutional Inner Code and Reed-Solomon Outer Code," Linkabit Corporation, 1976.
W. Paik, "DigiCipher--All Digital, Channel Compatible, HDTV Broadcast System," IEEE Transactions on Broadcasting, vol. 36, No. 4, Dec. 1990, pp. 245-254.
Heegard Chris
Heller Jerrold A.
Krause Edward A.
Lery Scott A.
Paik Woo H.
Chin Stephen
General Instrument Corporation
Lipsitz Barry R.
Phan Hai H.
LandOfFree
Method and apparatus for communicating digital information such does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for communicating digital information such , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for communicating digital information such will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1255044