Transmissions with reduced code rate in 8VSB digital television

Details Transmissions with reduced code rate in 8VSB digital television Transmissions with reduced code rate in 8VSB digital television

2006-11-21

2010-02-23

Fan, Chieh M (Department: 2611)

Pulse or digital communications

Transmitters

Amplitude modulation

C375S269000, C375S270000

Reexamination Certificate

active

07668257

ABSTRACT:
Procedures performed prior to convolutional interleaving of 8VSB digital television signals restrict the alphabet of symbols in novel methods of generating trellis-coded digital television signals that include more robust symbol coding using a restricted alphabet of symbols selected from a full 8VSB symbol alphabet consisting of −7, −5, −3, −1, +1, +3, +5 and +7 normalized modulation levels superposed on a background modulation level. Certain of these novel procedures generate pseudo-2VSB or P-2VSB robust symbol coding with a restricted alphabet of symbols consisting of −7, −5, +5 and +7 normalized modulation levels superposed on a background modulation level. Others of these novel procedures generate prescribed-coset-pattern-modulation or PCPM robust symbol coding intermixing two restricted alphabets of symbols according to a prescribed pattern. One of the two restricted alphabets of symbols used in PCPM consists of −3, −1, +5 and +7 normalized modulation levels superposed on a background modulation level. The other of the two restricted alphabets of symbols used in PCPM consists of −7, −5, +1 and +3 normalized modulation levels superposed on a background modulation level.

REFERENCES:
patent: 6351500 (2002-02-01), Kumar
patent: 6430159 (2002-08-01), Wan et al.
patent: 6973137 (2005-12-01), Birru et al.
patent: 6980603 (2005-12-01), Choi et al.
patent: 7050511 (2006-05-01), Jeong et al.
patent: 2004/0237024 (2004-11-01), Limberg
patent: 2006/0039503 (2006-02-01), Choi et al.

Affiliated with

Also associated with

Rating

Transmissions with reduced code rate in 8VSB digital television does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transmissions with reduced code rate in 8VSB digital television, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmissions with reduced code rate in 8VSB digital television will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4231635