Pulse or digital communications – Transmitters – Amplitude modulation
Reexamination Certificate
2006-08-15
2006-08-15
Burd, Kevin (Department: 2631)
Pulse or digital communications
Transmitters
Amplitude modulation
C375S265000, C375S270000
Reexamination Certificate
active
07092455
ABSTRACT:
A digital VSB transmission system that is able to send supplemental data along with MPEG image/sound data is enclosed. The system initially encodes the supplemental data symbol to generate a parity bit, and it multiplexes the parity bit with a predefined sequence and transmits the multiplexed data to a receiver. The system is compatible with the existing ATSC 8T-VSB receivers that are already on the market. It can have advantages over the other type of VSB transmission systems that transmit only the predefined sequence. In addition, the system according the to the present invention results a improved robustness against ghost and noise signals in a channel compared to systems using only the ½ rate convolutional encoding.
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U.S. Appl. No. 60/198,014, Bretl et al.
Choi In Hwan
Gu Young Mo
Kang Kyung Won
Kwak Kook Yeon
Aghdam Freshteh N
Burd Kevin
Lee, Hong, Degerman, Kang & Schmadeka P.C.
LG Electronics Inc.
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