Robust DTV signals transmitted at two thirds the code rate...

Details Robust DTV signals transmitted at two thirds the code rate... Robust DTV signals transmitted at two thirds the code rate...

2011-05-17

2011-05-17

Chase, Shelly A (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

Reexamination Certificate

active

07945844

ABSTRACT:
Redundant coding of 8VSB digital television signals using (12, 8) linear block codes reduces code rate by a third. The parity bits for the (12, 8) block coding of the bytes in a pair of (207, 187) Reed-Solomon codewords are transmitted in a 207-byte segment of data. The information bits contained in each pair of (207, 187) Reed-Solomon codewords are subsequently transmitted in 207-byte segments of data that can be usefully received by legacy digital television receivers. A preferred (12, 8) linear block coding is the equivalent of Gray coding followed by rearranged shortened (15, 11) Hamming coding followed by Gray decoding. Digital television transmitter apparatus capable of generating such redundantly coded signal is described. So is digital television receiver apparatus capable of receiving and decoding such redundantly coded signal to secure more robust reception.

REFERENCES:
patent: 6823489 (2004-11-01), Wittig et al.
patent: 7111221 (2006-09-01), Birru et al.

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