Patent ID: 7945844
Filing Date: 2011-05-17
Classification: H03M,H04N

Abstract:
1. An 8VSB digital television signal transmitter for transmitting digital television signal on a carrier wave the modulation of which is responsive to a succession of consecutive fields of modulating signal, each said field of modulating signal being divided into a prescribed number of successive segments of modulating signal, each of said successive segments of modulating signal composed of a prescribed number of eight-modulation-level symbols, each segment of modulating signal beginning with a respective segment synchronizing sequence of common type, an initial one of said segments of each said field of modulating signal containing a respective field synchronization signal, at least most of all later segments of each said field of modulating signal concluding with eight-modulation-level symbols descriptive of a respective portion of one of a succession of convolutionally byte-interleaved data fields, each of said convolutionally byte-interleaved data fields being described within a respective one of said fields of modulating signal, each said data field being divisible into a prescribed number of successive data segments most composed of respective Reed-Solomon forward-error-correction codewords encoding respective data packets, pairs of some of said data segments that are composed of respective Reed-Solomon forward-error-correction codewords in ones of said data fields being grouped with another respective one of said data segments therein that contains parity bit information for linear block coding of eight-bit bytes of the Reed-Solomon forward-error-correction codewords with which it is grouped.