Patent ID: 8396215

Claim:
A signal transmission apparatus comprising: a serial-to-parallel converter to convert HD-SDI format serial digital video signals of Link A, containing CH 1 , CH 3 , CH 5 , and CH 7 , and Link B, containing CH 2 , CH 4 , CH 6 , and CH 8 , mapped according to a predetermined transmission standard; a scrambler configured, before performing scrambling, to rewrite a timing reference signal SAV specified as 000h, 000h, 000h, 000h by sequentially rewriting into a line number: LN 0 , LN 0 , LN 1 , LN 1 , following the timing reference signal EAV contained in Link A, in that order, among data of horizontal, lines in Link A that are serial-to-parallel converted by the serial-to-parallel converter, into a predetermined value, configured to apply self-synchronizing scrambling to only data of the rewritten timing reference signal SAV, an active line, a timing reference signal EAV, a line number LN, and an error detection code CRC, configured to perform encoding while setting all the register values in the scrambler to 0 immediately before the timing reference signal SAV, and configured to output at least up to several bits of data following the error detection code CRC; a bit extractor to extract RGB bits only from the data of the timing reference signal SAV, the active line, the timing reference signal EAV, the line number LN, and the error detection code CRC, among data of horizontal lines in Link B that are serial-to-parallel converted by the serial-to-parallel converter; an 8-bit/10-bit encoder configured to subject the RGB bits of Link B extracted by the hit extractor to 8-bit/10-bit encoding; a multiplexing unit configured to multiplex parallel digital data of Link A to which self-synchronizing scrambling is applied by the scrambler and parallel digital data of Link B subjected to 8-bit/10-bit encoding by the 8 bit/10 bit encoder; and a serial digital data generator to generate serial digital data with a predetermined bit rate from the parallel digital data multiplexed by the multiplexing unit.