| 摘要 |
A digital transmission system and its method are provided to improve utilization of a transport stream by transmitting a portion desired to be emphasized of normal data as valid data. A stream generating unit(110) generates a transport stream. An exciter unit(120) codes the generated transport stream and outputs the same. A randomizing unit(121) randomizes the generated transport stream. A stuffer unit(122) checks a predetermined non-usage region in the randomized transport stream and inserts valid data thereinto. An RS encoder(123) encodes the transport stream outputted from the stuffer unit. An interleaver unit(124) interleaves the encoded transport stream. A trellis encoder unit(125) performs trellis encoding on the interleaved transport stream. A transmission unit(126) modulates the trellis-encoded transport stream, and outputs the same.
|
