Patent ID: 7430251
Filing Date: 2008-09-30
Classification: H04L,H04N

Abstract:
1. An enhanced VSB transmitter for transmitting main and supplemental data, the enhanced VSB transmitter comprising: a first VSB processor preprocessing original supplemental data packets, the first VSB processor comprising a first error correction coder for coding the original supplemental data packets and a null data inserter for enhancing the coded supplemental data packets by inserting a plurality of null bits into the coded supplemental data packets; a first multiplexer for multiplexing the enhanced supplemental data packets with main data packets according to multiplexing information; and a second VSB processor comprising a second error correction coder for coding the multiplexed data packets and a third coder for converting the coded multiplexed data packets into symbols, wherein the null bits inserted by the null data inserter are included in one of two input signals to the third coder.