Patent ID: 8488667
Filing Date: 2013-07-16
Classification: H04L,H04N

Abstract:
1. A digital television (DTV) transmitter comprising: a first randomizer for randomizing enhanced data; a Reed-Solomon (RS) frame encoder for generating an RS frame by adding RS parity data and cyclic redundancy check (CRC) data to the randomized enhanced data; a block processor for: a group formatting unit for mapping the data bytes into data groups and adding known data sequences, RS parity data place holders, main data place holders and MPEG header data place holders to each of the data groups; a deinterleaver for deinterleaving data of the data groups; a packet formatter for: a multiplexer for multiplexing the enhanced data packets with main data packets including main data to generate multiplexed enhanced data packets and multiplexed main data packets; a second randomizer for randomizing the multiplexed main data packets and the MPEG header data in the multiplexed enhanced data packets; a Reed-Solomon (RS) encoder for RS encoding the multiplexed enhanced data packets comprising the randomized MPEG header data with a non-systematic RS encoding scheme and RS encoding the randomized multiplexed main data packets with a systematic RS encoding scheme; an interleaver for interleaving data of the RS-encoded data packets; and a trellis encoding unit for trellis encoding the interleaved data, wherein the trellis encoding unit comprises at least one memory and the at least one memory is initialized at a start of each of the known data sequences.