Patent ID: 8094727
Filing Date: 2012-01-10
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 group formatting unit for mapping a portion of data in the RS frame into a data group and adding known data sequences, RS parity data place holders, main data place holders and MPEG header data place holders to the data group; a deinterleaver for deinterleaving the data group; 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 encoder for trellis encoding the interleaved data.