Digital television transmitter/receiver and method of processing data in digital television transmitter/receiver

A method for processing enhanced data in a receiver, the method comprising:

• receiving a signal, the signal generated in a transmitter, by a process comprising:
• pre-coding the enhanced data by coding the enhanced data for forward error correction (FEC),
• generating enhanced data packets including the pre-coded enhanced data,
• Reed Solomon-coding (RS-coding) the pre-coded enhanced data in the enhanced data packets by a non-systematic RS coding scheme,
• interleaving the RS-coded enhanced data,
• generating new parity data based on initialization data for trellis initialization,
• outputting the generated new parity data, and
• trellis-encoding the interleaved enhanced data based on 2-bit symbols at a trellis encoder, wherein a memory in the trellis encoder is initialized at a start of a known data sequence, wherein when the trellis encoder is in an initialization mode, the trellis encoder uses data coming from an internal state within the trellis encoder, and wherein the trellis encoder provides modified input data for trellis initialization to a non-systematic RS encoder;
• and
• decoding the received signal.

A digital broadcast receiver comprising:

• a tuner configured to receive a signal, the signal generated in a transmitter, by a process comprising:
• pre-coding the enhanced data by coding the enhanced data for forward error correction (FEC),
• generating enhanced data packets including the pre-coded enhanced data,
• Reed Solomon-coding (RS-coding) the pre-coded enhanced data in the enhanced data packets by a non-systematic RS coding scheme,
• interleaving the RS-coded enhanced data,
• generating new parity data based on initialization data for trellis initialization,
• outputting the generated new parity data, and
• trellis-encoding the interleaved enhanced data based on 2-bit symbols at a trellis encoder, wherein a memory in the trellis encoder is initialized at a start of a known data sequence, wherein when the trellis encoder is in an initialization mode, the trellis encoder uses data coming from an internal state within the trellis encoder, and wherein the trellis encoder provides modified input data for trellis initialization to a non-systematic RS encoder;
• and
• a decoder configured to decode the received signal.

A method for processing enhanced data in a transmitter, the method comprising:

• pre-coding the enhanced data by coding the enhanced data for forward error correction (FEC);
• generating enhanced data packets including the pre-coded enhanced data;
• Reed Solomon-coding (RS-coding) the pre-coded enhanced data in the enhanced data packets by a non-systematic RS coding scheme;
• interleaving the RS-coded enhanced data;
• generating new parity data based on initialization data for trellis initialization;
• outputting the generated new parity data;
• and
• trellis-encoding the interleaved enhanced data based on 2-bit symbols at a trellis encoder, wherein a memory in the trellis encoder is initialized at a start of a known data sequence, wherein when the trellis encoder is in an initialization mode, the trellis encoder uses data coming from an internal state within the trellis encoder, and wherein the trellis encoder provides modified input data for trellis initialization to a non-systematic RS encoder.

A transmitter for processing enhanced data, the transmitter comprising:

• a pre-coder for pre-coding the enhanced data by coding the enhanced data for forward error correction (FEC);
• a packet formatter for generating enhanced data packets including the pre-coded enhanced data;
• a Reed Solomon (RS) encoder for RS-coding the pre-coded enhanced data in the enhanced data packets by a non-systematic RS coding scheme;
• an interleaver for interleaving the RS-coded enhanced data;
• a non-systematic RS encoder for generating new parity data based on initialization data for trellis initialization and outputting the generated new parity data;
• and
• a trellis-encoder for trellis-encoding the interleaved enhanced data based on 2-bit symbols, wherein a memory in the trellis encoder is initialized at a start of a known data sequence, wherein when the trellis encoder is in an initialization mode, the trellis encoder uses data coming from an internal state within the trellis encoder, and wherein the trellis encoder provides modified input data for trellis initialization to the non-systematic RS encoder.