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

A method of processing digital broadcast data in a digital broadcasting transmitter, the method comprising:

• generating enhanced data packets including enhanced data and a known data sequence in a packet formatter;
• Reed-Solomon (RS)-coding the enhanced data packets by adding first parity data in an RS encoder;
• interleaving data of the RS-coded enhanced data packets in a data interleaver;
• trellis-encoding the interleaved data in a trellis encoding unit which includes a trellis encoder having at least one memory and a pre-coder having at least one memory, wherein the memories included in the trellis encoding unit are initialized by initialization data at a start of the known data sequence;
• generating second parity data based on the initialization data;
• providing the second parity data to the trellis encoding unit;
• and
• multiplexing the trellis-encoded data with field and segment synchronization signals in a first multiplexer,
• wherein trellis-encoding the interleaved data comprises:
• trellis-encoding one input bit among symbols corresponding to the interleaved data at a coding rate of ½ in the trellis encoder;
• and
• pre-coding the other input bit among the symbols in the pre-coder.

A digital broadcasting receiver for processing digital broadcast data transmitted from a digital broadcasting transmitter, the digital broadcasting receiver comprising:

• a tuner configured to receive the digital broadcast data including a first known data sequence and enhanced data;
• a known data detector configured to detect the first known data sequence from the received digital broadcast data;
• and
• an equalizer configured to compensate for channel distortion in the enhanced data in the received digital broadcast data based on the detected first known data sequence,
• wherein the received digital broadcast data are generated in the digital broadcasting transmitter by:
• generating enhanced data packets including original enhanced data and a second known data sequence in a packet formatter;
• Reed-Solomon (RS)-coding the enhanced data packets by adding first parity data in an RS encoder;
• interleaving data of the RS-coded enhanced data packets in a data interleaver;
• trellis-encoding the interleaved data in a trellis encoding unit which includes a trellis encoder having at least one memory and a pre-coder having at least one memory, wherein the memories included in the trellis encoding unit are initialized by initialization data at a start of the second known data sequence;
• generating second parity data based on the initialization data;
• providing the second parity data to the trellis encoding unit;
• and
• multiplexing the trellis-encoded data with field and segment synchronization signals in a multiplexer, and
• wherein trellis-encoding the interleaved data comprises:
• trellis-encoding one input bit bits among symbols corresponding to the interleaved data at a coding rate of ½ in the trellis encoder;
• and
• pre-coding the other input bit among the symbols in the pre-coder.

A method for processing digital broadcast data transmitted from a digital broadcasting transmitter in a digital broadcasting receiver, the method comprising:

• receiving the digital broadcast data including a first known data sequence and enhanced data;
• detecting the first known data sequence from the received digital broadcast data;
• and
• compensating for channel distortion in the enhanced data in the received digital broadcast data based on the detected first known data sequence,
• wherein the received digital broadcast data are generated in the digital broadcasting transmitter by:
• generating enhanced data packets including original enhanced data and a second known data sequence in a packet formatter;
• Reed-Solomon (RS)-coding the enhanced data packets by adding first parity data in an RS encoder:
• interleaving data of the RS-coded enhanced data packets in a data interleaver:
• trellis-encoding the interleaved data in a trellis encoding unit which includes a trellis encoder having at least one memory and a pre-coder having at least one memory, wherein the memories included in the trellis encoding unit are initialized by initialization data at a start of the second known data sequence;
• generating second parity data based on the initialization data;
• providing the second parity data to the trellis encoding unit;
• and
• multiplexing the trellis-encoded data with field and segment synchronization signals in a multiplexer, and
• wherein trellis-encoding the interleaved data comprises:
• trellis-encoding one input bit among symbols corresponding to the interleaved data at a coding rate of ½ in the trellis encoder;
• and
• pre-coding the other input bit among the symbols in the pre-coder.