Abstract: An apparatus for processing streams includes a trellis encoding unit which changes a part of streams with parities, an RS re-encoding unit which corrects at least one of parity part and data part of the streams, and generates new codewords to match the changed part of the streams, and a multiplexer which re-constructs the streams with the generated codewords.

Abstract: A trellis encoder for trellis encoding a dual transmission stream. A first multiplexer selectively outputs one of a predetermined first bit of the dual transmission stream and a value stored in a first memory according to an external control signal. A first adder adds the value output from the first multiplexer to the value stored in the first memory, outputs the added value, and stores the added value in the first memory. A second multiplexer selectively outputs one of a predetermined second bit of the dual transmission stream and a value stored in a second memory according to the external control signal. A second adder adds the value output from the second multiplexer to the value stored in the second memory and stores the added value in a third memory. Thus, an initialization is effectively performed before trellis encoding is performed.

Abstract: A digital broadcasting transmission system processes dual transport stream (TS) including multi turbo streams. The digital broadcasting transmission system includes a turbo processor to detect a turbo stream from a dual transport stream (TS) which includes a multiplexed normal stream and a turbo stream, encoding the detected turbo stream and stuffing the encoded turbo stream into the dual TS; and a transmitter to trellis-encode the processed dual TS, and to output the resultant stream, wherein the turbo processor encodes the turbo stream using a plurality of turbo processors. Accordingly, a plurality of turbo streams may be processed in parallel.

Abstract: Disclosed is a digital broadcasting transmission/reception system having an improved reception performance and in a signal-processing method thereof. A digital broadcasting transmitter comprises a TS stream generator for inputting robust and normal packets having stuff bytes in predetermined positions and generating dual TS stream by inserting the robust packets between the normal packets; a randomizer for randomizing the dual TS stream; a stuff byte exchanger for replacing the stuff bytes of a randomized data streams from the randomizer to a predetermined known data; and an encoder for encoding a data streams to which the known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization, so that the digital broadcasting reception performance can be improved at poor multipath channels.

Abstract: Method and apparatus for scanning channels of a broadcast receiver are provided. The channel scanning method includes determining whether to perform an entire channel scanning operation or a partial channel scanning operation in response to a channel scan command, if the entire channel scanning operation is determined to be performed, performing the entire channel scanning operation by scanning all channels and storing channel information regarding a channel in which a broadcast signal exists in a channel map, and if the partial channel scanning operation is determined to be performed, performing the partial channel scanning operation by scanning a channel which is not registered in a pre-created channel map, and storing channel information regarding the non-registered channel in which a broadcast signals exists in the non-registered channel map.

Abstract: A digital broadcasting transmitter, a turbo stream processing method thereof, and a digital broadcasting system having the same. The digital broadcasting transmitter includes a first compressor, forming a normal stream by compressing audio and video signals in a first compression format, a second compressor, forming a turbo stream by compressing the audio and video signals in a second compression format, a transport stream (TS) constructor, compressing the turbo stream in an H.264 format and forming the dual transfer stream by multiplexing the normal stream and the turbo stream, and a TS processor, robustly processing the dual transfer stream transmitted from the TS constructor, thus enhancing the transmission efficiency.

Abstract: A method of resetting a trellis-coded modulation (TCM) encoder to a known state, the TCM encoder including a reset input that resets the TCM encoder to the known state when held at a reset level for a plurality of symbol clock cycles, the method including identifying an event to occur in the future that requires the TCM encoder to be reset to the known state; and holding the reset input of the TCM encoder at the reset level beginning the plurality of clock symbol cycles before a time the event will occur so that the TCM encoder will be reset to the known state immediately before the event occurs.

Abstract: Digital broadcasting transmission and reception devices and methods thereof are provided. The digital broadcasting transmission device includes a randomizer which randomizes a dual transport stream including a normal stream and a robust stream, a supplementary reference signal inserter which inserts a certain supplementary reference signal into a stuffing region included in the randomized dual transport stream, a Reed-Solomon (RS) encoder which adds a parity into a parity region included in the dual transport stream, a robust processor which configures a new dual transport stream by convolution-encoding the robust stream among the dual transport stream, an interleaver which interleaves the configured dual transport stream, a trellis encoder which trellis-encode the interleaved dual transport stream, and a modulator which transmits the trellis-encoded dual transport stream. Accordingly, a sub-channel can be provided in which the robust data and the supplementary reference signal will be transmitted.

Abstract: A digital broadcast transmitting/receiving system and a signal processing method thereof that can improve the receiving performance of the system. A digital broadcast transmitter has a randomizer to randomize an input data stream which has null bytes being inserted at a specified position, a multiplexer to output a data stream formed by inserting specified known data into the position of the null bytes of the randomized data stream, an encoder to encode the data stream outputted from the multiplexer, and a modulator/RF-converter to modulate the encoded data, RF-convert the modulated data and transmit the RF-converted data. The receiving performance of the digital broadcast transmitting/receiving system can be improved even in a multi-path channel by detecting the known data from the received signal and using the known data in synchronization and equalization in a digital broadcast receiver.

Abstract: A digital broadcast transmitting and receiving system and a signal processing method thereof that improves the receiving performance of the system. A digital broadcast transmitter includes a randomizer to receive and randomize a data stream into a specified position of which stuff bytes are inserted, a replacement sequence generator to generate known data including a predefined sequence, a stuff-byte exchange unit to insert the known data into the specified position of the data stream into which stuff bytes are inserted, an encoder to encode the data stream output from the stuff-byte exchange unit for an error correction, and a transmission unit to modulate the encoded data stream, RF-convert the modulated data stream and transmit the RF-converted data. The digital broadcast receiving performance is improved even in an inferior multi-path channel by detecting the known data from the received transmission and using the known data for synchronization and equalization in a digital broadcast receiver.

Abstract: A digital broadcasting reception apparatus and robust stream decoding method thereof. The digital broadcasting reception apparatus includes a robust decoder that decodes a robust stream of a dual transport stream where a normal stream and the robust stream are combined. The robust decoder includes a first decoder that trellis-decodes the robust stream; a robust deinterleaver that interleaves the trellis-decoded robust stream; a second decoder that convolution decodes the deinterleaved robust stream; a robust interleaver that interleaves the convolution-decoded robust stream; and a frame formatter that adds decoded data of the second decoder to a part that corresponds to a position of the robust stream of a frame where the normal stream and the robust stream are mixed. Accordingly, a receiver of a simple structure can be provided.

Abstract: A digital broadcasting transmitter, a turbo stream processing method thereof, and a digital broadcasting system having the same. The digital broadcasting transmitter includes a first compressor, forming a normal stream by compressing audio and video signals in a first compression format, a second compressor, forming a turbo stream by compressing the audio and video signals in a second compression format, a transport stream (TS) constructor, compressing the turbo stream in an H.264 format and forming the dual transfer stream by multiplexing the normal stream and the turbo stream, and a TS processor, robustly processing the dual transfer stream transmitted from the TS constructor, thus enhancing the transmission efficiency.

Abstract: Disclosed is a digital broadcasting transmission/reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a randomizer for inputting dual TS stream consists of robust and normal packets having stuff bytes inserted in predetermined positions and randomizing the dual TS stream; a stuff byte exchanger for replacing the stuff byte of a randomized data stream from the randomizer to a predetermined known data; and an encoder for encoding a data streams to which the known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization, so that the digital broadcasting reception performance can be improved at poor multipath channels.

Abstract: A service relay device is provided. The service relay device includes a receiving unit which receives a service signal, and a service processing unit which changes information regarding an order of changing frequency channels included in the received service signal, using replacement frequency channels, and broadcasts the service signal. The service processing unit includes a detecting unit which detects the information regarding the order of changing frequency channels, a storage unit which stores information regarding replacement frequency channels, an information processing unit which replaces the information regarding the order of changing frequency channels, using the replacement frequency channels stored in the storage unit, and a relay unit which broadcasts a service signal. As a result, service signals are provided stably even in the fringe area.

Abstract: The method for transporting a digital broadcast stream includes: receiving a transport stream, including mobile broadcast data that is placed in at least a part of a normal data area allocated to normal data and signaling data that includes an FIC chunk header with a variable length; decoding the signaling data; and decoding the mobile data using the decoded signaling data.

Abstract: A digital broadcast transmitter and a digital broadcast receiver for 3-dimensional (3D) broadcasting, and methods for processing a steam thereof. The digital broadcast transmitter includes: a stream processor which processes first and second data parts of an input signal differently from each other, wherein the first data part is to constitute a 2-dimensional (2D) image, and the second data part is to constitute a 3D image; and a transmitter which transmits a transport stream (TR) including the first and second data parts processed by the stream processor.

Abstract: A method and apparatus for transmitting and receiving digital broadcasting. The method includes transmitting and receiving main broadcast data and supplemental broadcast data, wherein the main broadcast data is able to independently provide a basic broadcast service and the supplemental broadcast data is able to provide an extended broadcast service in combination with the main broadcast data, by using methods that are different from each other and thus the extended broadcast service may be provided.

Abstract: A digital broadcast transmitting/receiving system and a signal processing method thereof that can improve the receiving performance of the system. A digital broadcast transmitter has a randomizer to randomize an input data stream which has null bytes being inserted at a specified position, a multiplexer to output a data stream formed by inserting specified known data into the position of the null bytes of the randomized data stream, an encoder to encode the data stream outputted from the multiplexer, and a modulator/RF-converter to modulate the encoded data, RF-convert the modulated data and transmit the RF-converted data. The receiving performance of the digital broadcast transmitting/receiving system can be improved even in a multi-path channel by detecting the known data from the received signal and using the known data in synchronization and equalization in a digital broadcast receiver.

Abstract: Disclosed is a digital broadcasting transmission/reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a randomizer for inputting dual TS stream consists of robust and normal packets having stuff bytes inserted in predetermined positions and randomizing the dual TS stream; a stuff byte exchanger for replacing the stuff byte of a randomized data stream from the randomizer to a predetermined known data; and an encoder for encoding a data streams to which the known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization, so that the digital broadcasting reception performance can be improved at poor multipath channels.

Abstract: A digital broadcast transmitting/receiving system and a signal processing method thereof that can improve the receiving performance of the system. A digital broadcast transmitter has a randomizer to randomize an input data stream which has null bytes being inserted at a specified position, a multiplexer to output a data stream formed by inserting specified known data into the position of the null bytes of the randomized data stream, an encoder to encode the data stream outputted from the multiplexer, and a modulator/RF-converter to modulate the encoded data, RF-convert the modulated data and transmit the RF-converted data. The receiving performance of the digital broadcast transmitting/receiving system can be improved even in a multi-path channel by detecting the known data from the received signal and using the known data in synchronization and equalization in a digital broadcast receiver.