摘要:
Methods and apparatus for transmitting and receiving broadcast signals are provided. The method for transmitting a broadcast signal includes encoding mobile data for forward error correction (FEC), encoding signaling data, forming data groups including the encoded mobile data and the encoded signaling data and transmitting a signal frame that includes the data groups.
摘要:
The present technology relates to a data processing device and a data processing method that make it possible to ensure good communication quality in a data transmission using LDPC codes. In group-wise interleave, an LDPC code whose code length is 64800 bits and code rate is 10/15, 11/15, 12/15, or 13/15 is interleaved in a 360-bit group unit. In group-wise deinterleave, a sequence of the LDPC code after group-wise interleave obtained from data transmitted from a transmitting device to the original sequence. The present technology can be applied, for example, to data transmission or the like using the LDPC codes.
摘要:
A transmitter apparatus and a receiver apparatus are provided. The transmitter apparatus includes: an encoder configured to generate a low density parity check (LDPC) by performing LDPC encoding; an interleaver configured to interleave the LDPC codeword; and a modulator configured to map the interleaved LDPC codeword onto a modulation symbol. The modulator maps a bit included in a predetermined group from among a plurality of groups constituting the LDPC codeword onto a predetermined bit in the modulation symbol.
摘要:
A digital broadcasting system for transmitting/receiving a digital broadcasting signal and a data processing method are disclosed. A program table information has an identifier identifying mobile service data and main service data in a broadcasting signal. The program table information is multiplexed with the mobile service data and main service data. Then, broadcast receiving system can receive and output the mobile service data by parsing the program table information and using the identifier.
摘要:
A transmitting system, a receiving system, a method of processing broadcast signals and a method of receiving broadcast signals are disclosed.The method for transmitting a broadcast signal in a transmitter includes encoding mobile data for forward error correction (FEC) to build Reed-Solomon (RS) frames and dividing the built RS frames into RS frame portions, dividing the RS frame portions into Serially Concatenated Convolutional Code (SCCC) blocks and mapping the SCCC blocks to data blocks and scalable data blocks, corresponding to a plurality of data segments, wherein at least one of the SCCC blocks includes one of the data blocks and one of the scalable data blocks, encoding signaling data including a header and a payload, forming data groups including the data blocks and the scalable data blocks, wherein specific data blocks of the data blocks in the data groups include the signaling data having information for a number of ensembles being a collection of services transmitted through the data groups, interleaving data in the data groups, wherein the interleaved data includes a plurality of data segments, and wherein at least one of the plurality of data segments includes a part of one of the data blocks and a part of one of the scalable data blocks and transmitting the interleaved data during slots in a transmission frame.
摘要:
A transmitting system, a receiving system, and a method of processing broadcast signals are disclosed. The method for transmitting a broadcast signal includes encoding mobile data for forward error correction (FEC) to build Reed-Solomon (RS) frames, dividing the built RS frames into a number of RS frame portions, dividing one of the RS frame portions into Serially Concatenated Convolutional Code (SCCC) blocks, mapping the SCCC blocks including the convolution-coded data to mobile data blocks according to a SCCC block mode which identifies relationship between the mobile data blocks and the SCCC blocks, forming a data group including the mobile data blocks, forming mobile data packets including data in the data group and, multiplexing a specified number of the mobile data packets, a first scalable number of the mobile data packets, and a second scalable number of main data packets.
摘要:
A method of processing a digital broadcast signal includes Reed-Solomon (RS) encoding enhanced service data for each column of at least one RS frame payload and adding a Cyclic Redundancy Check (CRC) checksum byte at a right end of each row of the at least one RS frame payload to build at least one RS frame and forming data groups including the enhanced service data in the built RS frame and a plurality of known data sequences. Forming the data groups includes mapping the RS encoded enhanced service data into each of the data groups and inserting a place holder for a non-systematic RS parity into each of the data groups. The method further includes deinterleaving data in each of the data groups including the enhanced service data and the place holder and multiplexing the enhanced service data in each of the formed data groups with main service data.
摘要:
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.
摘要:
An iterative decoder circuit includes an N number of sub-decoders, N−1 of the sub-decoders each being responsive to a baseband signal from one of M number of signal processing circuits. Each of the N−1 number of sub-decoders includes, an inner delay responsive to a baseband signal provided by a corresponding signal processing circuit for generating an inner delayed signal, a modified decoder that receives the inner delayed signal and generates a set partition signal, some of which have less errors than previous set partition signals. An Nth inner delay is responsive to the baseband signal and provides an Nth inner delayed signal. An Nth modified decoder is responsive to the Nth inner delayed signal and to the set partition signal and provides an output signal, wherein the probability of error of the output signal is reduced by correcting errors in some of the set partition signals.
摘要:
A channel equalizer includes a first transformer, an estimator, an average calculator, a second transformer, a coefficient calculator, a compensator, and a third transformer. The first transformer converts normal data into frequency domain data, where a known data sequence is periodically repeated in the normal data. The estimator estimates channel impulse responses (CIR) during known data intervals adjacent to each normal data block. The average calculator calculates an average value of the CIRs. The second transformer converts the average value into frequency domain data. The coefficient calculator calculates equalization coefficients using the average value, and the compensator compensates channel distortion of each normal data block using the coefficients. The third transformer converts the compensated data block into time domain data.