摘要:
The present invention relates to a method for generating, by a transmission device, a packet in a broadcasting and/or communication system, the method comprising the steps of: generating a first source symbol block consisting of one or more source symbols with the same length using a source packet block consisting of one or more source packets; performing a forward error correction (FEC) coding operation on the first source symbol block; generating a second source symbol block containing information about each source packet constituting the source packet block; and generating a second recovery symbol block with one or more recovery symbols by performing an FEC coding operation on the second source symbol block.
摘要:
A rate matching processing method and apparatus for coding are disclosed. The method includes: dividing coded bits output by a Polar encoder into M groups, and performing interleaving processing on coded bits in the 1 st group to the M th group separately, where M is a positive integer; performing bit reduction processing on coded bits in multiple groups of the M groups according to a size of a virtual IR buffer module, coding bits, on which the reduction processing is performed, in first groups of the 1 st group to the M th group, outputting the coded bits to the virtual IR buffer module, and discarding coded bits in last groups of the 1 st group to the M th group; comparing a quantity of available bits of a transmission channel with a quantity of coded bits, in multiple groups, stored in the virtual IR buffer module, and performing, according to a comparison result, repetition or reduction processing on the coded bits, in the multiple groups, stored in the virtual IR buffer module; and performing tandem processing on coded bits on which the repetition or reduction processing is performed, to generate one bit stream, and sending the bit stream through the transmission channel.
摘要:
The present invention discloses a data processing method and system based on a quasi-cyclic LDPC, where the method includes: calculating a magnitude of an information bit of the quasi-cyclic LDPC (S101); obtaining service data having the same size as service data space in a storage unit (S102); when the size of the service data is less than the magnitude of the information bit of the quasi-cyclic LDPC, calculating a difference value between the magnitude of the information bit of the quasi-cyclic LDPC and the size of the service data, and filling the service data with the same amount of known data as the difference value (S103); coding the filled service data to obtain redundancy check data corresponding to the service data (S104); and sending the service data and the redundancy check data to a corresponding physical location in the storage unit (S105). The solution can ensure that when a code length of the quasi-cyclic LDPC is constant, the code length ideally adapts to internal space of the storage unit, and the quasi-cyclic LDPC has a relatively high error correction capability, thereby improving reliability and service life of the storage unit.
摘要:
A data communication system and a rate matching method to be applied in such data communication system are disclosed. It is possible to use one or both of a non-systematic code (such as a convolutional code or linear block code) and a systematic code (such as a turbo code). According to one aspect, the data communication system comprises a rate matching means with first to third rate matching means for receiving systematic bit stream, first parity bit stream, and second parity bit stream. At least one of the rate matching means rate matches a determined number of parity bits in a respective parity bit stream and a part of the encoded bits are rate matched in each of the rate matching means respectively, and can be controlled according to rate matching parameters. Corresponding bits to be rate matched among the encoded bits are controlled by a subtraction function.
摘要:
A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for receiving broadcast signals, the apparatus comprises a receiver to receive the broadcast signals, a demodulator to demodulate the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme, a frame parser to parse at least one signal frame from the demodulated broadcast signals, wherein a signal frame includes service data corresponding to each of a plurality of physical paths, a time deinterleaver to time deinterleave service data in the at least one signal frame, a decoder to decode the time deinterleaved service data.
摘要:
A transmission device and reception device for digital data that have excellent resistance to noise are provided. An encoder (11-1) of this disclosure, included in a transmission device (1) of this disclosure, applies LDPC encoding to digital data using a unique check matrix for each code rate by using a check matrix in which, taking a check matrix initial value table established in advance for each code rate at a code length of 44880 bits as initial values, 1 entries of a partial matrix corresponding to an information length appropriate for a code rate of 93/120 are allocated in the column direction over a cycle of 374 columns. A demodulator (23) of this disclosure, included in a reception device (2) of this disclosure, decodes digital data encoded by the encoder (11-1).