Bit interleaving method in dvb‑t2 standard

Abstract

The invention discloses a bit-interleaving method in a DVB-T2 standard. According to the method, bit data of an FEC frame are sequentially stored in a storage space according to the precedence order of bit numbers, when bit data are read, the bit data of the FEC frame are logically divided into an M-row and N-column matrix according to the instructions in a reference list, the bit numbers of the bit data of the first row of each column are connected with the bit numbers of the bit data of the last row of the former column; polling is conducted on row data according to the precedence order of the row numbers, then polling is conducted on column data according to the precedence order of the column numbers, and the row number and the column number of each bit datum are obtained; whether the current row number of the current bit data is larger than a corresponding deviation value in the reference list is judged; if the current row number of the current bit data is larger than or equal to the corresponding deviation value in the reference list, the deviation value is subtracted from the current bit number of the current bit data to obtain a first bit number, the bit data corresponding to the first bit number are read, and otherwise the current bit number is plus the matrix rows and minus the deviation value to obtain a second bit number, and the bit data corresponding to the second bit number are read. The bit-interleaved method can lower timing sequence delay and save recourses.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a bit interleaving method in the DVB-T2 standard. Background technique [0002] DVB-T2 is the second-generation European digital terrestrial television broadcasting transmission standard, and the DVB-T2 standard requires bits to be interleaved. Bit interleaving includes parity interleaving of LDPC (Low Density Parity Check Code, Low Density Parity Check Code) frames and row-column interleaving of FEC (Forward Error Correction, forward error correction) frames. The main purpose of interleaving is to regularly scramble each bit of data in the LDPC or FEC frame. Even if an error occurs during wireless transmission of the LDPC or FEC frame, it can be corrected during decoding to ensure the quality of signal transmission. . [0003] For the row-column interleaving of the FEC frame, the way of listing and row-out is usually adopted, that is, the bit data is written into the m...

AI Technical Summary

Problems solved by technology

[0009] In practical applications, the existing DVB-T2 standard requires the use of dividers and multipliers, resulting in a waste of logic resources. At the same time, the output of the divider has considerable delay, and the multiplier and divider also have strict timing synchronization requirements. , so it also causes a waste of timing resources

Images