Patent ID: 8081716

Claim:
A data, and processing method of a digital receiving system, comprising: receiving a broadcast signal in which known data symbol sequences being training sequences, main data being video and audio data for a first service and enhanced data being video and audio data for a second service are interleaved, wherein the digital broadcast signal includes data groups, wherein at least one of the data groups includes first, second and third regions, wherein the second region is located between the first and third regions, wherein the second region includes the enhanced data and the known data symbol sequences, and wherein the first and third regions include the enhanced data and the main data, wherein at least two of the known data symbol sequences are regularly spaced in the second region and at least one known data symbol sequence has a repeated pattern; detecting a timing error of the received broadcast signal; creating a timing clock based on the detected timing error, and re-sampling the received broadcast signal based on the timing clock; performing channel equalization on the received broadcast signal using at least one of the known data symbol sequences in the received broadcast signal; building a two-dimensional Reed-Solomon (RS) frame using the enhanced data in the equalized broadcast signal, the two-dimensional RS frame including cyclic redundancy check (CRC) error flags in each row of the RS frame and RS parity bytes in each column of the RS frame; checking the CRC error flags corresponding to each row of the two-dimensional RS frame; and performing RS erasure decoding for the two-dimensional RS frame column by column using the checked CRC error flags.