| 摘要 |
PROBLEM TO BE SOLVED: To detect a start code at a high speed from a bit stream including compressed image data. SOLUTION: Data set in an output buffer 14 of a data alignment unit are divided into plural blocks h7-h0 by 4-bit each and whether or not each block is 0 is discriminated to decide the amount of shift. For example, when the data are stored in the buffer 14, since a start code standardized by the MPEG appears next in the output buffer 14 by shifting 7-bit each by a single operation, number of times of processing required to detect the start code is reduced and the detection speed is improved. |
