Patent ID: 6778609
Filing Date: 2004-08-17
Classification: G06T,H04N

Abstract:
An MPEG image decoding apparatus comprising:a buffer for receiving a bit stream which has been compressed based on the MPEG format, and temporarily storing data of the bit stream and outputting the stored data in input order; a register for receiving the data output from the buffer and storing the data in an empty area of the register in turn; a first data-search section for: searching the data stored in the register so as to detect the position of a specific code by executing a byte-unit data collating operation in which the collated position in the data is shifted by an integer multiple of a byte; and outputting a search result; a second data-search section for: searching the data stored in the register so as to detect the position of a specific code by executing a bit-unit data collating operation in which the collated position in the data is shifted by an integer multiple of a bit; and outputting a search result; a search operation control section for choosing one of an output from the first data-search section and an output from the second data-search section; a shifter for extracting a retrieved data from among the data stored in the register based on the output chosen by the search operation control section, and shifting the remaining non-retrieved data towards the head of the register and making an empty area after the non-retrieved data in the register; and a decoding section for decoding the retrieved data extracted by the shifter.