Patent ID: 6201815
Filing Date: 2001-03-13
Classification: H04N

Abstract:
A transport packet stream separating apparatus comprising:a storage unit for storing a data;a packet identification filter for extracting transport packets having a predetermined packet identification from a stream of transport packets, each of said extracted transport packets including at least one section;a section filter unit for determining whether a header portion of each of the extracted transport packets is coincident with a reference data, for outputting said at least one section of each of the extracted transport packets regardless of coincidence or discrepancy between said header portion of each of the extracted transport packets and said reference data, and for generating a reset signal when it is determined that said header portion of each of the extracted transport packets is not coincident with said reference data; andan interface unit for receiving the at least one section from said section filter unit, for storing the received section in said storage unit while updating a write address from a start address, and for resetting said write address to said start address in response to said reset signal,wherein when first and second halves of said header portion are respectively contained in one transport packet and a next transport packet of the extracted transport packets, said section filter unit determines the coincidence or the discrepancy between said header portion and said reference data by comparing said first half contained in said one transport packet and a corresponding portion of said reference data, and then by comparing said second half contained in said next transport packet and a remaining portion of said reference data without holding said first half.