Abstract: A transport stream demultiplexer which receives transport stream packets and outputs data included the packets, has functions of judging whether a received transport stream packet is a null packet, and, if the received transport stream packet is a null packet, prohibiting writing data included in the received transport stream packet thereinto.

Abstract: A speech coding apparatus includes a pulse position candidate table, inter-pulse distortion table, first and second reference address tables, first and second reference address table creation units, and search table creation unit. The pulse position candidate table stores the pulse position candidate of each pulse. The inter-pulse distortion table stores a distortion calculated every pulse interval. The first reference address table creation unit regards the pulse position of the inter-pulse distortion table as a relative distance from the start of the inter-pulse distortion table, calculates a distortion every pulse interval to obtain the absolute address of the inter-pulse distortion table, and stores it in the first reference address table. Table creation unit creates a second reference address table accordingly. A multipulse search table is created using these absolute addresses.

Abstract: The invention provides a segmented processing method of a transport stream of a digital television that allows increasing the speed of the processing in a section filter, which is filter processing for program information, that occupies 40% of the computational effort even during TS Demux processing. The invention provides a step in which a two part search is carried out on the upper words of the comparison object data of the transport stream of a digital television, a step in which it is determined whether or not matching data is present in the upper words, and a step that compares the lower word of the comparison object data in the case that there is matching data present in the upper words.