RATE ADAPTATION SCHEME OF ATSC-M/H MULTIPLEXER

摘要

PURPOSE: A rate adaptation apparatus for digital broadcasting service is provided to release a constant transfer rate under the condition of a packet of terrestrial broadcasting DTV with uncertain transfer rate, by synchronizing the packet of terrestrial broadcasting DTV by a clock of a multiplexer. CONSTITUTION: A clock generator(302) forms a standard clock by using an oscillator. An FIFO(First-In First-Out)(308) generates a packet which is temporarily saved based on the standard clock. A packet providing unit provides the packet to the FIFO at a faster speed than the speed of the standard clock. If there is no packet storage space in the FIFO, a null packet sensing unit(300) detects the null packet in a packet in the packet providing unit. In a way which the detected panel is not provide to the FIFO, a switch(304) disconnects a delivery path. [Reference numerals] (300) Null packet sensing unit; (302) Clock generator; (310) Null packet generating unit; (312) Multiplexing unit; (AA) Input(MPEG-2 TS 19.39±α Mbps)