| 摘要 |
PURPOSE: A PCR(Program Clock Reference) jitter removing method and a device thereof are provided to correct a PCR delay value of a TS stream generated in the procedure of multiplexing by adding a time stamp per input packet of respective packets, thereby removing the PCR jitter. CONSTITUTION: A PCR jitter removing device includes a packet expanding unit(12) for recording a packet input time with respect to a multiplexer in the packet, extending the packet, and outputting the extension packet to a multiplexer buffer, and a PCR corrector for obtaining a buffer delay time via an entire delay time of an initial extension packet when calculating the entire delay time in the packet multiplexer by extracting the packet input time from the extension packet output via the multiplexer buffer, and compensating the multiplexing delay of the PCR packet by using the entire delay time of the PCR packet and the buffer delay time by extracting the PCR packet in the extension packet. The packet extension unit includes FIFO(41) storing the input packet, a clock generator(60) for generating system time clocks, STC counter(42) for counting the system time clocks and providing the system time clock to a PCR corrector, and a packet extension element(43) for outputting the extension packet by receiving the packet from the FIFO and a system time clock counting value from the STC counter and adding the input time to the packet. |
