Video decoding device for decoding video data in synchronism with a system clock

摘要

In a video decoding device, a system decoding section (13) analyzes header information included in multiplex data and performs various operations, including the separation of data, on the basis of the header information. An STC (System Time Clock) counting section (14) generates, based on an SCR (System Clock Reference)/PCR (Program Clock Reference) which is time reference data included in the multiplex data, a system clock SCK synchronous to the system clock of a coding device. A video decoding section (16) decodes video data included in the multiplex data in response to the system clock (SCK). Also, the video decoding section (16) generates a clock for video display synchronous to the system clock (SCK) and outputs the decoded video data in response to the clock for video display. The decoding device may additionally include an audio decoding section (15) for decoding audio data included in the multiplex data in response to the system clock (SCK), generating a clock for audio output and synchronous to the system clock (SCK), and outputting the decoded audio data in response to the clock for audio output. The decoding device obviates frame slipping and other errors even when the clock of an input system, i.e., the coding side and the clocks for representation at the decoding side are different in frequency from each other.