Patent ID: 7656947
Filing Date: 2010-02-02
Classification: H04J,H04N

Abstract:
1. A decoding device in a digital broadcast receiver, the device comprising: a demultiplexer unit for demultiplexing received packet data into video data and audio data, and extracting decoding control signals of respective audio and video data; a synchronization controller unit for generating an Estimated Program Clock Reference (EPCR) from the decoding control signal of the audio data, and comparing the EPCR with the decoding control signal of the video data to generate a video decoding control signal; a video decoder unit for decoding the demultiplexed video data in synchronous with the video decoding control signal, and then outputting the decoded video data; an audio decoder unit for decoding the demultiplexed audio data in synchronous with the audio decoding control signal, and then outputting the decoded audio data; and a display unit for displaying the decoded video data, wherein the synchronization controller unit comprises a Program Clock Reference (PCR) generator for updating a value of the audio decoding control signal inputted into a value of the EPCR and a comparator for comparing the video decoding control signal inputted with the EPCR to output the video decoding control signal at a point of time when the EPCR comprises a value greater than the value of the video decoding control signal, and wherein the comparator of the synchronization controller unit inputs a video DTS (VDTS) and a video PTS (VPTS) as the video decoding control signal, generates a video decoding start control signal at a point of time when the EPCR value becomes greater than the VDTS value, and generates a video decoding outputting control signal at a point of time when the EPCR value becomes greater than the VPTS value.