Patent ID: 6148135
Filing Date: 2000-11-14
Classification: G11B,H04N

Abstract:
A video and audio reproducing device for synchronizing a decoded video output and a decoded audio output based on a video decoding start controlling signal and an audio decoding start controlling signal comprising:a video and audio separator for separating a video time stamp, an audio time stamp coded video data and coded audio data from coded video and audio data, a video buffer memory for storing the coded video data, an audio buffer memory for storing the coded audio data, a video and audio synchronization controller for generating video decoding start controlling signal and audio decoding start controlling signal to start decoding of the coded video data and the coded audio data base on the video and audio time stamps, a video decoder for decoding the coded video data, and an audio decoder for decoding the coded audio data;wherein said video and audio synchronization controller sets a system clock reference (SCR) included in the frame header portion of the coded video and audio data into a system time counter to set a timing of a system time clock (STC) immediately after the video and audio reproducing device has been powered on, decodes and displays a first arriving video data synchronous with a display system frame pulse, which is the closest to the value of a video time stamp included in a frame header of the first video frame on the time axis of the set STC, sets again the value of the time stamp included in the first video frame to the system time counter to update the STC, outputs the video data for the second and subsequent video frames and all the audio data synchronously with the updated STC by outputting the video and audio data when the time indicated by the video and audio time stamps arrives on the time axis of the updated STC.