| 摘要 |
<p>A method and an apparatus for processing video and audio data received in a decoding system are provided. The method includes the following steps. When a program clock reference (PCR) is unavailable in the system, a system time clock (STC) is recovered by using a presentation time stamp (PTS) of video or audio data, or a linear combination result of the PTS of the video data and the PTS of the audio data. The STC is compared with the PTSs of the currently captured and audio data, and a current data processing mode is determined. A difference between the PTS of the video data and the PTS of the audio data is monitored. An absolute value of the difference is compared with a set threshold value, and when the absolute value is greater than or equal to the threshold value, an asynchronous play mode is adopted as a system play mode; otherwise, a synchronous play mode is adopted as the system play mode. Through the method and apparatus, synchronization of video signals and audio signals can be achieved when the PCR is unavailable in the decoding system.</p> |
