Patent ID: 6326960
Filing Date: 2001-12-04
Classification: G09G,H04N

Abstract:
A decoder for a multimedia data stream, the multimedia stream including a video data stream with presentation time stamps embedded therein, comprising:a host processor interface for communication with a host processor;a video output processor connected to a buffer memory holding the video data of the video data stream, the video output processor including a counter which control timing in displaying of the video data; anda timer connected to the video output processor and the host processor interface, the timer (i) maintaining a local time, (ii) receiving time values from the host processor over the host processor interface, each time value corresponding to one of the presentation time stamps, and (iii) providing a video output phase control signal to reset the counter in the video output processor when the local time matches one of the time values received, so that output of display data is precisely aligned with a time stamp associated with the display data, wherein the time value corresponds to one of the presentation timestamps offset by an expected delay related to a processing time of a display system.