Patent ID: 6961382
Filing Date: 2005-11-01
Classification: H04N

Abstract:
1. A moving picture experts group (MPEG) decoder for producing a caption for display on a screen, said MPEG decoder producing a video stream from an externally-applied MPEG stream, the MPEG decoder comprising: a video decoder for decoding the video stream and extracting user data from header information of the video stream, the user data indicating whether the video stream includes caption data; a header memory for storing the user data; a central processing unit (CPU) for (i) decoding the user data, (ii) determining from the user data whether the video stream includes caption data, (iii) transforming the caption data into on-screen-display (OSD) object data, and (iv) generating an OSD Enable signal if the video stream contains caption data; an OSD controller for receiving the OSD Enable signal and transforming the OSD object data into pixel data in response to the enable signal and outputting the pixel data as pixel data output; wherein the OSD controller comprises: a video mixer for mixing the pixel data output with the decoded video data.