Patent ID: 6990150

Claim:
A method for extracting a predetermined number of Standard Definition frames from an MPEG-encoded High Definition video frame containing a predetermined number of Standard Definition frames, the method comprising: passing the MPEG-encoded High Definition video frame through a High Definition MPEG decoder to recover the High Definition decoded data; the decoded data comprising High Definition scan lines; each scan line comprising pixel data; alternately outputting scan lines from the MPEG decoder from the top and bottom of the High Definition frame; separating the pixel data in the High Definition scan lines into the predetermined number of frames of Standard Definition scan lines; writing the pixel data in the separated scan lines into a number of FIFOs corresponding to the predetermined number of encoded Standard Definition frames; generating Standard Definition timing signals for each Standard Definition frame; and, outputting the Standard Definition timing signals and the pixel data in each FIFO to a video encoder communicating with the respective FIFO.