The system and method extracts a predetermined number of Standard Definition television frames from an MPEG-encoded High Definition video frame. The MPEG-encoded High Definition frame is decoded to recover the High Definition scan lines. Scan lines are alternately output from the decoder from the top...http://www.google.com/patents/US20030215017?utm_source=gb-gplus-sharePatent US20030215017 - System and method for using a High-Definition MPEG decoder to extract multiple Standard Definition frames from a High-Definition frame
