06683987 is referenced by 53 patents.

A method and apparatus for altering the picture updating frequency within an MPEG compressed video data stream replaces the data of each of successive predictively encoded pictures of that data stream, such as all of the B-picture or all of the B-pictures and all of the P-pictures, with copy data which have been stored beforehand in a memory and which designate all of the macroblocks of each such replaced picture as being skipped macroblocks with respect to a corresponding reference picture, thereby ensuring that each such replaced picture will be decoded as a copy of the corresponding reference picture by a MPEG decoder apparatus. Alteration of the picture updating frequency of the stream of pictures expressed by the MPEG data stream can thereby be achieved very simply, while in addition the overall amount of MPEG data can be substantially reduced.

Title
Method and apparatus for altering the picture updating frequency of a compressed video data stream
Application Number
9/521662
Publication Number
6683987 (B1)
Application Date
March 8, 2000
Publication Date
January 27, 2004
Inventor
Takayuki Sugahara
Yokosuka
US
Agent
Parkhurst & Wendel L
US
Assignee
Victor Company of Japan
US
IPC
G06K 9/36
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