Method and apparatus for incremental code signing

Details Method and apparatus for incremental code signing Method and apparatus for incremental code signing

H - Electricity

04

N

H04N 7/24 (2011.01) H04N 7/26 (2006.01) H04N 7/32 (2006.01) H04N 7/42 (2006.01)

Patent

CA 2629246

A method and apparatus for variable accuracy inter-picture timing specification for digital video encoding is disclosed. Specifically, the present invention discloses a system that allows the relative timing of nearby video pictures to be encoded in a very efficient manner. In one embodiment, the display time difference between a current video picture and a nearby video picture is determined. The display time difference is then encoded into a digital representation of the video picture. In a preferred embodiment, the nearby video picture is the most recently transmitted stored picture. For coding efficiency, the display time difference may be encoded using a variable length coding system or arithmetic coding. In an alternate embodiment, the display time difference is encoded as a power of two to reduce the number of bits transmitted.

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