Using order value for processing a video picture
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United States of America Patent
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-
Nov 6, 2007
Grant Date -
Dec 2, 2004
app pub date -
Mar 2, 2004
filing date -
Jul 15, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
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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