Appeal No. 1999-0003 Page 2
Application No. 08/642,742
formats are used to represent images in computer-based image
processing systems. Often, all the various elements or nodes
of a network of interconnected computers operate in a
compatible video format such as the H.261 video standard.
Incompatible video formats, however, are sometimes used
in the same network. The appellants’ invention aims to
provide compatibility therebetween. For each high-level video
format, video data at the bitmap level may be encoded in its
particular high-level video encoding format. Similarly,
encoded video data may be decoded in the applicable video
format to provide bitmap video data for display. To convert
data encoded in one video format into data encoded in another
video format, the encoded video data are decoded to an
interim-level format between the encoded level and the bitmap
level and common to both video formats. For example, the
interim-level format may be subsampled YUV-formatted video
data. The interim-level video data are then encoded in the
second video format.
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