Appeal No. 2003-2031
Application 09/225,193
We find that Lee teaches a bit rate control algorithm in
column 21, lines 23 through 51. Lee teaches that N is the number
of P1 frames. See Lee column 21, lines 26 and 27. Lee teaches
that to adapt N subject to a fixed bit rate constraint, a
variable bit allocation is used. See column 21, lines 28 through
31. Thus, in Lee, the rate control for a single video stream
within the system maintains a constant bit rate which is achieved
by using a variable bit allocation. However, we fail to find
that Lee teaches or suggests adapting encoding by adjusting the
encode bit rate for at least one stream of the multiple streams
only upon the beginning of a new group of frames within at least
one stream, wherein for the at least one stream of video frames
the encode bit rate is constant within the new group of frames
and is variable between new groups of frames.
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