Appeal No. 2002-1510
Application No. 08/882,625 Page 9
disclosed by Lee (col. 35, lines 37-39) is that “Xt is either the
generated bits for the previous frame of the type t or the
initial bit allocation for picture type t when the picture is at
the beginning of a GOP.”
We find (col. 35, lines 7-11) that the Xt values that exist
at the beginning of a GOP are not related to a prior GOP, but
rather that when the picture is at the beginning of a GOP, an
initial bit allocation for the picture type is updated at the
beginning of each GOP using equation 30 (col. 21, lines 45-51)
where “the following formula for target bit allocation results:
This bit allocation is updated by use of equation (30) at the
beginning of each GOP.” Lee further discloses (col. 21,
lines 32-39) that “[t]o describe the algorithm, let the channel
bit rate (bits/sec) be denoted by R, GOP size by M, expected GOP
bit rate by G, and target bit allocation for picture Type t by
Dt. The bit allocations for I1, I2, P1, P2, and B1 frames:
DI1=CI1x, DI2x, DP1=Cp1x, DP2=CP2=CP2x, DB1=CB1=CB1x, respectively, where
x is a common factor and CI1, CI2, CP1, CP2, and CB1 are constants
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