Appeal No. 2002-1510 Application No. 08/882,625 Page 7 eq.36, where t is one of I1, I2, P1, P2, and B. As a consequence DI1/DP1=XI1/Xp1, XI1 and Xp1 are the numbers of the generated bits for the previous frame of the type I1 (intra-frame coding) and P1 (inter-frame coding), respectively. The target-bit rate in a GOP is thus allocated according to the ratio recited in Claim 1.). From our review of Pecot and Lee, we agree with the examiner that Lee discloses allocating a target bit rate to picture data of a current group of pictures (GOP). However, we find from the disclosure of Lee (col. 35, lines 12-39) that: Within a GOP, the target bit allocation for each picture type is also allowed to vary to be adaptive to the changing scene complexity of the actual video sequence. The number of bits generated for the previous picture having the same picture type is used as the target bit allication. When the number of bits produced for one frame deviates from the target number of bits, the bit allocation for the next picture is adjusted to maintain an acceptable range of bit rate according to the equation: where t is a picture type, with t , {I1, I2, P1, P2, B}, Dt, is target bit allocation for picture type t, Xt, is the number of generated bits for the previous frame of the type t, EGOP is the expected GOP bit rate computed by the most recent data of bits generated for each frame type, and GGOP is the target GOP bit rate TGOPPage: Previous 1 2 3 4 5 6 7 8 9 10 11 12 NextLast modified: November 3, 2007