Appeal No. 1997-0410
Application No. 08/041,446
1. A method for operating a video compression system comprising at least one
encoder providing data to an encoder buffer and a decoder taking data from a decoder
buffer, comprising the steps of:
(a) changing the rate at which the encoder provides data to the encoder buffer from
a first rate R to a second rate R'; and
(b) maintaining an encoder buffer occupancy b (t) such that: (1) prior to time T -T ,e o d
max{0, Rt - B }# b (t) # min{B , RT }; and (2) after time T , max{0, R'T - B }# b (t) #d d e e d o d d e
min{B , R' T }; and (3) during the time T -T < t < T , max{0 , RT - Rt + R't + R'T -e d o d o o d
R' T - B }# b (t) # min{B , RT - Rt + R't + R'T - R'T }; wherein t represents time, To d e e o d 0 0
represents the time at which the data rate changes from R to R', B represents the
d
maximum capacity of the decoder buffer, B represents the maximum capacity of the
e
encoder buffer, and T represents the delay caused by the encoder and decoder buffers.
d
The prior art references of record relied upon by the examiner in rejecting the
appealed claims are:
Paik et al. (Paik) 5,216,503 Jun. 01, 1993
(Filed Dec. 24, 1991)
Lucas 5,235,418 Aug. 10, 1993
(Filed Nov. 19, 1991)
Ansari et al. (Ansari) 5,253,059 Oct. 12, 1993
(Filed May 15, 1992)
Claims 1, 3, 5, 8 and 10 stand rejected under 35 U.S.C. § 103 as being
unpatentable over Ansari. Claims 2, 4, 6, 7, 9, 11 and 12 stand rejected under 35 U.S.C. §
103 as being unpatentable over Ansari in view of Paik and Lucas.
Rather than reiterate the conflicting viewpoints advanced by the examiner and the
appellant regarding the above-noted rejections, we make reference to the examiner's
answer (Paper No. 17, mailed Jul. 23, 1996) for the examiner's reasoning in support of the
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