Appeal No. 1999-2051
Application No. 08/716,615
BACKGROUND
The invention is directed to a moving picture coding system. Representative claim
1 is reproduced below.
1. A moving picture coding system which includes a quantizer for quantization
processing, comprising:
generated bit amount calculation means for calculating a generated bit
amount for each coded frame;
quantization variation value calculation means for calculating a quantization
variation value, which is a variation of a quantization step size from a previous
frame to a current frame, in accordance with a difference in the generated bit
amount between two most recently coded frames;
variation value correction frame determination means for determining a
frame as a frame for which correction of the quantization variation value should be
performed when the frame involves a large amount of motion and the quantization
variation value is positive in sign or when the frame involves a small amount of
motion and the quantization variation value is negative in sign;
variation value correction means for correcting, for said frame determined as
the frame for which correction should be performed, the quantization variation value
calculated by said quantization variation value calculation means so as to increase
an absolute value of the quantization variation value; and
quantization determination means for adding the quantization variation value
corrected by said variation value correction means to a quantization step size of the
previous frame to calculate a new quantization step size for the current frame.
The examiner relies on the following reference:
Gonzales et al. (Gonzales) 5,231,484 Jul. 27, 1993
Claims 1-7 stand rejected under 35 U.S.C. § 102 as being anticipated by
Gonzales.
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