Appeal No. 96-2696
Application 08/167,415
24, line 22 to p. 25, line 9). Appellant's transmitting data
control circuit 8, which generates the invalid codes of Figure
9, is shown in Figure 8 and includes a invalid code generating
circuit 23 for generating the adjusting data and a staffing
start code generating circuit 24 for generating the staffing
start code (Spec. at 27, lines 16-21). The Figure 8 circuitry
is similar to its prior art counterpart (Figure 5) in that it
adds invalid codes to the output of send buffer 7 of Fig. 7(C)
when an overflow condition is detected in the send buffer:
"[I]f the data of a macroblock is likely to generate underflow
corresponding to the information sent from the send buffer 7,
the multiplexer 22 is controlled and the invalid code (of
broad meaning) is outputted to the transmission path" (Spec.
at 29, line 23 to p. 30, line 3).
Figures 11(A) and (B) show appellants' decoding
apparatus. In contrast to the prior art decoding apparatus
shown in Figures 6(A) and (B), appellant's decoding apparatus
includes an invalid code eliminating circuit 31 for
eliminating invalid codes before they reach the receiving
buffer 32 (Spec. at 30, lines 4-16). The details of invalid
code eliminating circuit 31 are shown in Figure 12 (Spec. at
- 8 -
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