Appeal No. 96-2696
Application 08/167,415
specification at page 27, lines 8-12 as "invalid code in the
broad meaning," consists of a staffing start code and
adjusting data (Spec. at 26, lines 1-3). The staffing start
code "is formed of a synchronous code and a staffing start
[sic, staffing] code" (Spec. at 26, lines 3-4). The
synchronous code is "a unique pattern and it is determined so
that any other pattern [the] same as the synchronous code is
never generated" (Spec. at 26, lines 8-11). The staffing code
includes information about the data included in the macroblock
(Spec. at 26, lines 11-15). The adjusting data consists of a
synchronizing code byte followed by the "required number" of
all-zero bytes representing invalid codes (in the narrow
sense) (Spec. at 26, line 16 to p. 27, line 7), i.e., the
number of invalid codes needed to avoid the above-described
underflow condition.
Figures 7(A) to 7(C), which show appellants' encoding
apparatus for inserting the invalid codes shown in Figure 9,
is the same as the prior art encoding apparatus shown in
Figures 1(A) to 1(C), except that appellants' transmitting
data control circuit 8 (Fig. 7(C)) differs from the prior art
transmitting data control circuit 111 of Figure 1(C) (Spec. at
- 7 -
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