Appeal No. 2004-0123
Application No. 09/118,922 Page 6
there is nothing in Daum to suggest that the techniques for
synchronizing audio data and video data are applicable to the
solution of the problem of simultaneously displaying picture and
sub-picture data at high speed, as in the present invention. It
is additionally argued that in Tsukagoshi, the subtitles to be
displayed in trick play mode are not the same subtitles that
would be displayed in normal mode, and that since the subtitles
are predetermined to be played back in fast play mode, there
would be no reason to skip any of the subtitles since they are
already predetermined before playback.
From our review of Fujita, we agree with the examiner that
Fujita discloses decoding of a searched picture, updating a
system clock reference (SCR) value with a presentation time stamp
(PTS); displaying the decoded picture; searching for a sub-
picture and comparing a command executing start time for a
current display control sequence (DCSQ) with the SCR value, and
waiting for the SCR to equal the command executing start time
when they are not equal. We further agree with the examiner that
Fujita does not disclose skipping the current DCSQ if the system
clock is greater than the command executing start time, nor does
Fujita disclose decoding video and sub-picture data at high
speed. Fujita further discloses that the sub-picture can be
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