Appeal No. 2002-0489
Application 08/831,731
BACKGROUND
The invention relates to a device having a programmable
horizontal sync pulse to simulate a burst gate signal. A burst
gate signal is a signal that envelops the color burst signal of a
composite video signal. The burst gate signal is provided to a
phase-locked-loop (PLL) device to set a window during which the
PLL device locks onto the 3.58 MHz frequency of the color burst.
The PLL device provides a continuous subcarrier reference
frequency output to a comb filter decoder which separates the
luminance (Y) and chrominance (C) components of a composite video
signal. Appellant states that prior art video decoder have used
internal burst gate signals (specification, p. 3). The decoder
of the present invention provides an external simulated burst
gate signal which allows for color separation circuitry external
to the video decoder (specification, p. 4).
Claim 1 is reproduced below.2
1. An appliance using a composite video signal having
a color burst, the composite video signal including a
2 The word "external" underlined in claim 1 was proposed to
be deleted by amendment after final rejection (attached to Paper
No. 21). The amendment was denied entry by an Advisory Action
(Paper No. 22), stating that this presented a new limitation
requiring further consideration. Nevertheless, since there is no
rejection based on the word "external," and since we consider the
word to be an obvious error which only makes the claim difficult
to address, we will consider claim 1 to be without the word
"external" and recommend that the examiner allow entry of the
amendment deleting the term.
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