Appeal No. 96-4011
Application No. 07/996,525
includes low-band component YL of the luminance signal Y
frequency interleaved with the mixed chrominance signal C and the
carrier high-band luminance signal YH . The chrominance signal C’
is an output from quadrature two-phase modulation circuit 5 that
receives as inputs the color difference signals I and Q. The
spectral arrangement of the encoded EDTV signal is shown in
Figure 4(A). Figure 7 of Ishikawa shows a system for receiving
the encoded signal transmitted from Figure 1, and for processing
it back into the original component signals (i.e., wide-band
luminance signal Y and color difference signals I and Q). The
Figure 7 processing circuitry includes filters 21, 23 and 32,
subtracters 22 and 24, and a multiplier 31. Figure 9 of Ishikawa
discloses a VTR that records and plays back the encoded EDTV
signal. Adder 47 outputs to magnetic recording/playback head 48
a frequency-modulated, low-band luminance signal (FM-YL) from
high-pass filter 39 that is combined with a low-band converted
carrier chrominance signal and a carrier high-band luminance
signal (FC - C & YH ) from low-pass filter 46. The frequency’
spectrum for these signals is illustrated in Figure 10(A).
Figure 12 of Ishikawa is a diagram of a camera-combined type VTR
that handles EDTV signals. The image sensing part 101 receives
luminance signal Y, and a modulated, line sequential color
5
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Last modified: November 3, 2007