Panasonic PT-53TWD63, Техническое руководство

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Sub Picture Signal Process
(See Figure 35) On the DG- Board, an analog to digital (A/D) converter circuit,
in the PIP mode. In this mode, the
mbined into one set of Y, Pb, and Pr
omponent signals.
The line doubler, located inside the IC, halves the horizontal line period, doubling
the horizontal frequency to 31.468KHz. Using IC4015 as a temporary storage
area, IC4002 then converts the digital signal scan format from interlaced to
progressive and sends the 10 bit signal to IC4501. The remaining process is the
same as NTSC and 480i.
located inside the Sub Global Core IC4002, converts the sub picture video
signals to digital.
The data is then applied to a comb filter where luminance and chrominance are
separated.
IC4502 processes the Sub video data for use
main and sub video components are co
c
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