MSM7662 Просмотр технического описания (PDF) - Oki Electric Industry

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производитель

MSM7662

NTSC/PAL Digital Video Decoder

Oki Electric Industry 

¡ Semiconductor

PEDL7662-02

MSM7662

Input Signal Level

The figure below shows the recommended range of the input signal, received in an 8-bit straight

binary format.

255

reserved

246

200

Iuminance

chrominance

+DC

NTSC:60

(PAL:63)

4

0

input black level

sync

13

input sync-tip level

CVBS[7:0] input range

The above input conditions are ideal. Because analog signals are normally input at different

levels, the exact settings described above are difficult to achieve. While maintaining the ratio of

White Peak (100%)/SYNC = 100IRE/40IRE (NTSC), if the input signal is set within the A/D

converter's voltage range/the Y digital output will be output by digital AGC operation with the

pedestal position set at the black level (16) and the white peak position (100%) set at the peak level

(235) even if the peak level does not reach 196 (200 – 4).

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