Kortek corporation
49
of
99
PDP R&D Center
VIDEO PROCESSOR:
Since the HD mode like 1920*1080, 1280*720 have higher video bandwidth than the existing
video signals, the ordinary decoder like VPC3230 can
’
t handle those modes. PC has higher bandwidth of video
signal than TV and the RGB video format.
Therefore, if the HD signal can be converted into the RGB signals, the TV video signal can have the same
processing as the PC VIDEO signal. CXA2101 developed by SONY is used to convert YPbPr into RGB.
ANALOG SWITCH:
The video decoder like VPC3230 has a built-in video switch that assigns one signal out of
various received inputs, though most of ICs for PC are designed so that they support only one source because of
less necessity of simultaneously processing the multi inputs. To process the input source of MULTI(PC&HD),
therefore, a function of selecting an input should be externally added; as is performed by ROHM
’
s
BA7657F.PW364 transmits a signal determining which input is selected.
ADC:
A device that converts the input RGB signals into the 8bit DIGITAL RGB signals. ADC also converts
CONTRAST,BRIGHTNESS and COLOR TEMPERATURE.
PW364:
PW364 is a multi-functional scaler which one chip has video signal scaling, 8086 CPU, 4M BYTE VIDEO
MEMORY functions. The PC and Video input signals are received from GRAPHIC PORT and VIDEO PORT,
respectively. Its main functions include UP/DOWN SCALING, ZOOM, GAMMA CORRECTION, Compensation of
GEOMETRIC DISTORTION, powerful GRAPHIC OSD.
FIRMWARE:
Mounted is a software that is used for system control by operating 8086 built in PW364. A 4MBIT
FLASH ROM is mainly used, but one up to 8MBIT can be used according to PROGRAM and capacity of OSD DATA.
The system is easy to maintain because programming can be re-done at any time using the FLASH ROM.
S c a l e r
( P W 3 6 4 )
P A N E L
F I R M W A R E
DTV
Y/Pb/Pr
VIDEO
PROCESSOR
(CXA2101)
PC
(RGB)
ANALOG
SWITCH
(BA7657F)
ADC
(AD9884)
RGB Digital to
Graphic Port of
PW364
Содержание P42SV
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