資料介紹
The SAA7114H is a video capture device for applications
at the image port of VGA controllers.
The SAA7114H is a combination of a two-channel analog
preprocessing circuit including source selection,
anti-aliasing filter and ADC, an automatic clamp and gain
control, a Clock Generation Circuit (CGC), a digital
multi-standard decoder containing two-dimensional
chrominance/luminance separation by an adaptive comb
filter and a high performance scaler, including variable
horizontal and vertical up and down scaling and a
brightness, contrast and saturation control circuit.
It is a highly integrated circuit for desktop video
applications. The decoder is based on the principle of
line-locked clock decoding and is able to decode the colour
of PAL, SECAM and NTSC signals into ITU 601
compatible colour component values. The SAA7114H
accepts as analog inputs CVBS or S-video (Y/C) from
TV or VCR sources, including weak and distorted signals.
An expansion port (X-port) for digital video (bi-directional
half duplex, D1 compatible) is also supported to connect to
MPEG or video phone codec. At the so called image port
(I-port) the SAA7114H supports 8 or 16-bit wide output
data with auxiliary reference data for interfacing to VGA
controllers.
at the image port of VGA controllers.
The SAA7114H is a combination of a two-channel analog
preprocessing circuit including source selection,
anti-aliasing filter and ADC, an automatic clamp and gain
control, a Clock Generation Circuit (CGC), a digital
multi-standard decoder containing two-dimensional
chrominance/luminance separation by an adaptive comb
filter and a high performance scaler, including variable
horizontal and vertical up and down scaling and a
brightness, contrast and saturation control circuit.
It is a highly integrated circuit for desktop video
applications. The decoder is based on the principle of
line-locked clock decoding and is able to decode the colour
of PAL, SECAM and NTSC signals into ITU 601
compatible colour component values. The SAA7114H
accepts as analog inputs CVBS or S-video (Y/C) from
TV or VCR sources, including weak and distorted signals.
An expansion port (X-port) for digital video (bi-directional
half duplex, D1 compatible) is also supported to connect to
MPEG or video phone codec. At the so called image port
(I-port) the SAA7114H supports 8 or 16-bit wide output
data with auxiliary reference data for interfacing to VGA
controllers.
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