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參數(shù)資料
| 型號： | 935262451518 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 顏色信號轉(zhuǎn)換 |
| 英文描述： | COLOR SIGNAL DECODER, PQFP100 |
| 封裝： | 14 X 14 X 1.40 MM, PLASTIC, SOT-407, LQFP-100 |
| 文件頁數(shù)： | 48/144頁 |
| 文件大小： | 592K |
| 代理商： | 935262451518 |
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SAA7114H
SAA7114H; PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC comb filter, VBI
high performance scaler
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
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.
The target application for SAA7114H is to capture and scale video images, to be provided as digital video
stream through the image port of a VGA controller, for display via VGA’s frame buffer, or for capture to
system memory.
In parallel SAA7114H incorporates also provisions for capturing the serially coded data in the vertical blanking
interval (VBI-data). Two principal functions are available:
1. To capture raw video samples, after interpolation to the required output data rate, via the scaler
2. A versatile data slicer (data recovery) unit.
SAA7114H incorporates also a field locked audio clock generation. This function ensures that there is always
the same number of audio samples associated with a field, or a set of fields. This prevents the loss of
synchronization between video and audio, during capture or playback.
The circuit is IC-bus controlled (full write/read capability for all programming registers, bit rate up to 400
kbits/s).
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