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參數(shù)資料
| 型號： | 935273916557 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 顏色信號轉(zhuǎn)換 |
| 英文描述： | COLOR SIGNAL DECODER, PBGA156 |
| 封裝： | 15 X 15 MM, 1.15 MM HEIGHT, PLASTIC, MS-034, SOT-472-1, BGA-156 |
| 文件頁數(shù)： | 84/178頁 |
| 文件大小： | 988K |
| 代理商： | 935273916557 |
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SAA7118; Multistandard video decoder with adaptive comb filter and component video input
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Product description
SAA7118; Multistandard video decoder with adaptive comb filter and component video input + Stay informed
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General description
The SAA7118 is a video capture device for applications at the image port of VGA controllers.
Philips X-VIP is a new multistandard comb filter video decoder chip with additional component processing, providing high quality, optionally scaled, video.
The SAA7118 is a combination of a four-channel analog preprocessing circuit including source selection, anti-aliasing filter and ADC with succeeding decimation filters from 27 to
13.5 MHz data rate. Each preprocessing channel comes with an automatic clamp and gain control. The SAA7118 combines a Clock Generation Circuit (CGC), a digital multistandard
decoder containing two-dimensional chrominance/luminance separation by an adaptive comb filter and a high performance scaler, including variable horizontal and vertical up and
downscaling and a brightness, contrast and saturation control circuit.
It is a highly integrated circuit for desktop video and similar 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 SAA7118 accepts CVBS or S-video (Y/C) as analog inputs from TV or VCR sources, including
weak and distorted signals as well as baseband component signals Y-PB-PR or RGB. An expansion port (X port) for digital video (bidirectional half duplex, D1 compatible) is also
supported to connect to MPEG or a video phone codec. At the so called image port (I port) the SAA7118 supports 8 or 16-bit wide output data with auxiliary reference data for
interfacing to VGA controllers.
The target application for the SAA7118 is to capture and scale video images, to be provided as a digital video stream through the image port of a VGA controller, for capture to system
memory, or just to provide digital baseband video to any picture improvement processing.
The SAA7118 also provides a means 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.
The SAA7118 also incorporates 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.
All of the ADCs may be used to digitize a VSB signal for subsequent decoding; a dedicated output port and a selectable VSB clock input is provided.
The circuit is IC-bus controlled (full write/read capability for all programming registers, bit rate up to 400 kbit/s).
file:///C|/Documents%20and%20Settings/lakshmip/Local%20Settings/Temp/notesFEC990/SAA7118.htm (1 of 5) [2/9/2005 12:20:18 PM]
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