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| ADI ADV7403 HDTV视频解决方案 |
| 作者： 时间：2008-07-22 来源:eaw |
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ADI 公司的ADV7403 是高质量单片多格式视频译码器和图像数字化器，支持PAL, NTSC和SECAM标准分量或S-video转换成数字digital ITU-R BT.656 格式。它还支持 把RGB/YPrPb 视频信号译码成数字YCrCb 或RGB 象素输出流，支持525i, 625i, 525p, 625p, 720p, 1080i, 1250i 和其它许多HD和SMPTE 视频标准。ADV7403广泛应用LCD/DLP™ 背投HDTV，PDP HDTV，CRT HDTV，LCD/DLP前投HDTV，LCD TV (HDTV ready)，带PVR 的HDTV STB，以及硬盘视频录像机，多格式扫描转换器，DVD刻录机和AVR接收器。本文介绍了ADV7403的主要特性，方框图以及应用连接电路图。
The ADV7403 is a high quality, single chip, multiformat video decoder and graphics digitizer. This multiformat decoder supports the conversion of PAL, NTSC, and SECAM standards in the form of composite or S-video into a digital ITU-R BT.656 format. The ADV7403 also supports the decoding of a component RGB/YPrPb video signal into a digital YCrCb or RGB pixel output stream. The support for component video includes standards such as 525i, 625i, 525p, 625p, 720p, 1080i, 1250i, and many other HD and SMPTE standards. Graphic digitization is also supported by the ADV7403; it is capable of digitizing RGB graphics signals from VGA to SXGA rates and converting them into a digital RGB or YCrCb pixel output stream. SCART and overlay functionality are enabled by the ADV7403’s ability to simultaneously process CVBS and standard definition RGB signals. The mixing of these signals is controlled by the fast blank pin.
The ADV7403 contains two main processing sections. The first is the standard definition processor (SDP), which processes all PAL, NTSC, and SECAM signal types. The second is the component processor (CP), which processes YPrPb and RGB component formats, including RGB graphics. For more specific descriptions of the ADV7403 features, see the Detailed Functionality and Detailed Description sections.
主要特性：
Four Noise Shaped Video® 12-bit ADCs sampling up to 140 MHz (140 MHz speed grade only)
12 analog input channel mux
1. SCART fast blank support
Internal antialias filters
NTSC/PAL/SECAM color standards support
525p-/625p-component progressive scan support
720p-/1080i-component HDTV support
Digitizes RGB graphics up to 1280 × 1024 @ 75 Hz (SXGA) (140 MHz speed grade only)
24-bit digital input port supports data from DVI/HDMI Rx IC
Any-to-any, 3 × 3 color-space conversion matrix
Industrial temperature range (−40°C to +85°C)
12-bit 4:4:4/10-/8-bit 4:2:2 DDR pixel output interface
Programmable interrupt request output pin
VBI data slicer (including teletext)
应用：
LCD/DLP™ rear projection HDTVs
PDP HDTVs
CRT HDTVs
LCD/DLP front projectors
LCD TV (HDTV ready)
HDTV STBs with PVR
Hard-disk-based video recorders
Multiformat scan converters
DVD recorders with progressive scan input support
AVR receiver
图1. ADV7403方框图
图2. ADV7403应用连接电路图
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