TI TVP5158四路NTSC(PAL)视频译码解决方案

TI公司的TVP5158, TVP5157和TVP5156是四路NTSC/PAL视频译码器,具有单独的定标器,降噪,自动对比度调整,以及灵活的输出格式编制器.TVP5158提供和 DaVinci™处理器的音频和视频连接,视频输出端支持8位ITU-R BT.656 和16位4:2:2 YCbCr,模拟/数字核和I/O的电压分别是不1.1V/1.8V和3.3V,主要用在数字视频记录仪/服务器和PCI产品,汽车娱乐视频集线器,视频墙显示器和游戏系统.本文介绍了TVP5158,TVP5157和TVP5156主要特性与方框图,TVP5158视频和音频输入连接图,以及评估模块TVP5158EVM主要特性和方框图,系统级框图和电路图.
The TVP5158, TVP5157, and TVP5156 devices are 4-channel high-quality NTSC/PAL video decoders that digitize and decode all popular base-band analog video formats into digital video output. Each channel of this decoder includes 10-bit 27-MSPS A/D converter (ADC). Preceding each ADC in the device, the corresponding analog channel contains an analog circuit that clamps the input to a reference voltage and applies the gain.
Composite input signal is sampled at 2x the ITU-R BT.601 clock frequency, line-locked alignment, and is then decimated to the 1x pixel rate. CVBS decoding uses five-line adaptive comb filtering for both the luma and chroma data paths to reduce both cross-luma and cross-chroma artifacts. A chroma trap filter is also available. On CVBS inputs, the user can control video characteristics such as contrast, brightness, saturation, and hue via an I2C host port interface. Furthermore, luma peaking (sharpness) with programmable gain is included.
All 4 channels are independently controllable. These decoders share a single clock input for all channels and for all supported standards.
TVP5158 provides a glueless audio and video interface to TI DaVinci™ video processors. Video output ports support 8-bit ITU-R BT.656 and 16-bit 4:2:2 YCbCr with embedded synchronization. TVP5158 supports multiplexed pixel-interleaved and line-interleaved mode video outputs with metadata insertion.
TVP5158 and TVP5157 integrate 4-Ch audio ADCs to reduce the BOM cost for surveillance ma...