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 market. Multiple TVP5158 devices can be cascade connected to support up to 8-Ch Video or 16-Ch audio processing.

Noise reduction and auto contrast functions improve the video quality under low light condition which is very critical for surveillance products.

The TVP5158, TVP5157, and TVP5156 can be programmed by using a single I2C serial interface. I2C commands can be sent to one or more decoder cores simultaneously, reducing the amount of I2C activity necessary to configure each core. This is especially useful for fast downloading modified firmware to the decoder cores.

TVP5158, TVP5157, and TVP5156 use 1.1-V, 1.8-V, and 3.3-V power supplies for the analog/digital core and I/O. These devices are available in a 128-pin TQFP package.

TVP5158主要特性:


TVP5158应用:

• Security/surveillance digital video recorders/servers and PCI products

• Automotive infotainment video hub

• Large format video wall displays

• Game systems

图1.TVP5158功能框图

图2.TVP5158视频输入连接图

图3.TVP5158音频输入连接图

评估模块TVP5158EVM

The TVP5158EVM evaluation module is used to demonstrate the TVP5158. The TVP5158 is a Four-Channel NTSC/PAL Video Decoder with Independent Scalers, Noise Reduction, Auto Contrast, and Flexible Output Formatter for Security and other Multi-Channel Video Applications.

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 integrates 4-Ch audio ADCs to reduce the BOM cost for surveillance market. Multiple TVP5158 devices can be cascade connected to support up to 8-Ch Video or 16-Ch audio processing.

评估模块TVP5158EVM指标:

The TVP5158EVM was designed for ease of use to minimize set up time while providing an evaluation system for the TVP5158 video decoder.

The TVP5158EVM includes the TVP5158 NTSC/PAL Video Decoder Board Module, a universal 5V power supply and a video data cable that connects to a DM6467 EVM.

It also includes a Windows™ compatible application called WinVCC (Windows Video Control Center). WinVCC communicates with the TVP5158EVM via I2C through a USB port connection and provides the means for manipulating system register settings. This software is provided with the TVP5158EVM.

图4.评估模块TVP5158EVM外形图

评估模块TVP5158EVM主要特性:

Supports Four CVBS inputs and Four Audio inputs

Supports ITU-R BT.656 digital outputs or 16-bit 4:2:2 YCbCr with embedded synchronization for multi-channel evaluations (requires a DM6467EVM - not provided)Provides re-encoded single channel video outputs via a video encoder for image quality evaluation

Easy to use EVM system

Easy to use Windows based software

Provides default register configuration for easy setup

Supports user-customizable register configurations to support development efforts

Support Software

TVP5158 EVM Software Version 6.10(zip 9 MB)

图5.评估模块TVP5158EVM外形图方框图

图6.评估模块TVP5158EVM系统级框图

图7.评估模块TVP5158EVM电路图(1)

图8.评估模块TVP5158EVM电路图(2)

图9.评估模块TVP5158EVM电路图(3)

图10.评估模块TVP5158EVM电路图(4)

图11.评估模块TVP5158EVM电路图(5)

图12.评估模块TVP5158EVM电路图(6)

图13.评估模块TVP5158EVM电路图(7)

图14.评估模块TVP5158EVM电路图(8)
详情请见:
http://www.ti.com/lit/ds/sles243f/sles243f.pdf
和
http://www.ti.com/lit/ug/sleu108/sleu108.pdf