TI公司的TVP5158, TVP5157和TVP5156是四路NTSC/PAL視頻譯碼器,具有單獨的定標器,降噪,自動對比度調整,以及靈活的輸出格式編制器.TVP5158提供和 DaVinci™處理器的音頻和視頻連接,視頻輸出端支持8位ITU-R BT.656 和16位4:2:2 YCbCr,模擬/數字核和I/O的電壓分別是不1.1V/1.8V和3.3V,主要用在數字視頻記錄儀/服務器和PCI產品,汽車娛樂視頻集線器,視頻墻顯示器和游戲系統.本文介紹了TVP5158,TVP5157和TVP5156主要特性與方框圖,TVP5158視頻和音頻輸入連接圖,以及評估模塊TVP5158EVM主要特性和方框圖,系統級框圖和電路圖.

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應用:

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

• Automotive infotainment video hub

• Large format video wall displays

• Game systems

圖1.TVP5158功能框圖

圖2.TVP5158視頻輸入連接圖

圖3.TVP5158音頻輸入連接圖

評估模塊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.

評估模塊TVP5158EVM指標:

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.

圖4.評估模塊TVP5158EVM外形圖

評估模塊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)

圖5.評估模塊TVP5158EVM外形圖方框圖

圖6.評估模塊TVP5158EVM系統級框圖

圖7.評估模塊TVP5158EVM電路圖(1)

圖8.評估模塊TVP5158EVM電路圖(2)

圖9.評估模塊TVP5158EVM電路圖(3)

圖10.評估模塊TVP5158EVM電路圖(4)

圖11.評估模塊TVP5158EVM電路圖(5)

圖12.評估模塊TVP5158EVM電路圖(6)

圖13.評估模塊TVP5158EVM電路圖(7)

圖14.評估模塊TVP5158EVM電路圖(8)
詳情請見:
http://www.ti.com/lit/ds/sles243f/sles243f.pdf
和
http://www.ti.com/lit/ug/sleu108/sleu108.pdf