Customizable Video Input controller

CVI is a fully Customizable Video Input controller IP core. The video input controller can be applied to e.g. FPGA systems with a resource optimized, application specific feature configuration or to ASIC projects applying a more generic feature set and thus more flexibility.

The main functionality of CVI is reading an ITU-656 video input stream typically coming from a physical video input interface, e.g. a LVDS PHY or a video ADC, and writing the video data in RGB format to memory via DMA. Several on-the-fly operations on the video data can be applied such as clipping, scaling, color conversion, gamma correction, dithering and de-interlacing.

On the input side CVI can accept RGB as well as YC_BC_R color formats, in the latter case applying the on-the-fly conversion YC_BC_R to RGB.

CVI Customizability

Based on a highly modular architecture the CVI offers a wide range of features. The target set of features is configurable at synthesis time, allowing an optimal tailored solution for the target application: not needed features and the related modules are not synthesized, resulting in less resource usage (FPGA logic elements or ASIC gates) and power consumption.

The selected (configured) features can be controlled at run-time via software-programmable registers. To ease the application programmers’ life an ANSI-C software driver is delivered providing a set of comfort functions.

• Configurable Input Formats
• Configurable Output Formats
• Configurable Codeword Correction
• Configurable Chroma-Upsampling to YCBCR444
• Configurable Clipping Area
• Configurable Color Adjustment
• Configurable Colorspace Conversion: precise conversion between YCBCR and RGB
• Configurable Gamma Correction
• Configurable Scaling
• Configurable Deinterlacing
• Configurable Dithering
• Configurable Counter
• Frame Detection
• Configurable Shadowing (shadow registers)

• The main functionality of CVI is reading an ITU-656 video input stream typically coming from a physical video input interface, e.g. a LVDS PHY or a video ADC, and writing the video data in RGB format to memory via DMA. Several on-the-fly operations on the video data can be applied such as clipping, scaling, color conversion, gamma correction, dithering and de-interlacing.
• On the input side CVI can accept RGB as well as YCbCr color formats, in the latter case applying the on-the-fly conversion YCbCr to RGB.