GENERAL DESCRIPTION
The CMOS circuit SAA7196, digital video decoder, scaler and clock generator (DESCPro), is a highly integrated circuit for DeskTop Video applications. It combines the functions of a digital multistandard decoder (SAA7191B), a digital video scaler (SAA7186) and a clock generator (SAA7197).

FEATURES
• Digital 8-bit luminance input [video (Y) or CVBS]
• Digital 8-bit chrominance input [CVBS or C from CVBS, Y/C, S-Video (S-VHS or Hi8)]
• Luminance and chrominance signal processing for main standards PAL, NTSC and SECAM
• Horizontal and vertical sync detection for all standards
• User programmable luminance peaking for aperture correction
• Compatible with memory-based features (line-locked clock, square pixel)
• Cross colour reduction by chrominance comb-filtering for NTSC or special cross-colour cancellation for SECAM
• UV signal delay lines for PAL to correct chrominance phase errors
• Square-pixel format with 768/640 active samples per line
• The bidirectional expansion port (YUV-bus) supports data rates of 780 × fH (NTSC) and 944 × fH (PAL, SECAM) in 4 : 2 : 2 format
• Brightness, contrast, hue and saturation controls for scaled outputs
• Down-scaling of video windows with 1023 active samples per line and 1023 active lines per frame to randomly sized windows
• 2D data processing for improved signal quality of scaled luminance data, especially for compression applications
• Chroma key (α-generation)
• YUV to RGB conversation including anti-gamma ROM tables for RGB
• 16-word output FIFO (32-bit words)
• Output configurable for 32-, 24- and 16-bit video data bus
• Scaled 16-bit 4 : 2 : 2 YUV output
• Scaled 15-bit RGB (5-5-5+α) and 24-bit (8-8-8+α) output
• Scaled 8-bit monochrome output
• Line increment, field sequence (odd/even, interlace/non-interlaced) and vertical reset control for easy memory interfacing
• Output of discontinuous data bursts of scaled video data or continuous data output with corresponding qualifier signals
• Real-time status information
• I2C-bus control
• Only one crystal of 26.8 MHz required
• Clock generator on chip.