AL700 Color Quad Image Controller

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See how the AL700 fits into your design

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The AL700 is a 4 channel QUAD-screen color video controller that can accept digital video input sources, provides 2 analog output ports, 2 digital output ports, and memory direct access mode allowing images to be uploaded onto a PC. The AL700 controller chip not only supports 4 channel 8-bit ITU-R-656 4:2:2 interface inputs, dual 8/16-bit digital outputs for successive process and dual analog (TV encoder embedded) video outputs for TV, Camcorder, VCR, etc. SDRAM memory is supported via a direct video frame buffer interface. Through I2C serial or proprietary parallel bus, fully programmable register set allows flexibility of control of video window overlay, OSD display, input channel select or output source select.

OSD (On Screen Display) windows provide overlay of various graphics images such as Pop-up menu, logo bitmap or message text, etc. Other functions provided by AL700, such as PIP (Picture In Picture), 2X zoom with vertical and horizontal interpolation, anti-rolling, video loss detection and motion detection, can increase the value and power of a security system design. Averlogic's proprietary digital and analog signal processing technologies create a high quality tear free, flicker free and anti-aliasing display. The AL700 provides a cost-effective solution for all applications of security related system.

Characteristics

• Accepts NTSC, PAL and SECAM video formats
• Supports 4 independent 656/601 8-bit video inputs
• Supports multiplexing function for 2 channels using one decoder
• Provides 2 independent 656/601 8/16-bit digital outputs
• Provides 2 independent S-video/Composite analog video outputs (no need external encoders)
• Picture location selectable
• Supports PIP (Picture-In-Picture) function
• Supports programmable picture overlay and layer priority
• Displays picture at arbitrary channels of 1,2,3 and 4
• Provides channel switching without rolling
• Freeze individual channel
• Provides video loss detection and motion detection
• 2X zoom with vertical and horizontal interpolation
• Provides embedded OSD (On Screen Display) and supports external OSD function
• Supports BMP image overlay and Non-fixed font display
• Provides fading effects for overlay
• Supports various types of video decoder
• Supports 1Mx16 or 4Mx16 SDRAM
• Supports registers programming via I2C serial or proprietary parallel interface
• Supports uploading image data onto PC
• Provides horizontal image mirroring
• Supports Underscan mode
• 3.3Volts, low power consumption
• Available in 208-pin 28*28mm PQFP

Applications

• Video Surveillance System
• Video Splitting Processor
• Car Rear Vision System

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Reference Board

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