Introduction

The AL700C-EVB-A2 product contains an evaluation board that demonstrates the capabilities of the AL700 chipset, which is a 4-channel QUAD-screen video controller. The AL700 accepts digital video input sources, provides 2 analog output ports and 2 digital output ports. Direct Memory Access mode allows images to be uploaded onto a PC. The AL700 supports 4-channel 8-bit ITU-R-656 4:2:2 interface inputs; dual 8/16-bit digital outputs for successive processing; 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, a fully programmable register set allows flexible control of the video window overlay, OSD display, input channel select or output source select.

The OSD (On Screen Display) provides overlay of various graphics images such as Pop-up menu, logo bitmap or message text, etc. Other functions provided by the AL700 are PIP (Picture In Picture), 2X zoom with vertical and horizontal interpolation, anti-rolling and motion detection; these functions 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, anti-aliased display.

The AL700 provides a cost-effective solution for all security related applications.

Applications for the AL700

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

Key Features

• 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)
• VCR outputs only quad mode while Monitor can output quad, full screen, PIP and zoom.
• 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 OSD overlay
• Supports various types of video decoder and 1Mx16 or 4Mx16 SDRAM
• Supports registers programming via I2C serial or proprietary parallel interface
• Supports uploading image data onto PC
• Provides horizontal image mirroring