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AL240C-EVB-A1 - Adaptive Comb Filter Video Decoder EVB (EOL)



This AL240 Evaluation Kit is specially designed for evaluating the AL240 Adaptive Low Power Video Decoder. The Evaluation kit allows maximum flexibility for optimizing various input and output modes for specific applications. Using the hardware and software provided in the Evaluation Kit, Standalone and PC-Based mode can be demonstrated. The most recent version provides Binary Switch, Fast Channel Switch, Close Caption VBI detect and display.

AL240 Adaptive Low Power Video Decoder

The AL240 is a silicon efficient, cost effective high video quality NTSC/PAL
SECAM video decoder with high quality Y/C separation process. The AL240 decodes NTSC/PAL SECAM composite video or S-video and converts it into YUV 4:2:2, 8-bit ITU 656 digital video output. Employing adaptive filter technology, the AL240 is able to provide clear Y/C separated signals while maintaining excellent frequency response. The result is sharp, high detail video that eliminates unwanted dot crawl and false color effects. Fully programmable video characteristic control, such as hue, contrast, brightness, saturation, are supported. The AL240 decoder incorporates an advanced vertical blanking interval (VBI) data processor to do data slicing, parsing and decoding teltext, closed caption, and other formats. Two wires of fast channel switching input allow the decoder to do an instant alternation of analog CVBS input from one to the other. Up to 4 serial bus addresses can be selected via 2 configuration pins that allow multiple AL240 chips on the design without extra logic.




  • Decodes NTSC, PAL and SECAM composite video or S-video
  • Supports all variations of the NTSC standard – (M, 4.43)
  • Supports all variations of the PAL standard – (I, B, G, H, D, N, M, combination N)
  • 4 analog inputs with internal switches among four input - e.g. 4xCVBS, 2xS-Video or
    (2xCVBS & 1xS-Video)
  • Standard 8-bit ITU-R.BT656 along with separate sync signals, YCbCr 4:2:2 format output
  • Excellent quality Y/C separation – minimizes cross Luma and cross color effects
  • Adaptive Comb Filter for NTSC&PAL Y/C separation
  • BCS (Brightness/Contrast/Saturation and Hue) control
  • Supports VBI decoding
  • Decodes weak and noisy off-air signals
  • Hardware channel switching
  • Two-wire serial bus programming with up to 4 serial bus sub-addresses selectable

Applications for the AL240C chipset

  • Video surveillance applications
  • Mobile System
  • Handheld Applications
  • Video Capture devices
  • Video Phone
  • Networking Video, etc.


AL240C-EVB-A1 User Manual

AL240 chip information