As the dynamic progression of computers and the Internet increasingly impacts on our lives, so connectivity and content delivery requirements grow more sophisticated. An increasing demand for the display of digital information and multimedia content on everyday television screens, reflected by the emerging market for set top boxes, is accelerating the rate of convergence between PC systems and traditional home and business appliances that has required the development of new technologies to bridge the digital-analog divide.
The VIA VT1621 TV encoder fulfills this function by enabling the display of digital information on analog television sets. Providing a high quality, flicker-free viewing experience across the key global video standards NTSC and PAL, the VIA VT1621 has a wide array of features to ensure the finest image quality.
Comprising a color space converter, the VIA ProScale™ multi-resolution scaler, a de-flicker filter, digital video encoder and digital-audio converter, the VIA VT1621 receives signal data input in either RGB or YCrCb format and generates video data as composite, S-video, and component interlaced formats.
The VIA VT1621 is equipped with the latest version of VIA’s ProScaleTM engine technology, providing the most advanced vertical and horizontal scaling technology supporting input resolutions from 320×200 to 800×600. An adaptive deflicker filter examines the graphics on a pixel-by-pixel basis to maintain a flicker-free display. The VIA VT1621 can further output video with a Macrovision 7.1 anticopy video signal to deter unauthorized copying. Available in a low-power 44-pin TQFP package, all the features of the VIA VT1621 are software programmable through a serial bus interface that can provide read/write access to all device registers.
Benefits of VIA VT1621
Supports wide range of I/O signals: Input types include RGB and YCrCB signals with output signals types including S-Video, and NTSC and PAL.
Feature-rich design: The VIA VT1621 includes an adaptive deflicker filter that examines the graphics on a pixel-by-pixel basis to maintain a flicker-free display, and has Macrovision support
VIA’s ProScaleTM engine technology: The most advanced vertical and horizontal scaling technology, supporting input resolutions from 320×200 to 800×600
Easy to Integrate: With a low power 44-pin TQFP package all features of the VT1621 are software programmable through a serial bus interface that can provide read/write access to all device registers.
Key Features of VIA VT1621
» Graphics resolution up to 800×600
» ProScaleTM engine for support of underscan or overscan sizes
» Deflicker filtering to enhance TV image quality
» Input formats supported
– Digital RGB (15/16 or 24-bit)
– YCrCb (CCIR601 or CCIR656)16 bit 4:2:2 input video data
» Wide range of Output Formats
– PAL(B,D,G,H,I,M,N and Nc)
– NTSC (M and J)
» High Quality 3×9-Bit Video DAC
» Supports Macrovision 7.1 anti-copy protection
» Advanced algorithm for text sharpness
» Serial bus programming interface
» Programmable power management
» Master or slave video timing operation
» Automatic detection of TV presence
» 44-pin TQFP package