VIA VT1623/VT1623M Digital TV Encoder - Bringing PC-level resolution and quality images to your TV screen

The VIA VT1623 digital TV encoder enables the display of digital information on analog television sets as well as the new generation of standard digital televisions (SDTV). Providing a high quality, flicker-free viewing experience across the key global video standards NTSC and PAL, the VIA VT1623 is a second generation video encoder designed for TV output of non-interlaced graphics data.

Comprising a colour space converter, the VIA ProScale™ multi-resolution scaler, a de-flicker filter, digital video encoder and digital-audio converter, the VIA VT1623 receives signal data input in either RGB or YCrCb format and generates video data as composite, S-video, component interlaced and progressive scan output, enabling the use of digital television sets.

The VIA VT1623 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 320x200 to 1024x768. An adaptive deflicker filter examines the graphics on a pixel-by-pixel basis to maintain a flicker-free display. The VIA VT1623 can further output video with a Macrovision 7.1 anticopy video signal or the Macrovision 1.0 AGC copy protection with 525p progressive scan output to deter unauthorized copying. Available in a low-power 64-pin TQFP package, all the features of the VIA VT1623 are software programmable through a serial bus interface that can provide read/write access to all device registers.

Features of VIA VT1623

Input Format
» Supports digital RGB (15/16 or 24-bit) or YCrCb (CCIR601 or CCIR656) 16 bit 4:2:2 input video data in both interlaced and non-interlaced formats

Output Format
» S-Video, Composite, YCbCr and SCART (RGB) with interlaced or non-interlaced scan output support NTSC (M and J) or PAL(B,D,G,H,I,M,N and Nc) TV output standards
» SDTV output mode (525p or 625p) compliant with EIA770-1 and EIA770-2

High Quality 4x10-Bit Video DAC
» Simultaneous two S-Video or one S-Video with two composite outputs
» Simultaneous RGB or YCbCr component output with one composite output
S-Video, Composite, YCbCr and SCART (RGB) with interlaced or non-interlaced scan output support

Macrovision (VT1623M)
» Supports Macrovision 7.1 anti-copy protection
» Supports Macrovision 1.0 AGC copy protection with 525p progressive scan output

Other Features
» Serial bus programming interface
» Graphics resolution up to 1024x768
» Second edition ProScaleTM engine for support of any underscan or overscan size
» Programmable power management
» Master or slave video timing operation
» P:P2 clocking mode for full TV screen
» Adaptive deflicker filtering to enhance TV image quality
» Automatic detection of TV presence

Note: The VIA VT1623M comprises the same specifications as those listed
above for the VT1623, with the addition that the VT1623M supports
Macrovision.