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Description

The TMC2081 is a Digital Video Mixer that performs M = ( α ) V1 + ( 1-α ) V2 (for 0 ≤ α ≤ 1) cross-fading at speeds faster than 40 Mpps proportionally controlled by a 9-bit a-channel input. Variable rate dissolves and fades may be implementedwith unity gain at the a endpoints. With the a-Look-Up Table (aLUT), mixing may be controlled by a single bit of the a-channel input. Setup is via a microprocessor interface.

Features

? Mixes 24//16-bit GBR/YCBCR444//YCBCR422 and 8-bit color-index sources

? 24//16-bit GBR/YCBCR444//YCBCR422 output

? 255-step proportional mixing via α7-0 inputs

? 256-step mixing with a8-0 for α=100h unity gain

? 256 x 8-bit look-up table on α channel

? Lap-dissolve and fade effects

? α and crosspoint controls for soft and color-border wipe generation

? Mask register and three 256 x 8 bypassable CLUTs with overlay on A-channel

? Analog preview output with sync on Green/Y

? D/A power-down modes

? Single +5 volt power supply operation

? Pin compatible with TMC22080 Digital Mixer

Applications

? Mixing computer graphics and live video

? Lap-dissolve between video sources

? Fade to black or to user-selectable fill color

? Window/wipe processing