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