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About the Panasonic TU-HDS20 STB, Gary wrote:


"The 4:3 mode will allow 4:3 HDTV-ready sets that do not compress the raster (like RCA and the X81-series Toshiba) to display 16:9 material with gray bars above and below the image. Like all other STBs that do this, it actually turns 1080i into 810i, but still displays a 16:9 active image. There is no provision to view full 1080i lines from the top and bottom and cut off the sides of the image (as the RCA DTC-100 and the Toshiba and Mitsubishi STBs do)."


So, question: What would happen if in 4:3 mode (for the STB), you try displaying a 1080i HD signal on a 4:3 HDTV set that DOES compress the raster when it you set the TV to 1080i mode?

 

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You still have a 16:9 image with top/bottom black bars, however, the image is vertically squashed. My Samsung T150 and Sony 36XBR400 combo can do this. Of course, when the stb output 16:9 1080i, everything is just fine. Bottom line is, whenever it sees a 1080i signal, the TV will do raster compression. Remember the signal is analog, the TV has no way of knowing if it is 16:9 or 12:9(4:3).
 
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