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While the PCjr video hardware can use up to 32 KB of RAM for the video buffer, it emulates the CGA precisely by making only 16 KB of this available at address 0xB8000. Like the true CGA, the 16 KB of RAM at 0xB8000 is aliased at address 0xBC000. The Tandy hardware, in contrast, makes the full 32 KB of selected video RAM available at 0xB8000.
For video transfers, transferring a "soft matte" film to a home video format with the full frame exposed, thus removing the mattes at the top and bottom, is referred to as an "open matte transfer." In contrast, transferring a "hard matte" film to a home video format with the theatrical mattes intact is referred to as a "closed matte transfer."
In the picture framing industry, a mat (or matte, or mount in British English) is a thin, flat piece of paper-based material included within a picture frame, which serves as additional decoration and to perform several other, more practical functions, such as separating the art from the glass.
On EGA adapters with only 64KB of video RAM only 4 colors can be selected per pixel. [ 26 ] The 640 × 200 and 320 × 200 graphics modes provide backward compatibility with CGA software and monitors, but they can use the entire sixteen-color CGA palette simultaneously, instead of the smaller four-color palettes that the actual CGA is limited to ...
Letter-boxing is the practice of transferring film shot in a widescreen aspect ratio to standard-width video formats while preserving the film's original aspect ratio. The resulting video-graphic image has mattes of empty space above and below it; these mattes are part of each frame of the video signal.
A frame from a 35 mm film print. Here, the picture is framed for the intended theatrical aspect ratio (inside the yellow box). The picture outside of the yellow box is matted out when the film is shown in widescreen. For 4:3 television and home media versions, a large portion of the picture can be used (inside the red box) with an open matte.