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Microsoft Windows Logo Program System and Device Requirements  —  97

If TV out is implemented, the television output adapter must use multiline (three-tap minimum) hardware filtering techniques for flicker reduction. Enable, disable, and adjust capabilities for the flicker filter must be software controllable.

The TV out capability must be able to accept up to a 1024 × 768 progressive desktop and convert it to an interlaced TV resolution output signal.

B4.1.4.R.3 Adapter with TV output supports both 1024 x 768 at 32 bpp VGA and TV output simultaneously.

If TV out is implemented, adapter also supports DVI or VGA and television output. A graphics adapter that supports TV out must also support either DVI or VGA or both. This requirement does not apply to systems with integrated displays. The usefulness of a system is greatly enhanced when any combination of outputs can be active concurrently, but concurrent output support is not required.

B4.1.4.R.4 Software supports positioning.

If TV out is implemented, software must be able to program the television output hardware to position the television image in increments of 4 pixels horizontally and 4 scan lines vertically (or finer). The supported range must be at least +/– 40 pixels horizontal and +/– 20 scan lines vertical.

B4.1.R.2 Adapter defaults to noninterlaced refresh rate if interlace modes are selected.

Support for interlaced display modes is not required. However, if interlaced modes are implemented and the user selects 1024 × 768 resolution, the graphics adapter must default to a noninterlaced refresh rate with the following exceptions:

The attached monitor is not compatible with Display Data Channel (DDC) and the user has not selected a monitor type in the display control panel.

The monitor does not support 1024 × 768 non-interlaced mode, as determined from the Extended Display Identification Data (EDID) or monitor registry settings.

B4.1.R.3 Scaling for DTV-enabled PC

For a DTV-enabled PC, the scaling engine must be able to accept an input with a rate of 720p60 (1280 horizontal pixels) and 540p60 (bobbed from 1080i) (1280 horizontal pixels).

B4.2 Monitors

All general requirements in B1.0 are included by reference. All bus-specific requirements in B2.0 are included by reference.

B4.2.1 Monitors - Windows Compatibility

B4.2.1.1 Monitor INF: "Creating and INF File" in the Windows DDK

See also the “Monitor” sample application in the Windows DDK for information about USB monitor control using Hid.dll.

B4.2.1.2 DELETED
B4.2.1.3 DELETED
B4.2.1.4 Windows compatibility and implementation notes (general)


Note: This is a general reference, not a requirement.

© 1999-2002 Microsoft Corporation. All rights reserved.

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