This section summarizes requirements based on new capabilities that support video capture in the Windows 98 and Windows NT 5.0 operating systems. Analog video capture is required for Entertainment PC 98 but not for other PC 98 system types. If this feature is implemented, the requirements in this section must be met.
For requirements related to digital cameras and other digital image input devices, see the “Scanners and Digital Cameras” chapter in Part 4 of this guide.
20. Video input or capture device supports capture of NTSC/PAL picture quality
Required
Video decoders must be capable of decoding 4:3 aspect-ratio, square-pixel 640 × 480/768 × 576 resolution at 30/25 fps at 16 bpp. Decoding of 4:2:2 data format is also required.
21. Analog video capture device outputs video data rate of 3.7 MB per second, minimum
Required
Systems with capture devices must be capable of capturing 3.7 MB per second to disk, providing the user with the ability to capture of 8:1 compression (M-JPEG) of NTSC video.
22. Video input or capture device supports time-code reading
Recommended
Time code is a standard representation of time developed for the video and film industries. Time code is an absolute time format expressed in hours, minutes, seconds, and frames as required by frame-accurate video-editing applications. Separate standards are established for NTSC and PAL systems, as follows:
23. Digital video camera uses external bus support
| Required |
Digital video cameras must provide connectivity using physical wire and driver support to new external buses with isochronous capabilities, particularly USB and IEEE 1394 for high frame-rate devices.
Note: For systems that support video capture and input from multiple sources, it is recommended that the graphics adapter include a video port. For requirements related to implementing a video port, see the “Video port meets PC 98 specifications” requirement in the “Graphics Adapters” chapter in Part 4 of this guide.