Frame size and frame rate
To record moving pictures DVD-Video utilizes either MPEG-2 compression at up to 9.8 Mbit/s (9,800 kbit/s) or MPEG-1 compression at up to 1.856 Mbit/s (1,856 kbit/s).
The following formats are allowed for MPEG-2 video:
At 25 frame/s, interlaced (commonly used in regions with 50 Hz image scanning frequency):
720 × 576 pixels (same resolution as D-1)
704 × 576 pixels
352 × 576 pixels (same as the China Video Disc standard)
At 29.97, interlaced (commonly used in regions with 60 Hz image scanning frequency):
720 × 480 pixels (same resolution as D-1)
704 × 480 pixels
352 × 480 pixels (same as the China Video Disc standard)
The following formats are allowed for MPEG-1 video:
352 × 288 pixels at 25 frame/s, progressive (Same as the VCD Standard)
352 × 240 pixels at 29.97 frame/s, progressive (Same as the VCD Standard)
All resolutions support video with 4:3 frame aspect ratio. Only full D1 resolutions support widescreen (16:9) video, via anamorphic DVD.
MPEG-1 formats do not support interlaced video. MPEG-2 formats support both interlaced and progressive-scan content, with the latter being encoded within interlaced stream using pulldown.
An MPEG-2 encoder can add flags in video stream to indicate scanning type, field order and field repeating. A DVD player uses these flags to convert progressive content into interlaced video suitable for interlaced TV sets. These flags also help reproducing progressive content on progressive-scan television sets.
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