![]() The audio data on a DVD movie can be Dolby Digital (AC-3), DTS, PCM, or MPEG-1 Audio Layer II (MP2) format. These flags also allow reproducing progressive content at their original, non-interlaced format when used with compatible DVD players and progressive-scan television sets. A DVD player uses these flags to convert progressive content into interlaced video in real time during playback, producing a signal suitable for interlaced TV sets. ![]() Such flags can be added in video stream by the H.262/MPEG-2 Part 2 encoder. Pulldown can be implemented directly while the disc is mastered, by actually encoding the data on the disc at 29.97 frames/s however, this practice is uncommon for most commercial film releases, which provide content optimized for display on progressive-scan television sets.Īlternatively, the content can be encoded on the disc itself at one of several alternative frame rates, and use flags that identify scanning type, field order and field repeating pattern. This is most commonly used to encode 23.976 frame/s content for playback at 29.97 frame/s. The H.262/MPEG-2 Part 2 format supports both interlaced and progressive-scan content, and can handle different frame rates from the ones mentioned above by using pulldown. The MPEG-1 Part 2 format does not support interlaced video.
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