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23rd December 2007, 07:57 | #1 | Link |
Emperor building empire
Join Date: Mar 2007
Location: ZAR
Posts: 674
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Difference in Mpeg2 and 480p HD bitrate
What is the difference in Mpeg2 and 480p HD bitrates ?
PAL Mpeg2 has 720x576 = 414,720 pixels @ 25fps (720x480x29 for NTSC)... while 480p HD . . has 853x480 = 409,440 pixels @ 30 fps PAL Mpeg2 has fractionally more detail but 5 fewer FPS than 480p HD. Of course, MP4 has a much better compression algorithm than Mpeg2 ! Given a similar movie released in each format... what kind of differences in bitrate could be expected ? Pascal |
31st December 2007, 06:56 | #3 | Link | |
Emperor building empire
Join Date: Mar 2007
Location: ZAR
Posts: 674
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@ Slogra
Quote:
That said, Apple - iTunes lump it in their HD category... probably because the movies have been digitally re-mastered into Mpeg4-p10 (H264) with 30 FPS. This will certainly benefit newly-made movies which were produced at 30 FPS (60 half-FPS)... but HD and NTSC both suffer from FPS-overkill when it comes to older movies since most were shot at 24 FPS film. PAL remains the re-coders format of choice for older movies @ 25 FPS. Pascal |
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