Apple Motion 2 - Manual (Page 944)

944 Appendix B Video and File Formats
Standard Definition vs. High Definition Video Formats
Motion is extremely flexible and can work with both highly compressed and
uncompressed video.
Standard Definition Video
Despite having differing frame sizes, NTSC and PAL standard definition video share
certain characteristics.
• Both signals are interlaced, although the field order depends on the video capture
interface used.
• Both signals have a 4:3 aspect ratio, but a 16:9 aspect ratio can be accommodated
either anamorphically or by using letterboxing.
• Both use nonsquare pixels to display the picture.
Analog standard definition formats include S-VHS, Hi-8, and Beta SP.
Digital standard definition formats include Digital Betacam and the D-1 through D-5
formats. Due to the wide variety of compression ratios and types in the different digital
standards, the table below presents more information on these formats.
Standard Definition DV
The frame size of NTSC DV and NTSC analog video differ. NTSC and PAL standard
definition DV video signals are both interlaced, and share a 4:3 aspect ratio using
nonsquare pixels.
Standard Frame size Frame rates Scanning method
NTSC 720 x 486 29.97 Interlaced
PAL 720 x 576 25 Interlaced
Digital format Maker
Color
sampling Compression
ratio Compression
type Recorded bit
rate
Digital
Betacam Sony 4:2:2 2.3:1 DCT 11.9 MB/sec.
D-1 Sony 4:2:2 Uncompressed None 21.5 MB/sec.
D-2 Ampex 4fsc Uncompressed None 11.75 MB/sec.
D-5 Matsushita 4:2:2 Uncompressed None 27.5 MB/sec.
Standard Frame size Frame rates Scanning method
NTSC 720 x 480 29.97 Interlaced
PAL 720 x 576 25 Interlaced
01112.book Page 944 Sunday, March 13, 2005 10:36 PM