Progressive Segmented Frame (PsF) Recording
Sony CineAlta cameras can record 23.98 or true 24 fps on HDCAM or HDCAM SR tape.
The camera records at 48 fields per second while each progressive frame is placed on
two fields, resulting in 24 fps.
A
B
A
B B
C
C
D D D
A A B B B C C D D D A A B B B C C D D D A A B B
C C D D D A A B
B
B
C
C
D D D A
B
A
B B
C
C
D D
B
D
A
B
A
B B
C
C
D D D
A A B B B C C D D D A A B B B C C D D D A A B B
C C D D D A A B
B
B
C
C
D D D A
B
A
B B
C
C
D D
B
D
Before
(23.98 fps)
A
B
C
D A
D A
B
C
D A
B
C
D A
B
C
D
A B
C D
B
C
A
B
C
D
D
A
B
B
C
C
D
C
A
B
C
D A
D A
B
C
D A
B
C
D A
B
C
D
A B
C D
B
C
Duplicate Frame Insertion
After
(59.94 fps)
Before
(59.94 fps)
After
(23.98 fps)
One second
Duplicate Frame Removal
A
B
C
D
A A
B
B
B
C
C
D D
D
C
C
C
B
1 2 3 4 5
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
6 7
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
20
21
22
23
24
Interlaced frames
19
20
21
22
23
24
One second
Appendix C
Working with 24p Video
423
V