Canon XH A1S, XH G1S instruction manual Selecting the Frame Rate, 60i Mode, 30F Mode, 24F Mode

Selecting the Frame Rate

You can select from the following frame rates depending on the recording mode: HD 60i, 30F, 24F (2:3 pulldown-converted)

SD 60i, 30F, 24F (2:3 pulldown-converted or 2:3:3:2 pulldown-converted)

60i Mode

Records 60 interlaced fields per second, the same as standard-definition TV signals.

30F Mode

HD Records 30 frames per second according to HDV native 1080/30p specifications. For playback, the signal is converted to 60i but video output from the HDV/DV terminal will be 30p.

SD The picture captured by the camera at 30 frames per second is converted and recorded on the tape as 60i.

HD

30F (camera)

A

B

C

D

E

F

G

H

I

J

30p (tape)

A

B

C

D

E

F

G

H

I

J

60i (playback)

a

a

b

b

c

c

d

d

e

e

f

f

g

g

h

h

i

i

j

j

SD

30F (camera)

A

B

C

D

E

F

G

H

I

J

60i (tape/playback)

a a b b c c d d e e f f g g h h i i j j

24F Mode

Records 24 frames per second according to HDV native 1080/24p specifications, creating a true cinematic feel to the picture.

HD Video output from the HDV/DV terminal will be 24p. For playback and video output from the HD/SD SDI

terminal ( only) and the HD/SD COMPONENT OUT terminal, the signal will be down-converted to 60i using the 2:3 pulldown method.

24F (camera)

A

B

C

D

E

F

G

H

24p (tape)

A

B

C

D

E

F

G

H

60i (playback)

a

a

b

b

b

c

c

d

d

d

e

e

f

f

f

g

g

h

h

h

SD

24F (2:3) Mode

Signals are down-converted to 60i using the 2:3 pulldown method. This 24F mode is suited for playback on a TV screen but may require the extension/compression of some frames while editing.

24F (camera)

A

B

C

D

E

F

G

H

60i

a

a

b

b

b

c

c

d

d

d

e

e

f

f

f

g

g

h

h

h

(tape/playback)

24F (2:3:3:2) Mode

Signals are down-converted to 60i using the 2:3:3:2 pulldown method. This 24F mode is ideal for extracting true 24 frames per second in order to transfer to film simply by discarding the 3:3 adjacent frames (bc and fg in the figure).

24F (camera) A B C D E F G H

60i a a b b b c c c d d e e f f f g g g h h (tape/playback)

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