Setting The 3-2 Pulldown - JVC HDTV Encoder DM-JV600U Instructions Manual

Setting the 3-2 Pulldown

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Encoding image film material
It is required to convert the video signal (Pulldown) in order to view the image recorded with
24 frames per second such as movie film on a system for HDTV video signal that is 30
frames per second (60 field) used in TV broadcasting. Normally, HDTV VTR utilize 3 - 2
Pulldown (Telecine) method to achieve image signal conversion before recording on tape.
When this equipment is encoding signals which have been recorded with 3 - 2 Pulldown
processing, it is possible to encode by automatically skip 24 frames in order to increase
compression ratio. (Inverse Telecine)
3-2 Pulldown auto setting
For 3-2 Pulldown method, the odd number frame is converted to 2 fields and the even num-
ber frame is converted to 3 fields. With this feature, it is possible to convert 2 frames into 5
fields which means that 24 frames could be converted into 60 fields.
Film 1st scene
Field Field
HDTV VTR
1 2
Frame 1
ENCODER
Frame 1
When 3- 2 Pulldown under the Operate Param Menu is set to AUTO, input image signals will
automatically be detected for 3 -2 Pulldown processing information, unnecessary fields will
be discarded and only the original 24 frames will be encoded.
2nd scene 3rd scene
Field Field Field Field
1 2 1 2
Frame 2 Frame 3
Frame 2 Frame 3
4th scene
Field Field Field Field
1 2 1 2
Frame 4 Frame 5
Frame 4