The 24p scan signals are recorded on tape as 60i signals through means of 2:3 pull-down. Similarly, a 30p scan signal is recorded as a 60i signal by dividing each frame into two fields. This allows your 24p and 30p scan footage to be played back or fed to an editing suite using the thousands of Sony HDV equipment already in use throughout the world.
Two recordings modes can be selected depending on your editing requirements for the 24p scan.
The "24" mode should be selected when a 24p (motion) look is desired on 60i material, such as for TV program content. Recordings made in this mode can be edited as typical 60i material.
The "24A" mode should be selected when the material is intended for 24p progressive editing - such as for film productions - using a nonlinear editor compatible with this mode.* Recordings made in this mode can also be edited as typical 60i material.
| * | Interruptions in time code and video may appear between recordings when viewed on an HDV device. These interruptions do not occur after the recording is copied to an i.LINK compatible nonlinear editor system via the i.LINK connection, and the recordings can be correctly edited as normal 24p video clips. |
Leading manufacturers are scheduled to release nonlinear editing software compatible with the "24A" mode. These nonlinear software can detect the 2-3 sequence and remove the 2-3 properly. This way, the editor can create a 24p project, edit precisely at 24fps (23.98 progressive frames per second) throughout the process, and output the final master as:
- A sequence of still images at 24 fps, for film out
- A 23.98 YUV (uncompressed) HD file, for output to Cinealta™ products
- A 23.98 SD MPEG2 file, for the highest quality DVD mastering possible
- A 60i HDV file (2:3 added back in), for creating an HDV edit master
- A 60i YUV (2:3 added back in, uncompressed) HD or SD file, for outputting to Digital Betacam™ or HDCAM™ for broadcast
