Introduction: Features
21
Intr
od
uc
tio
n
■
Built-in up/down/cross converter for output and
up converter for input
The AJ-HPD2500 provides a built-in up/down/cross converter
for output as standard. It also up-converts composite and SD-
SDI input signals to record in the same HD format as the
system.
◆
NOTE:
• The cross converter function is not available during up-conversion
recording.
• SD closed caption signals during up-conversion recording are
recorded in the 608 HD (VANC) signal format (59.94 Hz only).
• Closed caption signals are not output during playback with down-
and cross-conversion.
• Nor are closed caption signals output during playback of up-
converted SD signals.
■
Frame rate conversion
Recording input from variable frame-rate cameras at 24PN
(Native), the unit is also capable of playing back cards
recorded at 24 fps and converting the output to 1080/24 PsF.
It can also record input from a variable frame-rate camera at
25PN (Native).
◆
NOTE:
• Do not use cards that have been edited or contain clips shot in
different formats as the loss of management data may prevent
normal playback.
■
Native recording
The unit provides support for native recording, a mode that
records only active frames. This provides longer recording
time when a VariCam, AJ-HPX2000/2100 or AJ-HPX3000 is
connected to the HD-SDI IN connector. Variable frame rate
(VFR) recording becomes possible by connecting a VariCam.
●
Native recording defined
Native recording extracts only the active frames during
1080i AVC-Intra recording as well as 720P DVCPRO HD
and AVC-Intra recording. At 720P, this lengthens the
recording time 2 to 2.5 times over pull-down recording.
During native recording at a 59.94 Hz or 50 Hz setting in
setup menu No. 25 (SYSTEM FREQ), the unit produces pull-
down output.
■
4U rack mount
Use the optional rack mount adapter (AJ-MA75P) to place the
4U-size unit in a 19-type rack.
B
A
C
D
Ao Ae Bo Be Bo Ce Co De Do De
B
A
D
C
B
A
C
D
A
B
B
C D
D
D
B
A
C
D
Example of 1080-24PN (Native)
Example of 720-24PN (Native)
Camera video
2:3 pull-down
Native recording
Camera video
2:3 pull-down
Active frames
Native recording
