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P2HD
AG-HPX502
X
PRACTICAL GUIDEBOOK
List of Terms
Bayonet Mount
This is a mounting format for lenses that makes them easy to attach and remove. The name derives from the
socket-type fastening mechanism used for mounting bayonets on rifles. The movement used to mount the
lens on the camera works similarly, hence the name. There are three or four pins on the lens mounting
portion and matching slots on the body mounting portion. To mount the lens, you slide the pins into the slots
and then turn the lens to lock it. Most lenses for commercial video cameras and still cameras use bayonet
mounts. Exceptions include wide conversion lenses and the like that employ threaded screw-on mounts.
BNC
BNC stands for "bayonet Neill-Concelman" and is a type of connector for coaxial cables. On the AG-
HPX502, BNC connectors are used for the HD-SDI, VIDEO OUT, T/C, and GENLOCK outputs. These
connectors have comparatively good frequency characteristics and can be made quite compact, so they are
used widely for a variety of communication applications in addition to video signals. The connecting portion
has no threading. Instead, it uses a bayonet mechanism that locks when the connector is inserted and
turned. BNC connectors are compatible with coaxial cables ranging from 1.5D to 5D, among which 5D and
3D cables are widely used in commercial applications.
CAC (Chromatic Aberration Compensation)
The CAC function built into the body of the camera-recorder unit corrects registration error caused primarily
by minute chromatic aberration that cannot be corrected by the lens itself. This helps minimize rainbow color
effects around the periphery of the image.
Clip Thumbnail
Clip thumbnails are miniature stills from video clips recorded on a P2 card that are displayed in a list format.
On the AG-HPX502 a list of clip thumbnails is displayed when you switch from REC mode to MCR mode
(the equivalent of VCR mode in a camcorder using videocassette tape). One thumbnail is displayed for each
clip in the order captured, from top left to lower right. It is also possible to display clip thumbnails in P2Viewer
and some nonlinear editing programs. *1 (The clip thumbnail list cannot be displayed on an external monitor
connected to the camera.)
DSP
DSP stands for "digital signal processor," a type of specialized microprocessor for manipulating digital
signals. The AG-HPX502 is equipped with a high-performance DSP that performs 14-bit A/D conversion and
19-bit "inner processing". It also adjusts the gamma and other settings for the R, G, and B segments of
1080/60p (50p) video signals, as well as performing batch conversion (P/I conversion, line conversion, down
conversion) between HD and SD formats. It is due to this advanced DSP that the AG-HPX502 can produce
high-picture-quality output in any supported video format.
Frame Rate Converter
This converts recording or playback frame rates for only the valid frames in data stored using the Over60p
mode variable frame rate. It plays the frames using the slow- or quick-motion effect that was intended when
the frames were shot. In addition to the AJ-FRC27 hardware used in products such as the VariCam, some
companies also offer plug-in software for non-linear systems.
The AG-HPX502 and AG-HVX202 allow native-mode recording that is only possible by recording onto P2
cards, so that slow- and quick-motion playback on the camera is possible without an FRC.
Gold Mount/V Mount
These are mounting formats used to mount the commercial camera battery on the camera body. They are
types of battery mounts. Gold Mount is the type used by batteries from Anton/Bauer and is included by
default on the AG-HPX502. V Mount is used by batteries from companies such as IDX.
HD/SD-SDI
SDI stands for "serial digital interface," one of the video signal transfer standards used by commercial video
equipment. It allows transfer of uncompressed digital video of standard quality and digital audio over a single
coaxial cable connected using BNC connectors. HD-SDI is the standard for transferring HD video and SD-
SDI is for SD video. The video signal is transferred as both a component signal and as a composite signal,
but these two formats are not compatible with each other.
Hot Swap
This function makes it possible to replace P2 cards that are not in use while the P2cam is operating or
recording.
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