Glossary - Sony PDW-HD1500 Operation Manual

Glossary

AES/EBU
A standard established jointly by the
AES (Audio Engineering Society)
and EBU (European Broadcasting
Union) for serial transmission of
digital audio. Two channels of audio
can be transmitted via a single
connector.
Clip
A recording unit. Clips are created
every time recording starts and stops.
Clip list
A list of locations in the material
recorded on the disc, arranged in any
order. Clip lists can be created with
the scene selection function of this
unit, and with the supplied PDZ-1
Proxy Browsing Software.
Composite video signal
A video signal in which luminance
and chrominance are combined along
with timing reference "sync"
information to make composite
video.
Drop-frame mode
SMPTE time code runs at 30 frames/
second, while the NTSC color
television system runs at about 29.97
frames/second. Drop-frame mode
adjusts the running of time code to
eliminate the discrepancy between
time code value and actual time by
dropping two frames from the time
code value at the beginning of each
minute except every tenth minute.
E-E mode
Electric-to-Electric mode. When you
operate a VDR in E-E mode, input
video and/or audio signals pass
through electric circuits only and
then come out from the output
connectors, without passing through
electromagnetic conversion circuits
such as recording heads.
Essence mark
A type of metadata that may be set for
a specified frame.
For more efficient searches,
XDCAM equipment records essence
marks as part of Non-RealTime
metadata, and uses them to display
thumbnails.
HD tri-level sync
An HDTV analog reference signal
that applies to 59.94/50Hz systems.
A sync signal defined in SMPTE
274M with positive, negative, and
zero values.
HDSDI signal
Abbreviation of HD Serial Digital
Interface.
A signal in the HDTV serial interface
defined by SMPTE 292M.
i.LINK
Another name for the IEEE1394-
1995 standards and their revisions.
XDCAM uses the i.LINK interface to
transfer DV streams by the AV/C
protocol, and to read and write
MPEG HD and DVCAM data files
by FAM (file access mode).
Metadata
Information about the properties of
video and audio content. XDCAM
records metadata such as UMIDs and
essence marks, and the supplied
PDZ-1 Proxy Browsing Software can
be used to record information such as
titles and comments.
MXF
Material eXchange Format. A file
exchange format developed by the
Pro-MPEG Forum. Equipment from
different manufacturers can
exchange files in this format.
Non-audio
General term for audio signals other
than linear PCM, such as Dolby E
1)
and Dolby Digital (AC-3).
XDCAM can record non-audio as an
input signal.
1) Dolby is a trademark of Dolby Laboratories.
Non-drop-frame mode
A mode of advancing time code
which ignores the difference in frame
values between real time and the time
code. Using this mode produces a
difference of approximately 86
seconds per day between real time
and time code, which causes
problems when editing programs in
units of seconds using the number of
frames as a reference.
Proxy AV data
Low-resolution data with a video
bandwidth of 1.5 Mbps and an audio
bandwidth of 64 kbps per channel.
This unit records proxy AV data
automatically whenever high-
resolution MPEG HD or DVCAM
data is recorded.
Reference video signal
A video signal that contains a sync
signal or sync and burst signals, used
as a reference for synchronization of
video equipment.
SDSDI signal
SD Serial Digital Interface. An
interface standardized as SMPTE
259M which enables the
transmission of an uncompressed
digital component stream.
S/N
Signal-to-Noise ratio. The relation of
the strength of the desired signal to
the accompanying electronic
interference, the noise. If S/N is high,
sounds are reproduced with less noise
and pictures are reproduced clearly
without snow.
Sub clip
One of the sections which make up a
clip list. A sub clip may be part of a
clip or an entire clip.
Thumbnail image
A reduced still picture of video for
display on a GUI screen. XDCAM
creates thumbnail images from proxy
video, and displays them as index
1)
pictures on GUI screens.
Time code
A digitally encoded signal which is
recorded with video data to identify
each frame of the video by hour,
minute, second and frame number.
SMPTE time code is applied to
NTSC system, and EBU time code to
PAL and SECAM systems.
UMID
Unique Material Identifier. A
standard (SMPTE 330M) for video
and audio metadata. The Basic
section of a UMID contains a
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Glossary