Sony PDWF75 User Manual (PDW-F75 Professional Disc Recorder Operating Manual f - Page 131

Glossary, Proxy AV data

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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 IEEE13941995 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).1) 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 highresolution 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 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 Appendix Glossary 131

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131
Glossary
Appendix
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).
1)
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
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