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. Clips lists can be created with the scene selection function of this unit, and with the supplied PDZ-1 Proxy Browsing Software.

Color subcarrier

In a composite video signal, a signal superimposed upon the picture (luminance) information for the purpose of conveying the associated color information. Color and saturation information is conveyed by the phase and amplitude of the color subcarrier. Also called subcarrier.

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.

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 IMX 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 IMX 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.

SDI

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.

SNMP

Simple Network Management Protocol. XDCAM uses this protocol to monitor equipment operating status via network connectors.

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.

Appendix

Glossary 127