Barco Thor Series User Manual page 92

Glossary
is typically emailed to the exhibitor. To create the correct set of KDMs for a site requires knowledge of the
digital certificate in the projection system´s media block.
Digital Cinema Package (DCP)
A Digital Cinema Package (DCP) is a collection of digital files used to store and convey Digital Cinema (DC)
audio, image, and data streams. The term has been defined by Digital Cinema Initiatives (DCI). General
practice adopts a file structure that is organized into a number of usually multi-gigabyte size Material
eXchange Format (MXF) files, which are separately used to store audio and video streams, and auxiliary
index files in XML format. The MXF files contain streams that are compressed, encoded, and encrypted, in
order to reduce the huge amount of required storage and to protect from unauthorized use. The image part is
JPEG 2000 compressed, whereas the audio part is linear PCM. The adopted (optional) encryption standard is
AES 128 bit in CBC mode. The newer SMPTE standards are used to conform the recommendations among
different tool vendors and producers. Interop, the legacy DCP standard, is still required to be supported by
DCP players.
Digital Cinema Initiatives (DCI)
DCI is a joint venture of Disney, Fox, Paramount, Sony Pictures Entertainment, Universal and Warner Bros.
Studios. DCI's primary purpose is to establish and document voluntary specifications for an open architecture
for digital cinema that ensures a uniform and high level of technical performance, reliability and quality control.
Note that the DCI specification is not a standard. Standards for digital cinema are the domain of the Society of
Motion Picture and Television Engineers (SMPTE). "DCI compliant" is a term used to describe products that
conform to the DCI specification. Products that have been tested per the DCI Compliance Test Plan (CTP) are
posted at the DCI compliance web site. Notably, DCI compliance does not require compliance to the full set of
SMPTE DCP standards. A copy of the most recent DCI specification can be downloaded from the DCI website
(http://dcimovies.com).
USB
Universal Serial Bus (USB) is an industry standard developed in the mid-1990s that defines the cables,
connectors and communications protocols used in a bus for connection, communication, and power supply
between computers and electronic devices. USB 2.0 (also called "Hi-Speed"), adding higher maximum
signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s), in addition to the "USB 1.x Full
Speed" signaling rate of 12 Mbit/s.[16] USB 2.0 connectors are usually colored black. USB 3.0 defines a new
SuperSpeed mode with a signaling speed of 5 Gbit/s and a usable data rate of up to 4 Gbit/s (500 MB/s). A
USB 3.0 port is usually colored blue, and is backwards compatible with USB 2.0.
DisplayPort
Digital display interface developed by the Video Electronics Standards Association (VESA). This royalty-free
interface is primarily used to connect a video source to a display device such as a computer monitor, though it
can also be used to transmit audio, USB, and other forms of data. VESA designed it to replace VGA, DVI, and
FPD-Link. Backward compatibility to VGA and DVI by using active adapter dongles enables users to use
DisplayPort fitted video sources without replacing existing display devices.
HDCP
High-bandwidth Digital Content Protection is a form of digital copy protection developed by Intel Corporation to
prevent copying of digital audio and video content as it travels across DisplayPort, Digital Visual Interface
(DVI), High-Definition Multimedia Interface (HDMI), Gigabit Video Interface (GVIF), or Unified Display
Interface (UDI) connections, even if such copying would be permitted by fair use laws. The specification is
proprietary, and implementing HDCP requires a license.
3G-SDI
Serial Digital Interface (SDI) is a serial link standardized by ITU-R BT.656 and the Society of Motion Picture
and Television Engineers (SMPTE). SDI transmits uncompressed digital video over 75-ohm coaxial cable
within studios, and is seen on most professional video infrastructure equipment. The first revision of the
standard, SMPTE 259M, was defined to carry digital representation of analog video such as NTSC and PAL
over a serial interface and is more popularly known as standard-definition (SD) SDI. The data rate required to
transmit SD SDI is 270 Mbps. With the advent of high-definition (HD) video standards such as 1080i and 720p,
the interface was scaled to handle higher data rates of 1.485 Gbps. The 1.485-Gbps serial interface is
commonly called the HD SDI interface and is defined by SMPTE 292M, using the same 75-ohm coaxial cable.
Studios and other video production facilities have invested heavily on the hardware infrastructure for coaxial
cable and have a vested interest in extending the life of their infrastructure. Fortunately, SMPTE recently
ratified a new standard called SMPTE 424M that doubles the SDI data rates to 2.97 Gbps using the same 75-
ohm coaxial cable. This new standard, also called 3-Gbps (3G)-SDI, enables higher resolution of picture
quality required for 1080p and digital cinema.
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