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A Media Block or Integrated Media Block (IMB) is a component in a digital cinema projection system. Its purpose is to convert the Digital Cinema Package [1] (DCP) content into data that ultimately produces picture and sound in a theater in compliance with DCI anti-piracy encryption requirements.
DCI specification [2] allows for two different security system architectures.
In the first the Media Block is outside of the projector. This design is simply referred to as a "Media Block" and is typically a device attached directly to the motherboard of a Digital Cinema server. The media block is usually connected to the projector by dual-link SDI cables. Such media block is limited to processing 2K output, downscaling 4K DCPs if necessary.
The second architecture describes an "Integrated Media Block". This refers to a device attached and integrated directly into the projector, which receives image data from the server, usually via a cat6 Ethernet connection. They can process 2K and 4K output.
Some hardware implementations integrate the entire server on a single board and are able to work both as a MB as well as an IMB. [3] [4]
All security functions are contained within a Secure Processing Block (SPB), a tamper-proof physical device. [5]
Upon ingestion into a DCP server, Key Delivery Messages (KDM) are stored on flash memory in the media block or IMB. A KDM is written to enable the playback of a specific DCP during a specific time window and on a specific media block or IMB, identified by its serial number during the authoring process. Media blocks and IMBs also contain a secure clock that is set in the factory cannot be altered by the end user, which the DCP servers to which they are attached use to determine showtimes. The secure clock prevents theaters from showing encrypted movies outside the times authorized by the KDM (e.g. after it has expired) by simply changing the date and time in the server's BIOS. Media blocks and IMBs also typically include anti-tamper devices, designed to self-destruct the unit if unauthorized modification of its hardware, software or secure clock is attempted.
Digital cinema refers to the adoption of digital technology within the film industry to distribute or project motion pictures as opposed to the historical use of reels of motion picture film, such as 35 mm film. Whereas film reels have to be shipped to movie theaters, a digital movie can be distributed to cinemas in a number of ways: over the Internet or dedicated satellite links, or by sending hard drives or optical discs such as Blu-ray discs.
A secure cryptoprocessor is a dedicated computer-on-a-chip or microprocessor for carrying out cryptographic operations, embedded in a packaging with multiple physical security measures, which give it a degree of tamper resistance. Unlike cryptographic processors that output decrypted data onto a bus in a secure environment, a secure cryptoprocessor does not output decrypted data or decrypted program instructions in an environment where security cannot always be maintained.
High-bandwidth Digital Content Protection (HDCP) is a form of digital copy protection developed by Intel Corporation to prevent copying of digital audio and video content as it travels across connections. Types of connections include DisplayPort (DP), Digital Visual Interface (DVI), and High-Definition Multimedia Interface (HDMI), as well as less popular or now deprecated protocols like Gigabit Video Interface (GVIF) and Unified Display Interface (UDI).
Digital cinematography is the process of capturing (recording) a motion picture using digital image sensors rather than through film stock. As digital technology has improved in recent years, this practice has become dominant. Since the 2000s, most movies across the world have been captured as well as distributed digitally.
Digital Cinema Initiatives, LLC (DCI) is a consortium of major motion picture studios, formed to establish specifications for a common systems architecture for digital cinema systems.
Trusted Platform Module (TPM) is an international standard for a secure cryptoprocessor, a dedicated microcontroller designed to secure hardware through integrated cryptographic keys. The term can also refer to a chip conforming to the standard ISO/IEC 11889. Common uses are to verify platform integrity, and to store disk encryption keys.
A hardware security module (HSM) is a physical computing device that safeguards and manages secrets, performs encryption and decryption functions for digital signatures, strong authentication and other cryptographic functions. These modules traditionally come in the form of a plug-in card or an external device that attaches directly to a computer or network server. A hardware security module contains one or more secure cryptoprocessor chips.
Kaleidescape, Inc. is an American multimedia company based in Mountain View, California. Founded in 2001, it designs multi-room home entertainment server systems that store and play back video and audio content to movie players that can be connected to televisions or projectors.
4K resolution refers to a horizontal display resolution of approximately 4,000 pixels. Digital television and digital cinematography commonly use several different 4K resolutions. In television and consumer media, 3840 × 2160 with a 16:9 aspect ratio is the dominant 4K standard, whereas the movie projection industry uses 4096 × 2160.
A Digital Cinema Package (DCP) is a collection of digital files used to store and convey digital cinema (DC) audio, image, and data streams.
2K resolution is a generic term for display devices or content having a horizontal resolution of approximately 2,000 pixels. In the movie projection industry, Digital Cinema Initiatives is the dominant standard for 2K output and defines a 2K format with a resolution of 2048 × 1080. For television and consumer media, the dominant resolution in the same class is 1920 × 1080, but in the cinema industry this is generally referred to as "HD" and distinguished from the various 2K cinema formats.
A display resolution standard is a commonly used width and height dimension of an electronic visual display device, measured in pixels. This information is used for electronic devices such as a computer monitor. Certain combinations of width and height are standardized and typically given a name and an initialism which is descriptive of its dimensions.
Qube Cinema Technologies is an Indian company operating in film and television technology. It provided digital non-linear editing and digital cinema sound to the Indian market in the 1990s. The company then began work in digital cinema products and deployment during the early years of the century.
Doremi Laboratories, Inc., often shortened to Doremi Labs, was a developer and manufacturer of digital servers and format converters for the digital cinema, broadcast, post-production and professional A/V markets. It was established in 1985 in Burbank, California, United States, and was absorbed into Dolby Laboratories in a 2014 acquisition.
CineAsset was a complete mastering software suite by Doremi Labs that could create and playback encrypted and unencrypted DCI compliant packages from virtually any source. CineAsset included a separate "Editor" application for generating Digital Cinema Packages (DCPs). CineAsset Pro added the ability to generate encrypted DCPs and Key Delivery Messages (KDMs) for any encrypted content in the database. It has since been discontinued, along with CineAsset Player.
CineExport is a plug-in for Apple Compressor used to convert Final Cut Pro sequences and popular media formats to DCI compliant Digital Cinema Packages (DCP) by Doremi Labs. Using the powerful CineAsset encoding engine, CineExport can be used to create JPEG2000 DCP's in the XYZ color space. MPEG-2 and H.264 encoded DCP's can also be created for alternative content and compatible players. Standard and Pro versions are available allowing creation of 2D and 3D DCP's at up to 4K resolution. The Pro version allows the generation of encrypted DCP's along with KDM generation for encrypted content. DCP's created by CineExport are compatible with any standard digital cinema server.
Amazon Fire TV is a line of digital media players and microconsoles developed by Amazon since 2014. The devices are small network appliances that deliver digital audio and video content streamed via the Internet to a connected high-definition television. They also allow users to access local content and to play video games with the included remote control or another game controller, or by using a mobile app remote control on another device.
Dolby Cinema is a premium cinema created by Dolby Laboratories that combines Dolby proprietary technologies such as Dolby Vision and Dolby Atmos, as well as other signature entrance and intrinsic design features. The technology competes with IMAX and other premium large formats such as Cinemark XD and Regal's RPX.
DCI-P3 is a color space defined in 2005 as part of the Digital Cinema Initiative, for use in theatrical digital motion picture distribution (DCDM). Display P3 is a variant developed by Apple Inc. for wide-gamut displays.
DaVinci Resolve is a proprietary color grading, color correction, visual effects, and audio post-production video editing application for macOS, Windows, and Linux, developed by Blackmagic Design. It was originally developed by da Vinci Systems as da Vinci Resolve until 2009, when da Vinci Systems was acquired by Blackmagic Design. In addition to the commercial version of the software, Blackmagic Design also distributes a free edition, with reduced functionality, simply named DaVinci Resolve.
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