Glossary

  • Advanced Encryption Standard (AES) | A symmetric-key cipher, used for D-Cinema essence encryption.
  • AS-DCP | Application Specification for Digital Cinema Packaging. The title of SMPTE 429-4, the document that specifies the constrained MXF Operational Pattern used for D-Cinema sound and picture track files.
  • asset | Any file which contains essence or metadata that is part of a composition. Examples include track files and composition playlist files.
  • Asset Map | An Asset Map is a file that provides the links between the asset identifier UUIDs and the names of the files containing the assets.  Its format is defined in SMPTE 429-9, Asset Map and File Segmentation.
  • asset store | A repository that stores asset metadata for the purpose of asset management.
  • bitmask | The decimal equivalent of a netmask created by summing the ones (1s) in a netmask.
  • block cipher | An encryption algorithm that encrypts and decrypts information using the same secret key.  Also known as a Symmetric Key Cipher.
  • CDomain | An area inside Waimea where digital certificates are stored.
  • certificate authority | An organization that creates and issues digital certificates.
  • client | The portion of Waimea software that resides on a computer and is used to interact with a Waimea server.
  • client host | A computer with software to access a Waimea server.
  • CommonName | A portion of the subject information in a Digital Certificate, and used as a human readable label to identify Waimea domains and identities.
  • composition | A complete exhibitable work such as a feature or a trailer or a test signal. A composition is packaged as a composition playlist file and a set of track files.
  • Composition Playlist (CPL) | A representation of a D-Cinema Composition, containing metadata and references to D-Cinema essence. The CPL format is defined in SMPTE 429-7-2006.
  • compression | Reorganizing or combining data in order to reduce its size. There are two types of compression, Loss-less and Lossy.
  • D-Cinema Package (DCP) | A Packing List and all of the files listed in it.
  • DC28 | SMPTE Technology Committee that oversees the development of SMPTE standards for Digital Cinema.
  • default gateway | The IP address of a router or host to which traffic destined for hosts not connected to the local network is forwarded.
  • device certificate | A digital certificate containing the public key for a D-Cinema device. A device certificate is also a leaf certificate.
  • digital certificate | A set of data that describes the holder of the private side of an RSA key pair, and the public key of the key holder.
  • Digital Cinema Distribution Master (DCDM) | A master version of the source essence of a Digital Cinema work. DCDM Picture essence is uncompressed Tagged Image File Format (TIFF). DCDM Sound essence is WAV.
  • digital signature | An encrypted message digest of a document which can be used by a third party to test the authenticity of the document.
  • Digital Source Master (DSM) | A generic term for sound and picture data created during the digital post production process. DSM does not refer to any particular format of data, but an entire class of data formats.
  • Domain | An area inside the Waimea server where certificates and encryption keys are stored.
  • Encryption | Encoding a set of data so as to be unreadable without special information to decode it.
  • Encryption Key | A specially constructed piece of data used to encode or decode encrypted data.
  • essence | The encoded sound or picture data that is stored in track files and is reproduced in the theater.
  • eXtensible Markup Language (XML) | A structured format for storing textual information using defined Elements and Attributes. The XML format is defined by the World Wide Web Consortium.
  • frame rate, fps | The number of frames per second that trackfile essence is intended to be reproduced.
  • Identity | Generically used to describe the electronic files that represent a device. Also, a cryptographic personality used to identity a client to a Waimea server.
  • identity file | A file which contains an asymmetric key and associated digital certificates. The identity file is used by Wailua programs to decrypt KDM files and to sign KDM, CPL and PKL files.
  • IP Address | The IPv4 address used to connect on an IP network.
  • JPEG-2000 | An image compression standard developed by the JPEG group. The base format of JPEG2000 that supports both loss-less and lossy image compression formats. JPEG2000 is defined by ISO/IEC 15444-1:2004.
  • KDomain | An area inside Waimea where encryption keys are stored.
  • Key Delivery Message (KDM) | An XML formatted file containing symmetric keys and their corresponding KeyIDs. The KDM format is defined in SMPTE 430-1-2006.
  • key store | A secure storage facility for managing encryption keys and digital certificates.
  • kii | Pronounced "Kee-ee", Kii is an add-on module for Wailua that offers JPEG 2000 compression and decompression using hardware and and software compression engines.
  • leaf certificate | A digital certificate at the end of a signer chain.
  • loss-less compression | A method of reducing the size of a set of data that preserves enough information to allow exact reconstruction of the input.
  • lossy compression | A method of reducing the size of a set of data by preserving only enough information to reproduce an acceptable facsimile of the input.
  • mapping | A standard for writing one or more D-Cinema packages on a storage device. See Asset Map.
  • Material eXchange Format (MXF) | A file and stream meta-format. MXF provides a set of tools for defining file formats for essence data and metadata. MXF is defined by SMPTE 377M and a family of application specific standards.
  • message digest | A one-way function which provides a short, fixed-length output from an input of arbitrary size. A message digest has the property that very small changes in the input data will result in a significant change in the digest value. The message digest algorithms in used for D-Cinema are SHA-1 and SHA-256, which have output values of 20 bytes and 32 bytes in length, respectively.
  • metadata | Data that describes essence or information in a D-Cinema file.
  • netmask | A sequence of four binary octets that defines the number of hosts in a given IPv4 network.
  • OpenType | A multi-platform font format with extensive support for characters, languages and styles. OpenType is Unicode based. OpenType is defined by ISO/IEC 14496 Part 18.
  • operational pattern | A term of art from MXF, often abbreviated OP. An Operational Pattern is a classification of the complexity of a particular MXF file format. MXF files used for D-Cinema sound and picture use OP-Atom.
  • package volume | A directory in a filesystem that contains one or more D-Cinema packages.
  • Packing List (PKL) | An XML formatted file containing metadata and references to D-Cinema assets. Packing lists are used to describe a set of files being transferred between systems. The Packing List format is defined in SMPTE 429-8.
  • peer | A Waimea server configured to exchange key or certificate information with another Waimea server.
  • playable region | The portion of an AS-DCP trackfile containing essence intended to be reproduced as part of a composition.
  • polling interval | The amount of time, in seconds, between domain consistency checks from a master domain peer to a subordinate domain peer.
  • polling timeout | The amount of time, in seconds, a polling request will wait for a response.
  • Portable Network Graphics (PNG) | A file format used for storing compressed images.
  • public key cipher | A family of algorithm that encrypt data using one half of an asymmetric key pair that can only be decrypted using the inverse algorithm with the other half of the asymmetric key pair. D-Cinema applications use the RSA public key cipher.
  • rating | A label indicating a subjective evaluation of the content in a composition.
  • rating agency | An organization that issues ratings.
  • reel | A contiguous group of scenes in a composition. Also, an element of a Composition Playlist which specifies synchronized regions of a set of track files.
  • Rivest Shamir Adelman (RSA) | A public key algorithm used for digital signatures and key encryption.
  • root certificate | A self-signed digital certificate used by a certificate authority to sign the certificates the authority issues.
  • root certificate | A self-signed digital certificate used by a certificate authority to sign the certificates the authority issues.
  • RSA | A public key cryptography scheme named for its inventors, Rivest,  Shamir and Adleman. See http://www.rsa.com.
  • sample rate | The number of samples per second in a clip of sound essence.
  • SDK | Software Development Kit. The software package used to create customized interfaces to Waimea.
  • signer certificate | A certificate used to sign other certificates. In a certificate chain there are typically one or more signer certificates between the root certificate and the leaf certificate.
  • signer chain | A set of digital certificates consisting of a root (self-signed) certificate and one or more additional certificates. Each certificate in the chain can be used to verify the authenticity of one of the others, forming a directed graph path (no cycles). The certificate at the opposite end of the chain from the root is called the leaf.
  • signer chains | The collection of certificates used to authenticate a leaf certificate. They are called chains because each successive certificate in the chain is signed by the next certificate in the chain.
  • SMPTE | The Society of Motion Picture and Television Engineers.
  • SMPTE 430-1 | The SMPTE Key Delivery Message (KDM) standard.
  • SMPTE 430-2 | The SMPTE Digital Certificate standard.
  • SMPTE 430-3 | The SMPTE Extra Theatre Message (ETM) standard. A KDM is a specific type of ETM.
  • sound format | The organization of audio channels in sound essence or a sound track file, usually referred as the quantity of normal channels and low frequency effect channels, i.e. "2.0", "5.1", 6.1", or 7.1".
  • standard i/o | The standard Input, Output, and Error data devices in a UNIX-like operating system. Often referred to as "stdin", "stdout", and "stderr".
  • symmetric key cipher | See Block Cipher.
  • Tagged Image File Format (TIFF) | A file format used for storing uncompressed images. The TIFF 8.0 specification is published by Adobe Corp.
  • target | The holder of the RSA private key that will decrypt a particular KDM.
  • thumbprint | A Base64-encoded 20 byte value resulting from a SHA-1 message digest calculation.
  • track file | A file which contains sound, picture, timed text or sub-picture essence. A track file contains only one type of essence (though the proposed SMPTE subtitle container will combile multiple types). See also AS-DCP.
  • Unicode | A language-independent standard for encoding character information.
  • Universally Unique IDentifier (UUID) | The name says it all. The UUID format is defined by IETF RFC 4122.
  • unwrapping | The process of extracting data from a structured ('wrapped') format.
  • URN | Uniform Resource Name. The format for a URN is defined by IETF RFC 2141.
  • volume | A directory in a filesystem that contains D-Cinema packages. Also, a measure of the amplitude of an audio signal.
  • waimea peering | A relationship between two or more Waimea servers where certificate or key repository information is shared between them.
  • wave (WAV) | A sound format used to carry PCM audio data. DCDM sound files are usually encoded in this format.
  • wrapping | The process of combining a set of data with additional data to create a new structure.
  • X.509 Certificate | A data structure that combines an asymmetric public key with identifying information such as the name of the holder. The constrained format of digital certificate used for D-Cinema is defined in SMPTE 430-2.
  • XML element | A unit of XML markup used to describe information.