Warning!

This is an old revision. Go to current revision

Last modified date is: 2017-10-13

Graphical representation

Diagram

General description

Name:	Digital Video
Submitted by:	PanagiotisMitzias, MarinaRiga, EfstratiosKontopoulos
Also Known As:
Intent:	The pattern intends to model digital video files, their components and other associated entities, such as codecs and containers. This pattern has been developed by MKLab at CERTH/ITI for the PERICLES FP7 project.
Domains:	Multimedia
Competency Questions:	What does a digital video file consist of? A digital video file usually consists of one or more streams. These streams are compressed using codecs (coder-decoder) and wrapped into a container. What types of streams exist in a video file? Video streams audio streams and subtitle streams. A video file has at least one video stream and may also have any number and any type of other streams. What types of codecs exist? Video and audio codecs.
Solution description:	The pattern’s main entity is a digital video file (DigitalVideo). Appropriate object properties connect the video file with codecs, streams, containers, etc. Additionally, the model includes the most significant descriptors for all the previous notions, such as bitrate, aspect ratio, compression type, etc.
Reusable OWL Building Block:	1 (479)
Consequences:	The design pattern is expected to facilitate the creation of digital video domain ontologies that will be exploited in the field of digital preservation. A well-established, comprehensible pattern will prove to be advantageous.
Scenarios:	The digital video is wrapped by an AVI container. The digital video has duration 22 minutes. The video stream is processed by the QuickTime codec. The audio stream has bitrate 256 kbit/s.
Known Uses:
Web References:
Other References:
Examples (OWL files):
Extracted From:
Reengineered From:
Has Components:
Specialization Of:
Related CPs:

Elements

The DigitalVideo Content OP locally defines the following ontology elements:

DigitalVideo (owl:Class) A digital video file.

DigitalVideo page

Codec (owl:Class) A codec is a device or computer program capable of encoding or decoding a digital data stream or signal.

Codec page

AudioCodec (owl:Class) An audio codec is a device or computer program capable of coding or decoding a digital data stream of audio. E.g. MP3

AudioCodec page

VideoCodec (owl:Class) A video codec is an electronic circuit or software that compresses or decompresses digital video, thus converting raw (uncompressed) digital video to a compressed format or vice-versa. E.g. QuickTime H.264 (Apple's implementation for H.264/MPEG-4 AVC coding format)

VideoCodec page

Stream (owl:Class) A (data) stream is a sequence of digitally encoded coherent signals (packets of data or data packets) used to transmit or receive information that is in the process of being transmitted. The term stream is used here to define raw, uncompressed content (video or audio) prior to being encoded into a wrapper or after being decoded from a wrapper.

Stream page

AudioStream (owl:Class) An audio stream is a stream where the carried data is audio content.

AudioStream page

VideoStream (owl:Class) A video stream is a stream where the carried data is video content.

VideoStream page

SubtitleStream (owl:Class) A subtitle stream is a stream where the carried data is subtitle content for a video.

SubtitleStream page

Container (owl:Class) A container or wrapper format is a metafile format whose specification describes how different elements of data and metadata coexist in a computer file. E.g. Matroska (MKV), MP4, etc.

Container page

Descriptor (owl:Class) Descriptors are the various elements describing a digital video, a container, a stream or a codec.

Descriptor page

AnalogBroadcastStandard (owl:Class) The video color encoding system, if the video originates from analog television broadcasts. E.g. NTSC, PAL, etc.

AnalogBroadcastStandard page

AspectRatio (owl:Class) The aspect ratio of an image describes the proportional relationship between its width and its height. It is commonly expressed as two numbers separated by a colon, as in 16:9. E.g. 16:9, 4:3, etc.

AspectRatio page

Bit Rate (owl:Class) The bitrate is the data rate for a video or audio file. Video and audio data rates are given in bits per second. E.g. 2 MBits/s

BitRate page

ChromaFormat (owl:Class) The chroma subsampling type. Chroma subsampling is the practice of encoding images by implementing less resolution for chroma information than for luma information, taking advantage of the human visual system's lower acuity for color differences than for luminance. E.g. 4:2:0

ChromaFormat page

CodingStandard (owl:Class) Also known as coding format or compression format. E.g. H.264/MPEG-4 AVC

CodingStandard page

ColourSpaceType (owl:Class) A color space is a specific organization of colors. It allows for reproducible representations of color, in both analog and digital representations. A color space may be arbitrary, with particular colors assigned to a set of physical color swatches and corresponding assigned names or numbers. E.g. YUV, RGB, etc.

ClourSpaceType page

CompressionType (owl:Class) The type of video compression. E.g. lossy, lossless or uncompressed

CompressionType page

EmbeddingType (owl:Class) The type of embedment used to attach a subtitle stream to a video. E.g. hard, prerendered, soft, etc.

EmbeddingType page

FrameRate (owl:Class) Frame rate, also known as frame frequency, is the frequency (rate) at which an imaging device produces unique consecutive images called frames. The term applies equally well to film and video cameras, computer graphics, and motion capture systems. Frame rate is most often expressed in frames per second (FPS) and is also expressed in progressive scan monitors as hertz (Hz). E.g. 60 FPS

FrameRate page

FrameSize (owl:Class) The dimensions of a video's frame. E.g. 1920 x 1080

FrameSize page

PlaybackDuration (owl:Class) The duration of a video, video stream or audio stream. E.g. 22 minutes

PlaybackDuration page

RangeType (owl:Class) The type of range a video is created for. E.g. broadcast range or full range

RangeType page

SampleRate (owl:Class) The audio sample rate is the number of samples of audio carried per second, measured in Hz or kHz (one kHz being 1 000 Hz). For example, 44 100 samples per second can be expressed as either 44 100 Hz, or 44.1 kHz.

The video sample rate of a digital video format determines how often the light intensity of each video line is sampled.

E.g. 96 kHz, 74.25MHz, etc.

SampleRate page

ScanType (owl:Class) Progressive or interlaced scan.

ScanType page

SetOfStandards (owl:Class) Sets of standards standardize the format of a video stream. E.g. BT.601 or BT.709

SetOfStandards page

E.g. SubRip, SubViewer, etc. (owl:Class) The file format of subtitles.

SubtitleTextFormat page

VideoCodecLevel (owl:Class) A video codec level is a specified set of constraints that indicate a degree of required decoder performance for a profile. E.g. 4

VideoCodecLevel page

VideoCodecProfile (owl:Class) The video codec profile is a set of capabilities and constraints apllied in the encoder. It allows the decoder to recognize the requirements to decode a specific stream. E.g. baseline profile, extended profile, main profile, high profile, etc.

VideoCodecProfile page

VideoQualityMeasurement (owl:Class) Measurement carried out according to the video quality metric.

VideoQualityMeasurement page

VideoQualityMetric (owl:Class) Process or software used to measure the quality of a video. E.g. VQM

VideoQualityMetric page

YUVSampleRange (owl:Class) YUV Sample Range E.g. 16-235

YUVSampleRange page

hasBitRate (owl:ObjectProperty) Associates an audio or video stream with a bit rate.

hasBitRate page

wrappedBy (owl:ObjectProperty) Associates a digital video file with a container type.

wrappedBy page

hasStream (owl:ObjectProperty) Associates a digital video with a stream.

hasStream page

hasAudioStream (owl:ObjectProperty) Associates a digital video with an audio stream.

hasAudioStream page

hasVideoStream (owl:ObjectProperty) Associates a digital video with a video stream.

hasVideoStream page

hasSubtitleStream (owl:ObjectProperty) Associates a digital video with a subtitle stream.

hasSubtitleStream page

hasCodingStandard (owl:ObjectProperty) Associates a video or audio stream with a coding standard.

hasCodingStandard page

hasRangeType (owl:ObjectProperty) Associates a video stream with a range type.

hasRangeType page

hasVideoQualityMeasurement (owl:ObjectProperty) Associates a video stream with a video quality measurement.

hasVideoQualityMeasurement page

hasChromaFormat (owl:ObjectProperty) Associates a video stream with a chroma format.

hasChromaFormat page

hasEmbeddingType (owl:ObjectProperty) Associates a subtitle stream with an embedding type.

hasEmbeddingType page

hasAspectRatio (owl:ObjectProperty) Associates a video stream with an aspect ratio.

hasAspectRatio page

hasSubtitleTextFormat (owl:ObjectProperty) Associates a subtitle stream with a subtitle text format.

hasSubtitleTextFormat page

hasVideoQualityMetric (owl:ObjectProperty) Associates a video stream with a video quality metric.

hasVideoQualityMetric page

hasCompressionType (owl:ObjectProperty) Associates a video or audio codec with a compression type.

hasCompressionType page

hasScanType (owl:ObjectProperty) Associates a video stream with a scan type.

hasScanType page

hasVideoCodecProfile (owl:ObjectProperty) Associates a video codec with a video codec profile.

hasVideoCodecProfile page

hasColourSpaceType (owl:ObjectProperty) Associates a video stream with a colour space type.

hasColourSpaceType page

hasFrameSize (owl:ObjectProperty) Associates a video stream with a frame size.

hasFrameSize page

hasSetOfStandards (owl:ObjectProperty) Associates a video stream with a set of standards.

hasSetOfStandards page

processedBy (owl:ObjectProperty) Associates a stream with a codec.

processedBy page

hasAnalogBroadcastStandard (owl:ObjectProperty) Associates a digital video with an analog broadcast standard.

hasAnalogBroadcastStandard page

hasVideoCodecLevel (owl:ObjectProperty) Associates a video codec with a video codec level.

hasVideoCodecLevel page

hasFrameRate (owl:ObjectProperty) Associates a video stream with a frame rate.

hasFrameRate page

hasPlaybackDuration (owl:ObjectProperty) Associates a digital video, a video stream or an audio stream with a playback duration.

hasPlaybackDuration page

hasYUVSampleRange (owl:ObjectProperty) Associates a video stream with a YUV sample range.

hasYUVSampleRange page

hasSampleRate (owl:ObjectProperty) Associates a video stream or audio stream with a sample rate.

hasSampleRate page

Additional information

Scenarios

Scenarios about DigitalVideo

No scenario is added to this Content OP.

Reviews

Reviews about DigitalVideo

There is no review about this proposal.

Some subquery has no valid condition.

This revision (revision ID 13288) takes in account the reviews: none

Other info at evaluation tab

Modeling issues

Modeling issues about DigitalVideo

There is no Modeling issue related to this proposal.

Some subquery has no valid condition.

References

Add a reference

	Submission to event WOP:2015

Submissions:DigitalVideo Revision as of 10:00, 13 October 2017 by EfstratiosKontopoulos (Talk | contribs) (diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)