OpenWMS Metadata Guide

Source Metadata


Last updated: May 5th, 2009
Name
digitalCharacteristicsSampling
Group Label
Sampling
Schema
rulib
Definition
Sampling is a parent element for three subelements pertaining to the analog-to-digital conversion process, wherein a continuous audio or video signal is analyzed and converted to digital samples.

Sampling subelements are for digital video formats are: samplingSize bitsPerSample wordSize

Sampling subelements for digital audio formats are: samplingRate bitsPerSample wordSize

In the database, this element is a subelement of digitalCharacteristics. Digital Characteristics elements apply to digital files and to digital physical objects such as digital videotape. Digital Characteristics elements are displayed only when the value in the analog/digital flag element is either FILE_DIGITAL or PHYS_DIGITAL.
Repeatable
N
Name
digitalCharacteristicsSamplingSamplingSize
Label
Sampling - Sampling Size
Schema
rulib
Definition
Sampling format as expressed as luminance-chrominance ratio.
Controlled Vocabulary
4:1:1; 4:2:0; 4:2:2; 4:4:4; Other
Repeatable
N
Name
digitalCharacteristicsSamplingBitsPerSample
Label
Sampling - Bits Per Sample
Schema
AES 4.4.16.4.3 (bitDepth)
Definition
The bit depth, or number of bits per sample for the audio or video content of the object. Note that some formats wrap a sample in a larger word size than required for the sample data itself. This element describes the actual number of bits of the sample, whereas wordSize describes the number of bytes used to contain the sample.
Controlled Vocabulary
Videotape, Videodisc. 8-bit; 16-bit; 24-bit; 32-bit; 48-bit
Audiotape; Optical disc. 8-bit; 10-bit; 16-bit; 20-bit; 24-bit; 32-bit; 48-bit; Other [source: rulib]
Repeatable
N
Name
digitalCharacteristicsSamplingWordSize
Label
Sampling - Word Size
Schema
AES 4.4.16.4.5 (wordSize)
Definition
Number of bytes used to represent a single audio or video sample, which generally maps to bits per sample. Files with a bit depth of 24 will usually be expressed as a 3-byte word size; however some applications may store 24-bit video in a 4-byte word.
Format
Positive integer
Example(s)
3
4
Repeatable
N




 
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