Glossary
audio data
Media data produced by an audio recorder, an audio source, or by program algorithms. Audio recording devices take analog or continuous signals and convert them into digital values with specific audio characteristics.
content metadata
Data that describes the content of image media, such as the name of the photographer, and the date and time when a photograph was taken.
heterogeneous media data
Assorted media data, such as audio data, image data, video data, and other types of media data. The data can have a variety of formats, depending upon the application that generated it.
image data
Media data produced by a document or photograph scanner, a video source, other specialized image capture devices, or by program algorithms. Image capture devices take analog or continuous signals and convert them into digital values on a two-dimensional grid of data points known as pixels. Devices involved in the capture and display of images are under application control.
image interchange format
A well-defined organization and use of image attributes, data, and often compression schemes that enables different applications to create, exchange, and use images. Interchange formats are often stored as disk files.
image metadata format
Standard protocols and techniques used to store image metadata within an image file. Formats include EXIF, IPTC-IIM, and XMP.
lossless compression schemes
Compression schemes that squeeze an image so that when it is decompressed, the resulting image is bit-for-bit identical with the original.
lossy compression schemes
Compression schemes that do not result in an identical image when decompressed, but rather, one in which the changes may be imperceptible to the human eye. Lossy schemes generally provide higher compression than lossless compression schemes.
media data
Data from audio, image, DICOM format medical images and other objects, video, or other heterogeneous media.
Oracle interMedia
In Oracle Database 11g Release 1 (11.1), the name Oracle interMedia was changed to Oracle Multimedia.
technical metadata
Data that describes image media in a technical sense, such as the height and width of an image, in pixels, or the type of compression used to store the image.
video data
Media data produced by a video recorder, a video camera, digitized animation video, other specialized video recording devices, or by program algorithms. Some video recording devices take analog or continuous signals and convert them into digital values with specific video characteristics.