D

DACL

See definition for: discretionary access control list (DACL)

decrypt

To convert encrypted content back into its original form.

deinterlace

To combine the interlaced fields in a video frame so that, during playback, the lines of the video frame are painted sequentially. See also: interlace

delta frame

A video frame that contains only the changes from the previous frame. In contrast, a key frame contains all the data necessary to construct that frame.

digital rights management (DRM)

A technology that provides a persistent level of protection to digital content by encrypting it with a cryptographic key. Authorized recipients (or end users) must acquire a license in order to unlock and consume the content.

discretionary access control list (DACL)

The part of an object’s security descriptor that grants or denies specific users and groups permission to access the object. Only the owner of an object can change permissions granted or denied in a DACL; access to the object is thus at the owner’s discretion.

distribution server

A server running Windows Media Services that publishes content received from another streaming source, such as an encoder or another Windows Media server.

download

To transfer a file over a network in response to a request from the device that receives the data. Downloaded content is kept on the receiving device for playback on demand. In contrast, streamed content is played as it is delivered.

DRM

See definition for: digital rights management (DRM)

dynamic range

The difference (in decibels) between the quietest and loudest sounds in a single piece of audio content.