L
laser -
Light amplification by stimulated
emission of radiation; the device that produces this light.
latency
-
In video, the time it takes for the light
from the phosphor screen to decay after the excitation is removed. Long-persistence
phosphor has less flicker of still images, but more blurring of moving images.
level one videodisc applications -
Interactive
applications based on manual keypad functions, picture stops, and chapter
stops.
level three videodisc applications
-
Interactive applications controlled by an external
computer that uses the videodisc player as a peripheral device.
level
two videodisc applications -
Interactive applications
controlled by the keypad and the videodisc player's internal computer. The
control program is recorded on the videodisc itself.
LIB
-
Dynamic-link definition library. A file containing
the data needed to build a program .EXE file but which does not contain
the dynamic-link programs themselves. Contrast with dynamic-link library.
light pen -
A light-sensitive
pick device that is used by pointing it at the display surface.
line
graphics -
Synonym for coordinate graphics.
line pairing -
A
faulty interlace pattern in which the lines of the second field begin to
pair with the lines of the first field rather than fit exactly within them.
linear audio -
The
analog audio on the linear track of videotape that can be recorded without
erasing existing video; used for audio dubbing after video is edited.
linear
video -
A sequence of motion footage played
from start to finish without stops or branching, like a movie.
link
-
A one-way link (directed edge) from one instance
to another. If an instance wishes to send a message, it is sent along all
the links from it. An instance can have any number of links coming from
it, and any number of other instances can have links to it. An instance
cannot select along which links the message should be sent. See also slot.
(RTMIDI-specific term)
LIST chunk -
A
chunk that contains a list or an ordered sequence of subchunks.
list
type -
(1) A field in the first four bytes of
the data field of a LIST chunk. (2) A four-character code identifying the
contents of the list.
locked memory -
An
area of memory that is not available for use because it is being held by
another process.
long shot -
(1)
A camera angle that reveals the subject and the surroundings. Often used
as an establishing shot. (2) Synonym for wide shot.
LS
-
Script abbreviation for long shot.
luminance signal -
The
portion of image information that provides brightness. Alone, luminance
provides a monochrome image.
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