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Lacquer spincoat

Acrylic lacquer is spincoated in a thin layer on top of the metal reflective layer of a CD to protect it from abrasion and corrosion. Usually a decorative label is also applied on top of the lacquer, but this is not a standard requirement.

Laid finish:

Simulating the surface of handmade paper.

Laminate:

To cover with film, to bond or glue one surface to another.

LAN

Local area network.

Latitude

The range between overexposure and underexposure in which a film will still produce usable images. (Camera)

Lavalier Mic

A small microphone that can be easily hidden on a piece of clothing so as not to be seen by the camera.

Layback

Transfer of the finished audio mix back onto the video edit master.

Layflat:

See Eurobind.

Layoff

Transfer of audio and time code from the video edit master to an audio tape.

Layout

layout -- In DVD authoring, often used to describe the DVD creation step of combining the DVD content and navigational data into a DVD volume on hard disk. Layout multiplexes the video, audio, image, and subpicture streams, together with the navigational information, to create the DVD Volume format directories and files. Also, the result of the layout step - the DVD Volume on hard disk. See also DVD Volume, format, multiplex, premaster.

Layover

Transfer of audio onto multitrack tape or hard disk. Also referred to as "layup."

Leader

A length of nonimage film which is used for threading, identification, or fill-in purposes. (Film Editing)

LED

Light-emitting diode.

Leko

An ellipsoidal reflector spot light. Usually used for theatrical purposes. (Lighting)

Level

The ratio of an acoustic quantity to a reference quantity. A measurement of amplitude in decibels. (Acoustics)

Level

The intensity of an electrical signal.

Lever arm (fader arm)

Typically a "T" shaped handle that is used for manual video transitions on a production switcher. Moving the lever arm between two limits of an arc creates a change in voltage or digital data that is used to control the transition.

Lexan

A plastic sheeting material, available in varying widths, that is optically clear and used to protect camera personnel from explosions or the results of other action. (Grip/Camera)

Library Shot

Stock footage shot or other footage which is germane to a given visual presentation but which was not generated for that specific film or television presentation. (Film Editing)

Light Value

A reference to a fast acting, variable opening shutter to control the light intensity in printing film. (Laboratory)

Light-Struck Leader

Film which was fully exposed to light which is then used as leader. (Film Editing)

Line copy:

 High contrast copy not requiring a halftone.

Line voltage

The voltage level of the main power source to a device.

Linear PCM

Linear PCM (LPCM) -- See PCM.

Lines per inch:

The number of rows of dots per inch in a halftone.

Lip-Sync

The relationship of sound ad picture that exists when the movements of speech are perceived to coincide with the sounds of speech.

Liquid Gate

A printing system in which the original is immersed in a liquid at the moment of exposure. This is done in order to reduce the adverse effects of surface scratches and abrasions.

Lnk

link -- A navigational connection between different elements of a DVD production, including menus and video clips. See also navigation, path.

Log time

That time at which a new source is placed on the program bus, usually recorded in the station log for FCC accounting and customer billing purpose.

Looping

A continuous sound track that runs repeatedly in playback as a guide for re recording. (Post Production)

Loop-through (loop-thru, looping)

A type of video input circuit that provides two or more input connectors. One connector accepts the video input signal for use within the device in question, and the other connector provides a tap off of the input for routing the input signal to another piece of equipment.

Loupe:

A magnifying glass used to review a printed image, plate and position film.

Low Contrast Original

An original reversal film which is designed to yield prints having good projection contrast.

Low Frequency Effects

Low-Frequency Effects (LFE) -- A separate audio channel designed to carry low bass sounds such as explosions and thunder. Used with multichannel surround-sound systems to separate these bass-only sounds that have no perceived directionality, and unburden the strongest bass main channels. Typically, this channel is routed to a subwoofer. This is the ".1" in Dolby Digital (AC-3) "5.1" channel audio.

Lowboy

A heavy duty rolling stand, usually with a combo head, but without the height of a 'highboy'. (Grip/Lighting)

Lowkey

A high contrast lighting style with lost of shadows and large areas of darkness. (Lighting)

Lowpass Filter

A filter that attenuates frequencies above a specified frequency and allows those below that point to pass.

LPI

Dots Per Inch (dpi) defines the resolution of a digital image and Lines Per Inch (lpi) defines the frequency of a halftone screen. Don't get confused by the fact that a halftone screen is made up of dots or that a scanned image is broken down by scanner lines!

Luminance

The measurable, luminous intensity of a video signal. Differentiated from brightness in that the latter is nonrneasurable and sensory. The color video picture information contains two components: luminance (brightness and contrast) and chrominance (hue and saturation). The photometric quantity of light radiation.

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