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Numbers
Glossary "L"
Label In CD manufacturing, the printed label on the disc itself. This is printed either by screen printing, pad printing or offset printing. In the music business a “Label” is the music company or division thereof which releases the music into the market place (RCA, Concord Jazz, BMG, etc.).
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, corrosion, and scratches. Usually a decorative label is also applied on top of the lacquer, but this is not a standard requirement.
Layer The plane of a DVD disc on which information is recorded in a pattern of microscopic pits. Each DVD side can hold one or two layers; the first layer is Layer 0, the second is Layer 1. related: A DVD Video 5 is one layer, one side; DVD-9 is one side, two layers; DVD 10 is two sides, one layer; and, DVD-18 is two sides, two layers.
Lead In On a CD, the area at the beginning of a disc in which is recorded the Table of Contents. (TOC) The TOC contains a listing of where the tracks start. On a master tape,the area at the beginning of the tape which is recorded with Os (digital silence/video black) as a precursor to the user information to be recorded on the disc.
Lead Out Area A buffer area after the last track on a disc, in case the player reads past the last track. When the player reads the lead out code, it either goes back to the beginning of track # 1 or it stops playing, depending on how the player has been programmed or set.
Legacy Term used to describe the hybrid disc that can be played in both a DVD player and a CD player.
Less-than-full tray A tray that contains mail for a single destination that was not preceded by a full tray for that destination. Less-than-full trays may be prepared only if permitted by the standards for the rate claimed.
Letter According to the Private Express Statutes, a message directed to a specific person or an address and recorded in or on a tangible object. Also a shortened way to refer to letter-size mail.
Letterbox The use of black horizontal mattes added to the top and bottom of display area in order to create a frame in which to display video using an aspect ratio different than that of the display unit itself. Letterbox preserves entire video picture, unlike the pan & scan method of framing the “most relevant” areas of the image. DVD players can automatically letterbox a widescreen picture for display on a standard 4:3 TV.
Letter-size mail A mail processing category of mailpieces, including cards, that do not exceed any of the dimensions for letter-size mail (that is, 11-1/2 inches long, 6-1/8 inches high, 1/4 inch thick).
Library Mail A subclass of Package Services for items sent to or from or exchanged between academic institutions, public libraries, museums, and other authorized organizations. Books, sound recordings, academic theses, and certain other items may be mailed at the Library Mail rate if properly marked.
Line-of-travel (LOT) sequence A sequence required for some Enhanced Carrier Route and carrier route rates in which mailpieces are arranged by ZIP+4 codes in the order in which the route is served by the carrier. The mailpieces are sequenced in delivery order.
Lithography A general printing term/process operating on the principal that oil and water do not mix. A plate etched with the image is watered, ink will adhere to the etched areas, but not to the watered areas
Lossless compression compression technique that provides a minimum of file size reduction but with no data (thus quality) loss.
Lossy compression compression technique that provides for great file size reduction but at a directly related reduction in quality.
LPI Lines per Inch. Used in determining screen mesh in silk screen printing process.
LTR (or LTRS ) An abbreviation used on mail container labels that identifies the contents as letter-size pieces.
Luminance The monochrome component of a color video signal. Often designated as the “Y” signal in component video formats.