G
 

Gaffer

The chief lighting technician for a production who is in charge of the electrical department.

Gain

The ratio of the signal level at the output of an audio device to the signal level at its input. Expressed in decibels (db).

Gain

Any increase or decrease in strength of an electrical signal. Gain is measured in terms of decibels or number-of-times of magnification.

Galley proof:

Text copy before it is put into a mechanical layout or desktop layout.

Gamma

The degree of contrast in a negative or print.

Gang Synchronizer

A synchronizing device having more than One sprocketted wheel which is used to set up synchronized relationships between film and sound tracks which have been recorded to magnetic film. (Film Editing)

Gang:

Getting the most out of a printing press by using the maximum sheet size to print multiple images or jobs on the same sheet. A way to save money.

Gate

The aperture assembly at which the film is exposed in a camera, printer, or projector.

Gate

A signal used to trigger the passage of other signals through a circuit.

Gate array

A set of basic logic gates contained in one integrated circuit.

General purpose interface (GPI)

A parallel interconnection scheme that allows remove control of certain functions of a device. One wire per function.

Generation:

Stages of reproduction from original copy. A first generation reproduction yields the best quality.

Gen-lock (genlock)

To phase-lock the timing of one piece of equipment to another.

Gen-lockable master

A main facility sync pulse generator that is capable of locking to an outside source of video.

Ghost bars:

A quality control method used to reduce ghosted image created by heat or chemical contamination.

Ghosting:

A faint printed image that appears on a printed sheet where it was not intended. More often than not this problem is a function of graphical design. It is hard to tell when or where ghosting will occur. Sometimes you can see the problem developing immediately after printing the sheet, other times the problem occurs while drying. However the problem occurs it is costly to fix, if it can be fixed. Occasionally it can be eliminated by changing the color sequence, the inks, the paper, changing to a press with a drier, printing the problem area in a separate pass through the press or changing the racking (reducing the number of sheets on the drying racks). Since it is a function of graphical design, the buyer pays for the increased cost.

Gigabyte (GH)

A unit for measuring computer memory capacity, equivalent to 1,000 megabytes (MB).

Gloss:

A shiny look reflecting light.

GOP

GOP (Group of Pictures). In MPEG-2 video compression, a short sequence of interrelated frames.

Grain:

The direction in which the paper fiber lie.

GRB (green, red & blue; RGB)

The three primary colors used in video processing, often referring to the three unencoded outputs of a color camera. The sequence of GBR indicates the mechanical sequence of the connectors in the SMPTE standard.

Green

One of the three primary color signals (red, green, and blue) produced by cameras and other video sources.

Greyscale

A greyscale image file contains pixels that are specified as a level of grey, usually between 1 and 255. For every pixel a single byte is used to store this information. Therefore an image containing 9,000 pixels will be around than 9k in size. The halftone screen is applied when the file is output.

Grip Tape

This is Duct tape style tape, also known as gaffer's tape or cloth tape. (Grip)

Grippers:

The metal fingers on a printing press that hold the paper as it passes through the press.

 http://www.cddvdnow.com  | http://www.indieartistsalliance.com