|
--- | --- |
| F |
- FADE
- The act of increasing or decreasing the voltage level of audio or video signals.
- In audio, a fade-in increases the sound level from silence and a fade-out decreases the sound level until it is no longer audible.
- In video, the act of dissolving a video picture to either a color, pattern or titles. Fading a video image is often used as an artistic tool in video productions, most commonly seen as a fade to black.
- FATHER
- In disc replication, the name typically given to the metal master created in the first step of the electroforming process when the deposited nickel coating is removed from the glass master. The father is an inverted image of the glass master.
- FBR (Fixed Bit Rate)
- The standard method (as opposed to the more efficient VBR) of encoding a digital audio or video stream in order to reduce it’s subsequent file size. FBR encoders maintain a steady data rate regardless of the program content. (See VBR)
- FDDI (Fibre Data Distributed Interface)
- A fibre optic protocol.
- FFT (Fast Fourier Transform)
- The Fast Fourier Transform is one of the cornerstone computational algorithms of digital signal processing (DSP) because it reduces the number of computations needed for any given task.
- FIELD
- One-half of a complete television picture consisting of one complete vertical scan of the video image containing 262.5 line for NTSC and 312.5 lines for PAL. Two fields make up a complete television picture frame. (See INTERLACING)
- FILE SYSTEM
- A data structure that translates the physical (sector) view of a disc into a logical (files, directories) structure, which helps both computers and users locate files. (See LOGICAL FORMAT)
- FILL LIGHT
- Commonly referred to as "scoops," they provide a soft-edged field of light used to provide additional subject illumination to reduce harsh shadows or areas not highlighted by the key light.
- FILM CHAIN
- Projectors, multiplexors and cameras, connected for the purpose of transferring film to video.
- FIREWIRE
- (See IEEE-1394)
- FLICKER
- A strobing picture artifact, similar to an old-time movie effect, mainly related to vertical syncs and video field display rates. Some flicker normally exists due to video interlacing, but is more apparent in 50 Hz systems (PAL) and when converting film (24 fps) to video (30 fps). Flicker may also be a problem when static computer images are transferred to video.
- FLYING ERASE HEAD
- Facilitates smooth, seamless edits whenever the camcorder recording begins. Without a flying erase head, a video "glitch" may occur at scene transitions. The erase head is mounted on the spinning (flying) video head drum.
- FM (Frequency Modulation)
- Frequency modulation is a process used for radio (FM broadcast), wireless microphone systems, television audio transmission and videotape recording. A low frequency (program) signal modulates (changes) the frequency of a high frequency RF carrier signal (causing it to deviate from its nominal base frequency). The original program signal is recovered (demodulated) at the receiver. This system is extensively used in broadcast radio transmission because it is less prone to signal interference and retains most of the original signal quality. In video, FM is used in order to record high quality signals on videotape.
- FORMAT
- A variety of formats are used to record audio and video. They vary by tape width: (8mm, 1/4 inch, 1/2 inch, 3/4 inch, 1 inch and 2 inch), signal form: (composite, Y/C, component), data storage type (analog, or digital) and signal standard (NTSC, PAL, SECAM).
- FRAME
- A complete video image consisting of 2 fields. Also used to describe the total visible area of a video image.
- FRAME SYNCHRONIZER
- A digital electronic device which synchronizes two or more video signals. The frame synchronizer uses one of its inputs as a reference and genlocks the other video signals to the reference’s sync and color burst signals. By delaying the other signals so that each line and field starts at the same time, two or more video images can be blended, wiped and otherwise processed together. (A TBC takes this a step further by synchronizing both signals to a stable reference, eliminating time base errors from both sources.)
- FREEZE (Frame)
- Special effect in which the picture is held as a still image. It is possible to freeze either one field or a whole frame. Freezing one field provides a more stable image if the subject is moving, however, the resolution of the video image is half that of a full frame freeze.
- FREQUENCY RESPONSE
- A measure of the quality of reproduction of various frequencies (audio and video) by a circuit or device. If the frequency response of either a audio or video processor is adequate, there is no deterioration in the sound or image quality at the bandwidth extremes.
 |
We invite the Production Sound and Multimedia communities to link to this web site.
| Copyright ©2008 |