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Munir JilaniIT & Broadcast Manager
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CODECAn acronym of Compression, Decompression. A device or piece of software
which takes one file or signal format and translates it to another with an
ideally undetectable loss of quality. Bit-rateThe speed at which bits are
transmitted, usually expressed in bits per second. With video information, in a
digitized image for example, is transferred, recorded, and reproduced through
the production process at some rate (bits/s) appropriate to the nature and
capabilities of the origination, the channel, and the receptor. Balanced AudioA method of transmitting
audio that resists interference by sending a signal and its electrically
inverse signal. Noise pickup along the transmission path is cancelled out as
the two signals are differentially combined at the receiving end. This method
of transmission is designed for long and/or exposed cable runs. Aspect RatioThe ratio of width to
height in a picture. Theatre screens generally have an aspect ratio of 1.85 to
1, widescreen TV (16x9) is 1.77 to 1, and normal TV (4x3) is 1.33 to 1. Aperature, safe titleA safe title aperture
indicates the safe title image area, within which the most important
information must be confined, to ensure visibility of the information on the
majority of home television receivers. Aperature, safe actionA safe action aperture
indicates the safe action image area within which all significant action must
take place, to ensure visibility of the information on the majority of home
television receivers. Aperature, productionA production aperture for a
studio digital video signal defines an active picture area produced by signal
sources such as cameras, telecines, digital video tape recorders, and
computer-generated pictures. It is recommended that all of this video information
be carefully carefully produced, stored, and properly processed by subsequent
digital equipment. Aperature, cleanThe clean aperture in a
video digital system defines an inner picture area (within the production
aperture) within which the picture information is subjectively uncontaminated
by all edge transient distortions. |
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