Guard band
From Wikipedia, the free encyclopedia
Guard band has several meanings.
[edit] Radio and electronic signalling
In radio, a guard band is an unused part of the radio spectrum between radio bands, for the purpose of preventing interference.
It is a narrow frequency range used to separate two wider frequency ranges to ensure that both can transmit simultaneously without interfering each other. It is used in TDM/Time division multiple access/FDM/Frequency division multiple access. It may be used in both wired or wireless communications, so that adjacent frequency bands on the same media can avoid interference.
[edit] Recording
In sound, video, or data recording, it refers to the unrecorded space between tracks on magnetic tape or other magnetic media which prevents the signal on adjacent tracks from interfering with each other.
[edit] Quality assurance
In the realm of product quality control, it is the amount that minimum product specifications are increased to ensure that even with measurement uncertainty the product meets the minimum specifications with a specified level of confidence.
[edit] Computer graphics
In computer graphics, the guard band is a virtual area of the screen bordering the real screen to which any rendering is ignored, used to simplify clipping. This technique is called guard band clipping.
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