ATIS Telecom Glossary
Wednesday, September 17, 2014

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linear key
In video technology and image processing, a process for the selective overlay of one video image upon another, as through chroma key. Note: Control of the ratio of foreground to background determined by the specifications derived from luminance information, and provided in the linear key data. Ratios to be applied are carried for each picture element in the alpha channel. The process permits realistic rendering of semi-transparent objects. [After SMPTE]

 

 

 

 

 

 

 

 

 

 



 
These definitions were prepared by ATIS Committee PRQC
 
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