- image frequency signal
- 镜频信号
English-Chinese electricity dictionary (电气专业词典). 2013.
English-Chinese electricity dictionary (电气专业词典). 2013.
Image frequency — Image frequency: In radio reception using heterodyning in the tuning process, an undesired input frequency that is capable of producing the same intermediate frequency (IF) that the desired input frequency produces. In a heterodyne receiver… … Wikipedia
Image response — (or more correctly, image response rejection ratio, or IMRR) is a measure of performance of a radio receiver, particularly one that operates on the super heterodyne principle.In such a radio receiver, a local oscillator is used to heterodyne or… … Wikipedia
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Image rejection ratio — In reception using heterodyning in the tuning process, the image rejection ratio, or image frequency rejection ratio, is the ratio of (a) the intermediate frequency (IF) signal level produced by the desired input frequency to (b) that produced by … Wikipedia
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Image registration — Registering and summing multiple exposures of the same scene improves signal to noise ratio, allowing to see things previously impossible to see. In this picture, the distant Alps are made visible, although they are tens of kilometers into the… … Wikipedia
image enhancer — TV Video signal processor that compensates for picture detail losses and distortion occurring in recording and playback. Exaggerates transitions between light and dark areas by enhancing high frequency region of video spectrum … Audio and video glossary
Digital signal processing — (DSP) is concerned with the representation of discrete time signals by a sequence of numbers or symbols and the processing of these signals. Digital signal processing and analog signal processing are subfields of signal processing. DSP includes… … Wikipedia