CROSSTALK
The interference of one signal by an adjacent one caused by stray electromagnetic or electrostatic energy. For example audio crosstalk results from leakage, -between the left and the right channels or between different inputs. In video, crosstalk between input channels can be classified into two basic categories: luminance /sync crosstalk and color (chroma) crosstalk. When crosstalk in video is too high, images from one source appear as ghosts on the other. Low crosstalk is an essential feature for any audio and video device and is based on accurate design and proper signal handling. Crosstalk risk gets higher with higher signal frequencies.
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