back porch (English, noun)
expansion: back porch (plural back porches)
Senses:
glosses: A porch at the rear of a building.
topics: broadcasting
media
television
glosses: The portion of each scan line between the end (rising edge) of the horizontal sync pulse and the start of active video, used to restore the black level reference in analog video.
Forms:
form: back porches
tags: plural
form: backporch
tags: alternative