Improved Signal Processing Techniques for Color Television Broadcasting

A new technique for image enhancement permits both vertical and horizontal equalization of an encoded NTSC signal without the generation of black-and-white overshoots and without the use of clippers in the main signal path. A phantom channel is used to improve the long-term drift characteristics of the equalizer. Level dependent equalization and crispening are also employed to permit a maximum of equalization with a minimum introduction of noise. A companion masking amplifier employs low-pass filters in the masking channel to permit optimum live camera, pre-gamma masking without the introduction of noise. When used together these two units produce considerable subjective improvement in the broadcast color signal.

Print ISSN

0361-4573

Published

1968-03

Content type

Original Research

DOI

10.5594/J07030