The Problem of the Unrestored Television Receiver
Robert J. Nissen · Journal of the SMPTE · 1960
It is maintained that correct gray-scale reproduction is the most important parameter of television picture fidelity. Under certain picture conditions, the absence of d-c restoration in the modern home receiver will almost totally destroy proper gray-scale reproduction. Set manufacturers were queried as to their reasons for excluding this critical circuit. To compensate for the unrestored picture, until restoration circuits are again included in the home receiver, operating procedures and standards based on the use of the transmission waveform as a guide are proposed.