ACHIEVING THEOPTIMUMPICTUREQUALITYVIACOMPUTER- AIDEDDESIGNMETHODS
Paul J. Whiteneir · 1975
SUMMARY Achieving goodpicture quality inthedesign ofa television receiver ismore ofa design art than itisa strict technical science. Theskills required ofan engineer designing a television pictureIFamplifier ora video amplifier notonlyinclude a thorough knowledge ofelectronic circuit design principles butalso require a feel fortherelationships between picture detail (as seenon the tube), electronic systems, andindividual circuit components.That'feel' forthe properamountof pre-shoot inthesystem's pulse responsewill dictate whether thepicture iscrisp orflat. Inlike manner, excessive over-shoot inthepulse responseineither thepicture IForvideo amplifiers willlead toan 'unnatural' picture. The'feel' fortheproperpulse responseasviewed on thepicture tubeillustrates theuseofartistic qualities intelevision circuit design.This paperdoes notattempt todefine the artistic aspects oftelevision design butrather addresses itself totheproblem relating thepulse responseoftheIFandvideo amplifiers totheindividualcircuit components. Inparticular, this paperisconcerned withthe problem ofrelatingthe pulse response ofa television signal processing system tothefrequency responseofthat system.Theengineer's evaluationofthequality ofa television picture ismost directly related tothetransient responseofthe system.Quality isdefined intermsofthepulse rise time, pre-shoot, andovershoot generated by