摘要:
Um für die Übertragung von PALplus-Zusatzinformationen ohne Änderung oder Beeinträchtigung der bisherigen Belegung der vertikalen Austastlücke auszukommen, wird vorgeschlagen, das Datenpaket der Nutzinformationsdaten des PALplus-Datensignals in der von Bildsignalen freien Hälfte der ersten oder letzten aktiven Bildzeile des Fernsehsignals zu übertragen. Empfangsseitig wird die eine, mit Daten belegte Zeilenhälfte selektiert und ausgewertet.
摘要:
A method and apparatus for verifying the proper airing of television programs having a digital identification code recorded on a preselected scan line which is not normally visible to the television viewer. A plurality of television channels are automatically simultaneously monitored by a primary monitoring system (50, 70, 52, 56, 58) at a site (30) within the reception area and broadcast encoded programs are identified and timed and appraised as to their audio and video signal quality. The information generated is stored locally for later comparison with centrally stored (62) information specifying the programs that should have been aired. Each of the channels is sequentially monitored for a preselected fixed time interval, which depends on the number of channels being monitored, under the control of a programmable sequential controller (54). A secondary monitoring system (50A, 70A, 52A, 56A, 58A) is provided for use as a backup or for monitoring cable channels. A recorder (74) responsive to a code recorded in the program signal, is provided for locally recording the final portion of the program.