公开(公告)号：EP0222772A4

公开(公告)日：1987-09-08

申请号：EP85905354

申请日：1985-10-14

申请人： GREENBERG BURTON L ,  FITZKEE HILLARD L

发明人： GREENBERG BURTON L

IPC分类号： H04H1/00 ,  H04H20/28 ,  H04H60/44 ,  H04N7/087 ,  H04N7/10 ,  H04N7/093

CPC分类号： H04H20/14 ,  H04H20/31 ,  H04H60/44

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.