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专利名称：Reciprocating recording method and
apparatus for controlling a video recorderso as to edit commercial messages from arecorded television signal
发明人：Michael E. Koombes申请号：US06/298206申请日：19810831公开号：US04752834A公开日：19880621
摘要：In order to edit commercial messages from an off-the-air video recording of atelevision signal, method and apparatus are disclosed for automatically operating a videotape recorder (VTR) so that it alternates between a normal forward record mode, and arewind or backscan mode in response to the detection of audio and video fade conditionsin the television signal which occur at the beginning and end of each commercial message.A fade detection circuit receives the television signal, while it is being recorded on theVTR, and develops a control signal in response to each detected fade transition such thata single commercial interruption in the television program will be accompanied by a firstand then a second fade transition control signal marking the beginning and end of theinterruption. Two consecutive commercial messages are accompanied by a first, second,and then a final or third fade control signal. Cooperating with the fade detection circuit isa reciprocating editing control which receives the first fade control signal, memorizes thecorresponding location on the tape, and then upon receiving the second fade controlsignal, stops the record mode of the VTR, reverses the tape to the memorized location
of the first detected fade transition, and then restarts the recording operation at thattape location. Succeeding fade control signals cause a repeat of the foregoing reverse-forward sequence such that the later detected fade transition in a series, will position thetape for recording the resumption of the post- commercial program content of thetelevision signal at approximately the same tape position where the recording of theprecommercial program terminated, thereby resulting in a video tape recording of theprogram with commercial interruptions deleted.
申请人：SHELTON VIDEO EDITORS INC.
代理人：Larry A. Jackson
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