creator Camras, Marvin In the disclosed embodiments the video signal is recorded on successive longitudinal tracks with high frequency bias. The sound may be recorded transversely on adjacent tracks or may be recorded with the video as pulse modulation in the horizontal blanking intervals. The video bias frequency is selected so as to avoid beat notes with the video signal. The horizontal and vertical sync signals may be amplified separate from the composite video and then added thereto so as to record sync signals of increased amplitude. The picture signal from a television receiver may be recorded without further amplification. Submitted by Aric Ahrens (ahrens@iit.edu) on 2011-11-04T19:52:37Z No. of bitstreams: 1 3737568.pdf: 273963 bytes, checksum: 087dde087b7e5af2815360e3ce9d28be (MD5) Made available in DSpace on 2011-11-04T19:52:37Z (GMT). No. of bitstreams: 1 3737568.pdf: 273963 bytes, checksum: 087dde087b7e5af2815360e3ce9d28be (MD5) Previous issue date: 1973-06-05 IIT Research Institute 2009-04-30 1973-06-05 3,737,568 http://hdl.handle.net/10560/2299 en United States Patent Patent reformatted digital application/pdf No Copyright - United States http://rightsstatements.org/page/NoC-US/1.0/ Open Access