Abstract: A helical scan tape recorder records VHS video and audio at speeds up to 40× the playback speed of a standard VHS VCR. The recorder employs a high speed scanner operating in a helical scan mode. Input signals feed the scanner through a capacitive coupler. For VHS recording, the scanner has 32 heads mounted on its periphery; 16 video heads and 16 audio heads. An external source of video and associated audio provides 8 channels each of video and audio, and each channel drives 2 heads in parallel. During a half rotation of the scanner, heads fed from the 8 channels contact the tape and are recorded, and during the next half rotation the other group of 8 heads are similarly recording. The audio is delayed so that a segment of video records over its associated audio segment.
Type:
Grant
Filed:
March 18, 1998
Date of Patent:
May 21, 2002
Assignee:
Recording Physics, Inc.
Inventors:
James U. Lemke, James C. Crosby, Robert E. Monteleone, William W. French