System for precisely editing audio signals on a videotape

Details System for precisely editing audio signals on a videotape System for precisely editing audio signals on a videotape

1982-01-21

1989-04-04

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Record editing

360 13, G11B 2702

Patent

active

048190870

ABSTRACT:
An editing system for audio signals recorded on magnetic tape comprises a helical scan video tape recorder including a circuit for recording and reproducing the audio signals longitudinally on the magnetic tape, an address signal reproducing circuit for reproducing an address signal recorded on the tape, a tape transporting mechanism for moving the tape, a mode selecting circuit for selecting an operating mode of the video tape recorder, and a circuit for generating pulse signals corresponding to a moving speed of the tape; a monitor circuit for monitoring the audio signals reproduced by the video tape recorder; and an editing control circuit including a speed control circuit for controlling the tape transport mechanism to change the speed of the tape and thereby locate an editing point on the tape, an address signal reading circuit for reading the address signal supplied from the video tape recorder, a counting circuit for counting the pulse signals, a memory for storing output signals from the reading circuit and the counting circuit which are generated when the tape is positioned at the editing point, and a controller circuit for controlling the mode selecting circuit in response to the output signals stored in the memory.

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patent: 4363048 (1982-12-01), Tanaka et al.
patent: 4363049 (1982-12-01), Ohtuki et al.
patent: 4365313 (1982-12-01), Menezes et al.
"A Flexible Digital Sound Editing Program for Microcomputer Systems"; Griffiths et al, J. Audio Engr. Soc., vol. 30, No. 3, Mar. 1982.
"Videotape Editing Systems Using Microprocessors"; Hamalainen, SMPTE Journal, vol. 87, No. 6, pp. 379-382, Jun. 1978.
"Sypher: Videotape Sound Post Dubbing"; Eadon, SMPTE Journal, vol. 87, pp. 504-507, Aug. 1978.
"Applying the SMPTE Tone and Control Code to Television Audio Post Production"; Swetland, SMPTE Journal, Aug. 1978.

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