Sony Corporation

Yoshiaki Ohgawara

Seiichi Ogawa

Kenichi Ohtsuka

Mitsuaki Murakami

Hideaki Fujii

A helical scan type video tape recorder (VTR) having an editing function mode in which a new video signal can be inserted between a cut-in point and cut-out point on a previously recorded on a video tape. The VTR comprises: a rotary head drum; a rotary video head secured to the rotary head drum for recording video signals on the video tape in a plurality of skewed video tracks; a recording control circuit for supplying a recording current of the new video signal to the video head in response to a recording command signal; a rotary erase head secured to the rotary head drum for erasing a video signal recorded on selected ones of the video tracks, the rotary erase head being positioned to scan the video tracks ahead of the video head by a predetermined interval; and an erasing control circuit for supplying an erasing current, in response to the recording command signal, to the rotary erase head during the editing interval of the editing function mode except for at least one of two intervals in which the rotary erase head traces tracks at the cut-in point and the cut-out point so that the erasing current does not leak to the adjacent track in advance of the cut-in point and to the adjacent track following the cut-out point. Consequently, a fringe effect caused by the operation of the erase head is prevented from affecting other tracks outside the cut-in and cut-out point tracks.

Magnetic recording editing apparatus with erase head

A television receiver capable of reproducing pictures and at least two audio channels from incoming broadcast video signals and also capable of receiving a video and audio signals from a video tape recorder with a video signal being applied to the receiver through one of the unused broadcast channels and the audio signals from the video tape recorder being supplied through a switching circuit to the audio system of the television receiver with an automatic switching arrangement for connecting the audio system to the output of the video tape recorder when the tape video tape recorder is connected to the input of the tuner of the receiver.

Television receiver for receiving sound multiplex signals

A side pincushion distortion correction circuit has an impedance circuit connected in series with the deflection coil in a television receiver. A controllable switch connected in parallel with the impedance circuit is operated by a switching signal, the phase of which is modulated by a combination of a parabolic signal at the vertical rate and a control signal corresponding to the brightness of a reproduced picture on the screen of the television receiver in order to maintain proper correction of side pincushion distortion despite variations in the brightness of a picture reproduced on the cathode ray tube of the television receiver.

Growing community of inventors

Inagi, Japan

Yoshiaki Ohgawara