Sony Corporation

Shuichi Ohta

Atsuhiro Kumagai

Yoshio Ozaki

A recording device for digital signals which is able to record high quality signals for a prolonged time on a magnetic tape by effectively utilizing the production equipments or components of the conventional magnetic tape. The present recording device for digital signals records data of the DV format on a magnetic tape 8 mm in width. For example, data of two tracks of the DV format are recorded on a sole track of the magnetic tape of 8 mm width with a data pattern remaining unchanged.

Magnetic recording method and apparatus for digital signals, magnetic reproducing method and apparatus for digital signals and tape-shaped recording medium

A tape cassette with tape reels mounted therewithin having an opening portion formed in one side of the tape cassette and a notched portion formed in the lower surface of the cassette in a position adjacent to the opening portion, wherein a tape wound round the tape reels is passed along the opening portion, characterized by the combination therewith of an improved construction comprising a front cover capable of being opened and closed which covers the front face of the tape passed along the opening portion and an inner cover capable of being opened and closed which covers the back of the tape in an opposed relation to the front cover, whereby the tape is enclosed while being held from before and behind between the front cover and the inner cover and consequently the adhesion of dust or the like to the tape and the damage of the tape can be prevented.

Tape cassette

A telecine projector includes film supply and take-up means; a film constant-speed drive means for advancing the film at an arbitrary predetermined constant speed past a magnetic transducer; a shutter for intermittently illuminating the film at a predetermined constant rate; intermittent film advancing means for advancing the film past the shutter; a film slack detecting means for detecting whether slack in the film between the film advancing means and the film constant drive means exceeds a predetermined amount; and control means for controlling the advancing operation of the film advancing means in accordance with the output of the film slack detecting means. The film can be intermittently advanced in accordance with a film running speed which is arbitrarily predetermined while the shutter operates at the video field frequency. Fast motion reproduction and slow motion reproduction are possible. A guide is provided to prevent the film slack detecting means from falsely indicating an excess of slack upon the occurrence of a splice in the film.

Growing community of inventors

Saitama, Japan

Shuichi Ohta