Magnetic recording medium direction sensing
Реферат: ABSTRACT OF THE DISCLOSURE Apparatus for reproducing a video signal From a magnetic tape in; which each field of the video signal is recorded as a respective slant video track on the tape, and a frame code signal identifying the frame of the video signal and a field code signal identifying the field of the video signal are also recorded in each video track, the field code signal being a bit which changes in level between each field and the next following field, the apparatus including a direction sensing circuit for reproducing the least significant bit of the frame code and the field code bit, discriminating the field code bit with the least significant bit of the frame code as a reference, and producing a signal indicating the transport direction of the tape in dependence on this discrimination.
Method of protecting a magnetic recording medium in a magnetic recording/playback system and apparatus therefor
Номер патента: US4701813A. Автор: Kazuya Oda,Kiyotaka Kaneko,Izumi Miyake. Владелец: Fuji Photo Film Co Ltd. Дата публикации: 1987-10-20.