Hitachi, Ltd.

Takeo Ohkouchi

Hideo Nishijima

Kaneyuki Okamoto

Yukinobu Tada

Masayuki Kijima

Hiroo Okamoto

Nobutaka Amada

Yasunori Ohara

Akira Saitou

Noboru Katohno

Eiji Moro

Susumu Ohtsuka

Yukihiko Ozaki

Hiroyoshi Matsumoto

An image recording and reproducing apparatus can record and reproduce both a digital signal and an analog signal. Operations of a broadcast receiving apparatus and a recording and reproducing apparatus are integrated, and superimposition of information on an analog image is realized during recording and reproduction of a digital signal. The broadcast receiving apparatus and the recording and reproducing apparatus communicate with each other to be able to set and obtain states of the opposite apparatus, so that one of the apparatus notifies information of the other apparatus to a user, and causes the user to set the information in a picture having the same form as a picture used to notify a state of one apparatus to the user, and causes the user to set the state.

Image recording and reproducing apparatus

An image recording and reproducing apparatus can record and reproduce both of a digital signal and an analog signal. Operations of a broadcast receiving apparatus and a recording and reproducing apparatus are integrated and superimposition of information on an analog image is realized during recording and reproduction of a digital signal. The broadcast receiving apparatus and the recording and reproducing apparatus communicate with each other to be able to set and obtain states of the opposite apparatus, so that one of the apparatus notifies information of the other apparatus to a user and causes the user to set the information in a picture having the same form as a picture used to notify a state of one apparatus to the user and to cause the user to set the state. Further, before information is superimposed on an analog image signal, a signal conforming in phase to a reference signal of a digital signal is produced in a servo circuit and a reference signal of an analog image signal is supplied to an analog OSD circuit during superimposition of information. At the same time, a reference signal used in the servo circuit is changed over to the reference signal produced in the servo circuit. Thus, the user's operation is simplified.

On the occasion of stopping the tape running at a high speed, a winding radius of the tape supply reel is detected to set the tape deceleration rate (a) on the basis of the detected winding radius of the supply reel. After the tape running speed is decelerated up to the allowable speed VL in the predetermined deceleration rate (a), the tape is stopped by effectuating the brake. Thereby, the tape can be driven at the speed higher than the allowable speed VL without generating any damage, enabling reduction of time required for the fast-forward/rewind operation. Moreover, application flexibility is improved by providing a couple of tape running modes at the first high speed V1 which is higher than the allowable speed VL and the second high speed V2 which is lower than the allowable speed VL. In addition, running of the tape can be ceased within the predetermined time t from the input of the stop command signal by specifying the maximum speed Vmax depending on the preset deceleration rate (a) and limiting the tape running speed with the maximum speed Vmax.

Tape running apparatus

On the occasion of stopping the tape running at a high speed, a winding radius of the tape supply reel is detected to set the tape deceleration rate (a) on the basis of the detected winding radius of the supply reel. After the tape running speed is decelerated up to the allowable speed VL in the predetermined deceleration rate (a), the tape is stopped by effectuating the brake. Thereby, the tape can be driven at the speed higher than the allowable speed VL without generating any damage, enabling reduction of time required for the fast-forward/rewind operation. This can improve application flexibility by providing a couple of tape running modes at the first high speed V1 which is higher than the allowable speed VL and the second high speed V2 which is lower than the allowable speed VL. In addition, running of the tape can be ceased within the predetermined time t from the input of the stop command signal by specifying the maximum speed Vmax depending on the preset deceleration rate (a) and limiting the tape running speed with the maximum speed Vmax.

Apparatus or method for controlling tape speed

On the occasion of stopping the tape being run at a high speed, a winding radius of the tape supply reel is detected, and a tape deceleration rate is set in response to the detected winding radius. After the tape running speed is decelerated in the deceleration rate up to a preset speed, VL, at which the tape being run can be stopped without damage, the tape is stopped by a brake means. Thereby, the tape can be driven at a higher speed than the speed, VL, without damage, enabling a reduction of time required for a fast forward/rewind operation.

Apparatus for controlling tape speed

A demagnetizing circuit of a home use video tape recorder is controlled by using means such as a control by a microcomputer or the like so as to execute a demagnetizing operation in a desired tape position interval. Further, by properly controlling an onscreen-display on a monitor display screen or a display on a VTR display tube, the operating efficiency is further improved.

Video tape recorder having a special demagnetizing function

A cleaning device for cleaning a rotary magnetic head of a magnetic recording and reproducing device includes a cleaning member which is movable into and out of contact with the rotating magnetic head. The cleaning device is activated through the operation of a manually operable button and under the control of an electronic control device. The cleaning member is automatically brought into contact with the magnetic head to clean the same. The operation of the cleaning device is carried out in association with an operation of a tape loading mechanism of the magnetic recording and reproducing device. The vertical position of the cleaning member is changed when it is contacted with the magnetic head, so that the portion of the cleaning member to be contacted with the magnetic head is changed.

Growing community of inventors

Ibaraki-ken, Japan

Takeo Ohkouchi