Sony Corporation

Seiichi Sakai

Hideki Ando

Norihiko Noguchi

Teruyuki Yoshida

Yasuo Iwasaki

Jun Takayama

Fumiyoshi Abe

Mamoru Ueda

Hiroshi Yamauchi

Mikio Kita

Hideaki Kawada

Kozo Kaminaga

Kiyoshi Sawakata

Hiroshi Iino

Kasuo Ike

A field editing system for editing materials in a material collecting place. Data for management of digital video and audio signals and data of an edit list are recorded on a disc-like recording medium together with the digital video and audio signals. Collected materials can be processed on the common disc-like recording medium from image pickup to editing.

Integrated recording and editing apparatus and system

An editing apparatus for editing video signals recorded on an optical disk. The editing apparatus comprises: a video signal reproducing unit for reproducing a first and a second video signal from the optical disk; a video signal merging unit for merging the first and the second video signal to generate a combined video signal for a transition from the first video signal to the second video signal in accordance with a predetermined transition period and a predetermined transition mode; and a video signal recording unit for recording the combined video signal to the optical disk. The combined video signal is recorded to the optical disk only with respect to the transition period.

Editing technique merging video signals recorded on the same optical disk

A magnetic head wear-rate measuring apparatus for measuring the rate of head wear in noncontact form arranged to be opposed to a magnetic head and to serve as a part of oscillating elements of an oscillator circuit. A magnetic resistance of a magnetic circuit at a rotational position where the magnetic head faces the magnetic sensor, changes according to the degree of extension of the magnetic head from the surface of the drum, and the change in magnetic resistance acts as a variation in oscillating frequency. A counter is supplied with a pulse of a measured oscillating frequency and produces a pulse having a pulse width up to the counting of a predetermined number of pulses. The counter output is supplied to a second counter where the number of reference clocks lying within the pulse width is counted and used as measured data.

Noncontact type magnetic hear wear-rate measuring apparatus

Voice over recording can be performed also with an editing apparatus in which an optical disk is used. While an audio signal of narration or the like is recorded onto the inner circumference side of an optical disk, a video signal recorded on the outer circumference side of the optical disk is reproduced in accordance with an editing list. Alternatively, while an audio signal of narration or the like is once edited using a storage device, a video signal is reproduced from the optical disk and outputted directly or through the storage device. Then, the edited audio signal is recorded onto the optical disk.

Editing apparatus and editing method

A magnetic recording and reproducing apparatus in which a magnetic head contacts a recording medium to record or reproduce a signal onto or from the recording medium. The apparatus includes a measurement unit for measuring an abrasion amount of the magnetic head and outputting measurement data. A display unit displays the abrasion amount of the magnetic head represented by the measurement data outputted from the measurement unit.

User initiated magnetic head wear measuring and display system

A magnetic recording and/or reproduction apparatus which is low in load to a CPU for calculating measurement data of a projection amount of a magnetic head and is small in capacity required for a non-volatile memory for storing resulting values of calculation of the CPU includes a measurement instrument for measuring a position and a projection amount of a magnetic head held on a rotary drum, a digital circuit for converting the position and the projection amount into digital data in response to a reference signal generated for each rotation of the rotary drum, a memory for storing initial values of the position and the projection amount, and a CPU for comparing the initial values stored in the memory with the rotational position and the projection amount measured by the measurement instrument. The CPU compares the projection amount measured by the measurement instrument with the projection amount stored in the memory only when the position measured by the measurement instrument and the initial value of the position stored in the memory are equal to each other.

Apparatus for determining magnetic head wear

A magnetic sensor is disposed in an opposing relationship to a rotating magnetic head device with a magnetic head mounted thereon and placed in noncontact therewith so as to fall outside a lap angle .alpha. of a magnetic tape. The magnetic sensor is used as a part of oscillating elements of an oscillator circuit. By noting that a magnetic resistance of a magnetic circuit at a rotational position where the magnetic head faces the magnetic sensor changes according to the degree of extension of the magnetic head from the surface of a drum, and taking the change in magnetic resistance as a variation in oscillating frequency, the rate of wear of the magnetic head is measured. Since the change in magnetic resistance is taken as the variation in oscillating frequency, the degree of extension of the magnetic head, i.e., the rate of wear of the magnetic head can be measured with high accuracy. Since an apparatus for measuring the rate of wear of the magnetic head is a noncontact type, there is no risk that the magnetic head to be measured will be damaged. Owing to the above construction, the rate of wear of the magnetic head can be measured in the noncontact state and with high accuracy.

Noncontact type magnetic head for detecting rate-of-wear in a rotating

The object of the present invention is to rotate a head with high precision along a predetermined rotation locus in a rotary drum apparatus for recording and/or reproducing predetermined signals on a tape recording medium. A locus of the head on the rotary drum connected to the first rotary shaft can be adjusted to coincide with the predetermined locus by dividing the rotary shaft into two shafts, and adjusting the two shafts with an adjustment mechanism. The adjustment mechanism can be in the form of threaded screws or electrical actuators. Sensors can be provided for measuring the horizontal degree and vertical degree of the rotary shaft holding material supporting the first rotary shaft for adjusting the two shafts using electrical actuators based on the measured results.

Rotary drum apparatus with head rotation locus adjustment arrangement

When a magnetic track is formed, the magnetic track is divided into a plurality of track areas in its longitudinal direction. Information signals are recorded in the divided track areas independently of each other. At a portion of the magnetic track, there is provided a reference track area in which a specific reference signal is recorded. When an information signal is recorded in either of the track areas, the reference signal is played back from the reference track area, and the information signal is recorded in the track area corresponding to the information signal using the played back reference signal as a reference for timing of the recording. With the described arrangement, when a plurality of information signals are recorded in a plurality of track areas, which are formed by dividing a track in its longitudinal direction, independently of each other, a signal recorded in a track area is prevented from adversely affecting another signal recorded in a neighboring track area.

Apparatus for recording an information signal in a normal record mode

A magnetic tape recording apparatus having an ordinary recording mode and an editing mode in which an information signal is recorded additionally to information already stored in previously formed oblique tracks is provided in which a high degree of accuracy is assured for tracking servoing upon editing by forming on the tape a track area for tracking in an area at a predetermined position of every other one of the oblique tracks. After the recording apparatus forms a tracking area in a particular oblique track, the recording apparatus prevents its rotary head apparatus from forming another tracking area in an adjacent oblique track.

Information signal recording apparatus for recording tracking signals in

The present invention enables, in assembling a rotary magnetic head drum assembly including a rotary magnetic head drum and a drum base, the automatic, electrical connection of the signal lines of the rotary magnetic head drum to external amplifiers. In the magnetic head drum assembly, lands (15) connected to the signal lines of a rotary magnetic head drum (1) are brought into contact respectively with the upper ends of the spring pins (20a) of a plurality of spring pin connectors (20) mounted on a connector base plate (18) attached to a drum base (11) supporting a stationary magnetic head drum (3), with the spring pins (20a) extending upward, and connected to external amplifiers, when the assembly of the rotary magnetic head drum (1) and the stationary magnetic head drum (3) is mounted on the drum base (11).

Rotary magnetic head drum assembly

A magnetic recording/reproducing device for recording/reproducing information signals for one recording unit over a plurality of recording tracks by helically scanning a magnetic tape with rotary heads. The information signals for one recording unit are recorded on the plurality of recording tracks on the magnetic tape, and guard bands are formed simultaneously between the one recording units. The recording density is substantially improved. Erase heads overwrite the information signals on the magnetic tape and the plurality of recording tracks for one recording unit on the magnetic tape are erased en block, which prevents over-erasing unerased portions during editing.

Magnetic recording/reproducing device

In a signal recording apparatus, a signal recording track and a tracking error detection track are formed in the predetermined positions of a recording track in ordinary recording. In editing and recording, an editing recording track is formed on the basis of the tracking error detection track, thereby it is possible to restrict a deviation of tracking to a predetermined amount even when editing work is repeated in a case where tracking deviation occurs at a start of editing work.

Signal recording and editing apparatus

In a recording and reproducing apparatus according to the present invention, a drum unit incorporates a first recording/reproducing control head. A second recording/reproducing control head is disposed within a running path of a magnetic tape. A control signal synchronizing with a record starting point of recording tracks is recorded by the first or second recording/reproducing control head. The second recording/reproducing control head is controlled in accordance with a state where the control signal is recorded or reproduced by the first recording/reproducing control head, thus recording or reproducing the control signal. A deviation in tracking which is caused due to stretching/contraction of the magnetic tape can be effectively avoided. The control signals can be recorded or reproduced more surely than in the prior art.

Growing community of inventors

Tokyo, Japan

Seiichi Sakai