JPH04344776A - Magnetic recording image pickup device - Google Patents

Abstract

PURPOSE:To properly perform a variable power operation and adjustment of a focal distance when picking up a moving picture and a still picture by driving smoothly a focus adjustment means when picking up the moving picture and driving the means at a high speed for the still picture. CONSTITUTION:A zoom driver 14 drives a motor 15 according to an output of a telescopic side driver or a wide-angle side driver of a zoom button 11 to drive a lens 1b thereby implementing the variable power. Then the gain is controlled by a control circuit 13 according to the image pickup mode. That is, in the case of the still picture recording (SV), the gain is increased with respect to an output from the zoom button 11 and in the case of the moving picture recording (MV), the gain is decreased with respect to an output from the zoom button 11. Thus, in the case of the SV mode, the motor 15 is driven at a high speed to implement the variable power at a high speed and in the case of the MV mode, the motor 15 is driven smoothly to implement the variable power smoothly.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording and photographing apparatus for recording moving images and still images.

0002

BACKGROUND OF THE INVENTION In recent years, there has been an increasing demand for high-density recording in the field of magnetic recording. For example, in video tape recorders (VTRs), tape running speed has been lowered and magnetic recording has been performed at a higher density. It is becoming. For example, when recording audio signals using a fixed head, if the tape running speed is simply reduced, the relative speed will not be large enough and the playback quality will deteriorate. A method is adopted in which the audio signal is lengthened and the time-axis compressed audio signal is sequentially recorded in the extended portion.

[0003] Rotating 2-head helical scan type V
To give a concrete explanation using TR as an example, the magnetic tape is wound around the rotating cylinder by more than (180+θ) degrees (see FIG. 4), and the video signal recording area portion 5 (FIG. 5)
At 80 degrees, the PCM audio signal recording area portion 6 (FIG. 5) is traced by the rotary heads 3 and 4 at θ of the rotary cylinder 2. In the PCM audio signal recording area portion 6, an audio signal converted into PCM and time-compressed is recorded.

[0004] As an application example of the method of recording a digital signal in a separate area while recording a video signal, it has been proposed to record a still image as a digital signal in a digital signal recording area. Since a still image has a small amount of information, it is possible to record all of the information on the magnetic tape by scanning the PCM audio signal recording area multiple times. According to this method, not only can still images be photographed using the same photographing device and the same recording medium as used for video photography, but also high-quality still images can be obtained. This still image has higher image quality than a still image obtained by stopping the running of the magnetic tape in a VTR and reproducing the video signal of the same track.

[0005]

[Problem to be solved by the invention] Still image shooting involves momentarily fixing the object to be photographed, and in order not to miss a photo opportunity, a high-speed magnification change operation is required, and errors in the focus position can be quickly corrected. It is hoped that this will be achieved without any problems.

On the other hand, in video shooting, the subject to be photographed is continuous in time, and it is desirable that the time taken to reach the target point when adjusting magnification is short; however, if the shooting speed is too high, When viewed as a continuous image, it may feel strange if the focal length is exceeded or the action is repeated. Therefore,
If anything, it is desired that the zooming operation be smooth rather than fast.

[0007] Since the nature of the required magnification changing operation is different as described above, if the same magnification changing operation is performed when photographing a still image and when photographing a moving image, the focal length cannot be properly adjusted.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic recording and photographing device that can solve the above-mentioned problems and can appropriately adjust the magnification change and focal length during video and still image photography. There is a particular thing.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an image sensor, a conversion means for converting a video signal from the image sensor into a standard television signal, and a conversion means for converting a video signal from the image sensor into a standard television signal. a video signal processing means that processes the standard television signal converted by the converting means to convert it into a video signal; a still image signal processing means that processes the standard television signal converted by the converting means to convert it into a still image signal; A still image signal from the still image signal processing means is recorded in a still image recording area of a video track formed diagonally with respect to the longitudinal direction of the magnetic tape, and a moving image signal from the moving image signal processing means is recorded as a moving image on the video track. A magnetic recording and photographing device having a recording means for recording in a recording area, a focal length adjusting means for adjusting a focal length, and a drive for driving the focal length adjusting means smoothly when shooting a video and at high speed when shooting a still image. It is characterized by comprising a control means.

0010

[Operation] In the present invention, the focal length adjusting means for adjusting the focal length is smoothly driven by the drive control means during video shooting,
It is driven at high speed by the drive control means during still image shooting.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a photographing lens system, which includes a focusing lens 1a for adjusting the focus, and a zoom lens 1b for performing a magnification change operation. Reference numeral 2 denotes an aperture (iris) that controls the amount of light incident on the photographic lens system 1. 3 is a solid-state imaging device that photoelectrically converts a subject image formed on an imaging surface into an imaging signal. A sample and hold circuit (S/H) 4 samples and holds the signal from the solid-state image sensor 3. A camera signal processing circuit 5 converts the signal from the S/H 4 into a predetermined television signal.

A video signal processing circuit 6 processes the video signal from the camera signal processing circuit 5. 7 is an A/D conversion circuit that converts the signal from the camera signal processing circuit 5 into A/D. 8 is a rate conversion circuit, A
This converts the digital signal from the /D conversion circuit 7 in order to distribute it to a plurality of tracks in the PCM area. Reference numeral 9 denotes a PCM conversion circuit, which converts the signal from the rate conversion circuit 8 into PCM. Reference numeral 10 denotes a recording circuit for recording the video signal from the video signal processing circuit 6 and the still image signal from the PCM conversion circuit 9.

11 is a zoom button, and the telephoto side drive (T)
or wide side drive (W). Reference numeral 12 denotes an SV/MV mode changeover switch for switching to either still image recording mode (SV mode) or moving image recording mode (MV mode). A motor 15 drives the zoom lens 1b. A zoom driver 14 drives the motor 15. 13 is a control circuit which, in the SV mode, controls the motor 15 to be driven at high speed via the zoom driver 14 in response to switching of the zoom button 11;
mode, the motor 1 is connected via the zoom driver 14.
5 to smoothly drive and control the motor.

Next, the operation will be explained.

When the control circuit 13 detects whether the imaging mode is SV mode or MV mode,
According to the detected shooting mode, the recording circuit 10 records still images in the still image recording area of the video track, and records moving images in the moving image recording area of the video track. Further, according to the output of the telephoto side drive or wide side drive of the zoom button 11, the motor 15 is driven by the zoom driver 14, the lens 1b is driven, and a zooming operation is performed. Further, the gain is controlled by the control circuit 13 according to the shooting mode. That is, in the case of SV mode, the gain is increased with respect to the output of the zoom button, and in the case of MV mode, the gain is decreased with respect to the output of the zoom button. Therefore, in the SV mode, the motor 15 is driven at a high speed and the magnification change operation is performed at a high speed, and in the MV mode, the motor 15 is driven smoothly and the magnification change operation is performed smoothly.

FIG. 2 shows another embodiment of the invention. This is an example in which an SV release button 21 is newly provided.

FIG. 3 is a flowchart showing the control procedure by the control circuit 22.

When the release button 21 is pressed halfway in step S11, the process moves to step S12, and step S
In step 12, the magnification change operation is made for still image photography. Next, in step S13, when the release button 21 is fully pressed, a still image is recorded in step S14.

[0021] The SV release button 22 is released,
When the still image shooting mode is detected by the control circuit 22,
The control circuit 22 performs the zooming operation at high speed during release.

[0022]

[Effects of the Invention] As explained above, according to the present invention,
With the above configuration, there is an effect that the magnification change operation and focal length adjustment can be performed appropriately during moving image shooting and still image shooting.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram showing another embodiment of the invention.

FIG. 3 is a flowchart showing a control procedure by a control circuit 22 in another embodiment.

[Figure 4] V for recording and reproducing video signals and audio signals
FIG. 3 is a diagram showing a magnetic tape running system of a TR.

5 is a diagram showing an example of a recording trajectory on a magnetic tape by the heads 3 and 4 shown in FIG. 4; FIG.

[Explanation of symbols]

1 Imaging lens system 2 Aperture 3 Solid-state imaging device 4 Sample hold circuit 5 Camera signal processing circuit 6 Video signal processing circuit 7 A/D conversion circuit 8 Rate conversion circuit 9 PCM conversion circuit 10 Recording circuit 11 Zoom button 12 SV/MV mode switching Switch 13 Control circuit 14 Zoom driver 15 Motor

Claims (1)

[Claims] 1. An image sensor, a converter for converting a video signal from the image sensor into a standard television signal, and a video signal that processes the standard television signal converted by the converter to convert it into a video signal. processing means; still image signal processing means for processing the standard television signal converted by the converting means into a still image signal; and converting the still image signal from the still image signal processing means into a longitudinal direction of a magnetic tape. In a magnetic recording and photographing device, the magnetic recording and photographing device has recording means for recording a still image in a still image recording area of a video track formed diagonally with respect to the still image recording area of the video track, and recording a moving image signal from the moving image signal processing means in the moving image recording area of the video track. 1. A magnetic recording and photographing apparatus comprising: a focal length adjusting means for adjusting a distance; and a drive control means for driving the focal length adjusting means smoothly when photographing a moving image and at high speed when photographing a still image.