JPH0722358B2 - Image information recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention records a moving image information signal corresponding to a subject image in a recording medium, and also records a still image information signal corresponding to a still image of an arbitrary subject image. The present invention relates to an image information recording device capable of recording on the recording medium.

[Conventional technology]

For example, in a conventional VTR device with a built-in camera, a function for recording a still image is not particularly added. When it is necessary to reproduce a still image, the still mode is set and the moving image recorded on the tape is recorded. A still image is reproduced by repeatedly reproducing an image signal for one field or one frame from the signal.

[Problems to be solved by the invention]

However, in the recording tape obtained by the conventional camera-integrated VTR device, when one field or one frame of signal is extracted from the moving image signal and reproduced as a still image signal, the image is a moving image. Even if the image quality was sufficient for viewing if reproduced as an image signal, the visual S / N deteriorated due to the still image, and only a low quality image was obtained. In addition, conventional camera integrated type
Since the VTR device does not have a shutter function, even the fastest exposure time is 1/60 second, so a fast-moving subject is recorded with blurring, and a strobe cannot be used.

Therefore, it has been considered to record a still image separately from recording a moving image. In this case, when recording a still image signal, it is considered to prevent the deterioration of image quality by digitizing the still image signal.

For example, although the VTR device with a built-in camera has been miniaturized recently, a so-called 8 mm video device has been developed.
It is considered that a still image signal is recorded in the PCM recording area of the magnetic tape specified in the 8 mm video format to record a still image and a moving image at the same time.

However, when recording a still image and a moving image at the same time as described above in a camera-integrated VTR device, a still image signal and a moving image signal are obtained by the same image sensor, so that the image pickup for still image recording is performed. Since imaging for recording a moving image is not performed during the period, a phenomenon (blackout) in which a moving image signal cannot be obtained during the period occurs, which causes inconvenience when recording a moving image.

The present invention has been made in view of such a problem, and a blackout phenomenon that a moving image information signal is not recorded in the recording medium occurs during a period in which the still image information signal is recorded in the recording medium. Another object is to provide an image information recording device capable of recording a moving image information signal and a still image information signal corresponding to a subject image on a recording medium.

[Means for Solving Problems] An image information recording apparatus of the present invention has an image forming unit for forming a subject image, and image information corresponding to the subject image formed on the image forming unit. An image pickup unit for generating a signal, a shutter mechanism for exposing and blocking an image forming unit in the image pickup unit, and an image information signal generated by the image pickup unit for storing one screen unit. Storage means, a still image recording instruction means for instructing to start recording operation of a still image information signal corresponding to a still image of a subject image, and the still image recording instruction means for instructing to start recording operation of a still image information signal. If not, the image forming unit in the image pickup unit is exposed by the shutter mechanism to record the image information signal continuously generated from the image pickup unit on the recording medium as a moving image information signal, When the recording operation of the still image information signal is instructed by the still image recording instruction means, the image for one screen stored in the storage means prior to the instruction to start the recording operation of the still image information signal. The information signal is continuously read, the read image information signal is recorded as a moving image information signal on the recording medium, and the shutter mechanism shields the image forming unit in the image pickup unit, thereby allowing the image pickup unit to move from the image pickup unit. The recording means records the generated image information signal for one screen as a still image information signal in an area different from the area in which the moving image information signal is recorded on the recording medium.

[Work]

With the above configuration, a moving image information signal corresponding to a subject image without a blackout phenomenon such that the moving image information signal is not recorded in the recording medium during a period in which the still image information signal is recorded in the recording medium. And the still image information signal can be recorded on the recording medium.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram of a camera-integrated VTR device as an embodiment of the present invention.

In FIG. 1, 1 is a lens, and 3 is a Charge Coupled Device (hereinafter referred to as CCD) as an image pickup element arranged at the focal point of the lens 1. Reference numeral 2 is a shutter arranged between the lens 1 and the CCD 3. The shutter speed of the shutter 2 is set by a photometric device (not shown), and the set value is input to a system controller described later.

Reference numeral 18 denotes a system controller, which is a read only memory (hereinafter referred to as RO) that stores a control procedure as shown in FIG. 2 described later.
M)). Reference numeral 17 denotes a synchronization signal generator (hereinafter referred to as SSG), which supplies signals necessary for controlling a CCD driver 19, a picture memory driver 20, a mechanical control 21 and the like, which will be described later, to the system controller 18. CCD driver 19
Based on the scan pulse from the system controller 18,
Drive CCD3. The system controller 18 also controls the compensator 5 based on shutter speed information obtained from the shutter 2 and an exposure system (not shown).

An analog signal processing circuit 4 converts the three primary color signals RGB from the CCD 3 into a luminance signal Y and a color signal C, and outputs the output luminance signal Y and color signal C to one input end of the compensator 5. To do.

9 is an analog / digital (A / D) converter, which is a CCD3
From the three primary color signals RGB to the digital three primary color signals RGB '.

A picture memory 10 stores the three primary color signals RGB ′ converted into digital signals by the A / D converter 9 in units of frame periods or field periods.

The picture memory driver 20 drives the picture memory 10 based on a control signal from the system controller 18. Digital primary color signal RG from picture memory 10
One of B ′ is input to the digital / analog (D / A) converter 11, and the other is input to the pulse code modulation (PCM) encoder 13. The three primary color signals RGB converted into analog signals by the D / A converter 11 are input into the analog signal processing circuit 12, converted into luminance signals Y and color signals C, and input into the other input end of the compensator 5. To be done.

6 is a luminance signal Y from the output end of the compensator 5.
Is an FM modulation circuit for performing FM modulation so as to be suitable for recording. Reference numeral 5 is a low frequency conversion circuit for converting the color signal C from the output end of the compensator 5 into a low frequency suitable for recording. PCM encoder 13 is picture memory 1
The digital three-primary-color signal RGB 'from 0 is encoded so as to be suitable for recording on the magnetic tape 22 as a recording medium.

A microphone 14 picks up a voice signal. 15
Is a processing circuit for amplifying the signal from the microphone 14,
Reference numeral 16 is an FM modulation circuit for performing FM modulation on the signal from the processing circuit 15.

Reference numeral 23 is a rotary magnetic head, and 8 is a recording formatting circuit, which inputs the luminance signal from the FM modulation circuit 6 and the color signal from the low frequency conversion circuit 7 as a moving image signal, and stops the PCM signal from the PCM encoder 13. The signal is input as an image signal, and further the audio signal from the FM modulation circuit 16 is input to format these signals suitable for recording them on the magnetic tape 22. For example, in the case of supporting the so-called 8 mm video standard, the moving image signal and the audio signal are frequency-multiplexed and the magnetic tape is rotated by the rotary magnetic head 23.
22 is recorded on the video + FM audio track, and the still image signal is recorded on the magnetic tape 22 by the rotating magnetic head 23 as an extension of the video + FM audio track (PC
Recording on the M audio track) The traveling of the magnetic tape 22 is controlled by the mechanical control 21.

Reference numeral 24 is a shutter release button having a two-step stroke which is sequentially turned on when it is pressed, and ON / OFF signals of the first stroke and the second stroke are input to the system controller 18. System controller
Reference numeral 18 opens the shutter 2 by starting the first stroke of the shutter release button 24 to start moving image shooting. That is, when the shutter release button 24 is turned on for the first stroke, the CCD 3 is driven by the CCD driver 19 to pick up an image of a subject, and the image pickup signal is input to the analog signal processing circuit 4 and the A / D converter 9. The luminance signal Y and the color signal C are output from the analog signal processing circuit 4 to one input terminal of the compensator 5, and the A / D converter 9
The image pickup signal input to is then A / D converted, temporarily stored in the picture memo 10, taken out of the memory 10 with a delay of one screen period, converted into an analog signal by the D / A converter 11, and converted into an analog signal. The signal processing circuit 12 converts the luminance signal Y and the color signal C and supplies the luminance signal Y and the color signal C to the other input terminal of the compensator 5. Therefore, the brightness and color signals of the current screen and the previous screen are supplied to both inputs of the compensator 5, and when the shutter release button 24 is turned on for the first stroke, the signal of the current screen from the compensator 5, that is, the analog signal. The luminance signal and the chrominance signal from the signal processing circuit 4 are supplied to the FM modulation circuit 5 and the low frequency conversion circuit 7, and the output signals from both circuits 6 and 7 are input to the recording formatting circuit 8, and by the same circuit 8, Magnetic tape 22
Is recorded in the moving image recording area.

In addition, the system controller 18 uses one screen period (for example, 1 screen period).
The picture memory driver 20 is controlled so that the image pickup signal from the A / D converter 9 is stored in the picture memory 10 in one frame or one field period.

Then, by pressing the shutter release button 24 to the second stroke, still image recording is performed. That is, the system controller 18 exposes the CCD 3 by temporarily closing the shutter 2 and then opening the shutter 2 for a predetermined time by turning on the second stroke of the button 24. After this exposure is completed, the three primary color signals RGB read from the CCD 3 are temporarily stored in the picture memory 10 via the A / D converter 9, and the picture memory driver 20 records the moving picture recording time from the picture memory 10. The data is read over a longer period of time, encoded into a predetermined code format by the PCM encoder 13, and recorded on the extension track of the magnetic tape 22 by the recording formatting circuit 8.

The shutter speed (the opening time of shutter 2) is 1 /
When it is faster than 30 seconds (one frame period), there is no problem in forming a moving image signal, so the signal taken out from the CCD 3 through the analog signal processing circuit 4 and the compensator 5 is recorded on the magnetic tape 22 as a moving image signal. To do.

When the shutter release time of the second stroke of the shutter release button 24 is longer than 1/30 second, that is, when the shutter speed is slow, the system controller 18 controls the compensator 5 while the shutter 2 is open. Then, a signal, that is, a signal corresponding to the screen immediately before the shutter 2 is opened, is taken out from the picture memory 10 via the D / A converter 11, the analog signal processing circuit 12 and the compensator 5, and a moving image signal is obtained. In the recording area of. By doing so, the following inconveniences are eliminated. That is, the shutter speed
If it is longer than 1/30 second, the signal cannot be read out from the CCD3 during the exposure, and so-called blackout will occur at the time of moving image reproduction if no measures are taken. Therefore, as described above, when the shutter speed is longer than 1/30 second, the image pickup signal stored in the picture memory 10 is taken out at the synchronization timing of the normal moving image signal during the exposure, and the recording image is recorded. By forming a signal and recording it, a moving image without blackout can be reproduced.

Next, the main operation of the system controller 18 will be described with reference to the flowchart shown in FIG.

First, in step S1, the shutter release button
It is determined whether the first stroke of 24 is "on". If it is on, the process proceeds to step S2 to record a moving image signal. Then, in step S3, the shutter release button 24
It is determined whether the first stroke of is off, and if it is off, the process proceeds to step S4 to end the recording of the moving image signal
Return to S1. On the other hand, if it is not off, the process proceeds to step S5 to determine whether the second stroke of the shutter release button 24 is on. If it is not on, the process returns to step S2, and if it is on, the process proceeds to step S6 to set the shunter. Judge whether the speed is slower than 1/30 second, and if not slow, step S8
If it is late, the process proceeds to step S7 if it is slow, and the compensator 5 is switched to the input end side for inputting the signal from the picture memory 10, and the process proceeds to step S8.

In step S8, the shutter 2 is operated at the set speed to expose the CCD 3, and the process proceeds to step S9. The shutter 5
Image information stored in CCD3 by the operation of
Is read out to the picture memory 10 at the first transfer timing immediately after it is closed due to the end of the operation, and is read out from the picture Mary 10 to the PCM encoder 13 over a predetermined time to record a still image. In step S9, the moving image recording is continued until the still image recording is completed. Therefore, even if the shutter release button 24 is turned off up to the first stroke during this time, moving images and still images are recorded. Then, in step S10, it is determined whether the first stroke is off. If it is off, the process proceeds to step S11 to end the moving image recording.

As described above, before recording a still image, the magnetic tape 22 is always loaded to record a moving image.

Further, while the still image signal is being recorded in the PCM area of the tape 22 from the picture memory 10 through the PCM encoder 13, even if the shutter release button 24 is accidentally returned to the first stroke, 22 is automatically sent and both moving images and still images are recorded at the same time. Therefore, the moving image signal is always recorded at the same time before and after the still image signal, which is advantageous for still image retrieval during reproduction. In addition,
During playback, a so-called high-speed picture search can be performed on a moving image to easily search for a still image. For example, if you send a 30-minute tape at 10 times speed, you can see everything in 3 minutes. If one still image is recorded for 30 seconds of moving image, 60 still images can be recorded on the tape for 30 minutes, and it is searched in 3 minutes, which is a great practical effect. .

In the above description of the embodiment, the operation of the shutter 2 is two strokes, but it goes without saying that separate shutters may be provided for moving images and still images. At that time, until the shutter for still images can operate,
That is, it is more convenient to use some kind of display indicating that a still image can be recorded until it is loaded. This is also the case with the two-stroke shutter release button, but more reliable operation can be performed when the shutters are provided separately for moving images and still images.

Further, the image pickup means may be something other than the CCD.

〔The invention's effect〕

As described above in detail, according to the present invention, during the period in which the still image information signal is recorded on the recording medium, the subject does not generate the blackout phenomenon that the moving image information signal is not recorded on the recording medium. An image information recording device capable of recording a moving image information signal and a still image information signal corresponding to an image on a recording medium can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a flow chart showing the operation of the system controller. 1 ... Lens, 2 ... Shutter, 3 ... CCD element, 4 ... Analog signal processing circuit, 5 ... Compensator, 6 ... FM modulator, 7 ... Low frequency conversion circuit, 8 ... Recording formatting Circuit, 9 …… A / D converter, 10 …… Picture memory, 11,12 …… D / A converter, 13 …… PCM encoder, 14 …… Microphone, 15 …… Voice processing circuit, 16 …… FM Modulator, 17 …… Synchronous signal generator, 18 …… Syscon, 19 …… CCD driver, 20 …… Picture memory driver, 21 …… Mechanical control, 22 …… Tape, 23 …… Head, 24 …… switch.

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location 7734-5C H04N 5/91 J

Claims (1)

[Claims] 1. An image forming unit for forming a subject image,
Image pickup means for generating an image information signal corresponding to a subject image formed on the image forming portion, a shutter mechanism for exposing and blocking the image forming portion in the image pickup means, and the image pickup means Storage means for storing the image information signal generated by one screen unit, still image recording instruction means for instructing to start the recording operation of the still image information signal corresponding to the still image of the subject image, and the still image When the recording instruction means has not instructed the start of the recording operation of the still image information signal, the shutter mechanism exposes the image forming portion of the image pickup means to continuously generate image information from the image pickup means. The signal is recorded on a recording medium as a moving image information signal, and when the recording operation of the still image information signal is instructed by the still image recording instruction means, the still image information is recorded. Prior to the instruction to start the recording operation of the report signal, the image information signal for one screen stored in the storage means is continuously read, and the read image information signal is recorded on the recording medium as a moving image information signal. At the same time, by blocking the image forming part of the image pickup means by the shutter mechanism, the image information signal for one screen generated from the image pickup means is used as a still image information signal and the moving image information signal on the recording medium. An image information recording apparatus, comprising: a recording unit that records in an area different from the area in which is recorded.