JPH0556377A - Recorder and reproducer - Google Patents

Abstract

PURPOSE:To make it possible to take the interchangeability of an inline head device and a track number display. CONSTITUTION:In a frame record, a system control circuit 42 displays the track number of a track faced by a magnetic head 30 on a display device 44 at the time of recording a first field. At the time of recording a second field, the track number display of the display device 44 is not updated. In a frame reproduction, the first and second fields are reproduced and are temporarily stored in a memory 18 and afterwards, they are alternately read by a field cycle repeatingly. At the time of reproducing the first field, the track number in which the first field was recorded is displayed on the display device 44. At the time of reproducing the second field, the track number display on the display device 44 is not updated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a still image recording apparatus and reproducing apparatus.

[0002]

As a still image recording medium, there is a still video floppy used in a still video camera (or an electronic still camera). This still video
The recording format of the floppy disk is specified by the still video conference, and one field of video signal is recorded per track.

In still video floppies, recording formats of voice and data are specified in addition to still images. For still images, field recording for recording field signals and frame recording for recording frame signals are performed. In frame recording, it is specified that the first field is recorded on the outer track of two adjacent tracks and the second field is recorded on the inner track.

As an electromagnetic conversion means for recording or reproducing a video signal on two adjacent tracks, a single magnetic head (field head) is used or two magnetic heads are used for one track. -It may consist of an in-line head (or frame head) that is integrated with a pitch apart. In the case of the field head, an image memory for storing the reproduced video signal of at least one field is required.

Although it usually takes about 100 ms to move the magnetic head to the adjacent track, this in-line head has an advantage that the track can be virtually instantaneously moved by electrical switching.

Such a still video floppy recording / reproducing apparatus, for example, an electronic still camera usually has a display means for displaying the track number where the magnetic head is located. In the case of an in-line head, the track number on the outer peripheral side of the two facing tracks is displayed during frame recording or reproduction.

On the other hand, in the case of a single magnetic head (field head), the track number of the track which the magnetic head faces is displayed regardless of whether it is frame recording (or reproducing) or field recording (or reproducing). For example, in the case of frame reproduction, after reproducing the video signal of the first field and storing it in the image memory, the magnetic head is moved to the inner track where the second field is recorded and the second field is reproduced. Frame reproduction is realized by repeating the reading of the video signal of the first field from the image memory and the reproduction output of the video signal of the second field from the inner track in the field cycle. Therefore, when the frame is reproduced by the field head, it is the inner track number that is displayed longer.

[0008]

As described above, the track number displayed when frame recording (or reproducing) is different between the device using the inline head and the device using the field head. This only causes unnecessary confusion for the user.

It is an object of the present invention to provide a recording device and a reproducing device which solve such inconvenience.

[0010]

A recording apparatus according to the present invention has a single head for recording a signal on a recording medium and a display means for displaying a recording position of the recording medium, and the display means is a frame. When recording the second field of the record, the first
The recording position of the field is displayed.

A reproducing apparatus according to the present invention has a single head for reproducing a signal from a recording medium, a memory means having a storage capacity of at least one field, and a display means for displaying a recording position of the recording medium. The display means displays the recording position of the first field even when the single head faces the recording position of the second field in frame reproduction.

[0012]

With the above means, the display of the recording position becomes the same as that of the recording device and the reproducing device having the in-line head, and unnecessary anxiety and misunderstanding can be avoided.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. Reference numeral 10 is a photographic lens, 12 is an image pickup element, 14 is an image pickup processing circuit which performs gamma correction on a signal from the image pickup element 12 and outputs a video signal of a predetermined format, 16 is an A / D converter which converts an analog signal into a digital signal , 18 is a memory having a storage capacity of at least one frame,
Reference numeral 20 is a memory control circuit for controlling writing and reading of the memory 18, 22 is a D / A converter for converting a digital signal read from the memory 18 into an analog signal, 2
4 is a recording processing circuit for recording the output signal of the D / A converter 22 by FM modulation or the like, 26 is a recording amplifier for amplifying the output of the recording processing circuit 24, 28 is connected to a contact at the time of recording, and b at the time of reproduction. A switch connected to the contact point, 30 is a magnetic head for recording and reproduction, 32 is a magnetic disk called a still video floppy, and 33 is a head feeding device for feeding the magnetic head 30 in the radial direction of the magnetic disk 32.

Reference numeral 34 is a reproduction amplifier for amplifying the reproduction output of the magnetic head 30, and 36 is a reproduction processing circuit for reproducing the output of the reproduction amplifier 34 by FM demodulation or the like. The output of the reproduction processing circuit 36 is applied to the A / D converter 16, digitized and stored in the memory 18. 38 is a video encoder for converting the output of the D / A converter 22 into a standard television signal, for example, an NTSC television signal, 4
Reference numeral 0 is an output terminal for connecting the output of the video encoder 38 to an external monitor device or the like.

Reference numeral 42 is a system control circuit for controlling the entire system,
A display device 44 displays a track number and the like. 46
Is a switch for selectively applying the output of the image pickup processing circuit 14 or the reproduction processing circuit 36 to the A / D converter 16. Under the control of the system control circuit 42, the switch 46 is connected to the a contact during recording and is connected to the b contact during reproduction.

The overall operation of FIG. 1 will be described. When the magnetic disk 30 is loaded, the system control circuit 42 checks the recording status of all tracks on the magnetic disk 30 and searches for unrecorded tracks. Since this operation is irrelevant to the present invention, detailed description will be omitted. In the following description of the recording operation, for simplicity, it is assumed that recording is performed on the unrecorded magnetic disk 32.

In the case of frame recording, a release
In response to the button operation, the system control circuit 42 applies a trigger signal to the image sensor 12. In response to this, the image sensor 12 converts the subject image formed by the photographing lens into an electric signal of one frame (that is, two fields). The generated electric signal is read from the image pickup device 12 for each field, and is gamma-corrected and converted into a video signal by the image pickup processing circuit 14. The output of the image pickup processing circuit 14 is applied to the A / D converter 16 via the switch 46 and digitized.
The memory control circuit 20 writes the output of the A / D converter 16 in the memory 18. In this way, in the memory 18,
Digital video signals of the first and second fields are stored.

The first field portion of the video signal stored in the memory 18 is first read and applied to the D / A converter 22 via the memory control circuit 20. D / A converter 22
Converts a digital video signal into an analog video signal.
The recording processing circuit 24 records the output of the D / A converter 22, and the output is applied to the magnetic head 30 via the switch 28 and recorded on the magnetic disk 32.

After recording the first field, the head feeding device 33 moves the magnetic head 30 one track toward the inner circumference side. After this track feed, the video signal of the second field is read from the memory 18. The read signal is
Similar to the first field, the memory control circuit 20, D / A
It is applied to the magnetic head 30 via the converter 22, the recording processing circuit 24 and the switch 28, and is recorded on the magnetic disk 32.

After the recording of the second field, the system control circuit 42 moves the magnetic head 30 to the unrecorded track on the inner peripheral side by the head feeding device 33 in preparation for the next recording.

The operation of frame reproduction will be described. The head feeding device 33 positions the magnetic head 30 on the outer track of two adjacent tracks of frame recording, and reproduces the recording signal of that track. Magnetic head 3
The output of 0 is applied to the reproduction amplifier 34 via the switch 28 and amplified. The reproduction processing circuit 36 is a reproduction amplifier 36.
Process the output of. The reproduction video signal output from the reproduction processing circuit 36 is transmitted via the switch 46 to the A / D converter 16
Applied to. The A / D converter 16 digitizes the reproduced video signal, and its output is written in the memory 18 via the memory control circuit 20.

The reproduced video signal of the first field is the memory 1
8 is written, the system control circuit 42 causes the head feeding device 33 to move the magnetic head 30 to the inner circumferential side by one track. The magnetic head 30 reads the recording signal of the second field recorded on the track on the inner circumference side, and the output thereof is the same as in the case of the first field.
Stored in. In this way, the first field and the second field
The reproduced video signal of the field is stored in the memory 18.

The reproduced video signals of the first field and the second field stored in the memory 18 are read out alternately and repeatedly in the field cycle and applied to the D / A converter 22 via the memory control circuit 20. The D / A converter 22 converts a digital signal into an analog signal. Video encoder 38 converts the output of D / A converter 22 into standard television format. The output of the video encoder 38 is
It is supplied to an external monitor or the like connected to the output terminal 40. Thereby, the reproduced image can be observed.

Next, the operation for displaying the track number will be described in detail with reference to the flow charts shown in FIGS. FIG. 2 shows a flow chart at the time of frame recording,
FIG. 3 shows a flowchart for frame reproduction.

First, the track number display operation during frame recording will be described with reference to FIG. First, the whole is initialized (S1). It also includes inspection of the recording status of the loaded magnetic disk. After that, the track number of the track facing the magnetic head 30 is displayed on the display device 44 (S2), and the release button (not shown) is turned on (S3). Although not shown, there is a track feed switch for changing the track position of the magnetic head 30, and the user can move the magnetic head to any track on the inner circumference side or the outer circumference side by this track feed switch. ..

When the release button is turned on (S
3) Exposure of the image sensor 12, that is, photoelectric conversion is performed (S
4) As described above, the signals of the first field and the second field are sequentially stored in the memory 18 (S5, 6).
Then, the signal of the first field is read from the memory 18 and recorded on the magnetic disk 32 (S7). The magnetic head 30 is moved to the inner circumference side by one track (S8), the signal of the second field is read from the memory and recorded on the magnetic disk 32 (S9).

The magnetic head 30 is moved to the inner circumference side by one track (S10), the track number display of the display device 44 is updated (S2), and the next operation of the release button is waited (S).
3).

As described above, in this embodiment, in the case of frame recording, the track number for recording the second field is not displayed. This is the same display mode as when the frame recording is performed by the recording device of the in-line head, and it is possible to avoid unnecessary anxiety and misunderstanding.

Next, with reference to FIG. 3, the track number display operation during frame reproduction will be described. Initialize (S1
1) The track number of the track facing the magnetic head 30 is displayed on the display device 44 (S12). The recorded signal of the first field is reproduced, and the reproduced video signal is reproduced in the memory 18
(S13). The magnetic head 30 is moved to the inner circumference side by one track (S14), the recording signal of the second field is reproduced, and the reproduced video signal is stored in the memory 18 (S15).

The reproduced video signals of the first field and the second field are read alternately from the memory 18 in the field cycle, and the television signal of the reproduced image is output from the output terminal 40 (S16).

In response to a track movement command from a track feed switch (not shown) (S17), the head feed device 3
3 moves the magnetic head 30 to another track (S1
8) Display the track number of the destination track (S
12).

As described above, in this embodiment, in the case of frame reproduction, the track number of the track for recording the second field is not displayed. This is the same display mode as when a frame is reproduced by the reproducing device of the in-line head, and it is possible to avoid unnecessary anxiety and misunderstanding.

[0034]

As can be easily understood from the above description, according to the present invention, the same track number is displayed as in the case of the recording / reproducing apparatus adopting the in-line head, and unnecessary anxiety and misunderstanding can be avoided. it can.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of an embodiment of the present invention.

FIG. 2 is an operation flowchart of frame recording.

FIG. 3 is an operation flowchart of frame reproduction.

[Explanation of symbols]

10: Photographic lens 12: Image sensor 14: Image processing circuit 16: A / D converter 18: Memory 20: Memory control circuit 22: D / A converter 24: Recording processing circuit 26: Recording amplifier 28:
Switch 30: Magnetic head 32: Magnetic disk 3
3: Head feeding device 34: Reproduction amplifier 36: Reproduction processing circuit 38: Video encoder 40: Output terminal
42: System control circuit 44: Display device 46: Switch

Claims (2)

[Claims] 1. A single head for recording a signal on a recording medium, and a display means for displaying a recording position of the recording medium,
A recording apparatus, wherein the display means displays the recording position of the first field when recording the second field of frame recording. 2. A single head for reproducing a signal from a recording medium, a memory means having a storage capacity of at least one field, and a display means for displaying a recording position of the recording medium, the display means comprising: In frame reproduction, the reproducing device is characterized in that the recording position of the first field is displayed even when the single head faces the recording position of the second field.