JPH0554533A - Recording and reproducing device - Google Patents

Abstract

(57) [Summary] [Purpose] When the track to be recorded has already been recorded, enable recording after erasing. [Structure] When the track to be recorded has already been recorded and it is desired to erase it, an erase standby switch 91
push. After storing the connection state of the switch 60, the sub memory 78 restores the switch 60 to the original state by executing erase or canceling erase standby.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for recording / reproducing still images on a recording medium.

[0002]

2. Description of the Related Art As a still picture recording medium, there is a magnetic disk called a still video floppy. The recording format of the still video floppy disk is specified by the still video conference, and one field of video signal is recorded in one track, and one floppy disk has 50 tracks as standard.

A conventional recording / reproducing apparatus for a still video floppy disk is a forward switch for sending the magnetic head to the track in the inner peripheral direction, a reverse switch for sending the magnetic head in the outer peripheral direction, a mode for selecting a reproducing mode and a recording mode. Switch, erase standby switch for selecting erase mode, erase switch for instructing erase execution, recording standby switch for instructing recording preparation (for example, photometry for exposure of image sensor, color measurement, focus adjustment, etc.), recording A recording switch for instructing execution is provided.

In the conventional recording / reproducing apparatus, the power is turned on,
In addition, when the magnetic disk is loaded, the playback mode is set, and the playback video signal is output from the output terminal. When the recording standby switch is turned on and the recording switch is turned on, the input video signal (or the image captured by the image sensor) is recorded on the magnetic disk. If the track to be recorded has already been recorded, Recording can be executed only after the recording on the track is erased or the magnetic head is moved to another unrecorded track by the track feed switch. This is to protect the information already recorded.

When erasing is selected, the erasing standby switch is turned on and then the erasing switch is turned on. In the conventional device, the recorded contents of the track to be erased are turned on by turning on the erasing standby switch. For confirmation, the playback mode is forcibly entered and the recording of the track is played back and output. After confirming the reproduction output on the monitor, it is erased by the erase switch.

[0006]

After erasing in this manner, in the conventional example, the reproduction mode, which is the initial operation mode, remains in place. , The recording standby switch must be turned on and the recording switch must be turned on. This is troublesome.

It is an object of the present invention to provide a recording / reproducing apparatus which eliminates such inconvenience.

[0008]

A recording / reproducing apparatus according to the present invention comprises a recording means for recording information on a recording medium, a reproducing means for reproducing recording on the recording medium, and an erasing means for generating an erasing signal for the recording medium. And a storage unit that stores the immediately preceding operating state in response to an erase standby instruction, reproduces at least a part of the record to be erased during the erase standby,
After the erase standby is stopped or erased, the state before the erase standby is restored by referring to the storage means.

[0009]

By the above means, when the recording section to be recorded has already been recorded and the user wants to erase, the recording can be executed immediately after the erasure, and the operability is improved.

[0010]

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 magnetic disk called a still video floppy, 12 is a motor for rotating the magnetic disk 10, 14 is a magnetic head for recording / reproducing and erasing, 16 is a head feeding device for feeding the magnetic head 14 in the radial direction of the floppy 10, 18 Is a switch that is connected to the a contact when recording or erasing, applies a recording signal or an erasing signal to the magnetic head 14 and connects it to the b contact when reproducing, and applies the output of the magnetic head 14 to the reproducing system.

Reference numeral 20 is an input terminal for a video signal of an image to be recorded, 22 is a Y signal for separating the video signal from the input terminal 20 into a luminance signal Y + S including a synchronizing signal and a color signal C.
/ C separation circuit, 24 separates the separated color signal C into a color difference signal R
-Y, BY decoder for converting, 26 is a color difference signal R-
A line-sequential switch for line-sequencing Y and B-Y, a pre-emphasis circuit 28 for emphasizing the output of the switch 26, and a modulator circuit 30 for FM-modulating the output of the pre-emphasis circuit 28.

Reference numeral 32 is a pre-emphasis circuit for emphasizing the signal Y + S separated by the Y / C separation circuit 22.
Reference numeral 34 is a modulation circuit that FM-modulates the output of the pre-emphasis circuit 32, and 36 is a combining circuit that superimposes the outputs of the modulation circuits 30 and 34. Reference numeral 37 is a sync separation circuit for separating the horizontal sync signal HD and the vertical sync signal VD from the signal Y + S separated by the Y / C separation circuit 22.

Reference numeral 38 denotes the magnetic head 1 via the switch 18.
A reproduction amplifier for amplifying the output of 4, and a reproduction amplifier 38.
, A BPF for extracting a color component signal from the output, a BPF for extracting a luminance (and synchronization) signal component, and a BPF for 44.
A demodulation circuit for performing FM demodulation and de-emphasis processing on the output of 40, and a demodulation circuit for performing FM demodulation and de-emphasis processing on the output of the BPF 42. The output of the demodulation circuit 44 is a line-sequential color difference signal of the reproduction signal, and the demodulation circuit 46
Is the luminance signal (and the synchronization signal) of the reproduction signal.
Reference numeral 48 is a skew compensating circuit for skew compensating the outputs of the demodulation circuits 44 and 46.

Reference numeral 50 denotes a memory circuit capable of storing at least one screen of a luminance signal and a line-sequential color difference signal of a video signal input from the input terminal 20, or a luminance signal and a line-sequential color difference signal of a reproduced image, which are A / D converted. Vessel 52, memory 54
And a D / A converter 56. 58 is an input terminal 20
The switch selectively supplies the luminance signal and the line-sequential color difference signal of the video signal or the luminance signal and the line-sequential color difference signal of the reproduced image input from the memory circuit 50.

Reference numeral 60 denotes an output (a contact) of the memory circuit 50, a luminance signal of a video signal input from the input terminal 20 and a line-sequential color difference signal (b contact), or a luminance signal of a reproduced image and a line-sequential color difference signal ( A switch for selecting the c contact), 62 is a synchronizing circuit for synchronizing the line-sequential color difference signals selected by the switch 60, and 64 is a synchronizing circuit 62 for the luminance signal (and synchronizing signal) selected by the switch 60.
A video encoder for forming a video signal of a standard television format, for example, an NTSC format, from the color difference signals synchronized by the above, 66 is an output buffer, and 68 is a video output terminal.

Reference numeral 70 is a switch for selecting the output of the synthesizing circuit 36 or the output of the memory circuit 50, 72 is an erasing circuit for generating an erasing signal, and 74 is a signal selected by the switch 70 or the output of the erasing circuit 72. And switch 1
8 is a switch applied to the a-contact.

Reference numeral 76 is a system control circuit for controlling the whole, and is provided with a sub memory 78 for storing control variables, operating states, track numbers for recording / reproducing / erasing. 8
Reference numeral 0 is an operation display device for inputting a predetermined instruction to the system control circuit 76 and displaying a track number to be recorded / reproduced / erased and an operation state.

The operation display device 80 is, for example, a wireless
It is a remote cone troll device. The operation display panel surface is shown in FIG. 82 is a power switch, 84
Is a forward switch for instructing the system control circuit 76 to move the magnetic head 14 to the inner track of the magnetic disk 10, and 85 is a reverse switch for instructing the move to the outer track. 86 is a hold switch, 88 is a source switch, and 90 is a recording standby.
A switch, 91 is an erase standby switch, and 92 is an execution switch for instructing execution of recording or erasing. 94
Is a two-digit numeral display element for displaying the track number. A recording lamp 96 displays a recording operation and the like. Details of the functions of these switches and the like will be described later.

First, the flow of signals when an input image from the input terminal 20 is recorded on the magnetic disk 10 will be briefly described.
The Y / C separation circuit 22 separates the video signal of the input terminal 20 into a luminance signal (and a synchronization signal) Y + S and a color signal C, and the decoder 24 separates the separated color signal into color difference signals RY and B-.
After conversion to Y, the switch 26 line-sequentially converts the color difference signals RY and BY. The pre-emphasis circuit 28 is the switch 2
The line-sequential color difference signal from 6 is emphasized, and the modulation circuit 30 FM-modulates the output of the pre-emphasis circuit 28. In addition, the pre-emphasis circuit 32 is the Y / C separation circuit 22.
The luminance signal separated by the
Modulates the output of the pre-emphasis circuit 32.

The synthesizing circuit 36 superimposes the outputs of the modulating circuits 30 and 34, and the output is applied to the magnetic head 14 via the switches 70, 74 and 18.

The sync separation circuit 37 is a Y / C separation circuit 22.
The sync signal is separated from the luminance signal (and the sync signal) separated by. The separated sync signal is used for controlling the rotation of the magnetic disk 10 when the image input to the input terminal 20 is recorded on the magnetic disk 10 and for storing the image input to the input terminal 20 in the memory circuit 50. Used for timing control.

Next, the flow of signals when reproducing and outputting a recorded image on the magnetic disk 10 will be briefly described. Motor 12
Rotates the magnetic disk 10 at a predetermined speed, and the reproduction output of the magnetic head 14 is transmitted via the switch 18 to the reproduction amplifier 3
8 is applied, amplified, and applied to the BPFs 40 and 42. The BPFs 40 and 42 separate the color difference component modulation signal and the luminance component modulation signal, and the demodulation circuits 44 and 46 perform FM demodulation and de-emphasis processing respectively, and output a reproduction line-sequential color difference signal and a reproduction luminance signal. The skew compensation circuit 48 performs skew compensation on the outputs of the demodulation circuits 44 and 46. The skew-compensated reproduced line-sequential color difference signal is applied to the synchronization circuit 62 via the switch 60, line-synchronized, and applied to the video encoder 64. The skew-compensated reproduction luminance signal is applied to the video encoder 64 via the switch 60.

The video encoder 64 generates a standard format video signal from the input luminance signal and color difference signals RY and BY. The output is applied from the output terminal 68 to the external monitor device via the output buffer 66. The external monitor device displays the reproduced image.

The memory circuit 50 is timing-controlled by the PG signal indicating the rotation phase of the magnetic disk 10 when storing the reproduced image from the magnetic disk 10 and when reading the stored image for recording on the magnetic disk 10. It The operation of this embodiment will be described in detail with reference to the flowcharts of FIG. FIG. 3 shows a flowchart of the main routine of this embodiment.

In the initial state, that is, when the power is turned on by the power switch 82 and the magnetic disk 10 is loaded,
The switch 18 is on the b contact (reproduction side) and the switch 58 is on the b
The switch 60 is connected to the contact point (outputs of the demodulation circuits 44 and 46), the switch 60 is connected to the c contact point (output of the skew compensation circuit 48), and the switch 7 is connected.
0 is connected to the a contact (output of the combining circuit 36),
Hold mode is off. The hold mode refers to an operation mode or state in which the image of the video signal input to the input terminal 20 or the reproduced image from the magnetic disk 10 is stored in the memory circuit 50.

That is, in the initial state, the apparatus of this embodiment is in the reproduction mode, the video signal of the reproduced image from the magnetic disk 10 is output from the output terminal 68, and the external monitor apparatus connected to the output terminal 68 reproduces. Display the image.

In the reproduction mode, when the operation display device 80 is instructed to perform the track feed by the forward feed switch 84 or the reverse feed switch 85 (S1), the system control circuit 76 causes the head feed device 16 to move the magnetic head 14.
Is moved to the inner peripheral side with respect to the operation of the forward feed switch 84 and to the outer peripheral side with respect to the operation of the reverse feed switch 85 (S2).

The source routine is executed in response to the operation of the source switch 88 (S3, 4), and the hold routine is executed in response to the operation of the hold switch 86 (S5, 6), and the recording standby A recording standby routine is executed in response to the operation of the switch 90 (S7,
8), for the operation of the erase standby switch 91,
An erase standby routine is executed (S9, 10).

FIG. 4 shows a flow chart of the source routine for the source switch 88. At present, it is checked whether or not it is the hold mode (S20). If it is the hold mode, the process returns. If it is not the hold mode (S20), when the switch 58 is connected to the a contact (S21), the switch 58 is set to the b contact. At the same time, the switch 60 is switched to the c contact (output of reproduced image) (S22). That is, the memory circuit 50 has a wiring capable of storing the reproduced image from the magnetic disk 10, and the output terminal 68 outputs the reproduced image from the magnetic disk 10.

When the switch 58 is connected to the b contact (S21), the switch 58 is switched to the a contact and the switch 60 is switched to the b contact (the input image of the input terminal 20). As a result, the memory circuit 50 becomes a wiring capable of storing the image of the video signal input to the input terminal 20, and the output terminal 68 outputs the video signal input to the input terminal 20.

FIG. 5 shows an operation flowchart for the operation of the hold switch 86. If the hold mode is not currently set, the hold mode is set (S30, 3
1), if it is the hold mode, release it (S30, 3)
4). After the hold mode, the memory circuit 50
Stores the image input from the switch 58 (S3
2) Connect the switch 70 to the b contact and the switch 60 to the a contact (S33). As a result, it becomes a wiring for recording the image stored in the memory circuit 50 on the magnetic disk 10, and the video signal of the image stored in the memory circuit 50 is output from the output terminal 68 and displayed on the external monitor.

After the hold mode is released, the switch 70 is connected to the a contact (S35). Switch 58 is a
When connecting to the contact (S36), switch 60 to b
Switch to contact (input image of input terminal 20) (S3
7) When the switch 58 is connected to the b contact (S3)
6) The switch 60 is switched to the c contact (reproduced image of the magnetic disk 10). That is, the image from the image source that can be held in the memory circuit 50 is output from the output terminal 68.

FIG. 6 shows an operation flowchart for the operation of the recording standby switch 90 and the execution switch 92. At present, the process differs depending on whether or not the track facing the magnetic head 14 has already been recorded (S40).

In the case of no recording (S40), if the forward feed switch 84 or the reverse feed switch 85 is operated, the magnetic head 14 is moved to the inner circumference side or the outer circumference side according to the operation (S41, 42). If the recording standby switch 90 is operated, it is determined that the recording standby is stopped, and the process returns (S43). If the execution switch 92 is operated without stopping the recording standby, the switch 18,
74 is connected to the a contact, and depending on the connection of the switch 70,
The input image of the input terminal 20 or the image output from the memory circuit 50 is recorded on the magnetic disk 10 (S45).
Then, the magnetic head 14 is moved to the next track (S4
6) Prepare for the next recording.

If the recording has been completed (S40), the recording lamp 9
6 is blinked (S47), and if the forward feed switch 84 or the reverse feed switch 85 is operated, the magnetic head 14 is moved to the inner circumference side or the outer circumference side according to the operation (S48,
42).

When the recording has been completed, it is necessary to erase first, but the recording lamp 96 is made to blink (S47), and the recording standby is stopped by the recording standby switch 90 (S49). Wait (S50). The recording standby is stopped by re-operating the recording standby switch 90, and the process returns (S49). By operating the erase standby switch 91, the process proceeds to the erase standby routine (S51).

FIG. 7 shows a flowchart of the erase standby routine (S10, 51) corresponding to the erase standby switch 91. First, the switch 60 is a, b, c
Which contact of the contact is connected is stored in the sub memory 78 (S60). If the forward feed switch 84 or the reverse feed switch 85 is operated, the magnetic head 14 is correspondingly operated.
Is moved to the inner circumference side or the outer circumference side (S61, 62), and the operation of the execution switch 92 is waited for (S64). If the erase standby switch 91 is operated during that time (S63), the erase standby can be stopped (S63). Execution switch 92
The switch 18 is connected to the contact a and the switch 74 is connected to the contact b in accordance with the operation of (1), and an erase signal is generated from the erase circuit 72 (S65).

The erase signal generated by the erase circuit 72 is applied to the magnetic head 14 via the switches 74 and 18.
As a result, at this time, the record on the track facing the magnetic head 14 is erased.

After stopping the erase standby (S63) or executing the erase (S65), the sub memory 78 is referenced to restore the connection of the switch 60 (S66), and the process returns.

In this embodiment, the memory circuit 50 can record the recorded image on the magnetic disk 10 on another track. Further, at the stage of accepting the operation of the forward feed switch 84 or the reverse feed switch 85, the magnetic disk itself can be exchanged, so that the recording of one magnetic disk can be copied to an arbitrary track of another magnetic disk.

In the present embodiment, the switch 60 is returned to the original state after the erasing is executed or the erasing standby is stopped, so that the state can be restored before the erasing. Further, when the erase standby routine is entered during the recording standby, the process returns to the recording standby routine after returning, so that the processing of the recording standby can be continued.

A magnetic disk called a still video floppy disk has been described as an example of the recording medium.
It goes without saying that the present invention can also be applied to a recording / reproducing apparatus using another recording medium such as a solid-state memory device such as RAM, SRAM, EEPROM, flash memory, etc., an optical disc, a magneto-optical disc, etc. Further, it goes without saying that the information to be recorded / reproduced may be not only images but also voices, text data and the like.

[0044]

As can be easily understood from the above description, according to the present invention, recording can be continued after erasing for recording, and operability is improved.

[Brief description of drawings]

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

2 is a diagram showing an operation display surface of an operation display device 80. FIG.

FIG. 3 is a flowchart of a main routine of this embodiment.

FIG. 4 is a flow chart for source switch 88.

FIG. 5 is a flowchart for a hold switch 86.

FIG. 6 is a flow chart for a recording standby switch 90 and an execution switch 92.

FIG. 7 is a flowchart for an erase standby switch 91 and an execute switch 92.

[Explanation of symbols]

10: magnetic disk 12: motor 14: magnetic head 16: head feeding device 18: switch 20: input terminal 22: Y / C separation circuit 24: decoder 26: line sequential switch 28: pre-emphasis circuit 30: modulation circuit 32: Pre-emphasis circuit 34: Modulation circuit 36: Synthesis circuit 37: Synchronization separation circuit 38: Reproduction amplifier 40, 42: BPF 44, 46: Demodulation circuit 4
8: Skew compensation circuit 50: Memory circuit 52: A /
D converter 54: Memory 56: D / A converter 58:
Switch 60: Switch 62: Synchronizing circuit 64:
Video encoder 66: Output buffer 68: Video output terminal 70: Switch 72: Erase circuit 74: Switch 76: System control circuit 78: Sub memory 8
0: Operation display device 82: Power switch 84: Forward feed switch 85: Reverse feed switch 86: Hold switch 88: Source switch 90: Recording standby switch 91: Erase standby switch 9
2: Execution switch 94: Numerical display element 96: Recording lamp

Claims (1)

[Claims] 1. A recording device for recording information on a recording medium,
An object to be erased is provided with a reproducing means for reproducing the recording of the recording medium, an erasing means for generating an erasing signal of the recording medium, and a storing means for storing the immediately previous operation state in response to an instruction of the erase standby. The recording / reproducing apparatus is characterized in that at least a part of the recording is reproduced, and after the erase standby is stopped or erased, the storage means is referred to return to the state before the erase standby.