JPH075574Y2 - Electronic still player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electronic still player for reading out video information from a recording medium on which video information is recorded, such as a floppy disk, and displaying it on a television or the like.

[Background of the Invention] The conventional electronic still player has the following two types from the viewpoint of stopping the rotation of the floppy disk.
That is, one does not stop unless a predetermined switch operation is performed and does not automatically stop, and the other one is
If no switch operation is performed for a fixed period of time, it automatically stops. This latter method stops unnecessary drive of the floppy disk and avoids power consumption and damage to the floppy disk. However, this latter method can be used with or without video information stored in the track being read.
The floppy disk is rotationally driven uniformly for the above-described fixed time, and then the rotational driving is automatically stopped. In this sense, there is still wasteful power consumption and there is room for improvement.

[Object of the Invention] The present invention has been made in view of the above circumstances, and an object thereof is to provide an electronic still player capable of reducing unnecessary consumption of a power supply.

[Summary of the Invention] In order to achieve the above object, the present invention determines whether or not video information is recorded in an area of a recording medium being read based on a read signal, and when it is not recorded, the video information is recorded. The gist is that the power supply to the reproduction circuit of is stopped.

[Embodiment] The present invention will be specifically described below based on an embodiment shown in the drawings.

Configuration FIG. 1 shows the circuit configuration of this embodiment. The floppy disk circuit 1 is a circuit section for reading out image information from the floppy disk 1a, and a spindle motor 1d for rotationally driving the floppy disk 1a, a servo control section 1e for controlling the rotation of the spindle motor 1d, and a floppy disk 1a are recorded. It has a reproducing head 1b for reading the displayed video information and a head positioner 1c for controlling the movement of the reproducing head 1b.
The servo control unit 1e is activated by the drive control signal d from the control circuit 8 and rotates the spindle motor 1d at a predetermined speed. The head positioner 1c is controlled by a seek control signal s from the control circuit 8, and the reproducing head 1b is rotationally driven by a spindle motor 1d.
Move it to any track in 1a. The reproducing head 1b reads the video information recorded on the track and sends a read signal to the reproducing head amplifier 2. The reproducing head amplifier 2 is a circuit that amplifies the read signal from the floppy disk circuit 1 and sends it to the next Y / C separation circuit 3.
The Y / C separation circuit 3 is a circuit which separates the given read signal into a luminance modulation signal Y _FM and a color modulation signal C _FM , and sends it out. The luminance modulation signal Y _FM sent from the Y / C separation circuit 3 is a signal in which the luminance signal S including the synchronization signal S is FM-modulated, and the color modulation signal C _FM is line-sequential. The color difference signals (RY) and (BY) are FM-modulated signals. The Y demodulation circuit 4 includes the Y / C separation circuit 3 described above.
_{Is a circuit} that demodulates the luminance modulation signal Y _FM from the above to obtain a luminance signal (Y + S) including the synchronization signal S and gives this luminance signal (Y + S) to the encoder 6. The C demodulator circuit 5 is
This is a circuit that demodulates the color modulation signal C _FM from the C separation circuit 3 to obtain color difference signals (RY) and (BY), and simultaneously sends both color difference signals to the encoder 6. The encoder 6 creates a composite video signal from the luminance signal (Y + S) from the Y demodulation circuit 4 and the color difference signals (RY) and (BY) from the C demodulation circuit 5, and outputs it from the video output terminal 6a. It is a circuit to do.

The control circuit 8 including the CPU 8a is a circuit unit that sends a control signal to each circuit unit to control the electronic still player.
The brightness signal detection circuit 8b built in the control circuit 8 has an integration circuit, and takes in the brightness modulation signal Y _FM from the Y / C separation circuit 3 every predetermined time and integrates it. When it is larger than a predetermined reference value, a video detection signal is output.

The display unit 7 is controlled by the control circuit 8 and is read by the reproducing head 1b at that time. This is a circuit unit that displays the track numbers of the tracks on the floppy disk 1a. The key input unit 9 is a circuit that includes a large number of keys, and sends a corresponding key input signal to the control circuit 8 when any one of them is operated. The power supply circuit 10 is under the control of the control circuit 8.
Playback head amplifier 2, Y, via power supply line D1
Power is supplied to the C separation circuit 3, the Y demodulation circuit 4, the C demodulation circuit 5, and the encoder 6, and via the power supply line D2,
Floppy disk circuit 1, control circuit 8, key input section 9
It is a circuit that supplies power to.

Operation Next, the operation of this embodiment configured as described above will be described.

For example, the playback head 1b is now the floppy disk 1a.
Is set on the track on which the video information is recorded, for example, on the track of track number 43 whose track number is displayed on the display unit 7, and the read signal related to the video is sent from the floppy disk circuit 1 to the reproducing head amplifier 2. Suppose At this time, the read signal is amplified to a predetermined level by the reproducing head amplifier 2 and then sent to the Y / C separation circuit 3, where the luminance modulation signal Y
_{The FM} demodulation circuit 4 is divided into _FM and color modulation signal C _FM.
And the luminance signal detection circuit 8b, and the latter to the C demodulation circuit 5. The Y demodulation circuit 4 obtains a luminance signal (Y + S) including the synchronization signal S from the given luminance modulation signal Y _FM ,
This is given to the encoder 6. Further, the C demodulation circuit 5 demodulates the color modulation signal C _FM to obtain the line-sequential color difference signals (RY) and (BY), and both color difference signals are synchronized to the encoder 6. give. The encoder 6 produces a composite video signal on the basis of the given signals, outputs the composite video signal, and inputs the composite video signal to an image display device (not shown) in which the track number of the floppy disk 1a being read out. The video relating to the video information recorded on the 43 tracks, that is, the electronic still photograph is displayed.

At this time, the luminance signal detection circuit 8b of the control circuit 8 is set to Y
The luminance modulation signal Y _FM from the C separation circuit 3 is fetched at regular intervals for a predetermined time, and the read signal is imaged depending on whether the integrated value of the modulation signal Y _FM is greater than or equal to a predetermined value during that period. It is detected whether or not it is a signal. In this case, since it is a video signal, the integrated value is more than a predetermined value, and the video detection signal is
Give to U8a. Thus, the CPU 8a detects that the video information is recorded on the track of the track number 43 currently being read by the video detection signal for every fixed time,
Until 5 minutes have elapsed from the time when the key input signal designating the track number 43 was sent from the key input unit 9, unless the key input signal from the key input unit 9 was followed by the drive control signal. The drive of the floppy disk circuit 1 is continued by d. After that, when there is no key input signal from the key input section 9 and 5 minutes have passed, the drive of the spindle motor 1d is stopped by the drive control signal d to stop the rotation of the floppy disk 1a, and the power circuit A control signal is sent to 10 to stop the power supply to the reproducing head amplifier 2, the Y / C separation circuit 3, the Y demodulation circuit 4, the C demodulation circuit 5, and the encoder 6 via the power supply line D1. At this time, since the power supply circuit 10 continues to supply power through the power supply line D2, power is supplied to the control circuit 8, the reproducing head 1b is held on the track with the track number 43, and the display section 7 is displayed. 43 display of 1H
Flashes with z. This allows the user to recognize that the automatic stop has been performed. On the other hand, for example,
When the video signal is not recorded on the track of the track number 43 which is being read by the reproducing head 1b, the read signal supplied from the floppy disk circuit 1 to the reproducing head amplifier 2 is a video signal substantially representing black. So Y
Neither the luminance modulation signal Y _FM nor the optical modulation signal C _FM is transmitted from the C separation circuit 3, and eventually, no image is displayed on the image display device (not shown) which inputs the composite video signal from the encoder 6. Not reflected. In addition, as described above, Y
Since the luminance modulation signal Y _FM is not transmitted from the C separation circuit 3, the luminance signal detection circuit 8b of the control circuit 8 cannot transmit the image detection signal at regular intervals to the CPU 8a. This makes CP
The U8a detects that no video is recorded on the track of the track number 43, and at the time when 30 seconds have elapsed from the time when the key input designating the track was sent from the key input unit 9, the above-mentioned Spindle motor 1d as in the case
Of the power supply circuit 10
Stop the power supply via D1. As a result, when there is no video information in the track being read, the rotation of the floppy disk 1a can be stopped in an extremely short time, and unnecessary power consumption and chances of damaging the floppy disk 1a can be reduced.
In the automatic stop state, when another switch is designated as a read target by the switch of the key input unit 9, a control signal for canceling the automatic stop state is sent from the control circuit 8 to the floppy disk circuit 1 and the power supply circuit 10. Then, the above operation is restarted.

The present invention is not limited to the above-mentioned embodiment, and various modifications can be applied without departing from the invention. For example, in the present embodiment, whether or not the video information is recorded on the track being read is determined by the presence / absence of the luminance modulation signal Y _FM from the Y / C separation circuit 3. However, in the color electronic still player, Of course, the determination may be made based on the presence or absence of the light modulation signal C _FM . Further, the recording medium for recording the video signal, that is, the disk is not limited to the floppy disk.

[Effects of the Invention] As described in detail above, the present invention judges whether or not video information is recorded in the area of the recording medium being read based on the read signal, and when it is not recorded, the video information is recorded. Since the present invention relates to an electronic still player that stops the supply of power to the reproduction circuit, it is possible to provide an electronic still player that can reduce unnecessary consumption of power.

[Brief description of drawings]

FIG. 1 is a diagram showing a circuit configuration of an embodiment of the present invention. 1 ... Floppy disk circuit, 1a ... Floppy disk, 1b ... Playback head, 1c ... Head positioner, 1d
...... Spindle motor, 1e ・ ・ ・ Servo control unit, 2 ・ ・ ・ Playback head amplifier, 3 ・ ・ ・ Y / C separation circuit, 4 ・ ・ ・ Y demodulation circuit, 5 …… C demodulation circuit, 6 …… Encoder, 7 …… Display unit, 8 ... control circuit, 8a ... CPU, 8b ... luminance signal detection circuit, 9 ... key input unit, 10 ... power supply circuit, D1, D2 ...
… Power supply line.

Claims (1)

[Scope of utility model registration request] 1. A video signal is read from a recording medium which is divided into a plurality of areas, and a video signal for one screen is recorded in each of the divided areas, and a video is reproduced by a reproducing circuit based on the video information. In an electronic still player, a recording judgment means for judging whether or not video information is recorded in an area of the recording medium being read based on a read signal, and the recording judgment means is an area of the recording medium being read. An electronic still player, comprising: a control means for stopping the power supply to the reproduction circuit when it is determined that the video information is not recorded in the.