KR920006647Y1 - Recording circuit of camcoder by using timer - Google Patents

Abstract

No content.

Description

Recording circuit using timer of camcorder

One embodiment circuit diagram of the present invention.

* Explanation of symbols for main parts of the drawings

10: micom 11: signal determination unit

14 Timer 15 Connector

SW1: Mode Selection Switch SW2: VTR Recorder

SW3: Camera Recorder SW4: Selection Switch

Gl, G2, G4: End gate G3: Inverter

The present invention relates to a camcorder using a timer recording recording circuit of a camcorder (CAMCORDER), which is a VTR integrated video camera, which enables automatic recording operation for a set time using a timer.

In the conventional recording using a camcorder, the user can operate the camcorder's recorder to record the broadcast signal or the camera signal. Therefore, the recording operation must be performed only when the user operates the camcorder during the recording operation using the camcorder.

In view of the above, the present invention allows recording without a user by using a timer. When recording a broadcast signal, reservation recording is possible by adjusting the timer. In the case of camera signal recording, the timer is adjusted and The installation allows the timer to monitor what happened at the adjusted time.

That is, in the present invention, a camcorder, which is a VTR integrated camera, enables recording for a set time at a set time by using a timer, which enables scheduled recording of a broadcast signal and recording of a surveillance function of the camera.

Looking at the configuration and effect of the present invention in accordance with the accompanying drawings in detail as follows.

The present invention is a camcorder having a camcorder control unit 20 for controlling the operation mode and recording operation of the VTR and the camera, wherein the mode selection signal of the camcorder control unit 20 and the output of the timer are logically combined to control the recording of the VTR and the camera. A recording control circuit 30 for outputting a signal is provided, and a connector 15 for connecting a signal line of the recording control circuit 30 to the camcorder control unit 20 is provided.

When the recording control circuit 30 is incorporated in the camcorder, the connector 15 can be deleted.

In other words, the present invention includes a mode selection switch SW1 for selecting an operation mode of the VTR and a camera, a camera recorder SW3, and a recorder SW2 for the VTR, and the mode selection switch SW1 and the recording key SW2. In the conventional camcorder control unit 20 equipped with a microcomputer 10 for recognizing (SW3) input and controlling a recording operation of a camcorder, a camera and a VTR input signal are selected by a mode selection signal of the camcorder control unit 20. Selector switch SW4, a signal determination unit 11 for detecting the presence of a signal by detecting a synchronization signal of the input signal selected by the selection switch SW4, and an output and a timer 14 of the signal determination unit 11; AND gate G1, which ANDs the output of the "), AND gate G2, which ANDs the output of the AND gate G1 and the mode selection signal, and outputs the VTR recording control signal, and the output of the AND gate G1. And inverted by inverter G3 A connector for connecting the signal between the camcorder control unit 20 and the recording control circuit 30 is formed by the recording control circuit 30 having an AND gate G4 for logically multiplying a wood selection signal to output a camera recording control signal. 15).

Here, the VTR recording control signal output from the AND gate G2 of the recording control circuit 30 is connected to control the driving of the transistor Q1 connected in parallel to the recording key SW2 for the VTR, and output from the AND gate G4. The camera recording control signal is connected to the camera recording / standby terminal of the microcomputer 10.

The signal determination unit 11 including the sync separator 12 and the sync detector 13 outputs a high level when there is a sync signal of the VTR or a camera input signal, and outputs a low level when there is no sync signal. ) Outputs the low level normally, and when the set "on" time is reached, the high level is output until the "off" time.

The present invention looks into the effect of selecting the VTR mode and the camera mode.

First, a case in which the VTR signal is input and the timer 14 operates while the VTR mode is selected by connecting the mode selection switch SW1 as shown in the drawing will be described.

At this time, since the high level mode selection signal selected by the mode selection switch SW1 is applied to the pin 2 of the connector 15, the selection switch SW4 is connected to the upper side as shown in the drawing as the control signal is applied at the high level. Will be.

Therefore, the VTR input signal is applied to the signal determining unit 11 through the selector switch SW4 through the pin 3 of the connector 15, and at this time, the normal VTR signal is applied to the signal determining unit 11 to synchronize the signal. After the synchronous signal is separated by the separator 12, the separated synchronous signal is detected by the synchronous detector 13 to output a high level when a normal VTR signal is input.

In this way, when the signal determination unit 1l outputs the high level, the timer 14 outputs the high level when the set " on " time is reached.

Therefore, when the VTR signal is input with the VTR mode selected and the timer 14 operates to become the " on " time, the outputs of the synchronous determination unit 11 and the timer 14 become high levels to logic these two signals. The output of the AND gate G1 to be multiplied is at a high level, and the high level output of the AND gate G1 is applied to the AND gates G2 and G4 as one input.

At this time, the mode selection signal applied to the high level at the pin 2 of the connector 15 by selecting the VTR mode is applied as another input to the AND gate G2 while being inverted by the inverter G3 and then the AND gate G4. ), The output of the AND gate G2 is at a high level, and the output of the AND gate G4 is at a low level.

The high level output of the AND gate G2 is a VTR recording control signal through the pin 5 of the connector 15 and then "turns on" the transistor Q1 connected in parallel to the recording key SW2 for the VTR. ) Records the VTR input signal by recognizing that the recording key SW2 for VTR is pressed.

In the above automatic recording operation of the VTR input signal, if the output of the signal determination unit 11 becomes low level because the VTR signal is not input or the timer 14 output becomes low level after the set time of the timer 14 passes, the AND gate The output of (G2) becomes low level, and transistor Q1 is " turned off ", thereby stopping its operation.

Therefore, the camcorder 14 can automatically record the VTR input signal at a desired time using the timer 14, and the recording operation is stopped when the VTR input signal disappears even when the timer 14 is in operation.

Next, a case in which the camera signal is input and the timer 14 operates while the camera mode is selected by connecting the mode selection switch SW1 to the opposite position in the drawing will be described.

When the camera select mode is selected by the mode selection switch SW1, a low level is applied to the pin 2 of the connector 15 to select a camera signal applied through the pin 4 of the connector 15 from the selection switch SW4. To be applied to the signal determining unit 11.

Then, the signal determination unit 11 separates and detects the synchronous signal in the camera signal and outputs a high level when there is a camera signal. Also, since the timer 14 is set, the signal determination unit 11 outputs a high level when the set time comes. The output of the AND gate G1 that logically multiplies the output of the determination unit 11 and the timer 14 becomes a high level, and the high level output of the AND gate G1 is applied to the input side of the AND gate G2 (G4). It is done.

On the other input side of the AND gate G2, a low level mode selection signal is applied from the pin 2 of the connector 15, while on the other input side of the AND gate G4, the pin 2 of the connector 15 is applied. Since the low level mode selection signal is applied after being inverted in the inverter G3, the output of the AND gate G2 becomes low level and the output of the AND gate G4 becomes high level.

The high level output of the AND gate G4 passes through the pin 6 of the connector 15 as a camera recording control signal and is then applied to the recording / standby terminal of the microcomputer 10 so that the microcomputer 10 automatically receives the camera signal. You will be recording.

In the automatic recording operation of the camera signal described above, when the camera signal is not input and the output of the signal determination unit 11 becomes low level or the output of the timer 14 becomes low level, the output of the AND gate G4 becomes low level. Therefore, the microcomputer 10 stops its operation by maintaining the standby state.

Therefore, the timer 14 can automatically record the camera input signal as the desired time at a desired time. If the camera input signal disappears while the timer 14 is in operation, the recording operation is stopped.

As described above, the present invention allows a camcorder to record by using a timer. When recording a VTR signal, a predetermined timed recording is enabled by the timer, and when a camera signal is recorded, the time set by the timer is recorded. It is possible to monitor the situation occurring in a certain place during the recording operation of the camcorder to eliminate the inconvenience of having to be together, and the timer can effectively use the reservation function of the VTR and the camera monitoring function.

Claims (2)

The camcorder selects the operation mode of the VTR and the camera, and recognizes the input of the recording key (SW2) and the SW3 that selects the recording operation of the VTR and the camera. In the camcorder configured with the camcorder control unit 20, a mode selection signal selected by the mode selection switch SW1 of the camcorder control unit 20, a detection signal for detecting the VTR and the camera input signal, and an output signal of the timer 14 are detected. A recording control circuit 30 for applying a VTR and a camera recording control signal to the camcorder control unit 20 by logical combination with a logic element, and a connector for cutting a signal between the camcorder control unit 20 and the recording control circuit 30 ( And a recording circuit for using a timer of a camcorder, comprising: 15). The recording control circuit (30) of claim 1, wherein the recording control circuit (30) includes a selection switch (SW4) for selecting a camera and a VTR input signal according to a mode selection signal of the camcorder controller (20), and an input signal selected by the selection switch (SW4). A signal determination unit 11 for detecting the presence of a signal by detecting a synchronization signal, an AND gate G1 for ANDing the output of the signal determination unit 11 and the output of the timer 14, and the AND gate G1. AND gate G2 for controlling transistor Q1 connected in parallel with VTR recorder SW2 by multiplying the output and the mode selection signal of the VTR, and the mode selection inverted by the output of the AND gate G1 and the inverter G3. 24. A timer-using recording circuit of a camcorder comprising an AND gate (G4) which multiplies a signal by a logical signal and applies it to a recording / standby terminal of a microcomputer 10 as a camera recording control signal.