KR100210440B1 - Method and apparatus for controlling vcr editting of a camcorder - Google Patents

Abstract

The present invention relates to a device and a method for controlling a video played on a camcorder side to be edited on a recording side VCR. According to the conventional VCR editing apparatus and method, a manual operation of a camcorder and a recording side VCR is required at the same time. Is to solve.

In order to solve the conventional problems, the present invention controls the recording side VCR in the camcorder, but separates the control signal and transmits the control signal to the RF cable, extracts the control signal from the recording side VCR, and performs the corresponding control function. The camcorder controls and edits, reduces the frequency of switch operations, and eliminates the simultaneous operation of equipment, making it easy to edit. It is adopted in a device that edits video data using a camcorder.

Description

VCR Editing Control Device and Method of Camcorder

1 is a block diagram for explaining a conventional VCR editing operation.

2 is a block diagram of the editing control device of the present invention.

3 is a flowchart showing an edit control method according to the present invention.

4 is a circuit diagram of an embodiment of an edit control apparatus of the present invention.

5A to 5E are signal waveform diagrams of respective circuit parts for explaining the operation of the apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

7: Key operation unit 8: Edit recording control means

9 camcorder circuit portion 10 amplification means

11 modulation means 12 RF cable

13 filter means 14 signal conversion means

15: VCR control circuit part for editing

The present invention relates to an apparatus and a method for controlling a picture played on a camcorder side to be edited on a recording side VCR.

In the conventional VCR editing apparatus, as shown in FIG. 1, the playback side VCR and the recording side VCR of the camcorder are connected by a signal transmission line, and the playback side and the recording side VCR are manually operated simultaneously and edited. .

First, a video take on which a signal to be edited is recorded is inserted into the playback VCR deck of the camcorder, and a video tape for recording is inserted into the editing VCR deck.

In the key operation section 1 of the playback VCR, the editing switch is turned on to operate the signal transmission and recording characteristic compensation circuit, and the play switch is operated to check the playback screen while playing the video tape. The operation unit 4 operates the recording switch to record audio and video (AV) signals to be edited on the video tape of the recording side VCR.

At this time, the AV signal is transmitted between the VCR circuits 3 and 6 of the playback and recording VCRs, and in the case of a VCR having a synchronous editing function, an edit signal line is placed between the control circuits 2 and 5 for synchronous editing control. After hypothesis, if the recording side VCR is placed in the recording standby state with the synchronous editing switch on and the start switch is turned on, the playback side VCR is played and the recording side VCR switches to the recording mode at the same time for editing.

At the time of release, the editing VCR is set to the standby state (pause) and the playback VCR is set to the standby state, and the above process is repeated.

However, according to the conventional VCR editing apparatus and method, the camcorder and the recording side VCR have to be operated manually at the same time, which is cumbersome and inconvenient.

In other words, when the camcorder determines that the signal needs to be edited after checking the output signal from the camcorder, it is necessary to operate the recording switch of the VCR for editing, and to use the still switch of the VCR for the recording standby.

In addition, when outputting a signal from the camcorder to the line out, the signal is output regardless of whether the edit switch is on or off. Therefore, it is difficult and inexperienced to use the function of the edit switch. There was a problem that the signal compensation was not made when (editing the screen in the line-in state).

In addition, in case of VCR with simultaneous editing function, a separate synchronous editing terminal other than the AV signal transmitted to the AV line and the RF unit is installed to transmit the control signal to the dedicated line, which causes a cost increase. The above problems have appeared because all switch operations including switches have to be performed in both VCRs.

In order to solve the conventional problems, the present invention controls the recording side VCR in the camcorder, but separates the control signal and transmits the control signal to the RF cable, extracts the control signal from the recording side VCR, and performs the corresponding control function. The present invention will be described below with reference to the accompanying drawings, which aims to facilitate editing by controlling and editing on the camcorder side, reducing the frequency of switch operations, and excluding simultaneous simultaneous operation of equipment.

First, referring to FIG. 2, the editing control apparatus of the present invention is provided with a key control unit 7 which is provided with a recording, editing, and still switch to operate the setting of the editing mode and the control of the editing VCR. Editing recording control means 8 for generating and outputting recording, editing, and still control signals of the editing VCR, a camcorder circuit section 9 including a compensating circuit for the editing AV signal, and the editing An amplification means 10 for discriminating and amplifying the control signal output from the recording control means 8, and a modulation means 11 for transmitting the amplified control signal to the RF cable 12 by pulse width modulation (PWM); Filter signal 13 for extracting and amplifying the control signal from the PWM control signal transmitted to the RF cable 12 and a signal for converting the filtered control signal into a DC signal recognizable by the editing VCR control circuit unit 15 and outputting the signal. The conversion means 14 is comprised.

On the other hand, in the editing control method of the present invention performed by the above apparatus, as shown in FIG. 3, when the key operation section 7 search result recording switch SW1 is on and in the VCR mode, the editing switch SW2 is turned in and out. In the first process of determining the state, and when the determination result edit switch SW2 is out and the camcorder is in the play state, the camcorder circuit unit 9 is controlled to operate the signal compensation circuit and output the recording on control signal of the editing VCR. A second process of performing editing by transmitting to the editing VCR through the RF cable 12; and if the first process discrimination result editing switch SW2 is in a state where the camcorder is in a play state, the signal compensation circuit is operated. A third step of terminating after output of the recording on control signal; a fourth step of determining the in / out states of the edit switch SW2 when the still switch SW3 is on and in the VCR mode. Edit If the value SW2 is out and the recording is in the ON state, the fifth process of outputting the recording standby control signal of the editing VCR to the editing VCR through the RF cable 12 for editing and the fourth process is discriminated. As a result, if the edit switch SW2 is in the ON state and the recording ON state, the sixth process ends after the recording standby control signal is output from the camcorder.

On the other hand, referring to Figure 4 there is shown an embodiment of the editing control device of the present invention, the configuration is as follows.

The key operation section 7 comprises a recording switch SW1 for AV signal recording control, an editing switch SW2 for editing in and out switching, and a still switch SW3 for screen pause operation. Compares the control signals with the resistors R5 and R6 for inputting the output control signal of the edit recording control means 8, the feedback resistor R4 for setting the amplification degree, and the predetermined reference voltage Vf for distinguishing the control signal. Comprising an operational amplifier 16 for amplifying, the modulating means 11 is composed of a triangular wave oscillator 18 for PWM modulation and a comparator 17 for level comparison with the amplified control signal triangular wave signal, the filter means ( 13 is composed of an RC bandpass filter (R7, R8, C1, C2), operational amplifier 19 of the filtered signal and resistors R9, R10, R11 for setting the amplification degree thereof, and signal conversion means (14). Is composed of rectifying diodes (D1, D2), smoothing capacitor (C3) and resistor (R12) of the filtered control signal. 2, R3 is the pullup resistor, VCC is the power supply.

The operation and effect of the present invention made as described above will be described with reference to the operation process of FIG. 3, the embodiment shown in FIG. 4, and the signal waveform diagram of FIG.

When the recording switch SW1 of the key control unit 7 is turned on, a low signal is input to the edit recording control means 8, and according to (a) of FIG. 5, the edit recording control means 8 determines whether or not the VCR mode is used. Determine.

If it is not in the VCR mode, the operation is terminated. In the VCR mode, the state (IN-OUT) of the edit switch SW2 is determined.

When the edit switch SW2 is in the IN state, a low signal is applied to the edit recording control means 8, and when the edit switch SW2 is in the OUT state, a high signal is applied.

When the edit switch SW2 is in the state, it is determined that a signal is input from the outside through the line, and when the camcorder is in the play state, the signal is terminated. Otherwise, a predetermined control signal is output to the camcorder circuit unit 9 to operate the signal compensation circuit. Outputs the recording on signal of the camcorder to record the external signal.

However, when the edit switch SW2 is out, the camcorder confirms that the camcorder is playing and operates the signal compensating circuit, and outputs the recording on control signal (high) of the editing VCR through the resistor R5.

The recording on control signal is amplified by the operational amplifier 16 and input to the comparator 17 as a waveform shown in FIG. 5 (b). (C) of FIG. 5) is compared with the input control signal, and as a result, the PWM modulated control signal is output as shown in (d) of FIG. Supply to the filter means (13).

The signal is removed by the RC bandpass filters R7, R8, C1, and C2, and the noise including the RF signal is removed, and only the pure control signal is extracted, amplified by the operational amplifier 19, and supplied to the signal converting means 14. .

The PWM control signal supplied to the signal converting means 14 is rectified by the diodes D1 and D2, smoothed by the capacitor C3 and the resistor R12, and converted into a DC control signal corresponding to the VCR recording on signal level. (E) in Figure 5)

As the DC conversion control signal is supplied to the VCR control circuit section 15, the VCR control circuit section 15 performs the recording operation.

Δt in FIG. 5E represents a response delay time.

On the other hand, when the still switch SW3 is turned on, a low signal is input to the edit recording control means 8, whereby the edit recording control means 8 determines whether or not the VCR mode is used.

If the determination result is not in the VCR mode, the operation is terminated. In the VCR mode, the state of the edit switch SW2 is determined. If the editing switch SW2 is in the ON state and the recording ON state (SW1 is ON), the REC PAUSE signal of the camcorder is output and terminated.

If the edit switch SW2 is out and the recording on state (SW1 on), the recording standby control signal (high) of the editing VCR is output through the resistor R6.

In this case, the recording standby control signal is inputted to the operational amplifier 16 through a resistor R6 which is set to a different resistance value than the output of the recording on control signal of the editing VCR, so that the result of comparison with the reference voltage Vf is recorded. The DC voltage is at a different level from the ON control signal.

Therefore, this control signal is modulated by the modulation means 11 in the above-described operation, transmitted through the RF cable 12 as a PWM signal of a new duty ratio, extracted by the filter means 13, and transmitted to the signal converting means 14. By this, a predetermined signal corresponding to the recording standby of the editing VCR is supplied to the editing VCR control circuit unit 15 so that the editing VCR is in the recording standby state.

That is, in the present invention, when the editing switch SW2 of the key control unit 7 is switched in, the recording switch SW1 and the still switch SW3 become the recording and still control switch functions of the camcorder, and the editing switch SW2 is turned on. When it is switched out, the recording switch SW1 and the still switch SW3 become the recording or recording standby switch functions of the editing VCR.

As described above, according to the present invention, since the control of the editing VCR is controlled by the camcorder, the inconvenience of simultaneously operating two devices, namely, the editing target (camcorder) and the target target (VCR), can be eliminated. When the AV signal is transmitted to the VCR side, it is transmitted after signal compensation is always performed, which can prevent the deterioration of image quality and reduce the cost by reducing the signal line and operation switch related to editing, as well as the inexperienced user with easy editing operation. There is an effect that can provide convenience to.

Claims (3)

The key operation unit 7 is provided to record, edit, and still switch to operate the setting of the edit mode and to control the VCR for editing, and to record, edit, and edit the VCR for editing depending on whether the key control unit 7 is operated. Editing recording control means 8 for generating and outputting a still control signal, a camcorder circuit section 9 including a compensating circuit for the editing AV signal, and division of the control signal output from the editing recording control means 8; Amplification means (10) for amplification, the modulation means (110) for transmitting the amplified control signal pulse width modulated (PWM) to the RF cable 12, and the control signal from the PWM control signal transmitted to the RF cable (12) Filter means 13 for extracting and amplifying a signal and signal conversion means 14 for converting the filtered control signal into a DC signal recognizable by the editable VCR control circuit unit 15 and outputting it. . 2. The key operating section (7) is composed of a recording switch (SW1) for controlling AV signal recording, an editing switch (SW2) for switching in and out, and a still switch (SW3) for screen pause operation. The amplification means 10 includes a resistor R5, R6 for inputting the output control signal of the edit recording control means 8, a feedback resistor R4 for setting the amplification degree, and a predetermined reference electric power for dividing the control signal. Vf) and an operational amplifier (`16) for comparatively amplifying the control signal, and the modulating means (11) comprises a triangular wave oscillator (18) for PWM modulation and a comparator for level comparing the amplified control signal with a triangular wave signal ( 17), filter means (13) comprises RC bandpass filters (R7, R8, C1, C2) and operational amplifiers (19) of the filtered signal and their amplification degree setting yaw resistors (R9, R10, R11). And the signal converting means 14 includes rectifying diodes D1 and D2, smoothing capacitor C3, and resistor R12 of the filtered control signal. VCR editing controls on the camcorder composed. Key operation unit 7 When the search result recording switch SW1 is on and in the VCR mode, the first process of discriminating the in / out state of the edit switch SW2, and the discrimination result edit switch SW2 are out, and the camcorder is played. A second process of controlling the camcorder circuit unit 9 to operate the signal compensation circuit, outputting the recording on control signal of the editing VCR, and transmitting the edited VCR to the editing VCR through the RF cable 12 for performing the editing; When the first process determination result edit switch SW2 is in the in-state state and the camcorder is in the play state, the third process of operating the signal compensation circuit and ending after outputting the recording-on control signal of the camcorder, and the key operation unit 7 search result still switch ( When SW3) is on and in the VCR mode, the fourth process of determining the in / out state of the editing switch SW2 is performed. If the determination result of the editing switch SW2 is out and recording is on, the recording standby control signal of the editing VCR is supplied. Output by RF A fifth process of performing editing by transmitting to the editing VCR through the cable 12; and ending the output of the recording standby control signal of the camcorder when the fourth process discrimination result edit switch SW2 is in the ON state and the recording ON state. A VCR editing control method of a camcorder comprising a sixth step.