KR0179526B1 - Compensation device and method of the elimination section of the recording end in screen record reproduction device - Google Patents

Abstract

The present invention relates to a device for erasing an end erasing section in a video device (VCR) and a method thereof. Particularly, when a new image is recorded on an already recorded tape, the seam portion of the image player inevitably generated by the deck mechanism of the image player is erased. The section is compensated to record the image so that the visual inconvenience during playback can be eliminated.

The present invention is a recording control device comprising a microcomputer (2), a key input section (1), a recording system circuit section (4), and an erasing head drive circuit section (6), comprising a load register (7) and a counter (8). An apparatus comprising a recording control counting section (3), an erasing head consisting of a NOR gate (9), a D flip-flop (10), an inverter (11), and an end gate (12), and a control logic section (5); ; If the recording add selection mode signal is not input and the recording add selection mode signal is not input, the normal recording mode is executed. If the recording addition selection mode signal is input, the recording operation is performed simultaneously with recording. If there is no recording pause or recording stop signal, the above recording operation is repeatedly performed, and if the recording pause or recording stop signal is inputted, the erase head is inactivated. 1 course; When the erase head becomes inactive by the first process, the microcomputer 2 outputs data and a recording addition start signal designated by a key selection unit or a remote controller to the load register 7 and the counter 8, and then the counter ( 8) counting the recording control pulses. Then, if there is no recording addition stop signal, and if there is no recording addition stop signal, the above recording control pulse is repeatedly counted or detected, and recording is performed when the recording addition stop signal is inputted. The second process of stopping the mode, initializing the load register 7, the counter 88, and the D flip-flop 10, and ending the recording mode. The method is used for a video player (VCR). do.

Description

Device and Compensation Method for End-Erasing Section Compensation in Video Recording and Reproduction Equipment

1 is a block diagram of an end-record erasing interval compensation apparatus of the present invention.

2 is a circuit diagram of an embodiment of an end-of-write erasing interval compensation device of the present invention.

3 is a signal timing diagram for explaining the operation of the present invention.

(A), (b), (c) of FIG. 4 are pattern diagrams recorded on a tape by the present invention and conventional operation.

5 is a flowchart of a method of compensating for end-of-write erasing interval of the present invention.

6 is a circuit diagram of a conventional VTR recorder.

7 is a flowchart of a conventional VCR recording control procedure.

* Explanation of symbols for main parts of the drawings

1: Key input unit 2: Microcomputer

3: position detection unit 4: recorder circuit unit

5: erase head control unit 6: erase circuit unit

7: load register 8: down counter

9: NOR gate 10: D flip-flop

11: Inverter 12: AND gate

13 erase head driving unit 14 erase head

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for compensating for the terminal erasing interval in a video recording / reproducing apparatus (VCR) and a method for compensating the same. When continuously recording a new video signal, the video is recorded in the erasing section of the video recording seam which is inevitably generated by the deck mechanism, so that the erasing section at the time of reproduction at the connecting portion of two different recorded images The present invention relates to a terminal erasing section compensating device and a compensation method of a video recording / reproducing apparatus capable of solving problems caused by no signal section reproducing.

Referring to the configuration of a recorder circuit in a conventional VCR, as shown in FIG. 6, the microcomputer 20 for controlling the recording and reproducing operation of the video recording and reproducing apparatus system, and the key for selecting the function of the video recording and reproducing apparatus are shown. A key input unit 21 for receiving an input signal from a function selection unit or a remote controller and inputting the input signal to the microcomputer 20, and a recording system for recording a video signal on a magnetic recording medium (video tape) under the control of the microcomputer 20. The circuit section 22 and the erasing circuit section 23 operated by the control of the microcomputer 20 to erase the previous video signal recorded on the video tape.

In the conventional VCR recorder of FIG. 6, when a recording key signal is input from a key input section 21 such as a remote controller, the microcomputer 20 returns to the full width erase head of the erasing circuit section 23, as shown in FIG. Outputs a control signal so that the signal is in the ACTIVE state, and outputs a recording control signal to the recorder circuit section 22 to perform a recording mode for recording the video signal on the video tape, and during the recording, the key input section 21 is performed. When the PAUSE key or the STOP key signal is input from the microcomputer 20, the microcomputer 20 switches the full width erasing head of the erasing circuit section 23 to the inactive state (INACTIVE). Control was made to stop the recording operation.

However, such a conventional apparatus records an image VCR such as (a) between a previously recorded portion (a) and a newly recorded portion (c) as shown in FIG. The deck mechanism (mechanical positional relationship between the full width erase head and the video head drum) inevitably generates the portion b erased by the AB section of the video tape.

That is, as shown in (b) in the traveling system as shown in FIG. 4A, the erasing point A of the full width erasing head is the position B at which recording is started by the recording head mounted on the video head drum. And mechanically spaced apart by a certain distance, and therefore there is always a part b erased by the distance between the two heads in the recording mode in the video tape.

Therefore, when the pause or stop key is input at the time point B during recording and the recording is stopped, the last recorded position B of the newly recorded portion c and the portion (b) erased from the previously recorded portion (a) And the no-signal section (b) is interposed between and the playback position (A) of the previously recorded video signal, and this no-signal section (b) appears as the output of the noise and the display of the noise screen when the video tape is played back. .

In other words, when the videotape is played back, the previously recorded portion (a) cannot be reproduced in succession to the newly recorded portion (c), and the previously recorded portion (a) is reproduced through the middle no-signal section (b). Since this is performed, there is a problem that unnecessary noise components are reproduced.

Therefore, in the conventional VCR, since the erased portion b of the AB section is a no-signal reproduction section during video tape playback, a severe noise component is outputted, and the image at the boundary portion A from the previously recorded portion is output. As the vertical synchronization of the signal appears, the screen display image gradually transitions to the stable state as it passes through the boundary B, but the noise screen is displayed during the elapsed part (b). There was a problem of burden and discomfort.

SUMMARY OF THE INVENTION In view of the above-described conventional problems, the present invention intends to perform a recording pause during a recording mode or a recording stop after recording in order to compensate the erased portion (b) at the end of the image signal recording with the portion where the image is recorded. At the same time, the erase section b switches the full-amplification head to the inactive state for a predetermined time, and simultaneously detects the boundary section AB which is the beginning and end of the connecting portion of the previous recorded image and the current new recorded image of the videotape. By controlling the new image (c) to be recorded continuously until the end (point A) of the previously recorded image (c), the noise reproduction and the output of the noise screen due to no-signal reproduction are eliminated when the video tape is reproduced. An object of the present invention is to provide an apparatus for compensating for the terminal erasing interval in a video recording / reproducing apparatus and a compensation method.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the apparatus for compensating the terminal erasing interval in the VCR of the present invention includes a key input unit 1 for inputting a corresponding control command to the controllers 2 and 5 according to a user's selection; ; An erasing head including an erasing head for erasing a signal recorded on the magnetic recording medium, the erasing circuit unit 6 being controlled to an active or inactive state under the control of the controllers 2 and 5; ; A recording system circuit section 5 including a recording head for recording a signal on a magnetic recording medium, the recording system circuit section 5 being controlled by the control sections 2 and 5 and controlled by the recording operation or the recording stop; A position detector (3) for detecting a position of a signal recorded on the magnetic recording medium from the recorder circuit portion (4) and inputting it to the controllers (2, 5); The operation of the position detection unit 3 is controlled in accordance with the input signal of the key input unit 1 so that the erase operation time of the erase circuit unit 6 and the recording system circuit unit are controlled in accordance with the position detection signal detected from the position detection unit 3. Control units 2 and 5 for controlling the recording operation time of (4); And a terminal erasing section compensating device for a video recording and reproducing apparatus, comprising a.

As an embodiment of the present invention, as shown in Fig. 2, the position detecting section 3 stores a load register for storing reference data of position detection output from the control section 2,5. 7), a down counter (COUNTER) 8 that counts a write control pulse (CTL pulse) to a value stored in the load register 7, and a predetermined value that an output value of the down counter 8 targets. A N flip gate 9 for detecting whether or not and a D flip-flop for latching an output of the NOR gate 9 and inputting a video tape recording position detection signal to the controllers 2 and 5; 10).

Then, the control unit 2, 5 controls the recorder circuit unit 4 and the position detection unit 3 in accordance with the signal input from the key input unit 1, and the write addition start signal START for controlling the erase circuit unit. And an erasing head configured to control the erasing circuit unit 6 in an active or inactive state by receiving the microcomputer 2 that outputs the erasing head control signal ERASE and the control signals START and ERASE output from the microcomputer 2. The erasing head controller 5 includes an inverter 11 for inverting the control signal START output from the microcomputer 2, an output signal of the inverter 11, and the output signal of the inverter 11. And an AND gate 12 which receives the control signal ERASE of the microcomputer 2 and controls whether the erasing circuit unit 6 operates.

The erasing circuit unit 6 receives the full width erasing head 14 of the video tape and the control signals of the controllers 2 and 5 to activate or inactivate the erasing head 14. And an erase head driver 13 for driving in a state.

Meanwhile, the method of compensating for the terminal erasing interval in the video recording / reproducing apparatus of the present invention includes a first method of switching the erase head to an inactive state when a recording pause or stop signal is input in the recording mode state as shown in FIG. Process; A second step of counting a write control pulse to detect and determine a write position according to the count value when the erase head is deactivated by the first step; A third step of controlling the recording head operation time of the first step in response to the recording position determined by the second step; A method of compensating for the terminal erasing interval of a video recording and reproducing apparatus, characterized in that for controlling.

Referring to Figures 1 to 5 the effect of the present invention configured as described above is as follows.

First, as shown in FIG. 1, when a key command by a user is applied to the microcomputer 2 through a key input unit 1 such as a key selection unit or a remote controller, the microcomputer 2 generates a signal according to the present invention. The control procedure is performed.

That is, as shown in FIG. 5, when the recording key signal is input to the microcomputer 2 to enter the recording mode, the microcomputer 2 receives the AND gate 12 of the erasing head control logic 5 connected to the erasing terminal ERASE thereof. The erase head 14 is switched to an active state through the erase head driver circuit 13 connected to the output terminal of the AND gate 12.

At this time, the microcomputer 2 determines whether the recording addition selection mode designated by the key selection unit or the remote controller, not shown, is turned on or off through the tee input unit 1, and if the recording addition mode is off, the conventional method is used. If the recording addition mode is turned on, recording operation is performed and recording control pulse data corresponding to the erase section b or the boundary section AB as shown in (a) of FIG. It outputs to the load register 7 of the position detection part 3 shown in FIG.

The microcomputer 2 determines whether the PAUSE or the STOP key signal is input through the key input unit 1, and if the input is not performed, the microcomputer 2 continues the above-described recording.

In this way, when the recording pause or recording stop signal is input, the microcomputer 2 outputs a control signal through the erasing terminal ERASE to operate the erasing head driver 13 through the AND gate 12. The drive control is performed to switch the erasing head 14 to an inactive state, and outputs write control pulse data from the microcomputer 2 to the load register 7 of the position detection unit 3, and load terminal of the down counter 8. When the write addition start signal START is output to the (LOAD) and the enable terminals (ENABLE), the down counter 8 loads the value of the load register 7, and is then enabled (ENABLE) to load the loaded data. By performing the down count from the value, the counter 8 counts the write control pulses in the direction in which the erase section b as shown in FIG.

That is, the erasing head 14 is not operated during the erasing section b until the value counted by the counter 8 decreases to '0', and the write addition start signal START causes the inverter 11 to turn off. Although the output of the AND gate 12 is 'low' even though it is inverted through and applied to the AND gate 12, the erase head 14 is in an inactive state and the counter 8 has a temporary load register 7. Each time the stored data is inputted and the recording control pulse is inputted, the reduction factor is performed.

At this time, when the data of the counter 8 is detected to be '0' from the NOR gate 9 and latched on the D flip-flop 10, the microcomputer 2 passes through the output terminal Q of the D flip-flop 10. The write addition stop signal STOP is applied.

Therefore, when the write addition stop signal STOP is applied from the D flip-flop 10 of the position detector 3, the microcomputer 2 loads the load register 7 of the position detector 3 via its clear terminal CLEAR. And a clear signal are commonly sent to the clear terminal CLEAR of the counter 8 and the D flip-flop 10 to initialize them, and the execution of the write mode is terminated.

Therefore, the boundary between the previously recorded image and the newly recorded image can be connected to each other and recorded without a no-signal interval. In this case, when a later playback of this portion, it is possible to immediately switch to another recorded image screen without any signal-free reproduction. As a result, there is no fear that a conventional no-signal noise image corresponding to the recording erasing period is output on the screen.

As described above, according to the present invention, when a new image is recorded on a tape of an already recorded image recording / reproducing apparatus, the boundary section at which the previously recorded portion (a) ends as shown in FIG. (A) of FIG. 7A, the erased portion after (A) is removed, and the previously recorded portion (a) and the newly recorded portion (c) are connected to record an image at about the same time, thereby causing visual discomfort during playback. It can eliminate various problems such as burden, deterioration of image quality, and can improve product performance.

Claims (6)

A key input unit 1 for inputting a control command according to a user's selection to the controllers 2 and 5; An erasing head including an erasing head for erasing a signal recorded on the magnetic recording medium, the erasing circuit unit 6 being controlled to an active or inactive state under the control of the controllers 2 and 5; ; A recording system circuit portion 4 including a recording head for recording a signal on a magnetic recording medium, the recording system circuit portion 4 being subjected to a recording operation or a recording stop under the control of the controllers 2 and 5; A position detector (3) for detecting a position of a signal recorded on the magnetic recording medium from the recorder circuit portion (4) and inputting it to the controllers (2, 5); The operation of the position detection unit 3 is controlled in accordance with the input signal of the key input unit 1 so that the erase operation time of the erase circuit unit 6 and the recording system circuit unit are controlled in accordance with the position detection signal detected from the position detection unit 3. Control units 2 and 5 for controlling the recording operation time of (4); Terminal erasing interval compensation device of the video recording and playback device characterized in that it comprises a. The method of claim 1, wherein the position detector (3); The load register 7 which stores the reference data of position detection output from the said control part 2, 5 and the down which counts a write control pulse (CTL pulse) with the value stored in the said load register 7 The NOR gate 9 which detects whether the counter 8, the output value of the down counter 8 has reached a desired value, and the output of the NOR gate 9 are latched ( And a flip-flop (10) for inputting a video tape recording position detection signal to the control unit (2, 5). The method of claim 1, wherein the control unit (2,5); The recording system circuit section 4 and the position detection section 3 are controlled in accordance with the signal input from the key input section 1, and a write addition start signal START and an erase head control signal ERASE for controlling the erase circuit section are output. And an erasing head controller 5 which receives the control signals START and ERASE output from the microcomputer 2 and controls the erasing circuit unit 6 to be in an active or inactive state. An apparatus for compensating for the terminal erasing interval of a video recording / reproducing apparatus. The method of claim 3, wherein the erase head control unit (5); An inverter 11 for inverting the control signal START output from the microcomputer 2, an output signal of the inverter 11, and a control signal ERASE of the microcomputer 2. And an end gate (12) for controlling the operation of 6). A first step of switching the erase head to an inactive state when a recording pause or stop signal is input in the recording mode state; A second step of counting a write control pulse to detect and determine a write position according to the count value when the erase head is deactivated by the first step; A third step of controlling the recording head operation time of the first step in response to the recording position determined by the second step; And a terminal erasing interval compensation method of a video recording and reproducing apparatus, characterized in that for controlling. The method of claim 5, wherein the second process; Loading count data corresponding to the write erasing section by the full width erase head, down counting the loaded count value with a write control pulse, decoding the down counted value to decode the presence or absence of a record addition stop signal, and the like. Determining, and if the recording addition stop signal is not detected, continuing the count, if detected, stopping the recording operation, initializing the count value, and ending the recording operation; The method of compensating for the terminal erasing interval of the video recording and reproducing apparatus, characterized in that controlled by.