JPS6234474A - Video deciding device - Google Patents

Abstract

PURPOSE:To automatically select a desired recording place on a VTR tape by recording an optional screen such as the VTR tape at a recording media as a still picture and selecting the screen to be outputted from the tape, etc., by the still picture. CONSTITUTION:A high speed reproducing means (a) is a VTR, etc., which can reproduce at high speed the video recorded at the recording media such as the video tape, and a still video recording reproducing means (b) such as a still video recording device records and reproduces the video reproduced by the high speed reproducing means (a) as the still picture at every screen selectively. By comparing the contents of one or plural scanning lines, a deciding means (c) successively decides whether or not the still video reproduced by the reproducing means (b) and the video reproduced at high speed by the reproducing means (a) are coincident with each other, and generates the deciding output when they are coincident. A control means (d) controls to stop the high speed reproducing means (a) in accordance with the deciding output.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a video judgment device used to search for a video that matches a reference video among a plurality of videos, and particularly relates to a video judgment device that is used when searching for a video that matches a reference video, and in particular, a video judgment device that is used when searching for a video that matches a reference video among a plurality of videos. This allows for quick and inexpensive comparison and judgment of captured images.

[Prior Art] Current VTRs (videotape recorders) are available that can record for long periods of time, such as 8 hours. In the past, when various images were recorded on a videotape, in order to search for something important, most people had to play it back at high speed. However, even if it is called high-speed playback, the speed is about 10 times faster, and for example, if all 8 hours of recording were to be examined, it would take 0.8 hours, or 48 minutes.

[Problems to be Solved by the Invention] Therefore, the general method is to use a VTR counter to check the recording position on the videotape, and then record the counted number and video content on a piece of paper such as a notebook. However, this method is not only troublesome and troublesome, but also has the problem that it is often difficult to remember the video content from the recorded content of notes and the like. Therefore, even if video content is recorded in a notebook or the like, there are many cases where the user ends up watching the video from the beginning using high-speed playback.

In view of the above-mentioned problems, the present invention has been devised so that any screen (generally the beginning of the video) of a continuous recording portion on a VTR tape, etc. can be recorded screen by screen on a still image magnetic disk (Sv floppy). Record it as a still image on a medium, and then
By selecting the screen you want to output from the R tape, etc. using the above-mentioned still image and automatically stopping the VTR at the same screen as that screen, you can automatically select the desired recording location on the VTR tape, etc. The purpose of the present invention is to provide a video judgment device that makes it possible.

[Means for Solving the Problems] In order to achieve the object, the present invention provides a high-speed playback means capable of high-speed playback of video recorded on a recording medium, and a method for selectively reproducing the video reproduced by the high-speed playback means. A still video recording and reproducing means that can record and reproduce each screen, and one or more devices that determine whether or not the still video played back by the still video recording and reproducing means matches the high speed reproducing video played by the high speed reproducing means. The present invention is characterized in that it comprises a determining means that sequentially makes a determination by comparing the contents of the scanning lines, and a control means that performs stop control of the high-speed reproduction means in accordance with the determination output of the determining means.

[Operation] In the present invention, a video on a recording medium (such as a videotape) is reproduced in advance by a high-speed reproduction means (VTR), and is selectively recorded as a still image in a still image recording and reproduction means. After that, when it becomes necessary to search for a video, the still image is played back by the still image recording means, and the screen to be output from the recording medium is selected from the still image. The means are activated together, and it is sequentially determined whether or not the image reproduced at high speed by the high-speed reproduction means matches the still image by comparing the contents of one or more scanning lines, and when the same screen is obtained. Once the judgment is made, the control means stops the high-speed reproduction means in accordance with the judgment output.

In this manner, the present invention automatically selects a desired recording location, allowing the operator to perform other tasks during that time. Furthermore, even if the contents of a memo recorded in a notebook or the like are difficult to remember, it is often possible to recall accurately if the contents are displayed as a still image, so there is an advantage that it is accurate and easy to use as a list.

Therefore, searching for video tapes, etc., which has been troublesome in the past, becomes easier and is expected to be widely used.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the basic configuration of an apparatus according to an embodiment of the present invention.

Here, a is a high-speed reproduction means such as a VTR capable of high-speed reproduction of images recorded on a tape-shaped recording medium such as a videotape. Reference numeral b denotes a still image recording and reproducing means, such as a still video device, which selectively records the video reproduced by the high-speed reproducing means a as a still image one screen at a time. C is a determining means which compares the contents of one or more scanning lines to determine whether the still image already played back by the latter playing means matches the image played back at high speed by the former playing means a. d is a control means, which performs control to stop the high-speed reproduction means a in accordance with the judgment output.

FIG. 2 shows the overall configuration of an embodiment of the present invention.

Configuration A Here, reference numeral 1 denotes a general TV (television) monitor as a comparison image display means for converting an input video signal into a visible image and displaying it. Reference numeral 2 denotes a general VTR (video tape recorder) as a high-speed reproduction means capable of recording images on a magnetic recording medium or the like and reproducing the recorded images at high speed.

3 is a determination means that sequentially determines whether or not the video being played at high speed matches the still video (still video), and when it is determined that they match, the VTR 2 that is being played at high speed is stopped at that point. It is a device. 4 is a general disk recording/reproducing machine as a still image recording/reproducing means capable of recording and reproducing still images on a recording medium such as a magnetic recording medium with random access; One screen of still video can be recorded for each track.

It would be ideal if the VTR2 could be directly controlled from an external device via a dedicated control connector, but since this is not always the case with general VTRs, in this example, even normal VTRs can be controlled. A video judgment system capable of control according to the present invention has been presented. The same applies to the disc recording/reproducing device 4 in this respect.

5 to 12 are constituent parts of the determination device 3. Reference numeral 5 denotes a comparator, which will be described in detail later with reference to FIG.
The images sequentially reproduced at high speed from TR2 are compared, and if the contents of the above-mentioned scanning lines match each other, an output (power control signal) indicating the match is output.

7 is a switch connected to the power supply line of the VTR 2 as a control means, and is set to 0FF by the power control signal of the comparator 5.
(open) and cuts off the power to VTR2, which causes VTR2 to turn off.
Stop the operation of TR2.

A switch 8 (first switch) is turned on (closed) when the comparator 5 is activated, and is connected between the output terminal of the comparator 5 and the two adders 8 and 10. This adder 9 superimposes the video signal of the VTR 2 and the white line signal sent from the comparator 5 through the switch 8. Further, the adder 10 superimposes the video signal from the disk recording/reproducing device 4 and the white line signal sent from the comparator 5 through the switch 8.

Reference numeral 11 denotes a switch for selecting and switching the video signal to be displayed on the TV monitor 1. When the switch is at contact V on the VTR side, it passes the video signal of the VTR 2 input through the adder 9, and when it is at the contact on the disk side, it passes the video signal to the adder 10. Enter through. An RF converter 12 is used to pass the video signal of the disk recording/reproducing device 4, and connects the video signal that has passed through the switch 11 to the antenna terminal of the TV monitor 1.

Next, the operation will be explained.

In the configuration above B recording, first, among the images recorded on the magnetic tape (videotape) 2A of the VTR 2, the images that you want to store, for example, the images used for index etc.
When recording each screen on the disk of the disk recording/reproducing device 4, switch the switch 11 to the VTR side contact, open the switch 8, turn on the VTR2 to TV% monitor 1, turn on the 0th iteration, and set the VTR2 to the normal position. When playback starts at a speed of 2 or a low speed, the video signal of the magnetic tape 2A is transmitted to the adder 8, the switch 11. Through the RF converter 12, the TV monitor 1
input, and the video is displayed on the monitor screen IA. At the same time, the video signal from the VTR 2 is directly transmitted to the disc recording/playback device 4.
Input terminal (VIDEOIN) t, :Mo input.

Therefore, while viewing the image displayed on the screen IA of the TV monitor 1, the operator can activate the recording function of the disc recording/playing device 4 at a desired location, and the video at that location can be recorded on the disc of the disc recording/playing device 4. Can be recorded. In this way, still images can be recorded one after another on the disk by pressing the operation button one after another at the desired screen displayed.

C. Reproduction/Judgment As described above, still images selectively extracted from the magnetic tape are recorded on the disk.Afterwards, how to stop the magnetic tape 2A at the point where the still images were extracted. Do as follows.

First, the contact point of the switch 11 is set to VTR (IIIV), the switch 8 is closed, and then the VTR 2 starts playing with high-speed search.As a result, the screen read from the magnetic tape 2A appears on the TV monitor 1. , Generally, in a high-speed search, the noise bar runs horizontally (in the direction of the horizontal scan line).

The position of this noise bar varies depending on the mechanism of each VTR and the playback speed, but once the VTR to be used and the playback speed are determined, the position of the noise bar is fixed at a fixed position on the screen IA of the TV monitor 1.

Next, the operator turns the volume 6 of the determination device 3 to determine the position of the scanning line (H) where the images will be compared. At this time, the switch 8 is closed (ON) as described above, so the comparison Ia is shown on the screen IA of the TV monitor 1 during the high-speed search.
The white line (white bean sum signal) output from 5 is superimposed through an adder 8 and output.

This white line position is the video of VTR 2 and the disc recording/reproducing device 4.
Since this is the position to compare the white line with the image of do.

Next, when the switch 11 is switched to the disc side and the disc recording/reproducing device 4 is operated for reproduction, a still image of the disc is output to the TV monitor 1. Operator is on TV monitor 1
While looking at the screen, select the target screen you want to search from the VTR tape.Next, switch 11 again to the VTR side, return the tape on VTR 2 to the start position, and start high-speed playback. 6 receives the disc playback signal at the preset white line position (scanning line position) from the disc recording/playback device 4, compares this disc playback signal with the quality R2 magnetic tape playback signal during high-speed playback, and compares both. Determine whether or not they match. At this time, when both the luminance signal and color signal are sufficiently similar, a coincidence signal (power supply control signal) is output from the comparator 5, and the switch 7 is opened (OFF) by this coincidence signal.
), and as a result, the power supplied to the VTR 2 is cut off, and the VTR 2 stops.

Therefore, the magnetic tape of the VTR 2 will stop at a location where an image matching the reproduced image of the disk of the disk recording/reproducing device 4 exists.

Note that if the number of scanning lines set with volume 6 is, for example, one, there is a possibility that the VTR 2 will stop at the wrong screen, but in that case, the VTR 2 may be stopped again.
There is no problem because it can be dealt with by continuing high-speed playback in step 2.

Contents of D Comparator FIG. 3 shows an example of the circuit configuration of the comparator 5 in FIG. This is a separation circuit that separates S and S. 103, 104, and 105 are A/D (analog-to-digital) converters that convert analog signals to digital signals. IO2, 107, 108 is 1
This is an IH memory that stores signals for a scanning line (hereinafter referred to as IH). 109, 110, and 111 are El/A (digital-to-analog) converters that convert digital signals to analog signals. That is, the disc signal is separated by the separation circuit 101 into a luminance signal Y and a color signal R-Y.
.

It is separated into B-Y and synchronization signal, among which the luminance signal Y
and color signals R-Y, B-Y are each sent to an A/D converter 103.
~104 is converted into a digital signal, and the IH is output at the input timing of the scanning line position set by the above-mentioned volume 8.
It is stored in memories 106-10B.

112, 113, 114 are subtracters, and the IH memory 10 is converted to El/A by the D/A converter 109 to txt.
1) The brightness and color signals on the VTR side are subtracted from the brightness and color signals for one (one scanning line) read from 8 to 108. 115, 118, 117 are subtracters 112 to 11
Bypass filter (hereinafter referred to as H, P) connected to the output side of 4
, F, 118, 119, 120 are noise limiters connected to the output sides of H, P, F, 1
21, 122, and 123 are double-wave rectifiers that double-wave rectify the output of the noise limiter.

In addition, 124, 125, 126 are rectified 1) IHa dividers that integrate the 1 minute signal, 127, 128, 12
9 is a reference comparator that compares the output of the IHH divider with a reference level; 130 is an AND gate (hereinafter referred to as AND) that performs an AND operation on the output of the reference comparator.

Further, 131 and 134 convert the synchronization signal S to the vertical synchronization signal V
There is a VHH separator that separates and outputs the horizontal synchronizing signal H and the horizontal synchronizing signal H. Counters 132 and 135 start counting in response to the input of the vertical synchronizing signal V, and count the number of times the vertical synchronizing signal H is generated. 133.13El is a comparator which compares two count values and outputs a pulse °°1' as an output signal when both count values match. 1
37 is a position setting counter whose output value (count value) changes according to the rotational position of the volume 8. 138,
Reference numeral 139 denotes an IH period period generator which outputs a white bean paste signal for the IH period.

One comparator 133 compares the count value of the counter 132 on the disk side and the output value of the position setting counter 137, and if they match, sends a match signal 111+1 to the IH memory 10.
8 to 108 on the write side, AND 130 and IH period H generator 138. The other comparator 138 is V
The count value of the counter 135 on the TR side and the output value of the position setting counter 137 are compared, and if they match, a match signal is output to the read side of the IH memories 106 to 108 and the IH period H generator 138.

Next, a more detailed operation of the above-mentioned comparator 5 will be explained.

First, the operation when setting the scanning line determination position (white line position) will be explained. A high-speed reproduction (search) signal of the VTR 2 is separated by a separation circuit 102, and a synchronization signal S is output from the separation circuit 102. This synchronization signal S is further separated into a vertical synchronization signal V and a horizontal synchronization signal H by a VHH separator 134, and a counter 135 measures the number of times the horizontal synchronization signal H has been generated since the input point (V edge) of the vertical synchronization signal V. Count. The comparator 136 calculates the count value of the counter 135 and the position setting counter 1 having the volume B.
37, and if the two output values match, a pulse indicating a match is sent out from the comparator 1313.

When this pulse is output from the comparator 136, the IH period H
The white bean paste signal for the IH period is sent from the generator 139 to the switch 8.
It is output to the adder 9 via. Now, if the switch 8 is closed (ON), the adder 9 adds the white line of the white bean sum signal to the VTR signal (high-speed reproduction signal) and the white lined image is displayed on the TV monitor! is output above. Therefore, as explained in FIG. 2, the white line can be moved to the optimum position of the image by adjusting the volume 6.

Next, the operation when searching for a video will be explained.

When the disc recording/reproducing device 4 is turned on to the reproduction side and operated, the signal from the disc enters the separation circuit 101, and the luminance signal Y, color signal R-Y, B-Y, and synchronization signal --- This synchronizing signal S is further separated into VH
The H separator 131 separates the signal into a vertical synchronizing signal V and a horizontal synchronizing signal H, and a counter 132 counts the number of times the horizontal synchronizing signal H has been generated since the V edge was input. When the count value of the reference position outputted from the position setting counter 137 set in advance by the volume 8 and the count value of the counter 132 are equal, a pulse is outputted from the comparator 133. This pulse serves as the write control signal.
By being input to the memories 108 to 108, the A/D
The luminance signal Y and color signals R-Y and B-Y digitized by the converters 103 to 105 are stored in IH memories 108 to 108.

On the other hand, the VTR signal input to the separation circuit 102 is also separated into the luminance signal Y, etc., but as described above, the value of the counter 135 that counts the horizontal synchronization signal is the reference scanning line position (video judgment position) of the position setting counter 137. When the count value corresponding to is reached, a pulse is output from the comparator 13G. This pulse is sent as a read control signal for the IH memories 103 to 105, and the leading data of the IH memories 103 to 105 are read out to the VT.
The content of the IH memory is read out in synchronization with the readout timing of the R signal.Then, each signal Y, R-Y, B-Y read out from the IH memories 103 to 105 is separated by the separation circuit 102. The subtracters 112 to +14 calculate and extract the difference signals between the signals Y, RY, and BY.

In the difference signals extracted by the subtracters 112 to 114,
Since the DC difference is not essential as image determination data, this DC difference is removed through H, P, F, 115 to 117. On the other hand, although the disc signal and VTR signal are synchronized in time at the beginning of the signal, there may be a slight difference in time at the end of the signal due to jitter, and in that case, the low level output come out. Also, even if there is a difference between noises, the output with a low level is output from the subtractors 112 to 114.
comes out from

To remove these outputs, H, P, F, 115
The outputs of 117 to 117 are passed to noise limiters 118 to 120.

Further, in order to eliminate malfunctions due to fluctuations in the + and - signs, after double-wave rectification is performed by frequency rectifiers 121 to 123, the outputs after the rectification are integrated over an IH period by IH integrators 124 to 12B, respectively.

If the VTR signal screen and the disk signal screen are the same, the outputs of the IH integrators 124 to 126 should be sufficiently small, so this output is used as the reference comparator 1.
27 to 129, it is compared with a predetermined reference potential. Since it can be determined that the images match when all of the Y, R-Y, and B-Y signals of the disc signal and VTR signal match, the outputs of the reference comparators 127 to 129 are passed through AND 130, and the logical product result is is output as a power supply control signal to control the power supply of the VTR 2. However, the output timing of this power supply control signal is controlled by the coincidence signal of the comparator 133 inputted to AND +30, and this causes the white bean sum signal period to be compared. AND 13 at any other timing
No information is output from 0 to prevent malfunction.

In this embodiment, only the case of IH comparison in which the number of scanning lines at the screen position to be compared is set to one has been described, but the invention is not limited to this, and comparison may be performed using two or more scanning lines. Of course. Furthermore, for example, images may be compared using three scanning lines, and if the contents of two scanning lines match, it may be determined that the images match.It is clear that in this case, incorrect searches can be further prevented. be.

Further, in this embodiment, the position of the scanning line to be compared is initially set manually using the volume 8, but the present invention is not limited to this. It is also possible to automatically select the line position on the determiner 5 side. Furthermore, in order to reduce the jitter effect, it is also preferable to apply linear time correction when reading from the IH memory lOθ~108.

In addition, in this embodiment, assuming that the VTR used cannot be controlled by external signals, in order to stop the VTR 2,
We adopted the simple method of cutting off the power supply to VTR2, but of course, if the model of VTR used can be identified from the beginning, the transmission and reception of control signals to and from the VTR can be switched to VT.
It is easy to do this through the external connector of R, and when the images match, it is easy to control so that only the magnetic tape is temporarily stopped while the power is kept on, and it goes without saying that this is preferable from the point of view of operability.

In addition, in cases where the VTR can be directly driven and controlled by control signals through a connector, an operation button that generates a predetermined control signal is provided on the judgment device side, and for example, if the judgment result of the video is incorrect, the operation button can be simply pressed. ,
It is possible to release the stopped state of the VTR and enter the high-speed search state again, thereby improving the search speed. Further, in this embodiment, a disk is used as an example of a recording medium for recording images to be searched, but of course, a storage means such as a semiconductor memory can also be used.

[Effects of the Invention] As explained above, according to the present invention, matching of search targets is determined by comparing video contents at specified or predetermined scanning line positions, which would be troublesome in the past. The effect is that high-speed retrieval of VTR images, which was difficult in the past, can be performed very easily using a relatively simple and inexpensive device. Additionally, as a result, it is possible to easily construct a new information retrieval system that searches the recorded contents of a VTR using still image display. It can be expected that it will be of high utility value.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the basic configuration of an embodiment of the present invention, FIG. 2 is a circuit diagram showing the overall configuration of the embodiment of the present invention, and FIG. 3 is a circuit diagram showing the circuit configuration of comparator 5 in FIG. 2. It is a diagram. 1...TV monitor, 2...VTR. 3... Judgment device. 4... Disc recording/playback machine. 5...Comparator, 6...Volume, 7.8.11...Switch. 8, lO...adder, 12...RF converter.

Claims (1)

[Scope of Claims] 1) a) high-speed playback means capable of high-speed playback of video recorded on a recording medium; b) selectively recording the video reproduced by the high-speed playback means screen by screen; a still video recording and reproducing means that can be reproduced; and c) one or more scans to determine whether the high speed reproduction video reproduced by the high speed reproduction means matches the still video reproduced by the still video recording and reproducing means. A video determining device comprising: determining means for sequentially determining by comparing the contents of lines; and d) control means for controlling the stop of the high-speed reproduction means in accordance with the determination output of the determining means. 2) In the device according to claim 1, the high-speed playback means has a function of recording video on the recording medium;
the still video recording and reproducing means has a disk-shaped recording medium or semiconductor memory for recording the video, and the determining means has the function of reproducing the recorded video at a normal speed; It is characterized by comprising a scanning line position setting means for setting the positions of a plurality of scanning lines on the screen, and further comprising an image display means for displaying the image to be determined and the scanning line position. Video judgment device. 3) The apparatus according to claim 2, wherein the control means includes a control switch for switching the video signal sent to the video display means depending on whether the video is recorded or judged.