JPH0691644B2 - Video recording / playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a video recording / reproducing apparatus, and more particularly to selecting a plurality of image information from image information recorded on a recording medium, and selecting a plurality of image information from the plurality of image information. The present invention relates to a video recording / reproducing apparatus having a function of editing, storing and reproducing one piece of image information, and rewriting the edited image information in the recording medium to facilitate contents search of the recording medium.

[Prior Art] FIG. 6 shows a conventional video recording / reproducing apparatus (hereinafter referred to as VTR).
It is a figure which shows the structure of. In Fig. 6, the conventional VTR
Is a magnetic tape 1 for recording information, a recording system block 21, a head changeover switch 22 for switching magnetic heads 12 and 13 for recording / reproducing information, a rotary transformer 23 for electric / magnetic conversion of a given signal, A tape running drive circuit 25 and a VTR for driving and controlling the running of the magnetic tape 1.
A mode selection switch 26 for selecting the operation mode is included. The recording system 21 includes a video signal source 211 that provides a video signal including a luminance signal and a color signal, a luminance signal pass filter 212 that receives the video signal from the video signal source 211 and passes a luminance signal component, and a video signal source 211. From the color signal pass filter 213, a color signal pass filter 213 for passing a color signal component from the video signal source from, and an FM modulator 214 that frequency-modulates the luminance signal from the luminance signal pass filter 212, and a color from the color signal pass filter 213. A low-pass converter 215 that receives a signal and converts it to a low-frequency, and F
It includes an adder circuit 216 that receives and adds signals from the M modulator 214 and the low frequency converter 215.

The reproduction system block 24 includes the magnetic head 11 and the rotary transformer 2.
3, the head amplifiers 241 and 242 for amplifying the signal given through 3, the adder circuit 243 for sequentially adding the signals from the head amplifiers 241 and 242, and the signal from the adder circuit 243 for frequency modulation An FM luminance signal pass filter 244 that passes a luminance signal component, an FM demodulator 245 that receives an FM luminance signal from the FM luminance signal pass filter 245 and demodulates it in an FM manner, and a reproduction video signal from an adder 243 that receives a low frequency band. A low-pass color signal pass filter 246 that passes the converted color signal component, and a high-pass converter 247 that converts the low-pass signal from the low-pass color signal pass filter 246 into a high-frequency band.
And an adder circuit 248 for receiving and adding the signal from the FM demodulator 245 and the signal from the high frequency converter 247, and an output terminal 249 for outputting the signal from the adder circuit 248. Output terminal 2
One of 49 is grounded.

The mode selection switch 26 includes a recording command switch 261, a reproduction command switch 262, a stop command switch 263, a high speed reproduction command switch 264, and a temporary stop command switch 265.

Next, the operation of the conventional VTR will be described with reference to FIG.

First, the signal processing in the recording mode will be described.
In the recording mode, the switches 221 and 222 included in the head changeover switch 22 are switched to the a-contact side shown in FIG. The video signal generated from the video signal source 211 is a luminance signal with a frequency band up to about 3 MHz, and 3.
It consists of a 58 MHz color signal. The luminance signal passes through the luminance signal pass filter 212 and is given to the FM modulator 214. The FM modulator 214 converts the luminance signal into the FM signal of 3.4 MHz and 4.4 MHz and gives it to the adding circuit 216. On the other hand, the color signal passes through the color signal pass filter 213 and is given to the low-pass converter 215. The low frequency converter 215 converts the color signal into a signal of 629 KHz and supplies it to the adding circuit 216. The adder circuit 216 adds the FM-modulated luminance signal and the low-frequency converted color signal. The addition signal (that is, the frequency-modulated video signal) is transmitted to the head 1 via the switch 221 included in the head changeover switch 22 and the transformer 231 included in the rotary transformer 23.
Given to 3 and switch 222 and transformer 23
Given to the head 12 via 2. The head 12 records a frequency-multiplexed video signal (consisting of a luminance signal and a color signal) on a corresponding track (referred to as A track) of the magnetic tape 1. The head 13 records the frequency-multiplexed video signal on the corresponding track (referred to as B track) of the magnetic tape 1. The heads 12 and 13 are rotary heads and alternately record one track at a time.

Next, the signal processing in the reproduction mode will be described.
In this case, the reproduction command switch 262 is pressed. In response to this, the tape running drive circuit 25 switches each of the switches 221 and 222 included in the head changeover switch 22 to the h contact side shown in FIG. In this state, the video signal recorded on the A track of the magnetic tape 1 is reproduced by the corresponding magnetic head 12 and given to the head amplifier 241 via the transistor 231 and the switch 221. The head amplifier 241 amplifies the given reproduction signal and adds the addition circuit 2
Give to 43. After the head 12 finishes reproducing one track, the video signal recorded on the B track of the magnetic tape 1 is reproduced by the head 13 and given to the head amplifier 242 via the transformer 232 and the switch 222. The head amplifier 242 amplifies the supplied reproduction signal and supplies it to the adding circuit 243. The adder circuit 243 sequentially adds the reproduced signals from the A track and the B track, and supplies them to the FM luminance signal pass filter 244 and the low-pass color signal pass filter 246. The FM luminance signal pass filter 244 passes the FM luminance signal in the frequency band modulated by the FM modulator 214 and gives it to the FM demodulator 245. The FM demodulator 245 FM demodulates the FM luminance signal to derive a luminance signal, and supplies it to the adding circuit 248. On the other hand, the low-pass color signal pass filter 246 passes the low-pass converted color signal and supplies it to the high-pass converter 247. High frequency converter 247
Converts the low-pass converted color signal into a 3.58 MHz color signal and supplies it to the adder circuit 248. The adder circuit 248 is the FM demodulator 245.
From the high frequency converter 247, and outputs it as an image signal to the output terminal 249.

[Problems to be Solved by the Invention] Since the conventional VTR is configured as described above, when reproducing the image information (video signal) recorded on the magnetic tape, what position on the magnetic tape and how I did not know if the image information with various contents was recorded. Therefore,
In order to reproduce the target image, it is necessary to search for the necessary part while reproducing sequentially from the beginning of the magnetic tape in the high speed reproduction mode etc., which requires a long time and troublesome operation. there were.

An object of the present invention is to eliminate the above-mentioned drawbacks and to provide an apparatus which makes it very easy to search for an image recorded on a recording medium.

[Means for Solving Problems] In a video recording / reproducing apparatus according to the present invention, in a video recording / reproducing apparatus for recording and reproducing a video signal on a recording medium, the recording medium is normally recorded / reproduced, fast-forwarded or wound. A recording medium driving means for driving and driving in the return mode; an image information selecting and extracting means for selectively extracting a plurality of image information corresponding to a plurality of video signals recorded on the recording medium; and an image information selecting and extracting means. Storage means for storing a plurality of image information selectively extracted, an image information editing means for editing the plurality of image information stored in the storage means to create new image editing information, and an image information editing means Based on the image editing information created by the image editing information recording means and the image editing information recording means for recording the image editing information created by When the image editing information reproducing / displaying means for reproducing and displaying a plurality of image information and the image information selecting / extracting means selectively extracts a plurality of image information, the recording medium driving means records the image information to be selectively extracted. In the non-existing section, the recording medium is driven to run in the fast-forward mode, and in the section in which the image information to be selectively extracted is recorded, the recording medium is run to drive in the normal recording / reproducing mode, and a plurality of image information is sequentially output by the image information selecting / extracting means. At the same time when the recording medium is driven in the rewind mode by the recording medium driving means in order to selectively extract and to record the image editing information created by the image information editing means at a predetermined position of the recording medium, And a control means for displaying a plurality of image information on the basis of the image edit information by the image edit information reproduction display means.

[Operation] By providing the means as described above, the image information corresponding to a plurality of video contents on the recording medium is sequentially selected and extracted and stored while the recording medium is running, and these are edited to edit the image editing information. To create a table of contents screen or edit / create continuous shots. In addition, before the contents screen is recorded on the recording medium, the contents can be confirmed in advance.

[Embodiment] An embodiment in which the present invention is applied to a magnetic recording / reproducing apparatus (VTR) will be described below with reference to the drawings.

FIG. 1 is a diagram showing the concept of the configuration of a VTR which is an embodiment of the present invention. In FIG. 1, a device 40 for detecting the start and end of the magnetic tape 1, a tape running amount detecting device 41 for detecting the running amount of the magnetic tape, for example, a counter, a tape end detecting device 40, and a tape running amount. In response to a signal from the detection device 41, a recording system block 21, a reproduction system block 24, a video signal memory block 31, and a system control block 50 configured to control the operation of the mode selection switch 26, for example, a microcomputer. It is provided.

FIG. 2 is a block diagram showing a specific structure of a magnetic recording / reproducing apparatus (VTR) which is an embodiment of the present invention. 2, the conventional VTR shown in FIG. 6 is provided with a video signal memory block 31 for newly editing and storing a video signal, for example, a frame memory, and a system control block (see FIG. The first signal changeover switches 321 and 322 and the second signal changeover switch 33, which are switch-controlled by a signal from 50) (not shown in FIG. 2).
1,332 is newly provided. Video signal memory block 3
Reference numeral 1 includes a luminance signal memory 311 for storing a luminance signal component included in a video signal, and a color signal memory 312 for storing a color signal component included in a video signal. Here, the format of the memory that stores the video signal (digital system, analog system,
Although not shown in the figure, parts necessary for fulfilling the memory function such as a signal converter (for example, an analog-digital converter) and a memory address designating part required according to a semiconductor memory, a magnetic memory, etc. are naturally included. Suppose Further, although the tape end detection device 40 and the tape running amount detection device 41 are not shown in FIG. 2, they are naturally included.

FIG. 3 is a diagram showing the configuration of the storage units of the luminance signal memory and the color signal memory. In FIG. 3, the luminance signal memory 311
And the color signal memory 312 are each composed of nine blocks 111.
Divided into ~ 119. Each of the blocks divided into nine stores one image information (one field) in a compressed manner, and the entire nine blocks form one new image information.

FIG. 4 is a diagram showing the position on the magnetic tape of the image information written in the memory among the image information recorded on the magnetic tape in one embodiment of the present invention. In FIG.
The image information recorded on the track 11 located at a position S away from the start end of the magnetic tape 1 in the traveling direction of the magnetic tape 1 and the tracks 12 to 19 located at a constant distance l from the track 11 in this order. Memory recording blocks 111 to 1
Written on 19. One screen consisting of these nine small screens (1
The field) is a compilation of nine recorded contents sampled on the magnetic tape 1 at regular intervals of length l into one screen, and can be called a "table of contents screen" for overviewing the contents of the tape.

FIG. 5 is a diagram showing a position where the image information written in the video signal memory is written in the magnetic tape. In FIG. 5, the image information edited in the video signal memory block 31 is recorded in a track group 21 composed of an appropriate number of tracks located between the starting end 10 of the magnetic tape 1 and the track 11.
The operation of creating a table of contents screen (image information recorded on the track group 21 in FIG. 5) will be described below with reference to FIGS.

First, the magnetic tape 1 on which the image information is recorded is loaded into the VTR, and the table screen creation command mode is given to the system control block 50. System control block 50
Controls the mode selection switch 26 in order to reproduce from the first portion of the magnetic tape 1 and sets the VTR to the rewind mode to rewind the magnetic tape 1. When the rewinding of the magnetic tape 1 is completed, the magnetic tape 1 is ready to start reproduction from the starting end 10. Upon receiving the rewinding completion command from the tape end detection device 40, the system control block 50 puts the luminance signal memory 311 and the color signal memory 312 included in the video signal memory block 31 into the write mode. The control block 50 receives the tape running amount information from the tape running amount detecting device 41, and fast-forwards the running amount S to the track 11 which is selected first. When the track 11 is reached, the mode selection switch 26 is controlled to control the VTR. To the playback mode. Since the memory block 31 is in the write mode, the luminance signal is passed through the FM demodulator 245 to the luminance signal memory 311, and the chrominance signal is output from the low pass color signal pass filter 246 to the chrominance signal memory 312.
Written in each. At this time, each signal is converted into a signal format suitable for the memory format, and subjected to compression processing to make it
It is written in the corresponding memory address of the small screen area of 311,312. The image information recorded on the track 11 is ⅓ (reduced to an area ratio of 1/9) and stored in the recording book 111 in FIG. A method of reducing the original image information into an image having an area ratio of 1/9 is, for example, 1 / vertical in the number of pixels included in one image.
3, "Thinning" the number of pixels of horizontal 1/3 and memorize. Truck 1
When the reproduction of the image information written in 1 is completed (writing in the memory 31 is completed), then the VTR enters the fast-forward mode by a command from the system control block 50, and the VTR moves by a fixed distance l. Magnetic tape 1 track
At the position of 12, the reproduction mode is resumed, and the image information recorded on the track 12 is reduced to an area ratio of 1/9 and written in the storage block 112. By repeating the fast-forward mode and the reproduction mode, nine pieces of image information are sequentially written in each of the storage blocks 111 to 119 at regular intervals l of the magnetic tape 1.

If 9 pieces of image information are compressed and written in each memory 311, 312, the VTR is issued by the command from the control block 50.
Becomes the rewind mode, and the magnetic tape 1 is rewound. At this time, the video signal memory block 31 is set to the read mode,
When the first signal changeover switches 322,322 included in the reproduction system 24 are connected to the d side in FIG. 2 (the mode conversion and the signal changeover control of the switches 321,322 are performed by the control block 50), the signals from the memories 311 and 312 are transmitted. If it is given to the output terminal 249 and connected to a monitor television, one image consisting of nine pieces of image information as shown in FIG. 3 can be obtained. When the magnetic tape 1 is rewound and the tape end detecting device 40 detects that the rewinding is completed, the system control block 50 gives a recording command to the mode selection switch 26 to set the VTR to the recording mode. Also, recording system 2
The signal changeover switches 331 and 332 included in 1 are changed over to the f side in FIG. Since the memories 311 and 312 are in the read mode, the image signal of the memory has the luminance signal component of the FM demodulator.
To the low-pass converter 215 and the adder
216, the changeover switch 22 (connected to the side A in FIG. 2), the rotary transformer 23, and the magnetic head 11 are applied to the magnetic tape 1. The system control block 50 receives the tape traveling distance information from the tape traveling amount detecting device 41 and writes the information stored in the memory 31 to the track group 21 consisting of an appropriate number of tracks on the magnetic tape 1. When the recording of the image information on the track group 21 is completed,
The VTR enters a rewinding mode in response to a command from the control block 50, and the magnetic tape 1 is rewound. When the rewinding is completed, the signal changeover switch 331 is changed over to the e side in FIG. 2 and the signal changeover switches 321 and 322 are changed over to the c side in FIG. By the above operation, the recording of the so-called "table of contents screen" on the magnetic tape 1 is completed.

To play a recorded tape with a "table of contents screen", set the VTR to the normal play mode and play the video signal recorded in the track group 21. At this time, a table of contents image consisting of nine small screens is obtained on the reproduction screen. The sample interval l of the small screen is known in advance, and the numerical value of the tape position counter and the recorded position of the nine small screens on the magnetic tape 1 are in a one-to-one correspondence. To search for the screen to be displayed, instead of setting the VTR to the high-speed playback mode one by one, set the fast-forward mode and run the magnetic tape up to the numerical value of the counter corresponding to the desired small screen.

The same effect can be obtained by changing the above embodiment as follows.

The number of small screens included in the “table of contents screen” is not limited to nine, and may be generally n ² (n = 1, 2, 3, ...).

Further, the “table of contents screen” itself is not limited to one, and may be plural, for example, the case where the “table of contents screen” composed of nine small screens is two.

Further, the intervals at which the images on the magnetic tape are sampled are not limited to equal intervals, but may be sampled for each cohesive content (for example, one program).

Furthermore, it is more effective if the auxiliary information such as the screen number and the counter number is superimposed on the small screen and stored in the memory.

In addition, in the above-mentioned embodiment, the "screen for table of contents" that simplifies the search
However, it goes without saying that if the sample interval is shortened to about the track interval, it can be used for editing and displaying continuous shots.

Further, the recording medium is not limited to the magnetic tape, and the same effect can be obtained even in the case of a recordable and reproducible disk-shaped (disk) medium.

EFFECTS OF THE INVENTION As described above, according to the present invention, a video recording / reproducing apparatus is loaded with a recording medium on which a plurality of video contents have been recorded, and a plurality of video contents on the recording medium are displayed while the recording medium is running. Since it is configured so that it can be sampled and edited / rerecorded as multiple screens, it is easy and quick to create a screen for the table of contents, edit / create continuous shots, etc. without using a complicated dedicated device. In addition, it is possible to provide a video recording / reproducing apparatus having a very useful function that the contents screen can be confirmed in advance before being recorded on the recording medium.

[Brief description of drawings]

FIG. 1 is a diagram showing the configuration of an operation control system of a VTR which is an embodiment of the present invention. FIG. 2 is a block diagram showing the structure of the VTR shown in FIG. FIG. 3 is a diagram showing a storage block of the memory shown in FIG. FIG. 4 is a diagram showing an example of the positions of the tracks used when creating the table of contents screen. FIG. 5 is a diagram showing the position of the index screen recorded on the magnetic tape. FIG. 6 is a diagram showing the structure of a conventional VTR. In the figure, 21 is a recording system block, 24 is a reproduction system block, 26 is a mode selection switch, 40 is a tape end detection device, 41 is a tape running amount detection device, 50 is a system control block, 321, 322, 331 and 332 are changeover switches,
31 is a video signal memory block, 331 is a luminance signal memory, 3
32 is a color signal memory. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-56-154885 (JP, A) JP-B-54-35449 (JP, B2) Journal of the Television Society, Vol. 33, No. 4, (1979) P. 301-P. 309 “6. Special Effects 6-1 Digital Video Effect”

Claims (1)

[Claims] 1. A video recording / reproducing apparatus for recording and reproducing a video signal on a recording medium, and a recording medium driving means for driving the recording medium to run in a normal recording / reproducing mode, a fast-forward mode or a rewinding mode, and the recording medium. Image information selection and extraction means for selectively extracting a plurality of image information corresponding to each of a plurality of video signals recorded in, and the plurality of image information selectively extracted by the image information selection and extraction means. Storage means for storing, image information editing means for editing the plurality of image information stored in the storage means to create new image editing information, and the image editing information created by the image information editing means Image editing information recording means for recording at a predetermined position of the recording medium; and the plurality of images based on the image editing information created by the image information editing means. When the image editing information reproducing / displaying means for reproducing and displaying the information and the image information selecting / extracting means selectively extracts the plurality of image information, the recording medium driving means records the image information to be selectively extracted. In the non-existing section, the recording medium is driven to drive in the fast-forward mode, and in the section in which the image information to be selectively extracted is recorded, the recording medium is driven to drive in the normal recording / reproducing mode and the plurality of image information is selected by the image information selecting / extracting means. Of the image information are sequentially selected and extracted, and the recording medium driving unit rewinds the recording medium to record the image editing information created by the image information editing unit at a predetermined position of the recording medium. When the vehicle is traveling at the same time, the plurality of pieces of image information are simultaneously displayed by the image editing information reproducing / displaying means based on the image editing information. Video recording and reproducing apparatus characterized by comprising a that control means.