JPH01229483A - Video signal recording device - Google Patents

Abstract

PURPOSE:To facilitate video searching actions at the time of editing by synthesizing plural pictures obtained at optical positions recorded on a tape to at least one screen and recording this synthesized picture and the address signals corresponding to said plural pictures at desired points of the tape respectively. CONSTITUTION:An image pickup signal is supplied to a recording circuit 3 via a switch circuit 2 and the recording signal received from the circuit 3 is recorded on a magnetic tape 6 via the magnetic heads 5A and 5B. In this case, the pictures which are controlled by a timer 11 every fixed time are synthesized and recorded in a frame memory 14. At the same time, the time code produced synchronously with the record of the video signal is supplied to a magnetic head 16 via a recording amplifier 19 and recorded as a lengthwise track of the tape 6. Thus the program searching actions are attained easily and quickly at the time of editing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video signal recording device, and particularly to a device for recording video images to be edited onto a magnetic tape.

[Summary of the invention]

In this invention, a plurality of screens recorded at arbitrary positions on a tape are combined into at least one screen, and this combined screen 7 and address signals corresponding to each of the plurality of screens are transferred to a desired position on the tape. By recording the video on the tape, the video recorded on the tape can be searched easily and quickly during editing.

(Prior Art) In order to understand the contents of images recorded by a VTR, a memo containing a list of time codes and scene correspondences is left for each tape, and this memo is used for later editing work. However, as the number of tapes increases, it becomes difficult to manage notes, and it becomes impossible to immediately know what kind of scene the scene is, which increases the time it takes to search for the beginning of a scene, and the time it takes to create a story. was on.

Furthermore, as a technique for displaying the image recorded during editing as a split screen, for example, as described in Japanese Patent Publication No. 61-4437, the screen before and after the editing point is divided and displayed simultaneously. something is proposed.

[Problem to be solved by the invention]

The method described in the above-mentioned document simultaneously displays screens before and after an edit point, and is effective in precisely determining the edit point. However, it is insufficient to know what kind of image is recorded at what position on the entire tape, and it cannot be said to be useful for shortening the search operation for locating the beginning of a desired scene. Ta.

Therefore, an object of the present invention is to create a table of contents that allows the position and contents of images recorded on a tape to be known at a glance, and by recording this table of contents on a tape, it is easy to find the beginning of the image during editing. It is an object of the present invention to provide a video signal recording device that can perform video signal recording quickly.

[Means for Solving the Problems] In the present invention, a plurality of screens of video signals recorded on a tape at an arbitrary tape position are combined into at least one screen, and this combined screen and the plurality of screens are combined. The corresponding address signals are recorded at desired locations on the tape.

[Operation] During the recording operation, the screen is recorded on the tape at regular intervals or at a time specified by a switch operation, and is also written into the frame memory. In this case, each screen is compressed and written to the frame memory. A predetermined number of screens are written to the frame memory to store the split screens. Further, an address signal such as a time code indicating the position of each screen is stored in the memory. After a series of recordings are made on the tape, the time codes corresponding to the split screen and each screen of the split screen stored as described above are recorded as a kind of table of contents at a desired location on the tape, for example, near the end of the tape. Ru.

A tape recorded according to the present invention is first reproduced with a split screen as a table of contents and a time code, and then stored in the memory of an editing machine. The split screen read from the memory of the editing machine is displayed on the monitor, and the user specifies the desired screen while looking at the monitor.

As a result, the time code of the desired screen is given to the editing machine, and the tape position of the VTR is sent to the position where the desired screen is recorded. This cueing operation shortens the time required for a search operation to find a desired screen.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. In FIG. 1, 1 indicates a video camera, and the imaging output signal of the video camera 1 is transmitted to the terminal a of the switch circuit 2.
is supplied to the recording circuit 3 via the side. A recording signal is formed by the recording circuit 3, and this recording signal is supplied to the magnetic heads 5A and 5B via the recording amplifier 4 and recorded on the magnetic tape 6. The magnetic heads 5A and 5B are, for example, 1
Rotating head with opposing spacing of 80° and rotated at frame frequency. By the magnetic heads 5A and 5B,
One field of recording signals is sequentially recorded as one diagonal track.

An image signal from the video camera 1 is supplied to an adder circuit 7. The output signal of the character generator 8 is supplied to the addition circuit 7, and a number corresponding to the screen number is superimposed on the image signal. The output signal of this adder circuit 7 is the gate circuit 9
The signal is supplied to the A/D converter 10 via the A/D converter IO. Gate circuit 9
is turned on at regular intervals by the output signal of the timer 11.

The timer 11 works only during the recording operation, and the timer 11 works only during the recording operation.
Specify the positions at regular intervals. Further, a manual switch 12 is provided in association with the timer 11, and when this switch 12 is turned on, a control signal for turning on the gate circuit 9 is generated. This gate circuit 7
The control signal for is also supplied to the character generator 8, and each time the gate circuit 7 is turned on or the switch 1
Each time 2 is turned on, the screen number generated from the character generator 8 is incremented.

A digital video signal from A/D converter 10 is supplied to compression circuit 13. The compression circuit 13 thins out pixels according to the compression ratio in the -horizontal direction, that is, the sample direction, and in the vertical direction, that is, the line direction. This compression circuit 1
3 output signals are written into the frame memory 14. In this embodiment, as shown in FIG.
3) is divided into nine parts. Therefore, in the compression circuit 13, 1
The pixel data for one frame is thinned out so that it is reduced by 1/3 in both the horizontal and vertical directions. In addition, in FIG. 2, al, b2. c3. d4. e5° f6. g7.
Each of h8 and 19 indicates a screen sampled by the gate circuit 9, and screen numbers 1 to 9 are superimposed on the image signal of each screen in this order.

The digital data of the split screen read out from the frame memory 14 is supplied to the D/A converter 15, and the analog video signal from the D/A converter 15 is supplied to the recording circuit 3 through the terminal side of the switch circuit 2. , magnetic head 5A
and 5B are recorded on the magnetic tape 6.

Reference numeral 16 indicates a fixed magnetic head for recording the time code in the longitudinal direction of the magnetic tape 6. 17 is a time code generation circuit that generates a time code, and 18 is a time code reading circuit that decodes the time code. As the time code, for example, SMPTE time code can be used. The tape position may be indicated by a time code or address data other than the SMPT time code. When recording the imaging output of a video camera, the time code generated by the time code generation circuit 17 is used to indicate the tape position by the recording amplifier 19. The signal is supplied to the magnetic head 16 via the magnetic head 16 and recorded on the magnetic tape 6.

At the same time, the time code is supplied to the time code reading circuit 18 via the switch circuit 20. The switch circuit 20 is turned on by a control signal from the timer 11, and the time code corresponding to the frame stored in the frame memory 14 is supplied to the time code reading circuit 18. Time code data from the time code reading circuit 18 is stored in the memory 22 via the control circuit 21. Therefore, nine time codes indicating the recording position of each screen of the split screen are sequentially recorded in the memory 22. Along with these nine time codes, the memory 22 contains
The screen number of each screen is stored.

The time code and screen number stored in the memory 22 are read out by the control circuit 21 and sent to the switch circuit 23.
The signal is supplied to the time code generation circuit 17 via the time code generation circuit 17. The screen number is inserted into the user bits of the timecode.

The time code from the time code generation circuit 17 is supplied to the magnetic head 16 via the recording amplifier 19 and recorded on the magnetic tape 6. This switch circuit 23 and the above-mentioned switch circuit 2 are controlled by the output of the timer 11. That is, when nine screens equal to the number of divisions are stored in the frame memory 14, the switch circuit 23 is turned on and the switch circuit 2 is switched to the terminal side.

In the embodiment described above, when recording the imaging output of the video camera 1 on the magnetic tape 6, the switch circuit 2 is connected to the terminal a side. Therefore, the imaging signal is transmitted to the switch circuit 2.
The recording signal from the recording circuit 3 is recorded on the magnetic tape 6 by the magnetic heads 5A and 5B. In this case, the screen at fixed time intervals controlled by the timer 11 is compressed and stored in the frame memory 14.

Further, a time code generated in synchronization with the recording of the video signal is supplied to the magnetic head 16 via the recording amplifier 19, and is recorded as a track in the longitudinal direction of the magnetic tape 6. As described above, the time code of the screen stored in the frame memory 14 at regular intervals is sampled by the switch circuit 20 and stored in the memory 22 under the control of the control circuit 21. In this case, the memory 22 also stores the time code of each screen and the corresponding screen number. The time interval for storing the screen is determined by the time that can be recorded on the tape and the number of divisions. For example, if a tape has a recording time of 20 minutes,
When the number of divisions is 9, a screen approximately every 2 minutes and 13 seconds is stored in the frame memory 14 as a divided screen.

As shown in FIG. 3A, when a video signal including screens a1 to a19 is sequentially recorded on the magnetic tape 6 from its starting end 25, the switch circuit 2 is then switched to the terminal b side.
The split screen data stored in the frame memory 14 is read out. The read split screen data is D
The /A converter 15 converts the signal into an analog video signal and supplies it to the recording circuit 3. The output signal of the recording circuit 3 is supplied to magnetic heads 5A and 5B. At the same time, the switch circuit 23 is turned on, and the time code and screen number of the split screen stored in the memory 22 are transferred to the control circuit 23.
and the time code generation circuit 1 through the switch circuit 23.
7 and the generated time code is sent to the recording amplifier 19.
It is supplied to the magnetic head 16 via. The screen number is recorded as a user bit of the time code.

In FIG. 3A, the tape end 26 is indicated by the shaded area 24.
A time code containing the video signal of the split screen and the screen number as user bits is recorded near the . The state of recording in the shaded area 24 is conceptually shown in FIG. 3B. The split-screen video signal from the frame memory 14 is repeatedly recorded at least as many frames as the number of splits. This is because one frame period is required to record the time code corresponding to one screen. In this example, in order to prevent errors in the played time code, (3
X9=27) split-screen video signals and time codes are recorded over frames. Furthermore, magnetic tape 6
A start code 27 corresponding to the start end of the hatched area 24 is recorded on the time code track extending in the longitudinal direction, and an end code 28 is recorded at the end of the hatched area 24.

Note that the video signal of the split screen and the time code including the screen number are not limited to being recorded near the end of the magnetic tape 6, but may be recorded near the beginning of the magnetic tape 6.

When editing using magnetic tape recorded as described above, the editing device includes a device for identifying the start focus 27 and end code 28 in the time code reproduced from the magnetic tape 6, and a split screen. A frame memory for storing and a memory for storing time codes and screen numbers are provided.

First, the magnetic tape 6 is moved from the tape end 26 to the shaded area 2.
4 is recorded.

Next, the shaded area of the magnetic tape 6 is reproduced, and the video signal and time code of the split screen are reproduced.

In this case, starting from the start code 27, the video signal of the split screen and the time code and screen number regarding the split screen are stored in the frame memory and memory of the editing device.

With the above steps, preparation for cueing can be completed. Next, the divided screen data stored in the frame memory is repeatedly read out, and the divided screen is displayed as a still image on the monitor. The user looks at the split screen display and specifies the screen number of the desired screen using a key switch or the like. When a screen number is given, the time code corresponding to this screen number is read from the memory, and the magnetic tape 6 is remotely controlled so as to be moved to the position of this time code. By searching for images before and after the specified screen number, you can quickly find the cue.

Note that in the above embodiment, a split screen for one frame is used, but with a split screen for multiple frames,
A table of contents for images recorded on the magnetic tape may also be formed.

[Effects of the Invention] According to the present invention, a table of contents of images recorded on each recorded magnetic tape, that is, a divided screen in which discrete screens are synthesized, and a time code indicating the position of each screen are recorded. Therefore, when editing, you can easily and quickly find the cue by looking at this table of contents.

Therefore, it is no longer necessary to take notes regarding the recorded video as in the past, and the troublesomeness of managing notes can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a route map showing an example of a split screen, and FIG. 3 is a route map used to explain a recorded tape in this embodiment. Explanation of main symbols in the drawings 1: Video camera, 6: (■ tape, 8: Character generator, 11: Evening timer, 14: Frame memory, 16: Magnetic head for recording and reproducing time code. Agent: Patent attorney Tadashi Sugiura Figure 1 Figure 2 Split screen word d 2 East F Poof Figure 3

Claims (1)

[Claims] A plurality of screens of video signals recorded on a tape at any tape position are combined into at least one screen, and this combined screen and address signals respectively corresponding to the plurality of screens are combined into a desired position on the tape. A video signal recording device that records at certain points.