JPH01241283A - Recording and playback device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a recording/playback device that records and plays back video signals on a storage medium, and particularly relates to recorded video signals on a recorded storage medium. This is related to the improvement of the so-called insert editing function that rewrites a part of the .

[Conventional technology]

A suitable example of a conventional recording/playback device is a camera-integrated V
An example of TR will be explained below (first conventional example).
.

FIG. 3 shows the configuration of an example of a conventional camera-integrated VTR. In this figure, 1 is a system control unit, 2 is an imaging device unit that images a subject, converts the captured subject image into an electrical signal and outputs it, and 3 is a unit that transfers the video signal output from the imaging device unit 2 onto a magnetic tape. This is a rotary head type magnetic recording/reproducing device unit (hereinafter referred to as a VTR unit) that records and reproduces data on and from the VTR unit.

The system control unit 1 is a circuit block that controls the operation of the entire system, including various sensors 11 and various operation switches 12 such as a start/stop switch and a playback key.
Based on this information, the system is put into a predetermined operating state using various system control signals 14, and various display devices 13 display various operations.

Further, the imaging device section 2 includes an imaging section 21. Electrical signal processing circuit 2
2. Synchronous signal generation circuit 23. It is composed of a memory circuit 24 and an adder circuit 25.

When performing normal photography, the image capturing section 21 forms an image of the subject through a lens on a charge storage section of an image capturing device such as a COD. The subject image formed on this charge storage section is
The signal is scanned by the signal from the synchronization signal generation circuit 23 and read out in the form of a temporally continuous electric signal. This read electric signal is converted into a normal television signal by the electric signal processing circuit 22, and this television signal is sent to the adder circuit 22.
The image is outputted from the imaging device section 2 via 5.

When you want to superimpose text, etc. on a subject image, first take an image of the text you want to superimpose through a lens, convert this image into an electrical signal, and then store it in the memory circuit 24. While photographing, the storage circuit 24 is activated by a signal from the synchronization signal generator 23 that is synchronized with the scanning of the charge storage section.
An information signal such as a character already stored is read out from the memory circuit 24, and an adder 25 superimposes the output signal from the memory circuit 24 on a signal obtained from the electrical signal processing circuit 22, and this information signal such as a character is superimposed. A signal is output from the imaging device section 2.

On the other hand, the VTR section 3 includes a video signal recording circuit 31. Video signal reproduction circuit 32. Drum control circuit 33. It is composed of a capstan control circuit 34 and the like, and the television signal output from the imaging device section 2 is input to the video signal recording circuit 31.
The signal is converted into an M modulation signal and sent to the rotating magnetic head 3 via a recording/reproducing switch 35 and a rotary transformer (not shown).
6 and recorded on the magnetic tape by the head 36. The drum rotation control circuit 33 drives the drum motor 37 to control the drum to rotate at a constant rate, and the capstan control circuit 34 drives the capstan motor to keep the magnetic tape speed at a predetermined speed. control like this.

Another conventional example is shown in FIG. 4 (second conventional example).

In this figure, 40 is a character generator, which generates and outputs characters, numbers, etc. in the form of image signals by manually operating operation keys (not shown). The positions of letters, numbers, etc. on the screen are determined. In the adder 25, the output signal of the character generator 40 is superimposed on the television signal output from the electrical signal processing circuit 22, and this superimposed signal is sent to the video signal recording circuit 31 and the switch 3.
5 to a rotating magnetic head 36 and recorded on a longitudinally inclined trunk on the magnetic tape.

Further, as a method for inserting and recording a title picture in a desired portion of a tape that has been photographed (recorded) twice, there is the following method (third conventional example). In a camera-integrated VTR having an insert recording function, a recorded tape is first played back to find a desired tape position. A piece of paper with letters, numbers, or pictures written on it is placed in front of the lens, then photographed with a camera and recorded as an insert. In this case, the title picture is inserted in such a way that a part of the recorded video signal is rewritten, and cannot be superimposed on the recorded video signal. Therefore, when inserting a superimposed image of a title picture and another video, after photographing (recording) the title picture signal is superimposed on the new image signal and inserted into the recorded tape.

FIG. 5 shows a block diagram of a portion of a conventional editing controller for tape editing using two VTRs (fourth conventional example). In this figure, 50 is an editing controller, 51 is a character generator, and 5
2 is an adder.

A reproduced video signal from a VTR 53 on the reproduction side is input to an editing controller 50, and a title information signal from a character generator 51 provided in the editing controller 50 is superimposed on the reproduced video signal by an adder 52 and output. The output video signal from this editing controller 50 is sent to a recording side VTR 54, and recorded on a tape in this VTR 54.

[Problem to be solved by the invention]

Since the conventional recording and reproducing apparatus is configured as described above, when superimposing a title image on a subject image, there are the following problems.

Regarding the first and second conventional examples, it is necessary to superimpose the title information signal when recording (recording), and although there is an advantage that the title can be recorded by superimposing it on the image of the subject to be photographed, there are various problems during recording. The problem is that it requires several operations.

Although the third conventional example has the advantage of being able to record the title after photographing, it has the inconvenience of having to prepare a separate subject image or image from the photographed subject image. Furthermore, the fourth conventional example is based on the premise of tape editing by dubbing, so not only two VTRs are required, but also the image quality deteriorates due to dubbing.

This invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a recording and reproducing device with excellent operability that can superimpose a title image on a photographed subject image after photographing.

[Means to solve the problem]

The recording/playback device according to the present invention includes an insert recording means for rewriting a part of the video signal on the recorded storage medium;
The apparatus is provided with reproduction signal storage means for storing reproduction signals from a storage medium, and superimposition recording means for superimposing another information signal on the output signal of the reproduction storage means.

[Effect]

In this invention, a desired video signal is reproduced from the storage medium and stored in the reproduced signal storage means, and then, during insert recording, another information signal is added to the reproduced signal read out from the reproduced signal storage means by the superimposition recording means. By superimposing and recording on a desired part of the storage medium, the title image can be superimposed on any part of the recorded storage medium without deteriorating the image quality (after shooting).

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a system control unit which obtains information from various sensors 11 and various operation switches 12 such as a start/stop switch and a playback key, and controls the system to a predetermined operating state by various system control signals 14. At the same time, various display devices 13 display various operations. 2 is an imaging device section; 21 is an imaging section that forms an image of a subject on a charge storage section of an imaging device such as a COD through a lens; and 23 is a synchronization signal generation circuit that generates various synchronization signals such as a vertical synchronization signal. , 22 is this synchronization signal generation circuit 2
This is an electrical signal processing circuit that converts the signal scanned by the No. 3 signal and read out in the form of an electrical signal into a normal television signal. Reference numeral 3 denotes a VTR section which records the output signal of the imaging device section 2 on a track inclined in the longitudinal direction of the magnetic tape by means of a rotating magnetic head 36, and the VTR section 3 includes a video signal recording circuit 31.3. Video signal reproduction circuit 32. Drum control circuit 33
, a capstan control circuit 34, and the like.

When photographing, a television signal output from the electrical signal processing circuit 22 of the imaging device section 2 is sent to the switch 41.
The video signal is sent to the video signal recording circuit 31 via a switch 35 and a rotary transformer (not shown) after being subjected to signal processing such as FM modulation there. 36 onto magnetic tape.

A method of inserting a title such as letters and numbers into a desired portion of the magnetic tape after photographing and recording as described above will be described. First, based on the key operation, the system control section 1 sends the system control signal 14 to play the VTR section 3 (P
B) mode.

A desired screen recorded on the magnetic tape is searched for while monitoring a monitor screen (not shown) by normal playback, fast forward playback, or fast reverse playback. When a title recording key (not shown) is operated, a reproduced video signal for one field is stored in the reproduced signal storage circuit 42 in response to a system control signal 14 from the system control section 1. Thereafter, the capstan control circuit 34 stops the rotation of the capstan motor 38 to stop tape running, and then drives the magnetic tape in the opposite direction to rewind the magnetic tape by a predetermined amount and enter a recording standby state (pause). When the state (pause) is released, the capstan control circuit 34 controls tape running using a playback control signal that is played back from the magnetic tape, and the rotating head 36
The rotation locus of the image trunk on the magnetic tape should match. When the tape has traveled a predetermined distance, a rotating erase head (not shown) (so-called flying erase head) is activated.
head) starts erasing the video track and starts recording a new video signal.

This new video signal is obtained as follows. The synchronization signal output from the synchronization signal generation circuit 23 is supplied to the reproduction signal storage circuit 42 and the character generator 40. In the reproduction signal storage circuit 42, a read address signal for the field memory is created using the output synchronization signal of the synchronization signal generation circuit 23, and the reproduction signal for one field stored is read out using this address signal. /A converter restores it to a normal television signal and outputs it. The character generator 40 outputs characters, numbers, etc. in the form of image signals by key operation input using operation keys (not shown). The output signal of this character generator 40 is sent to an adder 43.
The output signal of the adder 43 is superimposed on the output signal of the reproduced signal storage circuit 42, and the output signal of the adder 43 is sent to the switch 41. Video signal recording circuit 31. The signal is then supplied to a rotating magnetic head 36 via a switch 35, and recorded by this rotating magnetic head 36 on tracks inclined in the longitudinal direction of the magnetic tape.

Note that from the synchronization signal generation circuit 23, a signal synchronized with the synchronization signal supplied to the reproduction signal storage circuit 42 and the character generator 40 is sent to the drum control circuit 33 and the capsun control circuit 34, and the drum control circuit 33 and the capstan control circuit 34 control the rotation of the drum motor 37 and the capstan motor 38 using the signal obtained from the synchronization signal generation circuit 23 as a reference signal. Therefore, a new video signal is generated consecutively to the already recorded video signal. is recorded. After recording the desired section, tape running is stopped and insert recording is completed.

The contents explained above are illustrated in FIG. 2.

As shown in FIG. 2, a title image is inserted and recorded in a desired portion of an already recorded video signal.

In the above embodiment, the title information signal was obtained by the character generator 40, but similarly to the conventional example shown in FIG. It is also possible to record the title by superimposing it on the output signal from 42.

Furthermore, in the above embodiment, the playback signal storage circuit 42 is constructed using a field memory that stores one field of video signals, and one field of playback video signals is stored. Arrange the
It goes without saying that the same effects as in the above embodiment can be obtained by using the method of storing in the field memory or the method of storing a plurality of fields of reproduced signals in a plurality of fields of memory.

Further, in the above embodiment, a camera-integrated VTR using a rotating head type VTR was described, but the present invention is not limited to this, and the present invention is not limited to this, and the present invention is not limited to this. The present invention can be applied to all recording and playback devices that record and play back video signals.

〔Effect of the invention〕

As described above, the recording/playback device according to the present invention has a playback signal storage means that has an insert function, plays back a video signal on a storage medium, and stores the playback signal, and the playback signal is stored at the time of insertion. Since it is configured so that another information signal can be superimposed and recorded on the signal obtained from the storage means, it is possible to obtain the same image production effect as when conventionally recording a title signal superimposed on the subject image during shooting. In addition, it is possible to perform image processing on any part of the recorded storage medium after photographing, which has the effect of significantly improving operability.

[Brief explanation of the drawing]

FIG. 1 shows a camera-integrated VTR according to an embodiment of the present invention.
2 is a schematic block diagram showing its operation, FIGS. 3 and 4 are schematic block diagrams showing a conventional camera-integrated VTR, and FIG. 5 is a diagram for explaining its operation. FIG. 2 is a schematic diagram for explaining tape editing. ■ is the system control section, 2 is the imaging device section, 3 is the VTR section,
31 is a video signal recording circuit; 32 is a video signal reproducing circuit; 3
5.41 is a switch, 36 is a rotating magnetic head, 40 is a character generator, 42 is a reproduction signal storage circuit, 4
3 is an adder. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] (1) A recording/playback device that records and plays back a video signal on a storage medium, comprising an insert recording means for rewriting a part of the video signal on the recorded storage medium, and an insert recording means for rewriting a part of the video signal on the recorded storage medium; and a reproduction signal storage means for reproducing and storing the reproduced video signal, and during insert recording by the insert recording means, the reproduction video signal stored in the reproduction signal storage means is restored and superimposed with another information signal to produce the above-mentioned information signal. 1. A recording/playback device comprising: superimposition recording means for recording on a storage medium.