JPH06350953A - Video recording reproducing device - Google Patents

Abstract

PURPOSE:To obtain the video recording reproducing device by which a synthesis picture of plural dynamic pictures is easily obtained. CONSTITUTION:The device is a video recording reproducing device, in which a video signal is recorded on a recording medium 1 as one track for each field and reproduced from the recording medium. For example, to obtain a synthesis picture of two kinds of dynamic pictures, a signal of an odd number field of one of two kinds of the dynamic pictures is recorded as an every other track TA. An even number field signal of the other video signal of the two kinds of the dynamic pictures is recorded as remaining track TB at an interval of one track. The recording tracks TA, TB are consecutively reproduced at reproduction and then a synthesis picture of the two kinds of the dynamic pictures is reproduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus which makes it possible to easily obtain a composite image of a plurality of types of moving images.

[0002]

2. Description of the Related Art Conventionally, in order to realize a composite image in which a plurality of moving images are composited, a plurality of video sources, for example, a plurality of VTRs and video cameras are used and these VTRs and video cameras are operated synchronously. By combining the video signals, a composite image is realized.

For example, an image synthesizing technique called chroma key is known. In this technique, for example, a person or the like is photographed by a video camera as a first image on a background of a single color of blue, and its blue background is used as a key. Part, VT
Another second image captured by R or another video camera is combined. According to this chroma key method, a composite image in which the person in the first image is displayed with the second image as the background can be obtained. In this case, when the images are combined, the video signal of the background second image and the video signal of the first image of a person or the like need to be synchronized.

[0004]

However, in the system for realizing a composite image of a plurality of moving images as described above, the device becomes large in scale, and a plurality of VTRs and video cameras are not operated synchronously. In the case of chromakey, it was necessary to prepare a blue background, which was very troublesome to operate.

In view of the above points, an object of the present invention is to provide a recording / reproducing apparatus capable of easily obtaining a composite image of a plurality of moving images.

[0006]

In order to solve the above-mentioned problems, the recording and reproducing apparatus according to the present invention, when the reference symbols of the embodiments described later are made to correspond, the video signal is
In a recording / reproducing apparatus that is recorded and reproduced as one track on a recording medium, video signals of n (n is an integer of 2 or more) kinds of moving images are recorded on a common recording medium with arbitrary time distribution. It is characterized by

For example, one video signal of two types of moving images records the signals of odd fields as every other track, and the other video signal of the two types of moving images described above records the signals of even fields. Record every other track. At this time, the relationship between the odd field and the even field of the video signal is recorded in a state similar to that when a single video signal is recorded.

At the time of reproduction, the recording track is continuously reproduced so that a composite image of the two types of moving images is reproduced.

[0009]

By combining a plurality of moving images recorded by the recording / reproducing apparatus having the above-mentioned structure, the recording medium is reproduced in exactly the same manner as when reproducing a normal recorded recording medium. The picture can be easily obtained.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the recording / reproducing apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the recording / reproducing apparatus according to the present invention.

The example of FIG. 1 is, for example, a camera integrated type 8 mmV
In the embodiment in which the present invention is applied to TR, 10 is a recording / reproducing signal processing system, 20 is a servo system, and 30 is a microcomputer for controlling the whole. A key input operation unit 31 is connected to the microcomputer 30, and in addition to the keys that are generally provided, such as a record key K1 (camera record key (shooting start key)), a play key K2, a stop key K3, and the like. The image recording key KS is especially provided.

In FIG. 1, 1 is a tape, 2A and 2B are recording / reproducing rotary magnetic heads. Head 2A
And 2B have different azimuth angles. Magnetic tape 1
Is wound around the rotary drum 3 to which the heads 2A and 2B are attached over an angular range of a little over 221 degrees, and is driven in a fixed direction by the capstan 4 and the pinch roller 5 to perform a recording / reproducing operation. Is done. A capstan motor 6 drives the capstan. Further, 7 is a drum motor for rotating the drum 3.

In the recording / reproduction signal processing system 10, 11 is a head changeover switch circuit, and 12 is a recording / reproduction mode changeover switch circuit. These switch circuits 11
And 12 are switching signals RFSW from the microcomputer 30.
And R / P control switching.

Reference numeral 13 is a recording amplifier, 14 is a reproduction amplifier, 15 is a video signal processing circuit, 16 is an input end of a video signal, and 17 is an output end of a reproduction video signal. It is assumed that the four-frequency pilot signal for automatic tracking adjustment (ATF) is superimposed on the recording signal in the video signal processing circuit 15, and the audio signal processing system is shown in FIG. Omitted in the example.

In the servo system 20, 21 is a capstan servo circuit and 22 is a drum servo circuit.

The capstan motor 6 is controlled by the servo control signal from the capstan servo circuit 21 so as to transfer the tape 1 at a constant speed. This tape 1
In order to control the traveling speed of the capstan motor 6,
A frequency generator 6A for generating a signal Cfg having a frequency corresponding to the rotation speed is provided, and the signal Cfg is used for the servo circuit 2
1 is being supplied.

Further, the capstan servo circuit 21
In the automatic tracking control (AT), the rotary heads 2A and 2B correctly scan the recording tracks recorded by the heads having the corresponding azimuth angles during reproduction.
F) is also performed. Due to the ATF at the time of reproduction, the signal from the reproduction amplifier 14 is supplied to the ATF error forming circuit 23, and a tracking error signal at the time of reproduction is obtained from this, and this is supplied to the capstan servo circuit 31 as a capstan phase servo error. It is supplied as a signal.

Further, the drum motor 7 includes a rotary head 2
A and 2B are attached with an angular interval of 180 degrees, and the rotary heads 2A and 2B rotate at 30 Hz by a drum servo control signal from the drum servo circuit 22,
Moreover, it is controlled so as to rotate in phase with the video signal.

Due to this servo control, the drum motor 7 is provided with a pulse Dpg indicating the rotational phase of the drum motor 7.
A pulse generator 7A for generating (one pulse for one rotation of the drum) and a frequency generator 7B for generating a signal Dfg having a frequency corresponding to the rotation speed of the drum motor 7 are provided.
The pulse Dpg and the signal Dfg are the drum servo circuit 22.
Is being supplied to.

Further, the vertical synchronizing signal VD from the video signal processing circuit 15 is supplied to the drum servo circuit 22. The vertical synchronization signal VD is a vertical synchronization signal of the input video signal (image pickup signal from the camera unit) during recording, and is a vertical synchronization signal of the reproduction video signal during reproduction. The drum servo circuit 22 controls the phase of the drum motor 7 so that the vertical synchronizing signal VD and the pulse Dpg indicating the rotation phase of the drum 3, and thus the rotary heads 2A and 2B, have a constant phase relationship.

By this phase control, at the time of recording, the rotary head 2A forms the track TA shown in FIG. 2 in the period of, for example, an odd field of the recording video signal so as to form the track TA.
The upper head scans, and the rotary head 2B scans the tape 1 so as to form the track TB shown in FIG. 2 in the period of the even field of the recording video signal. During reproduction, the phase control controls the reproduction signal and the tape 1 of the heads 2A and 2B.
The relationship with the above scanning mode is set to be the same as that during recording.

The pulse Dpg (FIG. 3A) from the pulse generator 7A provided in association with the drum motor 7 and the frequency signal Dfg (FIG. 3B) from the frequency generator 7B are:
It is also supplied to the microcomputer 30, and the microcomputer 30 receives the head switching signal RFSW (see FIG. 3) from these signals Dpg and Dfg.
C) is formed.

Since the pulse PG has a constant phase relationship with the vertical synchronizing signal VD by the drum servo circuit 22, the switching signal RFSW is synchronized with the vertical synchronizing signal VD and the pulse Dpg, as shown in FIG. 3, for example. Further, it is synchronized with the odd field and the even field of the recorded video signal at the time of recording and the reproduced video signal at the time of reproduction.

[Description of Recording Operation] When the recording key K1 (photographing start key) of the camera of the key input operation unit 31 is pressed, the recording mode is set and the switching signal R from the microcomputer is sent.
The switch circuit 12 is switched to the recording side terminal REC side by / P. At this time, the recorded color video signal (imaging signal) from the input terminal 16 has the luminance signal FM-modulated and the color signal frequency-converted to the low frequency side in the video signal processing circuit 15. The output signal of the video signal processing circuit 15 is supplied to the switch circuit 11 via the recording amplifier 13 and the recording side terminal REC of the recording / reproducing changeover switch circuit 12.

The switch circuit 11 is switched by the switching signal RFSW from the microcomputer 30 for each 180 ° rotation section of the drum 3, and the odd field signal of the recording video signal is supplied to the rotary head 2A and the tape 1 is recorded. Is recorded as a track TA, and an even field signal of the recorded video signal is supplied to the rotary head 2B.
Tracks TB are recorded on the tape 1 alternately and sequentially. In the case of 8 mm VTR, the video signal track TA
In and TB, a pilot signal for tracking control during reproduction is frequency-multiplexed and recorded.

In this case, the video signal from the input terminal 16 is
It is supplied to the switching mixing circuit 41. This circuit 41
Is controlled by the microcomputer 30 to supply the video signal from the input terminal 16 to the viewfinder 42 during recording.
2 can be monitored.

[Description of Reproduction Operation] When the reproduction key K2 of the key input operation unit 31 is pressed, the reproduction mode is set, and the switch circuit 12 is switched by the switching signal R / P from the microcomputer.
It is switched to the reproduction side terminal PB side. At this time, the switch circuit 11 is switched by the switching signal RFSW for each 180-degree rotation angle section in which the heads 2A and 2B scan the tracks TA and TB on the tape, and the odd fields from the tracks TA and TB and Reproduction video signals of even fields are sequentially obtained and supplied to the reproduction amplifier 14 via the recording / reproduction changeover switch circuit 12. The output signal of the reproduction amplifier 14 is supplied to the video processing circuit 22, is returned to the original color video signal, and is led to the output terminal 17.

During this reproduction, the capstan servo circuit 2
By 1, the speed and phase of the capstan motor 6 are controlled so that reproduction is performed while the recording track is properly scanned. At this time, the signal from the reproducing amplifier 14 is supplied to the ATF error signal forming circuit 31,
In this circuit 31, an ATF error is formed from the reproduced pilot signal and is supplied to the capstan servo circuit 21 for automatic tracking control (ATF).

The reproduced video signal from the video signal processing circuit 15 is supplied to the switching / mixing circuit 41. At the time of this reproduction, the switching mixing circuit 4 is controlled by the microcomputer 30 so as to supply the reproduced video signal to the viewfinder 42, and the reproduced image can be monitored by the viewfinder 42.

[Description of Composite Image Recording] Next, a procedure for recording a plurality of moving images will be described.

First, in the apparatus having the above-mentioned structure, the first moving image as shown in FIG. 4A is recorded on the tape 1 in the same manner as in the normal recording mode, and the oblique track TA as shown in FIG. 5A is recorded. , TB are alternately recorded to form a recording pattern. As described above, in this example, the track TA is a track formed of odd fields and the track TB is a track formed of even fields.

In this way, with respect to the tape 1 on which the first moving image has been recorded in advance, the even field of the second moving image, in this example, is overwritten on the track TB by the procedure shown in the flowchart of FIG. Will be recorded.

That is, first, a period for obtaining a composite image is set, and at the start of the period for obtaining the composite image, the composite image recording key KS is pressed to put the apparatus in a standby state in the composite image recording mode (step 101). .

Next, in order to capture the second image with the camera, the recording start key KS is pressed to start recording the composite image (step 102). Then, the device performs the preparatory operation similar to the connected state from the start time. That is, the tape 1 is rewound for a predetermined time (step 103), and the track T of the rotary heads 2A and 2B is rewound from the time when the tape 1 is returned to the connection start point.
Tracking control for A and TB, rotary head 2
A drum phase servo for synchronizing the rotational phases of A and 2B with the recording video signal is performed (step 104).

Further, in the case of this example, the reproduction vertical synchronizing signal VD from the video signal processing circuit 15 is supplied to the field discriminating circuit 32 so that the signal recorded on the track TA is an odd field (or an even field). Or
Further, it is determined whether the track TB is an even field (or an odd field). Then, the determination output is supplied to the microcomputer 30, and the microcomputer 30 sends the track T
It is determined whether A and TB are odd field tracks or even field tracks, respectively (step 105).

In the case of this example, in this composite image recording mode, the second moving image is overwritten and recorded on one of the odd field track and the even field track of the first moving image. In the example, the second moving image will be described below as an example in the case of being controlled to be recorded in the even field track and in the case where the even field track is the track TB.

When the tape advances in the reproducing state up to the start of the joint recording (step 10)
6) Go to step 107 and track the second image on track T
Start recording to overwrite only B.

That is, at step 107, a mode switching signal R / P for switching between the recording mode and the reproduction mode.
As shown in FIG. 3D, the head switching signal RFSW
In synchronization with, the odd field is set to the reproduction mode and the even field is set to the recording mode. That is, in the case of this example, the odd field track TA for leaving the first moving image is set to the reproduction mode in the one field section in which the head 2A scans, and the even field track TB for recording the second moving image is set as the head. The recording mode is controlled in the 1-field section where 2B scans. The switch circuit 12 is switched by this mode switching signal R / P.

At this time, in the reproduction mode, the ATF pilot signal in the reproduction signal of the first image is used for A
A TF error is formed and tracking control is performed.

By the above switching control, the even field of the video signal of the second moving image to be recorded from the input terminal 16 is supplied to the head switching switch circuit 11 via the switch circuit 12. Since the switch circuit 11 is switched by the switching signal RFSW synchronized with the mode switching signal R / P, the even field of the video signal of the second moving image is supplied to the head 2B and the second moving image is recorded on the track TB. The even field signals of are overwritten.

Switching signal RFSW and the second signal to be recorded
The video signal fields of the video are completely the same,
In addition, since the microcomputer 30 performs the field discrimination according to the discrimination output from the field discrimination circuit 32, the rewritten track coincides with the field of the second moving image to be recorded without error. That is, it is possible to prevent a situation where the even field signal of the second moving image is recorded on the odd field track of the first moving image.

In the recording in this case, the even field of the second moving picture is overwritten on the even field of the previous moving picture, so that the signal of the even field of the first moving picture is erased and the second moving picture is erased. The signal of the even field of 1 remains as the track TB. As a result, as shown in FIG. 5B, the first moving image signal is recorded on the odd field and the second moving image signal is recorded on the even field on the tape 1.

When a predetermined composite recording end point or recording stop key is pressed (step 10)
8) Then, the composite recording mode ends.

By continuously reproducing the recording pattern thus formed in the same manner as usual, as shown in FIG. 4C, a composite image in which the first moving image and the second moving image are superposed is obtained. be able to.

In the composite image recording mode, the camera section supplies the video signal of the second moving image from the input terminal 16 to the switching / mixing circuit 41, and also the reproduction signal of the first image to the circuit 41. Is being supplied. Then, in this mode, the switching mixing circuit 41 is operated by the control signal from the microcomputer 30 so as to alternately take out the recording video signal and the reproduction video signal for each field and mix them. Therefore, the viewfinder 4
2, the composite image of the first moving image and the second moving image can be monitored.

Incidentally, prior to the actual recording of the composite image, if a test record key or the like (not shown) is operated in the composite image recording standby state, the apparatus starts the reproducing operation and the even field of the second moving image from the input terminal 16 is detected. ,
The odd field of the first moving image is the switching mixing circuit 4
It is composed in 1 and can be monitored with the viewfinder. That is, it is possible to confirm the composite image before the actual recording of the composite image. In this case, when the test mode is released, the tape position is returned to the composite image recording start point.

FIG. 7 shows a feature using the recording / reproducing apparatus according to the present invention. As shown in FIG. 7A, for example, an image of an idol or an artist is recorded in advance. Next, in addition to this, as shown in FIG. 7B,
For example, an image of oneself is picked up by a camera and recorded in every other field as described above. By reproducing the tape thus formed, as shown in FIG. 7C, it is possible to create a composite image in which the image of oneself is superimposed on the image of the idol or artist.

Further, as shown in FIGS. 8A, 8B, and 8C, a scene in which the soul escapes from a dead person, such as a horror movie, can be obtained as a composite image. That is, as shown in FIG. 8A, the first moving image is recorded on the tape in advance. Next, as shown in FIG. 7B, another image to be superposed thereon is recorded as a composite image as described above. That is, as described above, the image of FIG. 8B is recorded on every other field of the tape on which the image of FIG. 8A is recorded. By doing so, as shown in FIG. 8C, an image can be obtained in which the soul is united with the person who has fallen, and the person is more transparent.

In the above example, two moving image signals are recorded for each field, but two moving image signals may be recorded for each frame. Also, instead of two types of videos, three or more types of videos
A composite image may be obtained by sequentially recording each field.

Further, the first moving image may be recorded in one half of one track, and the second moving image may be recorded in the other half, and further, the first moving image may be recorded in the first half of the horizontal section.
The second moving image may be recorded in the latter half. That is, a plurality of types of moving images may be recorded at any time.

When a plurality of types of moving images are recorded with one track for each field, the signals of each track are written in the memory and read from the memory to obtain continuous video signals. , It is possible to take out each moving image separately as an output. By the way, in the case of the above-described two types of moving images, the signal of one field is read twice each to be a signal of one frame, which is used as an output video signal.

Further, the present invention can be applied to a single recording / reproducing device or the like, instead of a VTR with a built-in camera. Further, the present invention can be applied not only to the 8 mm VTR but also to a VHS type or beta type VTR or a camera integrated VTR.

[0053]

As described above, according to the present invention, video signals of a plurality of types of moving images are recorded as different recording areas on a recording medium, and are continuously reproduced at the time of reproduction. It is possible to obtain a composite image as a reproduced image in which a plurality of types of moving images are superimposed. In this case, it is possible to easily obtain a composite image of a plurality of types of moving images without the need for synchronous operation as in the conventional case.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a recording / playback apparatus according to the present invention.

FIG. 2 is a diagram showing a recording track pattern.

FIG. 3 is a timing chart for explaining the operation of the present invention.

FIG. 4 is a diagram showing an example of image composition of a plurality of moving images.

FIG. 5 is a diagram for explaining a state of recording tracks when images are combined.

FIG. 6 is a flowchart of the operation of an embodiment of the main part of the present invention.

FIG. 7 is a diagram showing another example of image composition of a plurality of moving images.

FIG. 8 is a diagram showing another example of image composition of a plurality of moving images.

[Explanation of symbols]

 1 tape 2A, 2B rotary head 3 rotary drum 4 capstan 11 head changeover switch circuit 12 recording / reproduction changeover switch circuit 21 capstan servo circuit 22 drum servo circuit 30 microcomputer RFSW head changeover signal R / P recording / reproduction mode changeover signal

Claims (4)

[Claims] 1. In a recording / reproducing apparatus in which a video signal is recorded on a recording medium as one track for each field and reproduced, n (n is an integer of 2 or more) kinds of video signals are arbitrarily selected. A recording / playback device that records as different recording areas according to the time allocation. 2. The recording / reproducing apparatus according to claim 1, wherein video signals of n (n is an integer of 2 or more) kinds of moving images are recorded as different tracks every n fields (frames), and the video signals are recorded. The recording / reproducing apparatus is designed so that the relationship between the odd field and the even field is recorded in the same state as when a single video signal is recorded. 3. The recording / reproducing apparatus according to claim 2, wherein n = 2 and one of the two types of video signals is a video signal.
The odd field signal is recorded as every other track, and the other video signal of the above-mentioned two kinds of moving images is recorded as the even field signal as the remaining every other track. Is continuously reproduced to reproduce a composite image of the above two kinds of moving images. 4. The recording / reproducing apparatus according to claim 3, wherein each track of the recording medium in which the signals of all fields of one video signal of one of the two types of moving images are recorded is a video signal of the one moving image. Field discriminating means for discriminating which field of the field is being recorded is provided, and in the recording medium, the two types of moving images are recorded on the even field (or odd field) track identified by the field discriminating means. A recording / reproducing apparatus in which an even field (or an odd field) of the other video signal of is recorded.