JPH0666936B2 - High speed VTR device - Google Patents

Description

The present invention relates to a high speed VTR device for slow motion reproduction.

[Conventional technology]

2. Description of the Related Art Conventionally, a high-speed camera that records a moving image and fast-forwards a film in order to analyze the fine movement of the moving image has been widely used in various fields.

[Problems to be solved by the invention]

However, such a conventional apparatus is not suitable for analyzing the subject while changing the condition of the subject by trial and error because the image can be viewed only after the film is developed. There is a VTR device as a device that can be played back immediately after imaging, but this device is for recording images on a magnetic tape by a head that is rotating at high speed, but with the current technology, the head speed is higher than the current one. It is difficult to rotate, so there was a problem that high-speed shooting was not possible with the VTR device.

[Means for solving problems]

In order to solve such a problem, the present invention relates to a camera that delays a vertical synchronizing signal to pick up an image, a delay circuit that matches the phases of output signals of the cameras, a combining circuit that combines respective outputs, and a combining circuit. And a recording device for recording the output.

[Action]

The phases of video signals having different timings of the vertical synchronizing signals are aligned, and the phases are combined and recorded.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the present invention.
In the figure, reference numeral 1 denotes a camera which is imaged by a standard horizontal synchronizing signal and a standard vertical synchronizing signal shown in FIG. 2 (a), and outputs a standard composite signal, and 2 is a camera shown in FIG. 2 (b). 1 of the vertical synchronization signal period T of the camera 1
A camera which is imaged by a vertical synchronizing signal whose phase is delayed by / 3, and 3 is a vertical synchronizing signal whose phase is delayed by 2/3 of the vertical synchronizing signal period T of the camera 1 as shown in FIG. 2 (c). A camera for imaging by 4 is a delay circuit for delaying the phase of the input signal by ⅔ of the vertical synchronizing signal cycle T, and 5 is a delay circuit for delaying the phase of the input signal by ⅓ of the vertical synchronizing signal cycle T. A circuit, 6 is a combiner for combining the outputs of the delay circuits 4 and 5 and the output of the camera 3, and 7 is a recording device for recording the output signal of the combiner 6.

In the apparatus configured as described above, each camera simultaneously images the same subject, but the vertical sync signal of each camera is 1/3 of the cycle T of the vertical sync signal of the camera 1 as shown in FIG. Each one is late. And camera 1
Of the vertical synchronizing signal period T by the delay circuits 4 and 5, respectively.
After delaying the phase by 3, the output of each delay circuit and the output of the camera 3 are combined. Therefore, the camera 1,
The phases of the vertical signals in the output signals of 2 and 3 are synchronized.

Therefore, the output signal of the synthesizer 6 has different timings.
When a certain subject is changing, it is possible to see that the changes are sequentially superimposed on each other, and an image equivalent to that obtained by high-speed imaging is obtained.

In the above embodiment, an example in which three images are combined has been described, but if the number of cameras is adjusted and the delay amount of the synchronization signal is also adapted to that number, an image in which an arbitrary number of screens are combined is combined. Is obtained.

〔The invention's effect〕

As described above, according to the present invention, the images taken by the n cameras with the vertical synchronizing signals sequentially having different timings are combined, so that an image similar to that obtained by high-speed imaging is obtained, and an image of a changing subject is obtained. It has the effect of being suitable for analysis.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a waveform diagram showing a waveform of a vertical synchronizing signal used in each camera. 1,2,3 …… Camera, 4,5 …… Delay circuit, 6 …… Combiner, 7
…… Recording device.

Claims (1)

[Claims] 1. A first camera imaged by a first vertical synchronizing signal and a phase delay amount of 1 / n (n) with respect to the first vertical synchronizing signal.
Is a positive integer) The second to nth cameras imaged by the 2nd to nth vertical synchronization signals and the first camera to the (n-1) th camera are individually inserted into the delay amount. Is composed of a first to an (n-1) th delay circuits each of which decreases by 1 / n, a synthesis circuit that synthesizes each delay circuit output and an output of the nth camera, and a recording device that records the synthesis circuit output. A high-speed VTR device, wherein the first delay circuit has a delay amount of (n-1) / n.