JPH0583664A - Image reproducing/editing device - Google Patents

Abstract

PURPOSE:To record and reproduce the images at one time by using a semiconductor memory to a recording medium, selecting and reproducing simultaneously plural image reproducing points and recording the images after synthesizing them with the video signal levels changed. CONSTITUTION:A video input signal 11 is converted into a digital signal by a sampling data circuit 6 and then inputted to a digital video mixing circuit 2 via an input selection circuit 4 and an outer/inner image data selection circuit 5. Then the digital signal is once recorded to a semiconductor recording circuit 1. Then the recorded digital images are read out with accesses given to plural points of the circuit 1 and given to the inputs 1 and 2 of a mixing circuit 2 with proper control applied to an input selection circuit 3 and the circuit 5. The digital images are edited by a digital video mixing control circuit 7 with the video levels changed and recorded to the circuit 1. In such a constitution, the images can be recorded and reproduced at one time and at the same time such an image whose locus disappears as the time elapses can be easily edited.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reproducing / editing apparatus which uses a semiconductor memory as a recording medium and has an input / output port capable of simultaneously recording and reproducing an image.

[0002]

2. Description of the Related Art Conventionally, in this type of image reproducing / editing apparatus, the recording medium is often a sequential medium, and recording and reproducing of images are continuously executed. Moreover, recording and reproduction are performed at different times and using different devices, and it is impossible to perform them simultaneously.

Also, during image reproduction, since the recording and reproduction operations involve movements of mechanical parts, it is difficult to reproduce a still image, and only image reproduction within a certain range of speed, which is a constant speed, is possible. Therefore, in editing using a plurality of reproduced images, it is difficult to match each reproduction point.

[0004]

As described above, in the conventional image recording / reproducing / editing apparatus described above, it is impossible to record and reproduce images at the same time, and in order to reproduce the recorded contents, It is necessary to read sequentially. Therefore, there is a drawback that it is impossible to read out an arbitrary point in an instant. Further, since it includes a mechanical portion, there is a problem that a plurality of arbitrary points cannot be simultaneously read in parallel from the same recorded material. Therefore, it is difficult for the conventional image reproducing / editing apparatus to perform editing on the time axis based on the same material.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an image reproduction / editing apparatus capable of simultaneously recording and reproducing an image and accessing an arbitrary point. To aim.

[0006]

An image reproducing / editing apparatus according to the present invention comprises a semiconductor memory means capable of recording image data, an input / output means for simultaneously writing and reading an image to and from the semiconductor memory means, and It is characterized by having an image memory address generation circuit for simultaneously performing recording and reproduction and a control interface circuit for driving this memory address generation circuit by external address control data.

[0007]

In the present invention, since the semiconductor memory means is used as the recording medium, a plurality of image reproduction points are selected and reproduced at the same time, the video signal levels thereof are changed and combined, and then the semiconductor memory means is used. Can be recorded.
Therefore, it is possible to easily edit an image in which the locus disappears over time.

[0008]

Embodiments of the present invention will now be described with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an image reproducing / editing apparatus according to an embodiment of the present invention. The video input signal 11 from the outside is converted into a digital signal by the input image digital sampling circuit 6 and then input to the input selection switching circuit 4. Then, this digital video input signal is selectively input from the input selection circuit 4 to the external / internal image data selection circuit 5 or the write terminal W1 of the semiconductor recording circuit 1. In addition, the read terminal R0 of the semiconductor recording circuit 1,
R1 is connected to the external / internal image data selection circuit 5 via the input selection switching circuit 3. And this outside /
The internal image data selection circuit 5 is connected to the inputs 1 and 2 of the digital video mixing circuit 2. The output of the digital video mixing circuit 2 is the semiconductor recording circuit 1.
Is input to the write terminal W0.

The digital image written in the semiconductor recording circuit 1 can be taken out from the semiconductor recording circuit 1 through the plural image reading circuits 1A and 1B at the same time to extract arbitrary points of recorded contents. Separate image data is output as the image output signal of the semiconductor recording circuit 1, and the input selection circuit 3
And the external / internal image data selection circuit 5 are controlled to control the digital video mixing circuit 2
Different image data can be given to the input 1 and the input 2 of. The input selection circuit 3 selectively connects the external / internal image data selection circuit 5 and the digital / analog conversion circuit 10, and the image signal read from the semiconductor recording circuit 1 is the input selection circuit. By controlling 3, the D / A conversion circuit 10 is selectively input to the D / A conversion circuit 10.
After being converted into an analog signal by the A conversion circuit 10, it is output as an external video output signal 12.

The digital video mixing control circuit 7 is an external KEY signal / internal mixing signal switching circuit 8
Then, a control amount is applied to the digital video mixing circuit 2. Then, by changing this control amount, 2
The degree of image composition is controlled by two inputs 1 and 2.

In the image reproducing / editing apparatus thus constructed, the video input signal 11 input from the outside is converted into a digital signal by the sampling circuit 6, and then the input selecting circuit 4 and the external / internal image data selecting circuit. It is input to the digital video mixing circuit 2 via 5. Then, this image data is input from the mixing circuit 2 to the semiconductor recording circuit 1 and temporarily recorded.

As described above, the digital image once recorded is accessed at a plurality of points of the semiconductor recording circuit 1,
This is read, and the input selection circuit 3 and the external / internal image data selection circuit 5 are appropriately controlled and given to the input 1 and the input 2 to the digital video mixing circuit 2. FIG. 2 shows the image data recorded in the semiconductor recording circuit 1, and FIG. 3 shows the operation of reading and editing this data. From the image data recorded as shown in FIG. 2, points A, B, C, D, E, ... Changing in time series are selected and the reproduced image signals 13 and 14 shown in FIG. 3 are read out. Then, in the video mixing circuit 2, a recorded image signal 15 is created from the reproduced image signals 13 and 14, and this is recorded in the semiconductor recording circuit 6. Then, the digital video mixing control circuit 7 sends A, B, C, D,
By controlling the video level at points E, ..., the video level can be changed and edited as shown in FIG. 4, and this can be recorded in the semiconductor recording circuit 1. By repeating this operation, the image can be edited by arbitrarily changing the video level.

As a result, for example, as shown in FIG.
It is possible to easily create an image in which the image moves and the locus disappears little by little over time.

[0015]

As described above, according to the present invention, the semiconductor memory is used as the image data recording medium, the recording circuit and the reproducing circuit are separately prepared, and the arbitrary points can be simultaneously accessed. By passing through a plurality of reproduction circuits, it is possible to combine images by changing their signal levels. Therefore, for example, there is an effect that an image in which the locus disappears over time can be easily created.

[Brief description of drawings]

FIG. 1 is a block diagram showing an image reproduction / editing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing recorded images in time series.

FIG. 3 is a block diagram showing an image editing processing operation in this embodiment.

FIG. 4 is a schematic diagram showing a video level after editing.

FIG. 5 is a schematic diagram showing a screen after editing.

[Explanation of symbols]

 1; semiconductor recording circuit 2; digital image mixing circuit 3, 4; input selection circuit 5; external / internal image data selection circuit 6; input image digital sampling circuit 7; digital image mixing control circuit 8; external / internal mixing signal switching circuit 9; External control panel 10; Digital / analog conversion circuit 11; External video input signal 12; External video output signal 13, 14; Reproduced image signal 15; Recorded image signal

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Claims (1)

[Claims] 1. A semiconductor memory means capable of recording image data, an input / output means for simultaneously writing and reading an image to and from the semiconductor memory means, and an image memory address generation circuit for simultaneously operating recording and reproduction of an image. An image reproducing / editing apparatus comprising: a control interface circuit for driving the memory address generating circuit by external address control data.