JPH08294003A - Method for transmission of video picture - Google Patents

Abstract

PURPOSE: To provide the video picture transmission method in which the effect of an error during transmission is reduced. CONSTITUTION: When an image processing unit 13 of a transmission section 10 multiplies a pseudo noise image pattern outputted from a pseudo noise state image pattern generator 12 with an original image received externally and sends the product via a transmission display device 11, a reception section 20 takes correlation between an image received via an optical image forming system 21 and an image pickup device 22 with a pseudo noise state image pattern outputted from a pseudo noise state image pattern generator 23 to reproduce the image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video picture transmission method for spatially transmitting an image signal, and more particularly to a video picture transmission method capable of reducing the influence of transmission errors.

[0002]

2. Description of the Related Art A conventional video picture transmission method will be described with reference to FIGS. FIG. 14 is a configuration block diagram of a conventional optical transmission device, and FIG. 15 is a configuration block diagram of a conventional video picture transmission device.

As shown in FIG. 14, a conventional optical transmission device uses spatial light as a transmission medium to transmit information. A time-series serial signal is converted from an electrical signal by an electrical / optical conversion device 1. The optical / electrical conversion device 2 receives the optical signal, converts it into an electric signal, and outputs it as a serial signal.

However, in the spatial light transmission as shown in FIG. 14, a high-speed information transmission technique is required to transmit a large amount of information such as image information.

Therefore, as a method of transmitting a large amount of information such as image information at a low speed, there is a video picture transmission method using a system as shown in FIG. As shown in FIG. 15, a conventional video picture transmission device includes a transmission unit 10 'having a transmission display 11 for transmitting image information,
Optical imaging system 2 for receiving image information from a transmission path and forming an image
1 and an image pickup device 22 for reproducing a transmission image from the output from the optical imaging system 21.

Next, a transmission method in the conventional video picture transmission device will be described. When the image signal is transmitted from the transmission display 11 by the transmission unit 10 ', the image information is formed by the optical image formation system 21 of the reception unit 20', and the transmission image is reproduced and output by the image pickup device 22. is there.

According to this transmission method in the conventional video picture transmission device, a large amount of image information such as moving image information can be transmitted at a low modulation speed within the range where direct light can be transmitted. is there.

[0008]

However, the above-described conventional video picture transmission method has a problem that image information is deteriorated when ambient light is mixed in the transmission path or an obstacle is present. It was

Further, in the above-mentioned conventional video picture transmission method, it is difficult to apply various control methods such as error correction used in the serial transmission method shown in FIG. 14, and it is possible to reduce errors during transmission. There was a problem that it could not be planned.

The present invention has been made in view of the above circumstances, and the transmission side transmits the image information by diffusing the image information spatially or temporally and the receiving side restores the diffused image information. An object of the present invention is to provide a video picture transmission method capable of reducing the influence of errors on the way and ensuring stable transmission of image information.

[0011]

The invention according to claim 1 for solving the problems of the above-mentioned conventional example is a video picture transmission method, wherein an original image on the transmitting side is multiplied by an image pattern which becomes pseudo noise. A feature is that the image is reproduced by transmitting and removing the image pattern from the received image on the receiving side.

The invention according to claim 2 for solving the problems of the above-mentioned conventional example is a video picture transmission method,
It is characterized in that an image pattern which becomes pseudo-noise is changed in time series and is multiplied by an original image on the transmitting side to be transmitted, and the image pattern is reproduced on the receiving side by removing the image pattern from the received image.

The invention according to claim 3 for solving the above-mentioned problems of the prior art is a video picture transmission method,
The original image of the transmitting side is divided into a plurality of divided screens, and the divided images are exchanged for transmission, and the divided screen of the received image is exchanged on the receiving side in the reverse order of the exchange on the transmitting side to reproduce the image. I am trying.

The invention according to claim 4 for solving the problems of the above-mentioned conventional example is a video picture transmission method,
The original image on the sending side is divided into multiple split screens, the swapping pattern is changed in time series, the swapping is performed according to the swapping pattern at the time of sending, and the split screen of the received image is sent on the sending side. The feature is that the image is reproduced by performing the reverse exchange to the exchange at the time of transmission.

The invention according to claim 5 for solving the above-mentioned problems of the conventional example is a video picture transmitting method,
It is characterized in that the video picture transmission method according to claims 1 and 2 and the video picture transmission method according to claims 3 and 4 are selectively combined.

[0016]

According to the first and second aspects of the present invention, the original image is multiplied by a specific or time-sequential image pattern that becomes pseudo noise and transmitted, and the image pattern is removed from the received image to obtain an image. Since the video picture transmission method for reproducing is used, the influence of errors during transmission can be reduced by spreading the original image spatially or temporally.

According to the third and fourth aspects of the present invention, the original image is divided into divided screens, and the original image is exchanged and transmitted in accordance with a specific or time-series exchange pattern, and the received image has the same arrangement as the original image. Since the video picture transmission method is performed in which the images are reproduced by performing the switching so that the original images are spatially or temporally diffused, the influence of errors during transmission can be reduced.

According to the invention of claim 5, claim 1,
Since the video picture transmission method in which the method 2 and the methods of claims 3 and 4 are selectively combined is used, the influence of an error during transmission can be reduced by spreading the original image spatially or temporally.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. A video picture transmission method according to an embodiment of the present invention is designed such that a transmitting side intentionally multiplies an original image by a pseudo-noise-like image pattern and transmits the original image, and the receiving side eliminates noise during transmission along with the pseudo-noise-like image. Noise is dispersed during transmission by removing the original image, dividing the original image on the transmitting side, rearranging the original image and transmitting it, and recombining the original image on the receiving side.

A concrete video picture transmission method will be described with reference to the first to fifth embodiments. The outline of the video picture transmission method of the first embodiment is as follows. The transmitting side multiplies an original image by a pseudo-noise-like image pattern for transmission, and the receiving side transmits a pseudo-noise-like image similar to the pseudo-noise-like image pattern on the transmitting side. The original image is reproduced by taking a spatial correlation using a pattern.

The outline of the video picture transmission method of the second embodiment is as follows. The pseudo noise-like image pattern in the first embodiment is time-sequentially changed on the transmitting side, and the original image is multiplied and transmitted. However, the original image is reproduced by taking a spatial and temporal correlation using a pseudo noise-like image pattern that has been changed in the same manner as time-series on the transmitting side.

The outline of the video picture transmission method of the third embodiment is as follows. The transmitting side divides the original image into a plurality of divided screens, the positions of the divided divided screens are replaced in a pseudo-random manner, and then the receiving side transmits. The original image is reproduced by spatially performing the reverse exchange to the pseudo random state on the transmission side.

The outline of the video picture transmission method of the fourth embodiment is as follows. The pseudo-random switching in the third embodiment is changed and transmitted in time series, and the receiving side and the transmitting side also change in time series. The original image is reproduced by spatially and temporally performing the exchange opposite to the pseudo-random state.

The outline of the video picture transmission method of the fifth embodiment is as follows: the transmission method combining the first embodiment and the third embodiment, or the combination of the first embodiment and the fourth embodiment. Transmission method, transmission method combining the second and third embodiments, or second and fourth embodiments
The transmission method is a combination of the above embodiments.

A first embodiment according to the present invention will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 1 is a block diagram of the configuration of a video picture transmission device that implements the video picture transmission method of the first embodiment. It should be noted that portions having the same configurations as those in FIG. 2 is an explanatory diagram showing an example of an original image transmitted in the first embodiment, and FIG. 3 is an explanation showing a pseudo-noise-like image pattern used on the transmission side in the first embodiment. FIG. 4, FIG.
6 is an explanatory diagram showing an example of a transmission image processed in the first embodiment, and FIG. 5 is an explanatory diagram showing a pseudo-noise-like image pattern used on the receiving side of the first embodiment, and FIG. Is the first
FIG. 7 is an explanatory diagram showing an example of a restored image reproduced on the receiving side in the embodiment of FIG.

As shown in FIG. 1, the video picture transmission apparatus of the first embodiment is basically composed of a transmission section 10 and a reception section 20, and the transmission section 10 has a transmission display 11 and pseudo noise. Image pattern generator 12 and an image processing device 13, and the receiving unit 20 includes an optical imaging system 21.
An imaging device 22 and a pseudo-noise-like image pattern generator 2
3 and the image processing device 24.

Next, each part of the video picture transmission apparatus of the first embodiment will be concretely described. The transmission display 11 of the transmission unit 10 emits an image to be transmitted toward the reception unit 20, and is similar to a conventional device.

The pseudo-noise-like image pattern generator 12 divides the screen having the same size as the original image into a plurality of parts, and makes a part of the divided screen a pseudo-noise-like image, as shown in FIG. The pseudo noise image pattern is output to the image processing device 13. In addition, in FIG.
The gray part contains constant noise information.

The image processing device 13 receives the image signal of the original image, converts the image signal from analog to digital, stores the original image as shown in FIG. 2 in the internal image memory, and stores the original image of FIG. The transmission image shown in FIG. 4 is formed by multiplying the image and the pseudo-noise-like image pattern shown in FIG. 3, and is converted from digital to analog and output to the transmission display 11. Therefore, the image processing apparatus 13 is provided with an image memory (simply called a memory) for storing an original image, a memory for storing a pseudo noise-like image pattern, and a memory for storing a transmission image as a result of multiplication. ing.

In the multiplication in the image processing device 13, the transmission display 11 is such that the gray portion in FIG. 3 is the character portion of the original image and the background color as it is.
The white portion in FIG. 3 is the one in which the original image is inverted in black and white and is emitted by the transmission display 11.

The optical image forming system 21 of the receiving section 20 forms a transmission image in the same manner as the conventional one, and the image pickup device 22 also picks up and reproduces the received image in the same manner as the conventional one. is there.

As shown in FIG. 5, the pseudo-noise-like image pattern generator 23 outputs a pseudo-noise-like image pattern similar to that of the pseudo-noise-like image pattern generator 12 of the transmitter 10 to the image processing device 24. is there.

The image processing device 24 converts the received image output from the image pickup device 22 from analog to digital, temporarily stores it in the internal image memory, and obtains it from the pseudo noise-like image pattern generator 23 shown in FIG. An image is reproduced by taking a correlation with a noise-like image pattern, converted from digital to analog, and a reproduced image signal is output. Therefore, in the image processing device 24, a memory for storing the received image,
A memory for storing the pseudo noise image pattern and a memory for storing the reproduced image are provided.

Here, taking the correlation means that the gray portion in FIG. 5 is the character portion of “A” of the received image (the image similar to that of FIG. 4) and the background like the multiplication performed in the transmission unit 10. The color is the same as it is, and the white portion in FIG. 5 is a shape obtained by inverting the received image in black and white.
Since the correlation in the video picture transmission apparatus and the transmission method thereof according to the first embodiment can be said to be the correlation in spatial transmission, the correlation according to the first embodiment can be called spatial correlation.

Next, a transmission method in the video picture transmission apparatus of the first embodiment will be described with reference to FIG. The image processing device 13 of the transmission unit 10 converts the image signal of the original image input from the outside into the digital form from analog and stores the original image data in the first memory, and further, from the pseudo noise image pattern generator 12. The output pseudo noise image pattern is stored in the second memory. Then, the transmission image (see FIG. 4) is stored in the third memory by multiplying the original image in the first memory (see FIG. 2) and the pseudo noise-like image pattern in the second memory (see FIG. 3). , The transmission image is converted from digital to analog and output to the transmission display 11. The transmission display 11 emits the input transmission image and outputs the transmission image to the reception unit 20 for transmission.

The optical image forming system 21 of the receiving section 20 forms an image of the received signal, the image pickup device 22 picks up the image, and outputs the signal to the image processing device 24. Then, the image processing device 24 converts the input signal from analog to digital and stores it in the first memory, and further, the pseudo noise image pattern generator 23.
The pseudo noise-like image pattern output from is stored in the second memory. Then, the received image of the first memory (similar to FIG. 4) and the pseudo noise-like image pattern of the second memory (FIG. 5).
Reconstructed image (Fig. 6)
The reference image is stored in the third memory, the restored image is converted from digital to analog, and the reproduced image signal is output to the outside.

According to the video picture transmission apparatus and the transmission method thereof of the first embodiment, the original image is multiplied by the pseudo-noise-like image pattern, spatially diffused and transmitted, and the pseudo-noise-like image is received at the receiving side. By performing spatial correlation to remove patterns, even if noise is generated due to ambient light or obstacles mixed in during transmission, if the noise-like screen of the pseudo-noise-like image pattern produces a spatial correlation Since the noise and the pseudo noise are removed, the effect of the obstacle over a wide range can be reduced.

Next, a video picture transmission apparatus for realizing the video picture transmission method of the second embodiment will be described with reference to FIG.
Use to explain. FIG. 7 is a block diagram of the configuration of a video picture transmission device that implements the video picture transmission method of the second embodiment. It should be noted that parts having the same configurations as those in FIG.

As shown in FIG. 7, the video picture transmitting apparatus of the second embodiment has the same parts as the video picture transmitting apparatus of the first embodiment, that is, the transmission display 11 in the transmitting unit 10 and the image. The processing device 13, the optical imaging system 21 in the receiving unit 20, the imaging device 22, and the image processing device 2
As a characteristic part of the second embodiment, a time-sequential pseudo-noise-like image pattern generator 14 is provided in the transmitter 10 instead of the pseudo-noise-like image pattern generator 12 of the first embodiment. Is provided in place of the pseudo-noise-like image pattern generator 23 in the receiving section 20, and a time-series pseudo-noise-like image pattern generator 26 is provided in the receiving section 20.
A pattern synchronizer 25 is newly provided therein.

Next, each part of the video picture transmission apparatus of the second embodiment will be described, but the description of the same components as those of the video picture transmission apparatus of the first embodiment will be omitted, and that of the second embodiment will be omitted. The characteristic part will be specifically described.

The time-sequential pseudo-noise-like image pattern generator 14 outputs the pseudo-noise-like image pattern to be multiplied with the original image to the image processing device 13 while changing (switching) it in time series. Is. Specifically, the time-sequential pseudo-noise-like image pattern generator 14 includes a storage unit that stores therein a plurality of pseudo-noise-like image patterns, and a timer. The pseudo noise image pattern stored in advance is output at time intervals to the image processing device 13 while being switched in time series.

The time-series pseudo-noise-like image pattern generator 26 of the receiving unit 20 has a storage unit for storing a plurality of pseudo-noise-like image patterns therein, and follows a switching instruction from the pattern synchronizer 25 described later. , While switching the pseudo-noise-like image patterns stored in advance in time series,
The image is output to the image processing device 24.

The pseudo-noise-like image pattern stored in the time-series pseudo-noise-like image pattern generator 26 of the receiver 20 is stored in the time-series pseudo-noise-like image pattern generator 14 of the transmitter 10. The pseudo-noise-like image pattern is the same as that shown in FIG. Using the same pseudo-noise-like image pattern as the pseudo-noise-like image pattern
The correlation is set to 4.

The pattern synchronizer 25 includes an optical imaging system 21.
The image signal of the received image picked up by the image pickup device 22 is input via the, and the timing at which the pseudo noise-like image pattern is switched in the transmitting unit 10 is detected, and the time-series pseudo noise-like image pattern generator 26 is detected. The switching instruction is output to.

Next, a transmission method in the video picture transmission apparatus of the second embodiment will be described with reference to FIG. In the video picture transmission apparatus according to the second embodiment, the time-series pseudo-noise-like image pattern generator 14 of the transmission unit 10 outputs the pseudo-noise-like image pattern switched in time series at a constant time interval to the image processing apparatus 13. To do. The image processing device 13
Is the same as in the first embodiment, the image signal of the original image input from the outside is converted from analog to digital and the original image data is stored in the first memory. The pseudo noise-like image pattern switched in time series, which is output from the generator 14, is stored in the second memory. Then, the transmission image is stored in the third memory by multiplying the original image of the first memory by the pseudo-noise-like image pattern of the second memory, and the transmission image is converted from digital to analog to be displayed on the transmission. Output to 11.

Then, the transmission display 11 emits the input transmission image as in the first embodiment and outputs the transmission image to the reception section 20. In the reception section 20, the optical imaging system 21 combines the reception signals. The image pickup device 22 picks up the image and outputs the signal to the image processing device 24. At the same time, the image pickup device 22 features the picked-up image signal in the pattern synchronization device 2 as a feature of the second embodiment.
Output to 5.

At this time, when the pattern synchronization device 25 detects the timing at which the pseudo-noise-like image pattern multiplied by the transmission section 10 is switched from the image signal output from the image pickup device 22, the time-sequential pseudo-noise-like pattern is detected. A switching instruction is output to the image pattern generator 26, and the time-sequential pseudo-noise-like image pattern generator 26 switches the pseudo-noise-like image pattern in accordance with the switching instruction received from the pattern synchronizer 25, and the image processor 24 receives the pseudo-noise. A pattern image pattern is output.

Then, the image processing device 24 converts the image signal input by the image pickup device 22 from analog to digital and stores it in the first memory, as in the first embodiment, and further, in a time-series pseudo manner. The pseudo noise-like image pattern output from the noise-like image pattern generator 26 is stored in the second memory. Then, the restored image reproduced by taking the spatial and temporal correlation between the received image of the first memory and the pseudo noise-like image pattern of the second memory is stored in the third memory,
The restored image is converted from digital to analog and the reproduced image signal is output to the outside.

According to the video picture transmission apparatus of the second embodiment, the pseudo noise-like image pattern that changes in time series is multiplied on the transmission unit 10 side with the original image to perform spatial and temporal diffusion, and then transmit. Then, on the receiving unit 20 side, the original image is reproduced by taking a spatial and temporal correlation using the pseudo noise-like image pattern changed in the same manner as the time series on the transmitting side. Even if noise is generated by ambient light or obstacles mixed in during transmission, some of the noise is removed,
Furthermore, by changing the position of the error portion that cannot be removed in time series, there is an effect that a steady transmission error can be spread over the time frequency and the influence of the obstacle over a wide range can be reduced.

Next, a video picture transmission apparatus for realizing the video picture transmission method of the third embodiment will be described with reference to FIG.
~ It demonstrates using FIG. FIG. 8 is a block diagram showing the configuration of a video picture transmission device that implements the video picture transmission method of the third embodiment. It should be noted that parts having the same configurations as those in FIG. 9 is an explanatory diagram showing an example of a split screen of an original image transmitted in the third embodiment, and FIG. 10 is an explanatory diagram showing an example of a split screen replaced in the third embodiment. Yes, in FIG.
It is explanatory drawing which shows the example of the split screen reproduced on the receiving side of the 3rd Example. 9 to 11 show an example in which one screen is divided into 16 parts.

As shown in FIG. 8, the video picture transmission apparatus for realizing the video picture transmission method of the third embodiment has the same unit as that of the video picture transmission apparatus of the first embodiment in the transmission unit 10. A transmission display 11,
The image processing device 13 'and the optical imaging system 21 in the receiving unit 20.
The image pickup device 22 and the image processing device 24 'are provided. Further, as a characteristic part of the third embodiment, instead of the pseudo noise image pattern generator 12 of the first embodiment in the transmitter 10, A replacement pattern data generator 15 is provided, and a replacement pattern data generator 27 is provided in the receiving unit 20 instead of the pseudo noise image pattern generator 23.
The processing content of the image processing apparatus 13 'is different from that of the image processing apparatus 13 of the first embodiment, and the processing content of the image processing apparatus 24' is also different from that of the image processing apparatus 24 of the first embodiment. Is different.

Next, each part of the video picture transmission apparatus of the third embodiment will be described, but the description of the same components as those of the video picture transmission apparatus of the first embodiment will be omitted, and that of the third embodiment will be omitted. The characteristic part will be specifically described.

Replacement pattern data generator 1 of transmitter 10
Reference numeral 5 is for outputting replacement pattern data for replacing the divided screens obtained by dividing the original image into a plurality of images to the image processing device 13 ′, and the replacement pattern data is set in the replacement pattern data generator 15 in advance.

Further, the replacement pattern data generator 27 of the receiving section 20 outputs replacement pattern data for returning the received divided screens to the original order to the image processing device 24 '. It should be noted that the replacement pattern data of the replacement pattern data generator 27 is an operation for performing the reverse replacement operation of the replacement pattern data set in the replacement pattern data generator 15 of the transmission unit 10, and is preset. .

The image processing device 13 'receives an image signal of an original image, converts the image signal from analog to digital, stores the original image in an internal image memory, and stores a plurality of original images as shown in FIG. The divided image is divided into a plurality of divided screens, and the replacement image is pseudo-randomly replaced according to the replacement pattern data output from the replacement pattern data generator 27 to create a replacement image as shown in FIG. 10, and the replacement image is converted from digital to analog and transmitted. It is output to the display 11 for display. Therefore, the image processing apparatus 13 'is provided with an image memory (simply referred to as a memory) for storing the original image and a memory for storing the transmission image resulting from the replacement.

The image processing device 24 'converts the received image output from the image pickup device 22 from analog to digital,
Once stored in the internal image memory, according to the replacement pattern data output from the replacement pattern data generator 27,
The divided image obtained by dividing the received image into a plurality of parts is replaced in a pseudo-random manner to reproduce the image as shown in FIG. 11, the digital image is converted into the analog image, and the reproduced image signal is output. Therefore, the image processing device 24 'is provided with a memory for storing the received image and a memory for storing the reproduced image.

Next, a transmission method in the video picture transmission apparatus of the third embodiment will be described with reference to FIG. In the video picture transmission apparatus of the third embodiment, the replacement pattern data generator 15 of the transmitter 10 outputs the preset replacement pattern data to the image processing apparatus 13 '. Then, in the image processing apparatus 13 ', the image signal of the original image input from the outside is converted from analog to digital, the original image data is stored in the first memory, and the divided screen obtained by dividing the original image data is replaced with the replacement pattern data. The replacement image (see FIG. 10) is pseudo-randomly switched according to the replacement pattern data output from the generator 15, the replacement image is stored in the second memory, and the replacement image is converted from digital to analog and output to the transmission display 11. To do.

Then, the transmission display 11 emits the input transmission image as in the first embodiment and outputs and transmits it to the reception unit 20, where the optical imaging system 21 connects the reception signals. The image is taken by the image pickup device 22, and the signal is output to the image processing device 24 '.

At this time, in the replacement pattern data generator 27, the replacement pattern data for performing the replacement operation which is the reverse of the replacement in the preset transmission section 10 is processed by the image processing apparatus 2.
Output to 4 '. Then, in the image processing device 24 ′, the image signal of the received image input by the image pickup device 22 is converted from analog to digital and stored in the first memory, and according to the replacement pattern data output from the replacement pattern data generator 27. , Reproduced image in which the received image is divided into a plurality of divided screens and pseudo-randomly replaced (see FIG. 11)
Is stored in the second memory, the reproduced image is converted from digital to analog, and the reproduced image signal is output to the outside.

Although FIGS. 9 to 11 show an example in which one screen is divided into 16 parts, the number of divisions is arbitrary.

According to the video picture transmitting apparatus of the third embodiment, the transmitting unit 10 divides the original image into a plurality of divided screens, and the divided screens are output according to the replacement pattern data output from the replacement pattern data generator 15. Pseudo-randomly replaces and transmits, and the receiving side performs the reverse operation of the split screen replacement performed on the sending side on the received image to play back the original image, so multiple split screens are displayed on the screen. By spreading continuous transmission errors across the entire image, that is, by spreading over a wide spatial frequency band on the image,
This has the effect of reducing the influence of transmission errors.

Next, a video picture transmission apparatus for realizing the video picture transmission method of the fourth embodiment will be described with reference to FIG.
Use 2 to explain. FIG. 12 is a block diagram of the configuration of a video picture transmission device that realizes the video picture transmission method of the fourth embodiment. It should be noted that portions having the same configurations as those in FIG.

As shown in FIG. 12, the video picture transmitting apparatus for implementing the video picture transmitting method of the fourth embodiment is similar to the video picture transmitting apparatus of the third embodiment in the transmitting unit 10. A transmission display 11,
The image processing device 13 'and the optical imaging system 21 in the receiving unit 20.
, An image pickup device 22 and an image processing device 24 '. Further, as a characteristic part of the fourth embodiment, a time series is provided in the transmission unit 10 instead of the replacement pattern data generator 15 of the third embodiment. A replacement pattern data generator 16 is provided, a time-series replacement pattern data generator 28 is provided in the receiving unit 20 in place of the replacement pattern data generator 27 of the third embodiment, and further in the receiving unit 20. Further, a pattern synchronizer 25 is newly provided.

Next, each part of the video picture transmission apparatus of the fourth embodiment will be described, but the description of the same components as those of the video picture transmission apparatus of the third embodiment will be omitted, and that of the fourth embodiment will be omitted. The characteristic part will be described in detail.

The time-series replacement pattern data generator 16 of the transmission unit 10 outputs the replacement pattern data for rearranging the divided screens obtained by dividing the original image to the image processing device 13 'while changing (switching) them in time series. To do.
Specifically, the time-series replacement pattern data generator 16 includes a storage unit for storing a plurality of replacement pattern data therein, and a timer. By counting time with the timer, the replacement pattern data generator 16 can be preset at predetermined time intervals. The stored replacement pattern data is output to the image processing device 13 'while being switched in time series.

Further, the time-series replacement pattern data generator 28 of the receiving section 20 is provided with a storage section for storing a plurality of replacement pattern data therein, and in advance in accordance with a switching instruction from the pattern synchronization device 25 described later. The stored replacement pattern data is output to the image processing device 24 'while being switched in time series. The replacement pattern data stored in the time-series replacement pattern data generator 28 of the receiver 20 corresponds to the replacement pattern data stored in the time-series replacement pattern data generator 16 of the transmitter 10. And the image processing device 1
3'is replacement pattern data for performing a replacement operation that is the reverse of the replacement pattern data used to replace the split screen.

The pattern synchronizer 25 includes an optical imaging system 21.
The timing at which the replacement pattern data used in the image processing device 13 ′ of the transmission unit 10 is switched is detected from the image signal captured by the imaging device 22 via the, and the time-series replacement pattern data generator 28 is instructed to switch. Is output.

Next, the transmission method in the video picture transmission apparatus of the fourth embodiment will be described with reference to FIG. 12, focusing on the differences from the third embodiment. In the video picture transmission apparatus of the fourth embodiment, the time-series replacement pattern data generator 16 outputs the replacement pattern data switched in time series at a constant time interval to the image processing apparatus 13 '.
Then, in the image processing apparatus 13 ', as in the third embodiment, the image signal of the original image input from the outside is converted from analog to digital and the original image data is stored in the first memory. Pseudo-randomly replace the divided screen according to the replacement pattern data output from the time-series replacement pattern data generator 16, store the replacement image (see FIG. 10) in the second memory, and digitally store the replacement image. To analog and output to the transmission display 11. That is, the difference from the third embodiment is that the replacement pattern data used in the image processing apparatus 13 'changes (switches) in time series.

Then, the transmission display 11 emits the input transmission image as in the third embodiment, and outputs and transmits it to the receiving section 20. In the receiving section 20, the optical imaging system 21 combines the received signals. The image pickup device 22 picks up an image and outputs the signal to the image processing device 24 ', and at the same time, the image pickup device 22 outputs the picked-up signal to the pattern synchronization device 25 as a feature of the second embodiment.

At this time, when the pattern synchronization device 25 detects the timing at which the replacement pattern data used for the replacement of the divided screens in the transmission unit 10 is switched from the image signal output from the image pickup device 22, the pattern synchronization device 25 performs time series. A switching instruction is output to the replacement pattern data generator 28. When the time-series replacement pattern data generator 28 receives the switching instruction from the pattern synchronization device 25, the replacement pattern data is switched and the replacement pattern data is sent to the image processing device 24 '. (It is the replacement pattern data that is the replacement operation opposite to the replacement operation of the replacement pattern data generated by the time-series replacement pattern data generator 16).

Then, as in the third embodiment, the image processing device 24 'converts the image signal of the received image input by the image pickup device 22 from analog to digital, stores it in the first memory, and replaces it. According to the replacement pattern data output from the pattern data generator 27, a reproduced image obtained by pseudo-randomly replacing a divided screen obtained by dividing the received image is stored in the second memory, and the reproduced image is converted from digital to analog. Then, the reproduced image signal is output to the outside. That is, the difference from the third embodiment is that the replacement pattern data used in the image processing device 24 'changes (switches) in time series.

According to the video picture transmission apparatus of the fourth embodiment, the transmission image is divided into a plurality of divided screens on the side of the transmission unit 10, and the divided screens are pseudo-randomly distributed in accordance with the replacement pattern data for switching the divided screens in time series. On the other hand, on the other hand, on the receiving side, the original image is reproduced by performing the reverse exchange operation of the exchange pattern data used in the transmitting section 10, so that it may be spread over a plurality of divided screens on the screen. By spreading the continuous transmission error over the entire image and changing the position where the transmission error occurs in time series, the transmission error such as the influence of stationary interference light is spread on the spatial frequency and the time frequency, This has the effect of reducing the effects of transmission errors.

Next, a video picture transmission method of the fifth embodiment will be described. The video picture transmission method of the fifth embodiment is a method in which the video picture transmission methods of the first to fourth embodiments described so far are combined, and here, as an example thereof, the second embodiment and the third embodiment. A video picture transmission method in combination with the example will be described.

In the video picture transmission method of the fifth embodiment, the original image is divided and replaced on the transmitter side as in the third embodiment, and further switched in time series as in the second embodiment. The pseudo-noise-like image pattern is transmitted after being multiplied by the pseudo-noise-like image pattern, and the pseudo-noise-like image pattern synchronized with the transmitter is used to correlate the received image on the receiving side, as in the second embodiment. This is a method of reproducing the original image by performing the reverse exchange operation on the side of the transmitting unit as in the third embodiment.

Next, a video picture transmission apparatus for realizing the video picture transmission method of the fifth embodiment will be described with reference to FIG.
Use 3 for explanation. FIG. 13 is a block diagram of the configuration of a video picture transmission device that realizes the video picture transmission method of the fifth embodiment. It should be noted that parts having the same configurations as those in FIGS. 7 and 8 will be described with the same reference numerals.

As shown in FIG. 13, the video picture transmitting apparatus for realizing the video picture transmitting method of the fifth embodiment has a transmitting section as a common part with the video picture transmitting apparatus of the first to fourth embodiments. Transmission display 1 in 10
1, an optical imaging system 21 in the receiving unit 20, and an imaging device 22
Further, as a part similar to the second embodiment, a time series pseudo noise image pattern generator 14 is provided in the transmission unit 10, a pattern synchronization device 25 and a time series in the reception unit 20. And a pseudo-noise-like image pattern generator 26, and as a part similar to the third embodiment,
A replacement pattern data generator 15 is provided in the transmission unit 10, and a replacement pattern data generator 27 is provided in the reception unit 20. Further, as a characteristic part of the fifth embodiment, an image processing device 13 ″ in the transmitting unit 10 and an image processing device 24 ″ in the receiving unit 20 are provided.

Next, each part of the video picture transmission device of the fifth embodiment will be described, but the description of the same components as those of the video picture transmission devices of the second and third embodiments will be omitted and the fifth embodiment will be omitted. The characteristic part of the embodiment will be described in detail.

The image processing device 13 ″ receives the image signal of the original image and uses four memories for storing the image data of one screen, and pseudo-randomly replaces the divided screen obtained by dividing the original image into a plurality of parts. Further, a pseudo noise-like image pattern that is switched in time series is multiplied to create a transmission image, and the transmission image is converted from digital to analog and output to the transmission display 11.

Specifically, the replacement pattern output from the replacement pattern data generator 15 is obtained by converting an image signal of an original image input from the outside into an analog signal and storing the original image data in the first memory. 1st according to the data
The image data is read from the memory and stored in the second memory while replacing the split screen. On the other hand, the pseudo-noise-like image pattern output from the time-series pseudo-noise-like image pattern generator 14 is stored in the third memory, and the second noise is stored in the second memory.
Image data stored in the third memory and the pseudo-noise-like image pattern stored in the third memory are stored in the fourth memory to create an image for transmission. The image data of the image for transmission is converted from digital to analog and is output to the display 11 for transmission.

The image processing device 24 'uses four memories capable of storing image data for one screen and correlates the received image with the pseudo noise image pattern which is switched in synchronization with the transmitting side. An image is reproduced by performing a switching operation opposite to that on the transmitting side on the further divided screen.
Specifically, the image signal input by the imaging device 22 is converted from analog to digital, stored in the first memory, and output from the time-series pseudo-noise-like image pattern generator 26. Stored in the second memory, and the image data stored in the first memory,
The image data correlated with the pseudo noise-like image pattern stored in the second memory is stored in the third memory, and the image stored in the third memory is further divided into a plurality of images. The reproduced image in which the divided screens are pseudo-randomly replaced and restored by the replacement operation opposite to the replacement operation performed by the image processing device 13 ″ is stored in the fourth memory, and the image data of the reproduced image is digitally converted. It is converted to analog and output to the outside.

Next, a transmission method in the video picture transmission apparatus of the fifth embodiment will be described with reference to FIG. Fifth
In the video picture transmission apparatus of the above embodiment, the replacement pattern data generator 15 outputs preset replacement pattern data to the image processing device 13 ″, and the time-series pseudo-noise-like image pattern generator 14 is fixed. The pseudo noise-like image pattern switched in time series at time intervals is output to the image processing device 13 ″.

In the image processing device 13 ″, the image signal of the original image input from the outside is converted into image data, and the divided screens divided into a plurality of parts are replaced according to the replacement pattern data output from the replacement pattern data generator 15. ,
Further, a pseudo-noise-like image pattern switched in time series outputted from the time-series pseudo-noise-like image pattern generator 14 is multiplied to create an image for transmission, and image data of the image for transmission is converted into an image signal. And is output to the transmission display 11.

Then, the transmission display 11 emits the input transmission image as in the second and third embodiments, outputs the transmission image to the reception unit 20, and the reception unit 20 receives the optical image forming system 21. The signal is formed into an image, the image pickup device 22 picks up the image, and the signal is picked up by the image processing device 24 ″ and the pattern synchronization device 25.
Output to.

At this time, similarly to the second embodiment, the pattern synchronization device 25 determines the timing at which the pseudo noise image pattern multiplied by the transmitter 10 is switched from the image signal output from the image pickup device 22. When detected,
A switching instruction is output to the time-series pseudo-noise-like image pattern generator 26, and the time-series pseudo-noise-like image pattern generator 26 is output.
Then, the pseudo noise-like image pattern is switched according to the switching instruction received from the pattern synchronization device 25, and the pseudo noise-like image pattern is output to the image processing device 24 ″.

Then, the image processing device 24 ″ converts the image signal input by the image pickup device 22 into image data, and outputs the image data with the pseudo noise-like image pattern output from the time-series pseudo noise-like image pattern generator 26. Correlation is performed, and the screens divided according to the replacement pattern data output from the replacement pattern data generator 27 are replaced and reproduced,
The image data of the reproduced image is converted into an image signal and output to the outside.

In the fifth embodiment, the method of combining the video picture transmission method of the second embodiment and the video picture transmission method of the third embodiment has been described, but the first embodiment and the first embodiment are combined. The method of combining the third embodiment, the method of combining the second embodiment and the fourth embodiment, and the first
A method in which the above embodiment and the fourth embodiment are combined is also conceivable.

According to the video picture transmission apparatus of the fifth embodiment, the transmission image is divided into a plurality of divided screens on the side of the transmission unit 10 and is replaced at random in a pseudo random manner, and the pseudo noise state is switched in time series. The image is transmitted by being multiplied with the image pattern, and the receiving unit 20 side correlates the received image with a pseudo-noise-like image pattern that is switched in synchronization with the transmitting side, and reverses the split screen replacement performed on the transmitting side. Since the original image is reproduced by performing the replacement operation of, the continuous transmission error that spreads over multiple split screens on the screen is spread over the entire screen, and a part of the transmission error is removed or the transmission cannot be removed. By changing the error position in time series, the effect of transmission error can be reduced.

[0088]

According to the first and second aspects of the present invention, the original image is multiplied by a specific or time-sequentially changing image pattern which becomes pseudo noise, and the resultant image pattern is removed from the received image. Since the video picture transmission method is used to reproduce an image, the effect of errors during transmission can be reduced by spreading the original image spatially or temporally.

According to the third and fourth aspects of the invention, the original image is divided into the divided screens, and the original image is exchanged and transmitted in accordance with a specific or time-sequential exchange pattern, and the received image has the same arrangement as the original image. Since the video picture transmission method is performed in which the images are reproduced by performing the replacement so that the original images are spatially or temporally diffused, the effect of errors during transmission can be reduced.

According to the invention of claim 5, claim 1,
Since the video picture transmission method in which the method 2 and the methods of claims 3 and 4 are selectively combined is used, by spreading the original image spatially or temporally, the effect of error during transmission can be reduced. is there.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a video picture transmission apparatus that realizes a video picture transmission method of a first embodiment.

FIG. 2 is an explanatory diagram showing an example of an original image transmitted in the first embodiment.

FIG. 3 is an explanatory diagram showing a pseudo-noise-like image pattern used on the transmitting side according to the first embodiment.

FIG. 4 is an explanatory diagram showing an example of a transmission image processed in the first embodiment.

FIG. 5 is an explanatory diagram showing a pseudo-noise-like image pattern used on the receiving side of the first embodiment.

FIG. 6 is an explanatory diagram showing an example of a restored image reproduced on the receiving side in the first embodiment.

FIG. 7 is a configuration block diagram of a video picture transmission apparatus that realizes the video picture transmission method of the second embodiment.

FIG. 8 is a configuration block diagram of a video picture transmission apparatus that realizes a video picture transmission method according to a third embodiment.

FIG. 9 is an explanatory diagram showing an example of a split screen of an original image transmitted in the third embodiment.

FIG. 10 is an explanatory diagram showing an example of divided screens replaced in the third embodiment.

FIG. 11 is an explanatory diagram showing an example of a split screen reproduced on the receiving side according to the third embodiment.

FIG. 12 is a configuration block diagram of a video picture transmission device that realizes a video picture transmission method of a fourth embodiment.

[Fig. 13] Fig. 13 is a configuration block diagram of a video picture transmission device that realizes the video picture transmission method of the fifth embodiment.

FIG. 14 is a configuration block diagram of a conventional optical transmission device.

FIG. 15 is a configuration block diagram of a conventional video picture transmission device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electric / optical converter, 2 ... Optical / electrical converter, 1
0 ... Transmission unit, 11 ... Transmission display, 12, 2
3 ... Pseudo-noise-like image pattern generator, 13, 13 ',
13 ″, 24, 24 ′, 24 ″ ... Image processing device, 1
4, 26 ... Time-sequential pseudo-noise-like image pattern generator,
15, 27 ... Replacement pattern data generator, 16, 28 ...
Time-sequential replacement pattern data generator, 25 ... Pattern synchronizer

Claims (5)

[Claims] 1. A video picture transmission method, wherein an original image on the transmitting side is multiplied by an image pattern which becomes pseudo noise and transmitted, and the receiving side removes the image pattern from the received image and reproduces the image. . 2. An image pattern which becomes pseudo noise is changed in time series and is multiplied by an original image on the transmitting side and transmitted, and the image pattern is reproduced on the receiving side by removing the image pattern from the received image. Video picture transmission method. 3. The original image on the transmitting side is divided into a plurality of divided screens and exchanged for transmission, and the divided screen of the received image is exchanged on the receiving side in the reverse order of the exchange on the transmitting side to display the images. A method for transmitting a video picture, characterized by reproducing. 4. An original image on the transmitting side is divided into a plurality of divided screens, a replacement pattern is changed in time series, the replacement pattern is changed according to the replacement pattern at the time of transmission, and the image is transmitted. The method of transmitting a video picture is characterized in that the image is reproduced by performing an exchange opposite to the exchange at the time of transmission on the transmitting side. 5. A video picture transmission method, wherein the video picture transmission method according to claim 1 or 2 and the video picture transmission method according to claims 3 or 4 are selectively combined.