KR20010110589A - Method for transmitting and receiving video and text information using sound wave and apparatus thereof - Google Patents

Abstract

The present invention relates to a method and apparatus for transmitting and receiving images and texts, and more particularly, to a method for transmitting and receiving images and texts using a conventional wireless communication device for transmitting voice information. According to the method of the present invention, after modulating the video and text signal into an analog signal corresponding to the sound wave frequency, the video and text signals are loaded on a carrier of a general radio and transmitted to a remote site. It is characterized by converting the signal into a digital signal to display the original image and text.

Description

Method and apparatus for transmitting and receiving video and text information using sound waves

The present invention relates to a method and apparatus for transmitting and receiving images and texts, and more particularly, to a method and apparatus for transmitting and receiving images and texts using a conventional wireless communication device for transmitting voice information.

A radio communication device is a device that directly transmits a communication signal in the form of electromagnetic waves or reflects it to an ionospheric layer or communication satellite in the atmosphere to transmit and communicate. In wireless communication, information is loaded on a carrier through a process called modulation that changes the amplitude, frequency, and duration of the carrier. In amplitude modulation, the wave strength is modulated and transmitted with the sideband frequency on both sides of the lowest peak of the carrier. Frequency modulation, on the other hand, changes the frequency instead of amplitude and sends the necessary information from the transmitter to the receiver. Duration modulation is a simpler method that repeats transmitting, stopping, and retransmitting a constant tone for a period of time.

High frequency waves are used as carriers for relatively low frequency information. This operation is obtained by mixing the carrier signal with the low frequency signal to be transmitted. The synthesized wave resulting from this operation is called a modulated wave.

In general, the electrical signal is represented by the equation e = E cos (ωt + θ). By giving the amplitude E and the phase angle θ, the electric signal can be displayed completely. Modulation is an operation of changing any one of these three properties of the radio signal according to the signal of the voice frequency to be transmitted. The method of changing the amplitude of the radio frequency signal by the audible frequency signal is called amplitude modulation (AM), the frequency changing is frequency modulation (FM), and the phase angle is called phase modulation (PM).

In today's multimedia era, data such as numerous images and texts are transmitted. Usually, wired lines such as telephone lines or separate network lines or repeaters cannot be used to take advantage of wireless communication devices.

In addition, the video and data transmission equipment currently on the market had to be equipped with a separate transmission and receiver, or there was a problem of installing a line and a repeater. It is possible to infer that it would be more efficient to use military radios or telecommunication networks that you have.

This means that video and data transmission devices that are currently used via wired or repeaters may not be available when communication is disrupted. It also has to be very expensive in terms of installation costs.

Accordingly, an object of the present invention is to enable transmission and reception of video and text information using a general wireless communication device.

Another object of the present invention is to transmit and receive image and text information using a general wireless communication device to convert the information into sound waves.

Another object of the present invention is to encrypt the image and text information when transmitting and receiving using a general wireless communication device to maintain security.

In order to achieve the above object, the video and text information transmission / reception method of the present invention modulates the video and text signals into an analog signal corresponding to a sound wave frequency and then loads them on a carrier of a general radio and transmits them to a remote site. It is characterized by receiving a signal and converting the image and text signal carried on the carrier to a digital signal to display the original image and text.

In addition, the present invention, when converting the video signal from the digital signal to an analog sound wave signal, characterized in that the frequency band is 1,000 Hz to 1,400 Hz.

In addition, the present invention, when converting the text signal from the digital signal to an analog sound wave signal, characterized in that the frequency band is 1,600 Hz to 2,000 Hz.

In another aspect, the present invention is characterized in that the color of the input video signal itself is converted into a code of compression and a specific code to transmit and receive.

In another aspect, the present invention, the encryption code conversion, by generating a special code and transmitting it and the receiving unit to decrypt the code, first inputting the color signal of the screen to be transmitted, assigning a sequence conversion algorithm and specifying a security code table And a first change step of generating a code part by an algorithm and a second change step of changing from a security code table to a corresponding code.

In addition, the present invention is characterized by adopting a video storage method by the MPEG algorithm in the memory storage method.

In addition, the present invention is characterized in that the signal input method for the radio uses a data terminal that can use a digital signal, and the microphone terminal of the international standard MKS or FSK method can be used.

In the present invention, the image display is characterized in that the display can be instantaneously after loading the data into the memory.

In the present invention, the flow of the image is characterized in that the sequential display method that can be displayed sequentially.

In addition, in the present invention, the radio control is characterized in that the full-duplex communication method capable of confirmation and control communication.

In the present invention, the image input control is characterized in that the hardware control method by the electronic circuit.

Also, in the present invention, the process of converting image and text information into sound waves is performed by a sound wave resonator, and the sound wave resonator is not used when using a data terminal, and when using a microphone terminal, a sound wave of MKS and FSK type sensors is used. It is characterized in that it is a way to fit to a certain level.

In the present invention, when transmitting and receiving image information, it is characterized by changing the color signal to a predetermined code and then to the MSK and FSK sound of the international standard.

1 is a view showing the basic structure of the acoustic wave resonator of the present invention

2 is a diagram showing a method of changing a video signal of the present invention to a sound;

3 is a diagram illustrating a method of changing a text signal of the present invention to a sound;

4 is a diagram showing the overall configuration of an image and data transmission method and apparatus using sound waves of the present invention;

* Description of the symbols for the main parts of the drawings *

10: data input terminal 20: data output terminal

30: sensor 100: sound wave resonator

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing the basic structure of the acoustic wave resonator 100 of the present invention. The acoustic wave resonator 100 shown in the drawing is a device for making analog amplitude sound waves by connecting to a communication device currently in use. That is, when an image and a data signal to be transmitted are input through the data input terminal 10, the signal is converted into analog amplitude sound waves of a predetermined level in the acoustic resonator 100. Thereafter, the changed signal is transmitted through the data output terminal 20 to the communication device connected to the rear stage. Here, after changing the amplitude of the color signals R (Red), G (Green), and B (Blue) among the image signals, and adding a synchronization signal for each signal, the brightness of each color is changed to the high and low of the waveform (amplitude). ). The sensor 30 serves to adjust the sound wave to a predetermined level.

2 and 3 are diagrams illustrating a mechanism for changing the video signal and the data signal of the present invention to a sound.

As can be seen in Figure 2, the video signal is converted into an analog signal from a digital signal through the wireless transmission device of the present invention. In a digital signal, "zero" is converted to 1.000 Hz and "day" is converted to 1,400 Hz.

In the flow of the video signal, first, after converting according to color and brightness, that is, converting from analog to digital, it is compressed and stored in a predetermined format. The central processing unit converts the format, that is, the compressed digital signal from digital to analog signal as described above, and then transmits it through the radio. At this time, the video signal converted into an analog sound wave signal is loaded on the carrier from the radio and transmitted to the remote site.

3 is a diagram illustrating a conversion mechanism for transmitting a text signal of the present invention. As can be seen in the figure, the text signal input through the keyboard or the like is converted into a form that can be transmitted by the signal controller and the central processing unit. That is, as can be seen in the figure, the digital signal "zero" for a character is converted to 1,600 Hz and "one" is converted to 1,800 Hz.

In the flow of the character signal, the character signal input through the keyboard is converted into a character code for each character and converted into a predetermined format in the signal controller through the keyboard buffer. Thereafter, the central processing unit sequentially rearranges the edited and processed text signals to the storage device so that the transmission device can smoothly transmit them. The rearranged text signal is transmitted through the radio as described above.

As a feature of the present invention, when transmitting video and text signals, it is encrypted and transmitted. In this case, the encryption generates a special code, transmits it, and adopts a method of decrypting the code at a receiving unit. A method of encrypting an image signal will be described below by way of example. First, input the color signal of the screen to be transmitted, substitute the order conversion algorithm, and specify the security code table. After that, a code part by an algorithm is generated. This is a primary change. That is, primary processing is performed on the color signal. Secondary changes are then made, changing to the corresponding code in the security code table.

Figure 4 shows the overall configuration of the image and data transmission method using the sound wave of the present invention. The input device receives a video camera and an NTSC video signal and connects various input media to enable self recognition. The image capturing and analog / digital converting device connected to the rear of the input device captures an image signal input to the input device by 1-frame by the user's selection and performs analog / digital conversion to recognize the image.

The central processing unit plays a brain role in the device of the present invention and is used as a core device that manages the control of data and controls the flow of all signals inside the device. A special encryption code generator is connected to the central processing unit, which is used as an encryption code generator that creates the best solution of security as described above.

The central processing unit is connected to a memory and a control device, which is a built-in memory and a device for controlling the video signal to temporarily store or transmit and receive the image itself. In addition, the communication control device is a device for controlling the video signal input and communication device to the communication device so that the transmission data can be connected to the communication device and transmitted.

The power management device controls and supplies the correct voltage and current for each device so that all functions can operate normally. The display device is a built-in device for displaying the transmitted image on a monitor or other display device.

In order to diversify and maximize the functions of the present invention, an optional device having a built-in function may be separately connected and used so as to mount additional optional equipment. In addition to this, a computer connection device can be used, which is a connection device for controlling and managing the functions and operations of the method unattended or remotely using a computer. A security access device is a device that can be used for military, police, and other security-required tasks that require security video transmission.

Thus, by implementing the method and apparatus for transmitting and receiving images and data using the sound wave of the present invention, it is possible to transmit the image and text information using the existing communication device and communication network as it is, and to transmit while maintaining security. It is possible to use all weather regardless of place and time because transmission is performed immediately regardless of disconnection of wired network in places where general communication cannot be made due to natural disaster or unexpected accident. In addition, it is possible to check the movement status and the status of the site while moving from emergency vehicles such as fire departments, emergency rescue teams and hospitals to destinations, and quickly transmit drawings, photos, and other images at construction sites. The efficiency can be increased.

Claims (14)

In the video and text information transmission and reception method, the video and text signal is modulated into an analog signal corresponding to a sound wave frequency, and then loaded on a carrier of a general radio and transmitted to a remote site, and a receiver receives the transmitted signal and loads the signal on a carrier. Image and text information transmission and reception method, characterized in that for converting the video and text signal to a digital signal to display the original video and text. The method of claim 1, wherein the frequency band is 1,000 Hz to 1,400 Hz when the image signal is converted from a digital signal to an analog sound wave signal. The method of claim 1, wherein the frequency band is 1,600 Hz to 2,000 Hz when the text signal is converted from a digital signal to an analog sound wave signal. The method according to claim 1 or 2, wherein the color itself of the input video signal is converted into an encryption code of compression and a specific code and transmitted. The method of claim 4, wherein the encryption code conversion is a method of generating a special code, transmitting the same, and decrypting the code at a receiving unit, first inputting a color signal of a screen to be transmitted, assigning an order conversion algorithm, and specifying a security code table. And a first change step of generating a code part by an algorithm, and a second change step of changing from a security code table to a corresponding code. The method of claim 1, wherein the memory is stored in an image storing method using an MPEG algorithm. 2. The method of claim 1, wherein a signal input method to the radio uses a data terminal capable of using a digital signal, and an MKS or FSK microphone terminal, which is an international standard, can be used. 7. The method of claim 1 or 6, wherein the image display can be instantaneously displayed after the data is loaded into the memory. The method of claim 6 or 8, wherein the flow of the image is a sequential display method that can be sequentially displayed. The method of claim 1, wherein the radio control is a full-duplex communication method capable of confirming and controlling communication. The method of claim 1, wherein the image input control is a hardware control method by an electronic circuit. The method of claim 1, wherein the process of converting image and text information into sound waves is performed by a sound wave resonator, and the sound wave resonator is not used when using a data terminal, and when using a microphone terminal, sound waves of MKS and FSK type sensors are used. Image and text information transmission and reception method, characterized in that the method to match to a predetermined level. The method of claim 1, wherein the color signal is changed to a predetermined code when the image information is transmitted, and then changed to an MSK and FSK sound of an international standard. In the video and text information transmission and reception device, the video and text signal is modulated into an analog signal corresponding to a sound wave frequency, and then loaded on a carrier of a general radio and transmitted to a remote site, and a receiver receives the transmitted signal and loads it on a carrier. Image and text information transmission and reception device, characterized in that for converting the video and text signal to a digital signal to display the original video and text.