JPH0646178A - Picture transmitter - Google Patents

Abstract

PURPOSE:To confirm a previously transmitted picture by writing the same picture information as the transmitted picture information in a data card, and reproducing a picture signal based on the picture information stored in the data card. CONSTITUTION:When a picture transmission is ended, the picture signal stored in a frame memory part 117 is outputted to a buffer part 18 by a system control part 113, and recorded in a data card 19 as the transmitted digital picture. And also, the address information of the digital picture recorded in the card 19 is recorded in a random access memory part 116. The address information stored in the memory part 116 is used as an index at the time of a picture reproduction. When an index number is selected by a control panel, the picture signal stored in the pertinent address of the card 19 is outputted to a data bus by referring to the address information stored in the memory pat 116 by the control part 113. Then, the picture signal is held by a latch part 108, converted into a time-successive picture signal, processed, and outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image transmission device having a frame memory.

Further, the present invention relates to an image transmission device having means for recording a plurality of transmitted and received image information.

[0003]

2. Description of the Related Art In recent years, when an image signal is transmitted using a high speed digital line network such as ISDN (Integrated Service Digital Network), the image signal is first converted into a digital image signal and then converted into a semiconductor memory such as a frame memory. A method of recording and outputting to a network through a modem (modulator / demodulator) is adopted.

FIG. 8 shows a conventional image transmission device.

The control program stored in the program memory unit 115 is executed by the system control unit 113, and a work area required for execution by the system control unit 113 is secured in the random access memory unit 116. Based on the address value output from the system control unit 113, the address decoder unit 114 selects one of the program memory unit 115, the random memory unit 116, and the frame memory unit 117.

The image signal input from the input terminal is processed by the signal processing unit 102 and then the A / D conversion unit 103.
Are converted into discrete digital image signals by the latch unit 104 and latched by the latch unit 104. The digital image signal is recorded in the frame memory unit 117 via the data bus under the control of the system control unit 113.

On the other hand, when the digital image signal recorded in the frame memory unit 117 is transmitted using a line network,
The digital image signal is sent to the modem 111 together with the additional data for communication control by the system control unit 113 according to the communication protocol, and after being matched with the electrical characteristics of the line network, by the control of the NCU (network control unit) 110. It is output to the line network. When transmitting the next image signal, the image is similarly recorded in the frame memory unit 117.

The digital image signal stored in the frame memory unit 117 is latched by the latch unit 108, converted into an analog signal by the D / A conversion unit 107, processed by the signal processing unit 106, and then output. The image is output from the terminal 105 and an image is displayed on a display (not shown).

[0009]

However, in the above-mentioned conventional example, when a plurality of image signals are transmitted, the next image signal is stored in the frame memory unit 117 after the transmission of the image signals is completed. Therefore, there has been a problem that the already transmitted image signal cannot be confirmed regardless of the transmitting side and the receiving side.

Further, when the same transmission image is to be reproduced on the transmitting side and the receiving side, the index of the selected transmission image or the index of the transmission image selected on purpose is given in order to inform the other side of the transmission image selected on either side. However, there was a drawback that we had to verbally notify the sending time.

An object of the present invention is to solve the above problems and drawbacks, and to provide an image transmission apparatus capable of confirming an already transmitted image.

[0012]

In order to achieve such an object, the present invention firstly stores a processing means for processing input image information, and temporarily stores the image information processed by the processing means. In an image transmission device having a frame memory for storing and image data stored in the frame memory, a data card, and the same image information as the image information transmitted by the transmission unit is stored in the data card. It is provided with a writing means for writing in the card and a reproducing means for reproducing an image signal based on the image information stored in the data card. Further, according to the present invention, secondly, an image selecting means for selecting arbitrary image information from a plurality of image information recorded on the data card, and a selection for transmitting selection information of the image information selected by the selecting means. Information transmitting means, selection information receiving means for receiving selection information transmitted when receiving selection information, and an image for selecting specific image information from a plurality of image information recorded on the data card according to the received selection information By providing the selecting means, it is possible to immediately reproduce the same transmission image on the transmitting side and the receiving side.

[0013]

According to the present invention, the same image information as the image information transmitted by the transmitting means is written in the data card by the writing means, and the image signal is reproduced by the reproducing means based on the image information stored in the data card.

[0014]

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

FIG. 1 shows a first embodiment of the present invention.

In the figure, 101 to 117 show the same parts as in FIG. A data card 19 stores the image signal input via the buffer unit 18.

FIG. 2 is a flow chart showing an example of the control program stored in the program memory unit 115 shown in FIG.

The image signal input from the input terminal 101 is processed by the signal processing unit 102 and then converted into a time-discrete digital image signal by the A / D converter 103.
The digital signal is held by the latch unit 104, and the held digital signal can be accessed from the data bus shared by the system.

When image signal recording is selected from a control panel (not shown) in step S21, the system controller 113 selects the frame memory 117 based on the selection signal from the address decoder 114 in step S22. The image signal held in the latch unit 104 is stored in the frame memory unit 117.

When the image signal transmission is selected by the control panel (not shown) in step S23, step S24
In the system control unit 1, the image signal stored in the frame memory 117 and the control data for communication are stored.
The communication data is combined on the random access memory unit 16 by 13 to generate communication data and output to the data bus. The communication data output on the data bus is latched by the latch unit 112.
Hold by the modem 111, and the modem 111 matches the line network, and the line terminal 1 is used as a modulated wave via the NCU 110.
It outputs from 09 to the network.

Upon completion of image transmission, in step S25, the image signal stored in the frame memory unit 117 is output to the buffer unit 18 by the system control unit 113 via the address bus and the data bus.
It is recorded as a transmitted digital image on the data card 19. Further, the address information of the digital image recorded on the data card 19 is stored in the random access memory unit 116 by the system control unit 113. The address information stored in the random access memory unit 116 is used as an index when reproducing the transmission image signal.

When the index number corresponding to the reproduced image signal is selected from the control panel (not shown) in step S26, the address stored in the random access memory unit 16 is selected by the system control unit 13 in step S27. The image signal stored in the address of the data card 19 is output to the data bus with reference to the information. Then, the image signal output to the data bus is held by the latch unit 8, converted into a continuous image signal by the D / A conversion unit 107, processed by the signal processing unit 106, and then output from the output terminal 105.

As described above, it is possible to check the image on the transmitting side even after the transmitted image is transmitted.

In this embodiment, an example has been described in which the same image signal as the transmitted image signal is recorded on the data card after the image signal is transmitted, but it may be performed before the image signal is transmitted. In this case, the effects are essentially the same. Next, Embodiment 2 of the present invention is shown in FIGS.

In the second embodiment, an image transmission apparatus having means for recording a plurality of transmitted and received image information is constructed as shown in FIG.

In the figure, 101 is an image signal input terminal, 102 is a signal processing unit for the image signal, 103 is an A / D conversion unit for converting an input continuous image signal into time discrete image data, Reference numeral 104 is a latch unit for latching image data from the A / D conversion unit, 105 is an output terminal for outputting an image signal for reproduction to a monitor (not shown), 106
Is a signal processing unit for an image signal to be reproduced, 107 is a D / A conversion unit for converting time-discrete image data into a time-continuous image signal, and 108 is a latch for latching image data input to the D / A conversion unit. Reference numeral 109 is a line terminal for connecting the line network to the conventional image transmission device, 110 is an NCU (network control unit) for exchanging the line with the image transmission device on the other side via the line network, and 111 is the line network. A modem (modulator / demodulator) that modulates image information in accordance with electrical characteristics and demodulates a modulated wave from a line network into image information, 112 latches image information output to the modem (modulator / demodulator), and modem (modulator / demodulator) Latch unit for latching image information from the display device, 42 is a character generation unit for converting character data from the system control unit 113 into an image signal and displaying the character information on the display, and 113 is a conventional example. System control unit for controlling the image transmitting device, 41 is a real time clock unit to know the date and current time, 114 an address decoder for generating a chip select signal by decoding the address signal from the system control unit 113, 1
Reference numeral 15 is a program memory unit for storing a program for controlling a conventional image transmission apparatus, 116 is a random access memory unit as a work area memory of the system control unit 113, 18 is an address bus and data bus buffer unit, and 19 is a transmission unit. A data card for recording image information of an image, 40 is a DCT (discrete cosine transform) of an image signal
An image compression / decompression unit 117 for compressing an image and decompressing a compressed image by using the like, and a frame memory unit 117 for storing an image signal.

FIG. 4 shows an example of the control program stored in the program memory unit 115 shown in FIG.

The operation of the above arrangement will be described with reference to the flow chart of FIG.
When image signal recording is selected from the operation panel (not shown) by 401, the image signal input from the input terminal 101 is converted into image data by the A / D conversion unit 103,
The image data is latched by the latch unit 104. Further, the image data latched in the latch unit 104 by the system control unit 113 is recorded in the frame memory unit 117 via the data bus.

Next, in step S403, when image transmission is selected by an operation panel (not shown), step S40
At 4, the system control unit 113 reads the image signal stored in the frame memory 117 and inputs it to the image compression / expansion unit 40 via the data bus. The image compression / decompression unit 40 compresses the image signal, and the compressed image signal is stored in the random access memory unit 116.

When the compression of the image signal is completed, step S
At 405, the system control unit 113 reads the current time information from the real-time clock unit 41 and combines it with the compressed image signal on the random access memory unit 116 to generate image information data.

Thereafter, in step S406, the image data and the control data for communication are combined by the system control unit 113 to generate communication data, which is output onto the data bus. The communication data output to the data bus is held by the latch unit 112, and the modem 111
By matching with the network by NCU11 as a modulated wave
The signal is output from the line terminal 109 via 0 to the line network.

Upon completion of image transmission, step S407
Then, the image information data recorded in the random access memory unit 116 is output to the buffer unit 18 via the address bus and the data bus by the system control unit 113 and recorded as the transmitted image data in the data card 19. To do. Further, the address information of the image information data recorded in the data card 19 is recorded in the random access memory unit 116 by the system control unit 113. The address information recorded in the random access memory unit 116 is used as an index when reproducing the transmission image signal.

When the index signal corresponding to the reproduced image signal is selected from the operation panel (not shown) in step S408, the system controller 113 controls the data card recorded in the random access memory 116 in step S409. Referring to 19 address information,
The image information data stored at the address of the data card 19 is read into the random access memory unit 116 via the data bus. The read image information data separates the image data compressed by the system control unit 113 from the time information. The separated compressed image data is input to the image compression / expansion unit 40 via the data bus, and the image signal is expanded. The time information is input to the character generation unit 42 as character data for displaying the time by the system control unit 113 in step S410, converted into an image signal by the character generation unit 42, and output. Step S
At 411, the expanded image signal output from the image compression / expansion unit 40 is output to the system control unit 113.
Is output to the data bus. Then, the expanded image signal output to the data bus is held by the latch unit 108, converted into a time-continuous image signal by the D / A conversion unit 107, and superposed on the time information converted into the image signal, After being processed by the signal processing unit 106, the output terminal 1
Output from 05.

As described above, when the image is compressed and the transmitted image is recorded on the data card, and when the transmitted image is confirmed on the transmitting side, the transmitting time can be known.

Next, another example of the second embodiment will be described with reference to FIGS.
Will be explained. FIG. 5 is a flowchart showing another example of the control program stored in the program memory unit shown in FIG.

When image signal transmission is selected by a control panel (not shown) in step S503, step S503 is performed.
At 504, the system control unit 113 reads the image signal stored in the frame memory unit 117,
Input to the image compression / decompression unit 40 via the data bus.
The image compression / decompression unit 40 compresses the image signal, and the compressed image signal is stored in the random access memory unit.

When the compression of the image signal is completed, step S
At 505, the system control unit 113 reads the current time information from the real-time clock unit 41 and combines it with the compressed image signal on the random access memory unit 116 to generate image information data.

Thereafter, in step S506, the image information data and the control data for communication are combined by the system control unit 113 to generate communication data,
Output on the data bus. The communication data output on the data bus is held by the latch unit 112, is matched with the line network by the modem 111, and is NC as a modulated wave.
The signal is output from the line terminal 109 to the line network via U110.

Upon completion of image transmission, step S507
The image information data recorded in the random access memory unit 116 is output to the buffer unit 18 via the address bus and the data bus by the system control unit 113, and is sent to the data card 19 as the image information data that has been transmitted. Record. Further, the address information of the image information data recorded on the data card 19 is transferred to the random access memory unit 1 by the system control unit 113.
Record at 16. The address information recorded in the random access memory unit 116 is used as an index when reproducing the transmission image signal.

When the index signal corresponding to the reproduced image signal is selected from the control panel (not shown) in step S508, the system controller 113 controls the random access memory 11 in step S509.
The image information data stored in the address of the data card 19 is read into the random access memory unit 116 via the data bus by referring to the address information of the data card recorded in the data card 6. The read image information data separates the image signal compressed by the system control unit 113 from the time information. The separated compressed image signal is sent to the image compression / expansion unit 40 via the data bus.
Is input to the device and the image signal is expanded. Further, the time information is input to the character generation unit 42 as character data for displaying the time by the system control unit 113 in step S510, converted into an image signal by the character generation unit 42, and output.

In step S511, the expanded image signal output from the image compression / expansion unit 40 is output to the data bus by the system control unit 113. Then, the expanded image signal output to the data bus is held by the latch unit 108, and the D / A conversion unit 1
At 07, the image signal is converted into a time-continuous image signal, which is superimposed on the time information converted into the image signal, processed by the signal processing unit 106, and then output from the output terminal 105.

In this way, when the image is compressed and the transmitted image is recorded in the data card, and when the transmitted image is confirmed on the transmitting side, the transmitting time can be known.

The third embodiment of the present invention is shown in FIGS.

In FIG. 6, 18 to 117 indicate the same parts as in FIG. 3, and 10 indicates DTMF (Dual-Tone-Mo).
A DTMF detection unit having a filter circuit in the frequency band used for the duty-frequency signal and a decoding circuit for decoding the image selection signal from the detected frequency, and 11 holds the image selection signal decoded by the DTMF detection unit. A latch unit, 12 is a DTMF conversion unit for converting the image selection signal from the system control unit 114 into a DTMF signal, and 13 is a latch unit for the image selection signal input to the DTMF generation unit.

FIG. 7 shows an example of the control program stored in the program memory unit 115 shown in FIG.

When image transmission is selected by the operation panel (not shown) in step S203, the system control unit 113 causes the frame memory 1 to operate in step S204.
The image signal stored in 17 is read and input to the image compression / expansion unit 40 via the data bus. Image compression /
The decompression unit 40 compresses the image signal, and the compressed image signal is stored in the random access memory unit 116.

When the compression of the image signal is completed, step S
In 205, the system control unit 113 generates an ID (identification) number peculiar to the transmission image to be transmitted this time, and in step S206, the real time clock unit 4 is generated.
The current time information is read from 1, and the compressed image signal on the random access memory unit 116 is combined with the time information and the transmission image ID number to generate image information data. Then, in step S207, the image data and the control data for communication are combined by the system control unit 113 to generate communication data and output to the data bus. The communication data output to the data bus is held by the latch unit 112, and the modem 111
By matching with the network by NCU11 as a modulated wave
The signal is output from the line terminal 109 via 0 to the line network. When the image transmission is completed, the image information data recorded in the random access memory unit 116 is output to the buffer unit 18 via the address bus and the data bus by the system control unit 113 in step S208.
The image data is recorded in the data card 19 as transmitted image data. Further, the system control unit 113 sets the address information and the transmission image ID number of the image information data recorded in the data card 19 to the random access memory unit 11.
Record at 6. These pieces of information are used as indexes when reproducing the transmission image signal. Step S2
When the index signal corresponding to the reproduced image signal is selected from the operation panel (not shown) at 09, step S210
At this time, the system control unit 113 refers to the address information of the data card 19 recorded in the random access memory unit 116, and the transmission image I of the image information data stored at the address of the data card 19 is transmitted.
The D number is output to the latch unit 13 via the data bus.
The DTMF generating unit 12 sends the transmission image ID number to the DTMF.
It is converted into a signal and output to the image transmission device on the other side via the line network.

In step S214, when the DTMF detection unit 10 detects the DTMF signal transmitted from the image transmission device on the other side, the DTMF signal is converted into the transmission image ID number, and the transmission image ID number is converted. Is read into the random access memory unit 116 from the latch unit 11 via the data bus by the system control unit 113, and the index signal corresponding to the ID is selected.

Hereinafter, steps S211 to S213 of FIG.
Is executed in the same manner as S409 to S411 of FIG. 4, and the selected transmission image is reproduced.

Also, in the other party image transmission device, D
When the TMF signal is detected, the same transmission image can be reproduced on both the transmitting side and the receiving side by performing the operations in and after step S214.

[0051]

As described above, according to the present invention,
Since the same image information as the transmitted image information is written in the data card and the image is reproduced based on the image information stored in the data card, there is an effect that the already transmitted image can be confirmed. .

Further, by compressing the image information and storing it in the data card, the capacity of the data card can be effectively used.

Further, by storing the additional information such as the transmission time and the transmission number accompanying the transmitted image in the data card, the transmitted image can be easily managed.

Furthermore, arbitrary image information is selected from a plurality of image information recorded on the data card, and the selection information of the selected image information is transmitted to the partner image transmitting apparatus and the image information is reproduced. Therefore, there is an effect that the same transmission image can be immediately confirmed on the transmitting side and the receiving side.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a flowchart showing an example of a control program stored in a program memory unit in the first embodiment shown in FIG.

FIG. 3 is a block diagram showing a second embodiment of the present invention.

FIG. 4 is a flowchart showing an example of a control program stored in a program memory unit in the second embodiment shown in FIG.

FIG. 5 is a flowchart showing another example of the control program stored in the program memory unit in the second embodiment shown in FIG.

FIG. 6 is a block diagram showing a third embodiment of the present invention.

7 is a flowchart showing an example of a control program stored in a program memory unit in the third embodiment of the present invention shown in FIG.

FIG. 8 is a block diagram showing a conventional image transmission device.

[Explanation of symbols]

 18 buffer section 19 data card 102, 106 signal processing section 103 A / D conversion section 104, 108, 112 latch section 107 D / A conversion section 110 NCU 111 modem 113 system controller section 114 address decoder section 115 program memory section 116 random access Memory section 117 Frame memory section

Claims (5)

[Claims] 1. A processing means for processing input image information, a frame memory for temporarily storing the image information processed by the processing means, and a predetermined processing for the image information stored in the frame memory. In the image transmission device having a transmission means for applying and transmitting, a data card,
Writing means for writing in the data card the same image information as the image information which has been subjected to predetermined processing and transmitted by the transmitting means; and reproducing means for reproducing an image signal based on the image information stored in the data card. An image transmission device comprising: 2. The image transmission device according to claim 1, wherein the predetermined process performed by the transmitting unit is an image compression process. 3. The predetermined process by the transmitting means is an additional process of supplementary information including at least one of a transmission date and time, identification information and a transmission state. Image transmission device. 4. An image information input unit, a frame memory for temporarily storing the image information input by the input unit, a transmitting unit for transmitting the image information stored in the frame memory, and a receiving unit for receiving the image information. An image having a receiving means for receiving transmitted image information, a recording means for recording a plurality of transmitted or received image information, and a reproducing means for reproducing an image signal based on the image information recorded in the recording means. In the transmission device, an image selection unit that selects arbitrary image information from a plurality of image information recorded in the recording unit, a selection information transmission unit that transmits selection information of the image information selected by the selection unit, and a selection unit. Selection information receiving means for receiving selection information transmitted at the time of information reception, and a plurality of image information recorded in the recording means according to the received selection information. Image transmission apparatus characterized by comprising an image selection means for selecting a specific image information from. 5. The image transmission device according to claim 4, wherein the image information selected by the selection information is reproduced by the reproducing means on the transmitting side and the receiving side.