JP2522172B2 - Image communication terminal - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image communication terminal device, and more particularly to ISDN which is a service integrated digital network.
The present invention relates to an image communication terminal device that uses a basic interface of (Integrated Service Digital Network).

[0002]

2. Description of the Related Art Conventionally, in this type of terminal device, in the access for transmitting or receiving image data, transmission / reception is performed based on the arrival time, dial information, etc. in the automatic reception mode.
Non-execution is uniquely selected. As prior art examples relating to this selection switching, there are JP-A-2-271758 and JP-A-63-3.
9263 and the like are available.

[0003]

However, in this conventional terminal device, especially in the terminal device used for the monitoring device, etc., the remote station is often unmanned, so that it is mostly used for automatic incoming call. . In such a case, it is not possible to change the mode for each call such that only a specific incoming call is received and all other incoming calls are rejected. Further, unless the incoming call permission is always selected as a manual incoming call to prevent erroneous connection, there is a problem that an image is transmitted to an unrelated place when an incorrect connection is made.

It is an object of the present invention to provide an image communication terminal device capable of preventing erroneous transmission in an automatic incoming call operation mode.

[0005]

In order to achieve such an object, an image communication terminal device for transmitting and receiving image data via a communication line of the present invention comprises an ID generating means for generating a first identification code and a first generating means. Image data mixing means for inserting the identification code of the above into the image data, ID detection means for extracting the second identification code mixed in the image data from the received image data, and the third identification code Second storage means
Comparing means for comparing whether or not the identification code and the third identification code are the same, a connection time monitoring timer for measuring the connection time after being accessed through the communication line, and determining whether or not a response to the access is possible. And the connection control means for controlling the communication operation based on this discrimination, and the time a from the transmission of the first identification code until the ID detection means extracts the second identification code, and the second When the identification code is not the same as the third identification code, the connection time monitoring timer measures the time b until the reception of the same identification code, and the time a is a predetermined time A and the time b is a predetermined time B. It is characterized in that it waits for incoming image data in which a proper identification code is inserted in a mute state up to each point. Further, when the time a reaches the predetermined time A or the time b reaches the predetermined time B, the connection control means may interrupt the mute state, reject the access, and cut off subsequent communication.

[0006]

According to the image communication terminal device of the present invention, the first identification code is generated and the generated first identification code is inserted into the image data. Also, the second identification code mixed in the image data is extracted from the received image data. The extracted second identification code is compared with the separately stored third identification code to check whether they are the same. Furthermore, the connection time after being accessed through the communication line is measured, it is determined whether or not a response to the access is possible, and the communication operation is controlled based on this determination. That is, the time a until the second identification code is extracted after transmitting the first identification code, and until the same identification code is received when the second identification code is not the same as the third identification code. Is measured until the time a reaches a predetermined time A and the time b reaches a predetermined time B, and the image data in which the proper identification code is inserted is waited for. By this procedure, it is checked whether or not the communication partner is a legitimate communication partner, and the continuous communication procedure can be distributed.

[0007]

Embodiments of the image communication terminal device according to the present invention will now be described in detail with reference to the accompanying drawings. Referring to FIG. 1, an embodiment of an image communication terminal device of the present invention is shown as a functional block diagram. First, the configuration of the image communication terminal device of the present embodiment will be described with reference to FIG.

The image communication terminal device of this embodiment comprises an I / F part 21 which is an interface part with a communication line, a control part 22 which is a central part of the device and which controls an incoming or outgoing operation of image and voice data, The input / output unit 23 is configured to display / acquire image and audio data. The connection relationship between these units is based on the I / F unit 2 centering on the input / output unit 23.
1-control unit 22-input / output unit 23 is connected to the series I
The / F unit 21 is connected to a communication line that connects a plurality of devices.

The I / F unit 21 comprises a line I / F unit 1 and a dial information detecting unit 2. The line I / F unit 1 is a so-called interface unit connected to the line. Received data of this device is transmitted from the line I / F unit 1 to the dial information detection unit 2 and the control unit 22, and transmitted data from this device is sent to the line via the control unit 22 and the line I / F unit 1. Sent. These operations are controlled by the control unit 22. The dial information detecting unit 2 is the line I / F unit 1.
Dial information, which is information of the transmission source, is extracted from the image and sound data received by. Since the dial information is inserted into the image / voice data and transmitted, the dial information detection unit 2 extracts only the dial information from the mixed image / voice data, and the extracted information is transmitted to the control unit 22.

The control unit 22 controls the video / audio codec 3, I.
It is composed of a D generation unit 4, an ID detection unit 5, a connection control unit 6, a connection monitoring timer 7, and a dial information storage unit 8. As described above, the control unit 22 is the central unit of the present device, and is configured by the connection control unit 6 as a main component and the peripheral circuit unit having each function described below.

The image / sound codec 3 includes a buffer memory for temporarily storing image and sound data, and transmission / reception of data.
This is a functional unit that constructs and converts data when performing analysis and monitor display. Regarding the input / output relationship of image and audio data, data is exchanged with other devices by connecting the line I / F unit 1 to the line. The received image / sound data is displayed on the monitor by the input / output unit 23.
Further, the image / sound data acquired by the input / output unit 23 is output to the line via the image / sound codec 3 and the line I / F unit 1. In addition to the above, connected to the ID generation unit 4,
Identification code (ID) for distinguishing this device from other devices
It has a function part for inserting the code) into the image / audio data. The ID code is constructed by inserting the ID code into a predetermined data area of the digital image data. This data is used as a so-called keyword. Further, in order to extract and output the ID code inserted in the data received from outside the device, it is connected to the ID detection unit 5 by a data line.

The ID generating section 4 generates and outputs an ID code in the form of a digital code, and the output ID code is received by the video / audio codec 3. The ID code is an identification code between communicating devices, and is data for identifying and specifying a communication partner.

The ID detecting section 5 is a functional section for identifying the ID code, and the data input line is the video / audio codec 3.
Further, the output line is connected to the connection control unit 6. The ID detection unit 5 has a functional unit that decodes the code of the ID code input from the input line, and the decoded content is output.

The connection control unit 6 has a hardware structure mainly including a central processing unit (CPU) (not shown). The main functions are communication control of image data, determination of match / mismatch with the registration code of the received ID code, confirmation of dial information data, determination of communication permission / non-permission. In order to perform these functions, a detection signal is obtained from the dial information detection unit 2, an ID code is received from the ID detection unit 5,
Time information is obtained from the connection monitoring timer 7 and registered dial data is obtained from the dial information storage unit 8. A control signal is output to the line I / F unit 1 in order to control communication based on the above various data.

The connection monitoring timer 7 is a circuit unit that performs a time-related function for the connection control unit 6 to control the operation of the apparatus. Items used in this control are, for example, the time at the time of an incoming call and the I
It is the waiting time until the D code is sent. This is a timer for measuring these times, and control operations such as start and reset are performed by the connection control unit 6, and data of the measurement time is transmitted to the connection control unit 6. The connection control unit 6 stores data such as a reference time at the time of an incoming call and a predetermined response time, which are used as judgment materials.

The dial information storage section 8 is a circuit section for storing the dial number of the communication partner. As for the form of registration of the dial number of the communication partner, the calling number for accessing from this apparatus and the abbreviated number for operation input are compared and registered. The registered call number is utilized by the connection control unit 6.

The camera 9, the monitor 10, the speaker 11, and the microphone 12 which constitute the input / output unit 23 are terminal input / output units for information data. The camera 9 acquires image data and the microphone 12 acquires audio data, and the acquired data is output to the image audio codec 3. Further, the data acquired by the camera 9 and the microphone 12 or the data received via the line is reproduced by the monitor 10 and the speaker 11 into an image and a sound.

An operation example of the image communication terminal device having the above-described equipment and function configuration will be described with reference to the flowcharts of FIGS. 2 and 3.

The image communication terminal device is normally in a reception standby state, and the presence or absence of an incoming call is constantly checked (S31). When there is an incoming call, first the time at the incoming call is checked (S32). The execution time zone of normal communication is predetermined, and the time is registered in the temporary storage memory (not shown) of the connection control unit 6. The connection control unit 6 receives a signal indicating that there is an incoming call through the dial information detection unit 2,
The connection control unit 6 reads the incoming call time from the connection monitoring timer, and checks whether it is within the registered communication execution time zone (S32). If it is outside the registration time of "NO",
It is considered as a manual call. If it is within the registration time of "YES", ON / OFF of the dial check mode is identified (S33). The dial check mode refers to identification of which setting is selected as to whether or not to check the dial information of the called party. Whether or not to execute is registered in advance from an operation panel (not shown).

In the case of "NO" in which the execution selection setting is not made, the dial number in step 34 is not checked and the process proceeds to step 35. In the case of "YES", it is checked whether or not the dial number of the person who is requesting access for the incoming call is registered (S34). In this check, the dial information detecting unit 2 detects dial information of the other party who has accessed from the line I / F unit 1, and passes the detected dial information to the connection control unit 6. The connection control unit 6 checks whether or not there is a match between the received dial information and the number stored in the dial information storage unit 8 (S
34). If it matches the registration number, the process proceeds to “YES” and the call is automatically received. If “NO”, the call is manually received.

The incoming mode is set by the above procedure. In the case of an automatic incoming call, the subsequent transmission / reception operation of the image / voice data proceeds according to the procedure set in the program of this apparatus in advance (S35). Further, in the case of manual reception, the subsequent communication will be executed based on the operation of the operator (S36).

For the communication procedure after the incoming call, first click here ID
Send the code (S41) to obtain the ID code of the other party,
Wait for incoming ID code. It is checked whether or not the ID code is received (S42). If "NO",
The mute state (S46) is set and it is determined whether or not to continue the incoming call waiting state (S47). This determination is based on the duration. The continuation time is measured by the connection monitoring timer 7, and when a predetermined time (A) has passed, access is denied, communication is cut off, and the process ends. If "YES", the ID code is determined (S43).

To determine the ID code, the ID detection unit 5 extracts the ID data from the data stored in the video / audio codec 3, passes the extracted ID data to the connection control unit 6, and the connection control unit 6 sends the ID code. Is checked (S44). If the ID code is legitimate, the image / sound data is transmitted (S45). If it is not proper, the muting state (S48) is set, the connection monitoring timer 7 is started, and the transmission of the ID code is requested again. In step 49, it is checked whether or not this ID code checking operation has passed a predetermined time (B) (S49).
If “YES”, the access is rejected, the communication is cut off, and the process ends.

By confirming the communication partner according to the identification by the above-mentioned procedure, the transmission of the image / sound data is prevented from being transmitted to a communication partner other than the dial number registered in advance.

The above-mentioned embodiment is an example of the preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention. For example, in the above embodiment, the ID code is inserted at the beginning of the image data at the end, but the ID code is mixed with the image data according to a predetermined procedure, and the ID data is selected and extracted from the mixed image data. If code matching is performed, it becomes difficult to analyze the ID code, and if the image is reproduced as it is, the image cannot be reproduced as a regular image, and the airtightness of communication can be further enhanced.

[0026]

As described above, according to the image communication terminal device of the present invention, the identification code is mixedly transmitted to the image data and transmitted,
The identification code mixed in the image data is extracted from the image data of the communication partner who has accessed, and it is determined whether or not the extracted identification code is registered to control the subsequent communication operation. It is possible to prevent careless transmission of image data.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of an image communication terminal device of the present invention.

FIG. 2 is a flowchart for explaining a receiving operation.

FIG. 3 is a flowchart for explaining a transmission operation.

[Explanation of symbols]

 1 line I / F unit 2 dial information detection unit 3 video / audio codec 4 ID generation unit 5 ID detection unit 6 connection control unit 7 connection monitoring timer 8 dial information storage unit 9 camera 10 monitor 11 speaker 12 microphone 21 I / F unit 22 Control unit 23 Input / output unit

Claims (2)

(57) [Claims] 1. An image communication terminal device for transmitting and receiving image data via a communication line, the image communication terminal device comprising: ID generating means for generating a first identification code; and the first identification code for the image data. Image data mixing means for inserting into the image data, ID detecting means for extracting the second identification code mixed in the image data from the received image data, storage means for storing the third identification code, Comparing means for comparing whether or not the second identification code and the third identification code are the same, a connection time monitoring timer for measuring a connection time after being accessed through the communication line, and for the access. A connection control unit that determines whether a response is possible and controls a communication operation based on the determination, until after the second identification code is extracted by the ID detection unit after transmitting the first identification code. time of And the connection time monitoring timer measures a time b until the same identification code is received when the second identification code is not the same as the third identification code, and the time a is a predetermined time A. The image communication terminal device is characterized in that it waits for incoming image data in which a proper identification code is inserted in a mute state until the time b reaches a predetermined time B. 2. The connection control means, when the time a reaches a predetermined time A or a time b reaches a predetermined time B, interrupts the mute state, refuses access, and then performs subsequent communication. The image communication terminal device according to claim 1, wherein the image communication terminal device is cut off.