JP2007235549A - Communication terminal apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication terminal apparatus such as a facsimile machine capable of more positively transmitting and receiving image data. <P>SOLUTION: A facsimile machine 20 on a transmitter side is provided with a RAM 7 for storing a standard EQM (eye quality monitor) table 7a including a mean value and variation in standard EQM values per transmission rate; and a destination-specific EQM table 7b including a mean value and variation in EQM values, a mean value and variation in EQM values received from an opposite party's facsimile machine, of facsimile-received image data in the opposite party's facsimile machine and a transmission rate at that time per destination. A main control section 1 performs control so that the transmission rate is decided by comparing a mean value and variation in EQM values corresponding to a destination of another facsimile transmission which are stored in the destination-specific EQM table 7b in the other transmission with a mean value and variation in standard EQM values which are stored in the standard EQM table 7a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication terminal device such as a facsimile machine.

  A conventional facsimile apparatus having a G3 protocol function and capable of setting a transmission level according to a destination at the start of transmission is known. In the facsimile apparatus of the conventional example, the called side has a V21 level measuring unit that measures modem part information including the AGC value and the EQM value based on the V21 signal transmitted from the calling side. It is added to the MCF signal and transmitted to the originating side. In addition, it has a memory unit for storing the modem unit information and the called number transmitted from the called side, and when calling and transmitting to the same called number again, based on the modem unit information corresponding to the called number, Sets the transmission level and communication speed of the V21 signal and carrier signal.

JP 2002-094757 A.

  However, in the conventional facsimile apparatus, the modem unit information stored in the memory unit is not the line quality information based on the image data, so it is possible to receive low-quality image data depending on the line conditions during communication. There was a problem of having sex.

  An object of the present invention is to solve the above problems and provide a communication terminal device such as a facsimile device that can transmit and receive image data more reliably.

  The communication terminal device according to the first invention is: (a) a first table including standard EQM (eye quality monitor) values for each transmission rate; and (b) received from the communication terminal device of the other party. A storage means for storing a second table including, for each destination, data of an EQM value of image data received by facsimile in the communication terminal device of the other party and the transmission speed at that time; In facsimile transmission, by comparing the EQM value and transmission rate corresponding to the destination of the other facsimile transmission stored in the second table with the standard EQM value stored in the first table. Control means for controlling to determine the transmission rate is provided.

  In the communication terminal apparatus, the data of the EQM value of the image data received by facsimile in the counterpart communication terminal apparatus is data transmitted and received from the counterpart communication terminal apparatus by a facsimile procedure signal. It is characterized by.

  The communication terminal device according to the second invention measures the EQM value of the image data when receiving the image data from the communication terminal device of the counterpart, and uses the data of the measured EQM value as the communication terminal of the counterpart Control means for controlling to be sent out to the apparatus is provided.

  Therefore, according to the communication terminal apparatus according to the present invention, the image data can be transmitted more reliably by determining the communication speed based on the EQM (eye quality monitor) value at the time of image data reception. Further, the EQM value of the received image data is included in the facsimile procedure signal and sent out, so that the EQM value is easily notified from the receiving side to the transmitting side. By determining the communication speed based on the EQM (eye quality monitor) value, the communication terminal device on the receiving side can receive the image data more reliably.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In addition, in each following embodiment, the same code | symbol is attached | subjected about the same component.

Embodiment.
FIG. 1 is a block diagram showing a configuration of a facsimile machine 20 according to an embodiment of the present invention. When receiving image data from a destination facsimile machine, the receiving-side facsimile apparatus 20 according to the present embodiment measures the average value and variation of the EQM value of the image data, and measures the average value of the measured EQM value. And the variation is controlled to be sent to the facsimile machine of the destination.

  Further, the facsimile machine 20 on the transmission side includes (a) a standard EQM table 7a including an average value and variations of standard EQM (eye quality monitor) values for each transmission speed, and (b) a facsimile machine at the other end. Average EQM value and variation of received EQM values, each of which includes the average value and variation of the EQM value of image data received by facsimile in the destination facsimile machine and the transmission speed at that time for each destination The main controller 1 includes a RAM 7 for storing the table 7b, and the main control unit 1 in the other facsimile transmission stores the average value and variation of the EQM value corresponding to the destination of the other facsimile transmission stored in the destination EQM table 7b. By comparing the transmission rate with the average value and variation of standard EQM values stored in the standard EQM table 7a. And controls to determine the feed rate. Here, the average value and the variation of the EQM value of the image data received by facsimile at the counterpart facsimile machine are data received and transmitted from the counterpart facsimile machine by an MCF signal (message confirmation signal).

  In FIG. 1, a facsimile machine 20 includes a main control unit (CPU) 1, an image reading unit 2, an image recording unit 3, a display unit 4, an operation unit 5, a ROM 6, a RAM 7, and an image memory 8. The fax modem 10, an NCU (Network Control Unit) 11, and a LAN interface circuit 12 are configured. Each of the components 1 to 12 is connected to each other via a bus 13. The NCU 11 is connected to a counterpart facsimile machine via a public telephone line L.

  The facsimile machine 20 has a facsimile communication function such as a conventional G3 system. Specifically, the main control unit 1 is composed of a CPU (Central Processing Unit), and is connected to the following hardware units via the bus 13 to control them. Perform software functions.

  The image reading unit 2 reads a document with a scanner using a CCD or the like, and outputs dot image data changed to black and white. The image recording unit 3 is an electrophotographic printer or the like, and prints out image data received from another facsimile apparatus by facsimile communication as a hard copy and records it. The display unit 4 is a display device such as a liquid crystal display device (LCD) or a CRT display, and displays the operation state of the facsimile device 20 and the image data of the original to be transmitted and the received image data.

  The operation unit 5 includes character keys necessary for operating the facsimile apparatus 20, a dial keypad, a speed dial key, a one-touch dial key, various function keys, and the like. In addition, you may comprise so that a part or all of the various keys of this operation part 5 may be substituted by making the above-mentioned display part 4 into a touch panel system.

  The ROM 6 stores in advance various software programs that are necessary for the operation of the facsimile apparatus 20 and are executed by the main control unit 1. Here, the programs include at least the facsimile transmission process of FIG. Includes programs for facsimile reception processing. A RAM 7 (Random Access Memory) is configured by an SRAM (Static Random Access Memory), a flash memory, or the like, and is used as a working area of the main control unit 1 to store temporary data generated when a program is executed. When a flash memory is used as the RAM 7, the contents of the data are not lost even when the power is cut off due to a power failure, movement of the device, or the like. The image memory 8 includes a DRAM (Dynamic Random Access Memory) or the like, and stores image data to be transmitted or received image data. Note that the RAM 7 and the image memory 8 may be constituted by a hard disk memory.

  Here, the RAM 7 stores the standard EQM table 7a in FIG. 2 and the destination-specific EQM table 7b in FIG. As shown in FIG. 2, the standard EQM table 7a stores average values and variations of EQM (Eye Quality Monitor) values for each transmission mode and transmission speed. The standard EQM table 7a is stored in advance in the RAM 7 in which each transmission mode and transmission speed is associated with the average value and variation of standard EQM values when good facsimile communication is performed in the transmission mode and transmission speed. It is a stored table. The variation in the EQM value is a difference between the maximum EQM value and the minimum EQM value. As shown in FIG. 3, the destination-specific EQM table 7b stores the average value of the EQM value, the variation in the EQM value, the transmission mode, and the transmission rate for each destination. The destination-specific EQM table 7b stores, in facsimile communication, the average value and variation of the EQM values transmitted from the counterpart facsimile machine, and the transmission mode and transmission speed at that time in association with each destination.

  The fax modem 10 is a modem that is connected to the public telephone line L via the NCU 11 and has a function of a fax modem for normal facsimile communication. The fax modem 10 receives outgoing telephone number information received as an FSK signal (frequency shift keying signal). Data is demodulated and output to the main control unit 1. The NCU 11 is a hardware circuit that performs closing and opening operations such as a DC loop of the analog public telephone line L and has an automatic dial function, and connects the fax modem 10 to the public telephone line L as necessary. Here, the NCU 11 detects the ID receiving terminal activation signal and the normal telephone call signal in the outgoing telephone number notification service, and transmits the primary response signal and the secondary response signal in the outgoing telephone number notification service as necessary. can do. The NCU 11 may be connected to a digital line of a baseband transmission system such as an ISDN line via a predetermined terminal adapter and a DSU (Subscriber Line Termination Unit: Digital Service Unit).

  The facsimile apparatus 20 of the present embodiment configured as described above has a normal facsimile communication function such as the G3 method. In the facsimile communication function, the dot image data read by the image reading unit 2 is encoded by software in accordance with an encoding method such as MH, MR, or MMR defined in the facsimile communication standard, and then the counterpart facsimile machine On the other hand, the encoded data received from the facsimile machine of the other party is also converted into image data by software and output as a hard copy from the image recording unit 3. The image memory 8 stores the image data as necessary, and conversely outputs the stored image data as necessary.

  Furthermore, V.C. is capable of high-speed data communication such as facsimile communication. A 34-mode communication procedure will be described. When data communication is performed with a communication terminal device such as a facsimile machine, the recommendation V. of ITU-T (International Telecommunication Union-Telecommunication Standardization Sector) of the half duplex method, for example. The modem uses a modem that conforms to the 17-mode communication procedure, etc., and is a G3 standard facsimile communication procedure. Follow the procedure specified in 30. Also, the recommendation V.I. An ultra-high speed communication procedure (hereinafter referred to as a V.34 mode communication procedure) with a maximum transmission rate of 33.6 kbps conforming to the standard No. 34 has been put into practical use. In the 34-mode communication procedure, at the time of starting communication and during communication execution, the receiving side designates the communication speed according to the line status at that time, specifically, S / N (signal to noise power ratio) and bandwidth. It is possible for the transmission side to change the communication speed so that transmission is performed at the communication speed specified on the reception side. V. In the case of performing data communication in the 34-mode communication procedure, the same recommendation V. The actual communication speed is determined by performing the pre-procedure in 8 communication procedures.

  FIG. 4 is a flowchart showing a facsimile transmission process executed by the main control unit 1 of the facsimile apparatus 20 of FIG.

  In step S11 of FIG. 4, it is determined whether or not a facsimile transmission event has occurred due to a user operation. If YES, the process proceeds to step S12. If NO, the process returns to step S11 to repeat the process. In step S12, after being off-hooked, the destination is dialed to make a call to the destination to which image data is to be transmitted. In step S13, a CNG signal (calling tone) is transmitted and a CED signal (called station confirmation signal) is received. In step S14, an NSF signal (non-standard device signal) and a DIS signal (digital identification signal) are received, and a TSI signal (transmission station identification signal) and a DCS signal (digital command signal) are transmitted. In step S15, the standard EQM table 7a and the destination-specific EQM table 7b are compared to determine the transmission mode and transmission speed, and the training process is executed. Specifically, the transmission mode and transmission speed corresponding to the dialed destination are read from the destination-specific EQM table 7b, and the average value and variation of the EQM values are read out, and the read transmission mode and transmission speed are read out in the standard EQM table 7a. The average value and variation of the standard EQM values corresponding to are read out. When the average value and variation of the EQM values read from the destination-specific EQM table 7b are smaller than or equal to the average value and variation of the EQM values read from the standard EQM table 7a, the destination facsimile is used in the transmission mode and transmission speed. On the other hand, if the average EQM value read from the standard EQM table 7a and the variation are larger, the communication speed is lowered by one step and the communication with the partner facsimile machine is performed. Note that the average value and the variation of the EQM value each indicate a transmission state where the line quality is good as the value is small, and the transmission state where the line quality is poor as the value is large. In step S16, a CFR signal (reception preparation confirmation signal) is received. In step S17, image data is transmitted using the determined transmission mode and transmission speed. In step S18, the MCF signal is received, the EQM data in the MCF signal (message confirmation signal) is extracted, the EQM data, that is, the average value and variation of the EQM value, and the transmission mode and transmission at the time of transmitting the image data. The speed is associated with the destination indicating the destination facsimile machine and is overwritten and stored in the destination-specific EQM table 7b. In step S19, it is determined whether or not there is a next page. If YES, the process returns to step S17 to repeat the process. If NO, the process proceeds to step S20. In step S20, the line is released, and then the process returns to step S11 to repeat the process.

  FIG. 5 is a flowchart showing a facsimile reception process executed by the main control unit 1 of the facsimile apparatus 20 of FIG.

  In step S1 of FIG. 5, it is determined whether or not an incoming call is received. If YES, the process proceeds to step S2, while if NO, the process returns to step S1 to repeat the process. In step S2, a CNG signal is received and a CED signal is transmitted. In step S3, an NSF signal and a DIS signal are transmitted, and a TSI signal and a DCS signal are received. In step S4, a training process is performed to determine a transmission mode and a transmission speed between the facsimile machine 20 and the counterpart facsimile machine. In step S5, a CFR signal is transmitted. In step S6, image data is received, EQM is sampled and measured, and EQM measurement data for a predetermined period is temporarily stored in RAM7. In step S7, the average value and variation of the EQM are calculated based on the EQM measurement data. In step S8, EQM data including the calculated average value and variation of EQM is inserted into the MCF signal, and the MCF signal is transmitted. In step S9, it is determined whether or not there is a next page. If YES, the process returns to step S6 to repeat the process. If NO, the process proceeds to step S10. In step S10, the line is released, and then the process returns to step S1 to repeat the process.

  As described above, according to the facsimile apparatus 20 on the transmission side according to the present embodiment, the facsimile apparatus 20 on the transmission side can determine (a) an average value of standard EQM (eye quality monitor) values for each transmission speed. And the standard EQM table 7a including the variation, and (b) the average value and variation of the EQM values received from the counterpart facsimile machine, and the EQM value of the image data received by the facsimile at the counterpart facsimile machine A RAM 7 is provided for storing a destination-specific EQM table 7b including an average value and variation and a transmission speed at that time for each destination. The main control unit 1 stores the destination-specific EQM table 7b in another facsimile transmission. The standard EQM table 7a shows the average value and variation of the EQM value corresponding to the destination of the other facsimile transmission and the transmission speed. By comparing the mean value and the variation of the stored standard EQM value and controls to determine the transmission rate. Here, the average value and the variation of the EQM value of the image data received by facsimile at the counterpart facsimile machine are data received and transmitted from the counterpart facsimile machine by an MCF signal (message confirmation signal). Therefore, the image data can be transmitted more reliably by determining the communication speed based on the EQM (eye quality monitor) value at the time of receiving the image data.

  Further, when receiving the image data from the counterpart facsimile machine, the receiving side facsimile apparatus 20 measures the average value and variation of the EQM value of the image data, and calculates the average value and variation of the measured EQM value. Control is made so that the data is sent to the facsimile machine of the other party. Therefore, the EQM value of the received image data is included in the message confirmation signal and transmitted, so that the EQM value is easily notified from the receiving side to the transmitting side. By determining the communication speed based on the EQM (eye quality monitor) value, the facsimile machine 20 on the receiving side can receive the image data more reliably.

  In the present embodiment, the EQM data including the average value and variation of the EQM of the image data received from the other party's facsimile apparatus is inserted and transmitted in the MCF signal. However, the present invention is not limited to this configuration. Alternatively, the EQM data including the average value and variation of the EQM of the image data may be transmitted after being inserted or added to a facsimile procedure signal other than the MCF signal.

  As described above in detail, according to the communication terminal device of the present invention, image data can be transmitted more reliably by determining the communication speed based on the EQM (eye quality monitor) value at the time of image data reception. Can do. Further, the EQM value of the received image data is included in the facsimile procedure signal and sent out, so that the EQM value is easily notified from the receiving side to the transmitting side, and thereby the EQM (eye quality monitor) at the time of receiving the image data. By determining the communication speed based on the value, the image data can be received more reliably.

1 is a block diagram illustrating a configuration of a facsimile machine 20 according to an embodiment of the present invention. It is a figure which shows an example of the standard EQM table 7a stored in RAM7 of FIG. It is a figure which shows an example of the EQM table 7b classified by destination stored in RAM7 of FIG. 2 is a flowchart showing a facsimile transmission process executed by a main control unit 1 of the facsimile apparatus 20 of FIG. 3 is a flowchart showing a facsimile reception process executed by a main control unit 1 of the facsimile apparatus 20 of FIG.

Explanation of symbols

1 ... main control unit (CPU),
2. Image reading unit,
3 ... image recording unit,
4 ... display part,
5 ... operation part,
6 ... ROM,
7 ... RAM,
7a: Standard EQM table,
7b ... Destination-specific EQM table,
8 ... Image memory,
10. Fax modem,
11 ... NCU,
12 ... LAN interface circuit,
13 ... Bus
20 ... facsimile machine,
L: Public telephone line.

Claims (3)

(A) a first table containing standard EQM (eye quality monitor) values for each transmission rate;
(B) data received from the communication terminal device of the other party, including the data of the EQM value of the image data received by facsimile in the communication terminal device of the other party and the transmission speed at that time for each destination Storage means for storing two tables;
In another facsimile transmission, the EQM value and transmission rate corresponding to the destination of the other facsimile transmission stored in the second table are compared with the standard EQM value stored in the first table. A communication terminal apparatus comprising control means for controlling to determine the transmission rate.   2. The data of an EQM value of image data received by facsimile in the communication terminal device of the other party is data transmitted and received from the communication terminal device of the other party by a facsimile procedure signal. Communication terminal device. Control means for controlling to measure the EQM value of the image data and to send the measured EQM value data to the communication terminal device of the other party when receiving the image data from the communication terminal device of the other party A communication terminal device comprising the communication terminal device.

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