KR101449783B1 - Method for transmitting/receiving facsimile data and telephone communication simultaneously and ip-based phone for the same - Google Patents

Abstract

A method and an IP telephone for sending and receiving fax data during a call are disclosed. The transmitting side of the IP telephone transmitting the facsimile data when making a telephone call divides the pre-allocated broadband voice band into the first band and the second band, assigns the voice data to the first band, 2, the voice data of the first band and the fax data of the second band are synthesized and transmitted as a signal of a wide band format. The receiving side of the IP telephone receiving the fax data upon telephone conversation receives the signal of the wide band format and outputs the voice data assigned to the first band by voice and converts the fax data allocated to the second band into the image output format And outputs it to the screen.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and apparatus for simultaneously transmitting and receiving a fax data,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IP telephone, and more particularly, to a method of transmitting and receiving a facsimile (hereinafter simply referred to as 'fax') data during an Internet Protocol (IP) telephone.

The main function of the facsimile machine is to convert the image information of the input message into electrical signals using light, convert the signals into compressed data, and transmit the compressed data to the other party using a telephone line. In addition, since a facsimile apparatus is provided with a telephone, it is generalized that a document can be transmitted and received as well as a general telephone can be performed. That is, the facsimile apparatus interlocks with the telephone to transmit / receive facsimile data, and to perform voice communication through the telephone. Therefore, in a typical home or office, one telephone and one fax device are connected to each other without using a separate telephone, and the fax data transmission mode or the voice communication mode is used alternately as needed.

The facsimile apparatus dials the facsimile data to be transmitted with the other facsimile number while the person (sender) and the person (receiver) to transmit both have a separate facsimile apparatus. At this time, the sender must wait for the call or line to separately check whether the recipient has received the fax data. It takes a lot of time depending on the situation, and it is troublesome to retransmit.

Conventionally, both a sender and a receiver must have a facsimile apparatus in order to transmit facsimile data. The sender must confirm whether the facsimile data has been received by the receiver or the resolution of the received facsimile data through a separate call or line There is an inconvenience to do. That is, real-time confirmation of fax data was difficult.

It is an object of the present invention to provide a method for transmitting and receiving fax data during a call and an IP telephone for the method.

According to one aspect of the present invention, a method for transmitting and receiving fax data during a call and an IP telephone for the same are disclosed. The transmitting side of the IP telephone transmitting the facsimile data when making a telephone call divides the pre-allocated broadband voice band into the first band and the second band, assigns the voice data to the first band, 2, the voice data of the first band and the fax data of the second band are synthesized and transmitted as a signal of a wide band format. The receiving side of the IP telephone receiving the fax data upon telephone conversation receives the signal of the wide band format and outputs the voice data assigned to the first band by voice and converts the fax data allocated to the second band into the image output format And outputs it to the screen.

According to the present invention, since facsimile data can be transmitted and received during a call through an IP telephone, it is possible to overcome the disadvantages of the existing facsimile apparatus and not only use a high speed and wide bandwidth telephone for the purpose of voice transmission, So that the satisfaction of the user can be increased. In addition, since the IP telephone is free to interwork with the PC, the user can view the data transmitted or received by connecting the PC data with the IP telephone without a separate facsimile machine. Also, since the present IP telephone provides a lot of USB ports, a separate USB scanner or a copier can be connected to transmit or print the data in real time.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing the configuration of an IP telephone transmitter for transmitting facsimile data during a call according to an embodiment of the present invention; Fig.
2 is a diagram illustrating a configuration of an IP telephone receiver for receiving fax data during a call according to an embodiment of the present invention;
3 is a diagram illustrating a process of transmitting wideband data;
4 is a diagram illustrating a process of transmitting voice and fax data according to an embodiment of the present invention.
FIG. 5 illustrates a process of receiving voice and fax data according to an embodiment of the present invention; FIG.
6 illustrates a method for transmitting fax data during a call according to an embodiment of the present invention.
7 illustrates a method of receiving fax data during a call according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions will not be described in detail if they obscure the subject matter of the present invention.

A technology that enables a voice call using the Internet, which is a packet switched network, in place of a circuit switched network type telephone can be defined as Voice Over Internet Protocol (VoIP). That is, the VoIP technology is a communication service technology that enables voice data encoded with an analog voice signal to be packetized based on an Internet protocol, thereby enabling communication of quality equal to or superior to that of a public switched telephone network (PSTN) to be. The VoIP service is advantageous in that it can be used simultaneously by multiple users and is excellent in scalability as compared with a general telephone service, and is advantageous in that the price is much lower than that of a conventional telephone, so that the VoIP service is spread widely in the market, As well.

Currently, VoIP protocols such as H.323, Session Initiation Protocol (SIP), Media Gateway Control Protocol (MGCP), and Media Gateway Control Protocol (MEGACO) Protocol or H.323. With the introduction of VoIP technology, fax transmission technology, which is a technology for delivering scanned document images through PSTN, needs to be merged with VoIP service.

For example, facsimile over IP (FoIP) technologies that relays the T.30 protocol of International Telecommunication Unio-Telecommunications (ITU-T), which defines protocols between G3 fax devices via the PSTN, over the Internet. 37 and T.38 protocols, such as the fax relay protocol, have emerged due to this need.

Therefore, in the present invention, an IP telephone having a wideband voice band can transmit and receive a fax in real time during a call. (Upper frequency band) of a broadband is used as a fax data transmission band according to a specific instruction of a user during an IP telephone call, and a lower channel (lower frequency band) of a broadband is used as a voice data transmission band during fax data transmission . As a result, the fax data is transmitted in real time over the upper frequency band while making a call in a narrowband.

Here, the specific command of the user refers to a command for transmitting a fax data transmission mode key (hereinafter referred to as a " fax data transmission mode "), which is separately provided during a call, in order to switch to a mode capable of transmitting fax data during a call (E.g., 0 to 9, #, *, etc.) during a call, or by selecting a corresponding mode through a menu during a call.

An IP telephone that supports wideband includes a transmitting unit (see Fig. 1 below) for transmitting facsimile data in addition to voice data during a call, a receiving unit for receiving facsimile data in addition to voice data during a call ). Hereinafter, a person who transmits fax data during a call is defined as a 'sender', and a person who receives fax data during a call is defined as a 'recipient'.

FIG. 1 is a diagram illustrating a configuration of an IP telephone transmitter for transmitting fax data during a call according to an embodiment of the present invention. FIG. 4 is a diagram illustrating a process of transmitting voice and fax data according to an embodiment of the present invention.

The transmitting unit of the IP telephone transmitting the facsimile data when making a telephone call divides the pre-allocated broadband voice band into a first band (e.g., a lower frequency band of a broadband) and a second band (e.g., a higher frequency band of a broadband) The voice data of the first band and the fax data of the second band are synthesized and transmitted as a signal of a wide band format. When the facsimile data is transmitted during the telephone conversation, the voice data, which is transmitted in the broadband before the facsimile data transmission, is switched to the narrowband first band when the facsimile data is transmitted. When the transmission of the facsimile data is completed, the voice data which has been converted into the narrow band and transmitted is converted (returned) to the original wide band.

Specifically, the IP telephone transmitting unit includes an audio input unit 11 for receiving a voice of a sender input through a transmitter (microphone), a facsimile image data input unit 11 for receiving image data such as a document, A signal conversion unit 13 for converting the fax image data into an upper frequency band, a voice conversion unit 12 for synthesizing the voice data in a lower frequency band of a narrow band and the fax image data in an upper frequency band, And a wideband encoding unit 15 for encoding and transmitting the composite signal in a wide band.

Since image data for facsimile transmission can be interfaced with a PC in the case of an IP telephone, image data in the form of picture files can be received from a PC or input via a scanner that can be connected to a USB port provided by an IP telephone. The data thus transmitted is passed through a signal conversion unit 13 for allocating the data to an upper frequency band of a wideband. The voice data in the lower frequency band and the fax data in the upper frequency band are synthesized by the signal synthesizing unit 14, encoded by the wideband encoding unit 15, and then transmitted to the opposite side IP telephone through the network.

The IP telephone usually has a wideband voice band as shown in FIG. If a specific command is input by the sender who wants to transmit the fax data, the mode is switched to the fax data transmission mode during the call. When the facsimile data transmission mode is active during communication, as shown in FIG. 4, when the fax data is transmitted, the pre-allocated broadband voice band is divided into the first band (upper frequency band) and the second band (4b). The voice data and the fax data are synthesized with the PCM format data so that the frequency band is divided into the frequency bands And transmits the separated broadband format signal 4c.

Referring to FIG. 6, a method of transmitting facsimile data during a call will be described below.

Using an IP telephone that supports wideband, the user forms a broadband communication path and proceeds with the call (601, 602).

When a sender who wishes to transmit fax data during a call enters a specific command (603), the mode is switched to the fax data transmission mode during the call so that the sender can send the fax data during the call and the recipient can receive the fax data .

When the receiving side is ready to receive fax data during a call (604), the currently allocated broadband voice band is changed to narrowband (605). At this time, the signal combining unit 14 changes the voice data of the sender input through the microphone (transmitter) in the wide band into a narrow band and allocates the voice data to the lower frequency band. In addition, it is possible to selectively allocate the upper frequency band in the wide band. Or masking the upper frequency band.

The sender selects fax data to be transmitted during the call (606). Then, the signal combining unit 14 assigns the fax data to the upper frequency band and synthesizes the fax data with the voice data allocated to the lower frequency band (607). The combined fax + voice data is transmitted in broadband format via wideband encoding (608).

When the transmission of the fax data is completed (609), the receiver can notify the reception of the fax data or the resolution of the received fax data through the telephone call (610). At this time, the voice band converted into the narrowband is switched back to the wideband (611).

When the call is terminated (612), the call set to the broadband is released (613).

FIG. 2 is a diagram illustrating a configuration of an IP telephone receiver for receiving fax data during a call according to an exemplary embodiment of the present invention. FIG. 5 is a diagram illustrating a process of receiving voice and fax data according to an exemplary embodiment of the present invention.

The receiving unit of the IP telephone receiving the fax data at the time of telephone communication receives the signal of the wide band format (divided into the upper frequency band and the lower frequency band), and outputs the voice data allocated to the first band (lower frequency band) , The facsimile data assigned to the second band (upper frequency band) is converted into the image output format and is output on the screen.

Specifically, the IP telephone receiver includes a wideband decoding unit 21 for decoding a signal of the received wideband format, a signal distributing unit 21 for separating the decoded wideband format signal according to a frequency band (upper frequency band and lower frequency band) A voice output unit 23 for voice outputting voice data of a lower frequency band through a receiver (speaker), a signal converting unit 24 for converting the fax data of an upper frequency band into a signal, And a facsimile image data output unit 25 for converting the facsimile data into an image output format and displaying it on the screen through display.

When receiving the fax data, the IP telephone receives the broadband format signal 5a in which the frequency band is divided as shown in FIG. 5 when receiving the fax data, The voice data 5b allocated to the first band and the fax data 5c allocated to the second band (upper frequency band) are distinguished from each other and the voice data 5b of the first band is output by voice, The data 5c is displayed on the screen.

Referring to FIG. 7, a method of receiving fax data during a call will be described below.

Using an IP telephone that supports wideband, the user forms a broadband communication path and proceeds with the call (701, 702).

When a sender who wishes to transmit fax data during a call enters a specific command (703), the mode is switched to the fax data transmission mode during the call so that the sender can send the fax data during the call and the recipient can receive the fax data .

When the transmitting side is ready to transmit fax data during a call (704), the voice band of the currently allocated wide band is changed to narrowband (705).

Thereafter, the decoding unit 21 decodes the received wideband format signal into a designated codec, and the signal distribution unit 22 separates the voice data of the upper frequency band and the fax data of the lower frequency band from the decoded wideband format signal (706). At this time, the voice data is outputted to the receiver (speaker), and the fax data is outputted on the screen after signal conversion. If a fax output port is connected (707), fax data is output to the device to which the port is connected. That is, the output of the facsimile data can be outputted through a copier connected to a USB port provided by a PC or an IP telephone interlocked with the IP telephone. This enables reception of fax data during a call (708).

When the reception of the fax data is completed (709), the receiver can notify the sender of the reception of the fax data or the resolution of the received fax data through the telephone conversation with respect to the received fax data. At this time, the voice band that has been converted into the narrowband is switched to the wideband again (710).

When the call is terminated (711), the call set to the broadband is released (712).

Although the method has been described through particular embodiments, the method may also be implemented as computer readable code on a computer readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may be implemented in the form of a carrier wave (for example, transmission over the Internet) . In addition, the computer-readable recording medium may be distributed over network-connected computer systems so that computer readable codes can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the above embodiments can be easily deduced by programmers of the present invention.

Although the present invention has been described in connection with some embodiments thereof, it should be understood that various changes and modifications may be made therein without departing from the spirit and scope of the invention as understood by those skilled in the art. something to do. It is also contemplated that such variations and modifications are within the scope of the claims appended hereto.

11: voice input unit 12: fax image data input unit
13, 24: signal converting section 14:
15: Broadband encoding section 21: Broadband decoding section
22: Signal distributor 23: Audio output
25: Fax image data output section

Claims (10)

A method of transmitting facsimile (hereinafter referred to as "fax") data during a telephone call through an IP telephone,
Dividing a pre-allocated broadband voice band into a first band and a second band;
Assigning voice data to the first band;
Converting the fax data signal and assigning the fax data to the second band; And
And synthesizing the voice data allocated to the first band and the fax data allocated to the second band and transmitting the synthesized voice data in a broadband format signal,
Wherein the voice data is switched from the wide band to the first band in the narrow band when the fax data is transmitted and returned to the wide band upon completion of transmission of the fax data. The method according to claim 1,
Wherein the first band is a lower frequency band of the wideband,
Wherein the second band is the upper frequency band of the wideband. 3. The method according to claim 1 or 2,
Wherein the fax data is image data input through a PC connected to the IP telephone, or a scanner connected to a USB port. delete A method of receiving facsimile (hereinafter referred to as "fax") data during telephone communication via an IP telephone,
Receiving a signal in a broadband format;
Outputting voice data assigned to a first band of the signals of the wideband format; And
Converting the fax data allocated to the second band of the signals of the wideband format into an image output format and outputting the converted image data to an image output format,
Wherein when transmitting the broadband format signal, the voice data is switched from the wide band to the first band in the narrow band when the fax data is transmitted, and returned to the wide band upon completion of transmission of the fax data. 6. The method of claim 5,
Wherein the first band is a lower frequency band of the wideband,
Wherein the second band is the upper frequency band of the wideband. The method according to claim 5 or 6,
And outputting the fax data allocated to the second band to an external device associated with the IP telephone. An IP telephone for transmitting and receiving facsimile data (hereinafter referred to as " facsimile ") data during telephone communication,
The voice band of the pre-allocated wide band is divided into the first band and the second band, voice data is allocated to the first band, the fax data is converted into signals and allocated to the second band, A transmission unit for synthesizing the voice data and the fax data of the second band and transmitting the synthesized voice data in a broadband format signal; And
And a receiver for receiving the signal of the wide band format and outputting audio data assigned to the first band by voice and converting the fax data allocated to the second band to an image output format and outputting the image data to the image output format,
Wherein when transmitting the broadband format signal, the voice data is switched from the wide band to the first band in the narrow band when the facsimile data is transmitted, and returned to the wide band upon completion of the transmission of the facsimile data, . 9. The method of claim 8,
The transmitter may further comprise:
A voice input unit for receiving a voice of a sender for transmitting the fax data;
A fax image data input unit for receiving the fax data;
A signal converter for converting the fax data into an upper frequency band;
A signal synthesizer for assigning the voice data to a lower frequency band and assigning the fax data to an upper frequency band and synthesizing the same; And
And a wideband encoding unit encoding the synthesized signal into a wideband signal and outputting the combined signal as a signal of the wideband format. 9. The method of claim 8,
The receiver may further comprise:
A wideband decoding unit decoding the received wideband format signal;
A signal distributor for separating signals of the decoded wideband format according to a frequency band;
An audio output unit for audio output of audio data in a lower frequency band;
A signal converting unit for converting signal data of fax data in an upper frequency band; And
And a facsimile image data output unit for converting the signal converted fax data into an image output format and outputting the image to a screen.

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