JP2002084378A - Communication terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication terminal device capable of transmitting/ receiving voice data in a voice data encoding/decoding system which is common between transmission and reception sides among a plurality of systems. SOLUTION: The device at reception side notifies the device at transmission side of a type of voice encoding system corresponding to its own device. The device at the transmission side transmits the voice data with the voice encoding system of the type identical to the type of voice encoding system corresponding to the device at reception side and to the type of voice encoding system corresponding to its own device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal apparatus such as a facsimile apparatus, and more particularly, to a receiving apparatus for transmitting voice data obtained by a transmitting apparatus coding voice in a predetermined voice coding method during communication. The present invention relates to a communication terminal device that transmits and receives audio data from the transmitting device encoded by the predetermined communication audio encoding method while transmitting.

[0002]

2. Description of the Related Art A facsimile apparatus, which is one of the communication terminal apparatuses, is originally an apparatus for transmitting and receiving coded image data. As in the "facsimile apparatus with voice mail function" described in JP-A-5-292222, audio data obtained by A / D conversion of an audio signal is encoded, and audio information can be transmitted and received in the same procedure as image data. A facsimile apparatus has been proposed.

[0003]

However, not only the conventional facsimile apparatus for voice data but also a communication terminal apparatus for voice data, the decoding corresponding to the coding method of voice data created on the transmission side. Because there is no agreement on the receiving side's voice data receiving capability confirmation of whether the receiving side can perform, when transmitting and receiving voice data, the voice data decoding method in the receiving side device is replaced by the voice data decoding system in the transmitting side device. MH encoding method is standard in G3 facsimile, for example, but as an option, an MR coding method with relatively high encoding efficiency is also accepted. One of a plurality of different audio data encoding / decoding methods depends on the cost performance and the receiving side device. Or corresponding to all, at the time of communication of voice data, mutually notify the capability regarding the voice data encoding / decoding method, and select one of the voice data coding / decoding methods corresponding to the common. There is a problem that general-purpose correspondence such as communication of voice data cannot be performed.

[0004] The present invention has been made in view of the above circumstances, and of the plurality of audio data encoding / decoding methods,
It is an object of the present invention to provide a communication terminal device capable of transmitting and receiving voice data in a system in which a transmitting side and a receiving side commonly support.

[0005]

According to a first aspect of the present invention, there is provided a facsimile apparatus in which a transmitting device transmits voice data obtained by encoding voice according to a predetermined voice coding method during communication to a receiving device. A communication terminal device in which the receiving device receives voice data from the transmitting device encoded by the predetermined communication voice coding method, wherein the receiving device includes voice data from the transmitting device. Prior to the start of the reception of the receiving apparatus, the apparatus further comprises a receivable speech coding scheme notifying unit for notifying the transmitting side apparatus of one or more types of speech coding schemes supported by the apparatus by a predetermined notification procedure. Prior to the start of transmission of voice data to the receiving device, the transmitting device is notified by the predetermined notification procedure from the receiving device according to the predetermined notification procedure. A voice coding scheme setting unit configured to set, as the communication voice coding scheme, a voice coding scheme of a type common to one or more types of voice coding schemes supported by the own apparatus, Setting means for notifying the receiving side apparatus of the type of the voice coding scheme set as the communication voice coding scheme by the voice coding scheme setting means to the receiving side apparatus; It is characterized in that voice communication can be performed in a voice coding method that both the side devices support.

A facsimile apparatus according to a second aspect of the present invention is the communication terminal apparatus according to the first aspect, wherein the transmitting side apparatus corresponds to the receiving side apparatus notified by the receiving side apparatus by the predetermined notification procedure. There is no type of speech coding scheme common to the type of speech coding scheme used and one or more types of speech coding schemes supported by the own apparatus. When the communication coding method cannot be set, an audio signal transmitting means for transmitting a raw audio signal as it is to the receiving side device is further provided.

A facsimile apparatus according to a third aspect of the present invention is the communication terminal apparatus according to the second aspect, wherein the receiving-side apparatus responds to a raw voice signal transmitted from the transmitting-side apparatus. And a receiving voice coding / storing means for storing the data in a memory after coding by the voice coding method.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described in detail.

First, FIG. 1 shows a block configuration of a facsimile apparatus 1 according to an embodiment of the present invention.

In FIG. 1, a facsimile apparatus 1 includes a system control unit 2, a ROM 3, a RAM 4, a scanner 5, a plotter 6, a storage memory 7, a voice encoding / decoding unit 8, an encoding / decoding unit 9, an operation display unit 10. , A modem 11, a network control unit 12, a speaker 13, a microphone 14, and a system bus 14.

The system control unit 2 is a microcomputer that controls each unit of the apparatus according to a control program written in the ROM 3 while using the RAM 4 as a work area.

As described above, the ROM 3 is a read-only memory in which a control program for the system control section 2 to control each section of the apparatus is stored. RAM4
Is a random access memory used as a work area of the system control unit 2 as described above.

The scanner 5 has 3.85 lines / mm, 7.7
This is for obtaining image information by reading a document image at a predetermined reading line density such as book / mm and 15.4 book / mm. The plotter 6 is for recording and outputting the received image information according to its line density, and for recording and outputting (copying operation) the image information read by the scanner 5 according to its line density.

The storage memory 7 is a memory for temporarily storing transmitted and received image data and audio data until they are processed.

The voice coding / decoding section 8 converts a raw voice signal input from the microphone 14 via the network control section 12 into an A / D signal.
While converting into raw audio data and encoding and compressing it with a predetermined audio encoding system, the audio data encoded and compressed with a predetermined audio encoding system is decoded and expanded with a corresponding decoding system. Return to the original raw audio data and D /
The A-converted signal is converted back to the original raw audio signal, and output to the speaker 13 or the line via the network control unit 12. In addition,
In the present embodiment, the predetermined voice coding method supported by the voice coding / decoding unit 8 is ADPCM-16k.
bps, ADPCM-32 kbps, and LD-CE
It is assumed that it corresponds to LP-16 kbps.

The encoding / decoding unit 9 converts the transmission image data into
While encoding and compressing with a predetermined coding method such as an MH coding method, an MR coding method, and an MMR coding method conforming to G3 facsimile, the received image data is subjected to an MH coding method.
The decoding is performed by a predetermined decoding method corresponding to the MR coding method, the MMR coding method, or the like.

The operation display unit 10 is provided with a numeric keypad for designating a destination facsimile number, a transmission start key, a one-touch dial key, and various other keys, and includes a display such as a liquid crystal display device. It displays the operating state of the device to be notified to the user and various messages.

The modem 11 is a G3 facsimile modem that modulates transmission data to be transmitted through the public network via the network control unit 13 and demodulates a signal received from the public network via the network control unit 12. is there. Also, the modem 11
Also transmits a DTMF signal corresponding to the dialed number. The network control unit 12 is connected to a public network, and controls connection with the line such as closing / opening of a DC loop of the line, detection of inversion of the line polarity, detection of a busy tone, detection of line release, and dial pulse. Is generated. The network control unit 12 controls the switching of the line of the public network to the modem 12, the voice encoding / decoding unit 8 or the speaker 13, and controls the microphone 14 of the public network under the control of the system control unit 2. The switching control to the line or the voice encoding / decoding unit 8 is performed. The system bus 15 is a signal line through which the above-described units exchange data.

Next, an example of a communication sequence in the case where the facsimile apparatus 1 having the above-described configuration serves as a receiving side and a transmitting side to perform facsimile communication involving transmission and reception of voice data will be described with reference to FIG.

In FIG. 1, first, the transmitting side calls the receiving side (phase F1). The receiving side responds to the call (Phase F1) with the called station identification signal CED (Phase F1).
2). The receiving side sends a non-standard function identification signal NSF to the transmitting side.
/ Transmit digital identification signal DIS (phase F
3).

The transmitting side sets the image coding method and the audio coding within the range of the receiving side capability notified by the non-standard function identification signal NSF from the receiving side in phase F3 and the capability common to its own device. Communication parameters such as the encryption method and modem speed, and the non-standard function setting signal N
The SS is transmitted to the receiving side (phase F4), and the communication parameters are mutually confirmed and set.

It is assumed that the bit definition relating to the speech encoding / decoding method in the information field of the non-standard function identification signal NSF / non-standard function setting signal NSS is as shown in FIG. That is, a specific bit A among the bits constituting the information field is ADPCM-
Indicates whether transmission / reception in the 16 kbps audio encoding / decoding scheme is supported / not supported, and a specific bit B is ADPCM-3.
Indicates whether transmission / reception in a 2 kbps audio encoding / decoding system is supported / not supported, and a specific bit C is LD-CELP-
The transmission / reception of the 16 kbps audio encoding / decoding system is supported / unsupported, and the specific bit D indicates the transmission / reception of an analog raw voice signal without coding.

After the phase F4, the transmitting side sends a training check signal TCF to the receiving side to perform modem training (phase F5), and receives a reception preparation confirmation signal CFR from the receiving side (phase F6). ,
(The audio data or the raw audio signal encoded by the encoding method set in the phase F4 is transmitted to the receiving side (phase F7), and the message end signal EOM is transmitted (phase F8). Is skipped, and the EOM in phase F8 is EOM
In CM (Error Correcting Mode) mode, PPS-
EOP.

The transmission / reception of the audio data / signal is completed as described above, and subsequently, the flow proceeds to the transmission / reception procedure of the image data.

That is, the receiving side transmits a message confirmation signal MCF to the transmitting side (phase F9), and transmits a non-standard function identification signal NSF / digital identification signal DIS (phase F10). A setting signal NSS is transmitted to set communication parameters, and a training check signal TCF is transmitted to perform modem training (phase F12). When a reception preparation confirmation signal CFR is received from the receiving side (phase F1)
3) The image data is transmitted as a facsimile message (phase F14), and a message end signal EOM is transmitted (phase F15). In addition, E of phase F15
OM is PPS-EOP in ECM (Error Correcting Mode) mode.

On the other hand, the receiving side transmits a message confirmation signal MCF (phase F16), and the transmitting side transmits a disconnection command signal DCN (phase F1).
8), the transmission of the image data is also completed.

Next, a transmission processing procedure in the facsimile machine 1 as a transmission side in the communication sequence of FIG. 2 will be described with reference to FIG.

In the figure, the facsimile machine 1 calls the receiving side in response to the phase F1 (step 10).
1) Receive NSF / DIS corresponding to phase F3 (process 102).

Then, the capabilities of the receiving side, including those for the voice coding / decoding system, notified by the NSF in the process 102 are compared with the capabilities of the own device (process 103).
The NSS is set within the range of the common capability, and transmitted to the receiving side corresponding to the phase F4 (process 105).

When the speech encoding / decoding method in the speech communication to be performed is determined in this way,
ADPCM-16 kbps, ADPCM-
32 kbps or LD-CELP-16 kbps
Then, it is determined whether any of the audio encoding / decoding methods has been set (decision 105).

In the decision 105, no speech encoding / decoding method is set, and the "raw speech"
Is set (No in decision 105), the operation of controlling the network control unit 12 to connect the microphone 14 to the public network and transmit the input audio signal from the microphone 14 to the receiving side as it is ( Process 109), and continues until the voice input from the microphone 14 is completed (No in the determination 110).

When the voice input is completed (Yes in decision 110)
s) Next, it is determined whether or not the transmission original is set on the scanner 5 (determination 111). If the transmission original is not set (No in determination 111), the transmission process is terminated. Is set (judgment 11
1), a facsimile transmission process corresponding to phase F9 to phase F18 is performed (process 111).

If it is determined in decision 105 that any of the speech encoding / decoding methods is set (Y in decision 105)
es) The network control unit 12 is controlled so that the raw voice from the microphone 14 is input to the voice encoding / decoding unit 8, and the input voice signal from the microphone 14 is converted to the ADPCM-1.
6 kbps, ADPCM-32 kbps or LD
-CELP-Encodes with a set code or system of 16 kbps (process 106), and transmits the encoded data obtained by the encoding to the modem via the system bus 15 to control the network as modulated data. The operation of transmitting to the line via the unit 12 (processing 107) is continued until the voice input from the microphone 14 is completed (No in the judgment 108).
Loop).

When the voice input is completed (Ye in decision 108)
s) Next, it is determined whether or not the transmission original is set on the scanner 5 (determination 111). If the transmission original is not set (No in determination 111), the transmission process is terminated. Is set (judgment 11
1), a facsimile transmission process corresponding to phase F9 to phase F18 is performed (process 111).

As described above, when there is a method common to the voice coding method corresponding to the own apparatus and the sound coding method corresponding to the receiving side, the transmitting side determines that the transmitting side transmits the voice data in that method. After confirming and setting in advance, audio data can be transmitted in the set encoding method. Also, if there is no common audio coding method between the transmitting side and the receiving side, the input audio signal is sent to the receiving side as it is, so even if there is no common audio coding method between the transmitting side and the receiving side, Voice communication can be performed in a similar procedure.

Next, the receiving procedure in the facsimile machine 1 as the receiving side in the communication sequence of FIG. 2 will be described with reference to FIG.

In the figure, the facsimile apparatus 1 monitors an incoming call (No loop of the judgment 201), and
If the judgment 201 becomes Yes in response to
(Step 202).

The NSS set by the transmitting side within the range of the common capabilities of the receiving side and the transmitting side, including those for the voice coding / decoding scheme, notified by the NSF in the process 202. Is received corresponding to the phase F4 (process 203).

When the speech encoding / decoding method in the speech communication to be performed is determined in this way,
ADPCM-16 kbps, ADPCM-
32 kbps or LD-CELP-16 kbps
It is determined whether any of the above-mentioned voice encoding / decoding methods has been set (decision 204).

In the decision 204, no speech encoding / decoding method is set, and the "raw speech" without encoding is set.
Is set (No in decision 204), the audio encoding / decoding unit 8 converts the raw audio signal received via the line into the ADPCM-16 kbp
s, ADPCM-32 kbps or LD-CEL
Encoding is performed using any one of the P-16 kbps codes, and the encoded audio data is stored in the storage memory 7 (process 206).

In decision 204, the ADPCM-16k
bps, ADPCM-32 kbps, or LD-C
Any one of ELP-16 kbps audio coding
If the decryption method is set (Ye of decision 204)
s) The coded voice data received by the modem 11 via the line is stored in the storage memory 7 (process 205).

When the audio data reception / storage processing of the processing 205 or 206 is completed, it is next determined whether there is a received original, that is, whether the phase F8 is not the procedure end signal EOP but the message end signal EOM ( If there is no received document (decision 207) (N of decision 207)
o) The receiving process is terminated, but if there is a received document (Yes in decision 207), facsimile receiving / accumulating processes corresponding to phases F9 to F18 are performed (process 208).

As described above, when there is a common scheme between the speech coding system corresponding to the own device and the speech coding system corresponding to the receiving device, the receiving side determines that the speech data is to be received in that format. After confirming and setting in advance, audio data can be received in the set encoding method. Also, if there is no common voice coding method between the transmitting side and the receiving side, the transmitted raw voice signal is coded and stored, so that the voice code common to the transmitting side and the receiving side is used. Voice communication can be performed in the same procedure even when there is no conversion scheme. If there is no common audio coding method between the transmitting side and the receiving side, the transmitted raw input audio signal may be output from the speaker 13 in real time. It is desirable that the data be encoded and stored in the storage memory 7, as in the present embodiment, since the user is not always present on the side of.

The coded audio data and the coded image data stored in the storage memory 7 on the receiving side are presented to the user by the reception information output processing shown in FIG.

That is, output target reception information search / selection processing corresponding to an operation input via the operation display unit 10 is performed to select coded audio data or / and coded image data to be output (step 301). The selection of the output target is performed by, for example, issuing a file number for each reception operation and storing it in association with the encoded audio data or / and encoded image data stored in the storage memory 7. When specified, the corresponding data can be selected as an output target.

Then, while the selected coded voice data is read out from the storage memory 7 and decoded by the voice coder / decoder 8 (process 302), the decoded raw voice signal is transmitted to the network controller 12 by the network controller 12. The process of outputting from the speaker 13 via the speaker 13 (process 303) is performed until the decoding is completed (the loop of No in decision 304). When the decoding is completed (Yes in decision 304), the selected received image The original image data obtained by reading the data from the storage memory 7 and decoding by the encoding / decoding unit 9 is recorded by the plotter 6 and recorded and output (process 305).

In the embodiment described above,
Although the present invention has been applied to the G3 facsimile, it goes without saying that the present invention is not limited by the facsimile communication protocol.

[0048]

According to the first aspect of the present invention, of the respective types of voice coding systems provided in the transmitting side device and the receiving side device, the voice coding system in which both correspond in common is used. Since voice communication can be performed, the degree of freedom is increased for the voice communication partner, and the effect that it is possible to avoid a problem in which the transmitting side sends voice data that cannot be decoded by the receiving side by mistake is obtained. Can be

According to the second aspect of the present invention, even when there is no common speech coding system corresponding to both the transmitting device and the receiving device, the same procedure is performed between the transmitting device and the receiving device. The effect of enabling voice communication can be obtained.

According to the third aspect of the present invention, even when there is no common speech coding system corresponding to both the transmitting device and the receiving device, the same procedure is performed between the transmitting device and the receiving device. Voice communication can be performed, and the effect that the voice after reception can be handled in the same manner as when it is received as encoded voice data is obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a block configuration of a facsimile apparatus as a communication terminal apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a facsimile communication sequence.

FIG. 3 is a diagram illustrating an example of bit definitions related to voice reception of a non-standard function identification signal NSF / non-standard function setting signal NSS.

FIG. 4 is a flowchart illustrating a transmission processing procedure when the facsimile apparatus according to the embodiment of the present invention is on the transmission side.

FIG. 5 is a flowchart showing a reception processing procedure when the facsimile apparatus according to the embodiment of the present invention is on the reception side.

FIG. 6 is a flowchart illustrating a reception information output processing procedure in the facsimile apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Facsimile apparatus 2 System control part 3 ROM4 RAM 5 Scanner 6 Plotter 7 Storage memory 8 Voice encoding / decoding part 9 Encoding / decoding part 10 Operation display part 11 Modem 12 Network control part 13 Speaker 14 Microphone 15 System bus

Claims (3)

[Claims] 1. A transmitting device transmits voice data obtained by encoding a voice according to a predetermined communication voice coding method to a receiving device, and the receiving device transmits the voice data during the predetermined communication voice coding. In a communication terminal device receiving audio data from the transmitting device encoded in a system, the receiving device is compatible with its own device prior to starting reception of audio data from the transmitting device. One or more types of audio coding schemes are provided with a receivable audio coding scheme notifying unit for notifying the transmitting apparatus by a predetermined notification procedure, while the transmitting apparatus is configured to transmit audio data to the receiving apparatus. Prior to the start of transmission, the type of the voice encoding method supported by the receiving device notified by the predetermined notification procedure from the receiving device and one or more voices supported by the own device. Voice coding scheme setting means for setting a voice coding scheme of a type common to the type of coding scheme as the communication voice coding scheme, and the communication voice coding scheme by the voice coding scheme setting means. Setting means for notifying the receiving side apparatus of the type of the set voice coding scheme, and voice communication in a voice coding scheme which both the transmitting side apparatus and the receiving side apparatus support. A communication terminal device characterized in that: 2. The transmission-side device, which is associated with the type of speech coding scheme supported by the reception-side device notified by the reception-side device according to the predetermined notification procedure, If there is no audio coding method of the type common to one or more types of audio coding methods and the audio coding method setting means cannot set the communication coding method, the raw audio signal is left as it is. 2. The communication terminal device according to claim 1, further comprising an audio signal transmitting unit that transmits the audio signal to the receiving side device. 3. The receiving voice encoding and storing method, wherein the receiving side device encodes a raw voice signal transmitted from the transmitting side device in a voice coding system supported by the own device and stores the coded raw voice signal in a memory. 3. The apparatus according to claim 2, further comprising means.
A communication terminal device according to claim 1.