JPH05347664A - Voice dial recognition method - Google Patents

Abstract

PURPOSE:To obtain a voice dial recognition method in which a communication a opposite terminal equipment is designated with high accuracy with simple configuration based on voice information of a language used usually. CONSTITUTION:For example, voice information for identifying a communication opposite terminal equipment and a terminal equipment number corresponding one by one to the voice information are stored respectively in a voice information registration memory 5 and a terminal number registration memory 7 respectively in advance in a voice terminal equipment accommodated into an exchange network. Then the voice information entered from a voice input section 1 and the voice information stored in advance are compared and discriminated by a voice information discrimination circuit 10 at dialing and a terminal equipment number corresponding to the registered voice information best coincident is sent to an exchange.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice for inputting a dial for designating a called party, which is used in a switching network accommodating a voice terminal such as a telephone, by voice information, and for discriminating a communication partner based on the dialed information. The present invention relates to a dial recognition method, and more particularly, to a voice dial recognition method with a simple structure that is less likely to cause erroneous dialing.

[0002]

2. Description of the Related Art In the conventional voice dial system, an operator inputs a communication partner terminal number as numeric voice information, which is recognized by a voice terminal or an exchange and converted into a number. It is necessary to recognize which number each of a series of extremely short pronunciations, such as "d", requires advanced voice recognition technology, has the drawback of being expensive, and is prone to recognition error. Also, even with voice, it is necessary to enter the number of the mechanical partner terminal,
There were differences from the words used in everyday life. For example,
When calling "Manager Yamada", "I have Yamada's number is 1234." In mind or while looking at the memo, convert it to a number and then "Ichi, Ni, San, Yong" I had to pronounce it. FIG. 2 is a diagram showing a configuration of a word voice recognition unit used in a conventional voice dialing method. In FIG. 2, 21 is a spectrum analysis unit of the input voice, 22 is a phoneme standard pattern unit, 23 is a phoneme similarity calculation unit that calculates the similarity between the input voice and the phoneme standard pattern,
Reference numeral 24 is a similarity matrix section that accumulates the calculation results in time series for each phoneme, 25 is a word dictionary section that is accumulated as a phoneme sequence, and 2
Reference numeral 6 is a word matching unit that calculates the degree of coincidence between the similarity matrix and the word dictionary, and 27 is a word determination unit that determines which word the input voice is finally in. First, the input voice is analyzed by the spectrum analysis unit 21 for a certain short time period (15 m).
Every second), the spectrum is analyzed, and the similarity with each of the standard spectrum groups (about 40 kinds) accumulated for each phoneme such as vowels and consonants is calculated, and the result is sequentially calculated for each time interval in the similarity matrix section. Stored in 24. Then, when the word break is determined by the pause of the input voice or the like, next, the degree of coincidence between the word group formed by arranging the phoneme groups in time series and the similarity matrix is calculated. At this time, the difference in word pronunciation time length for each speaker is calculated according to the length of the word dictionary by the dynamic programming (DP) matching method. further,
The word matching unit 26 calculates the degree of matching with each word in the word dictionary, and the word determining unit 27 determines that the word whose output shows the best matching degree is the input word. That is, according to the conventional method, since the input voice word is compared with the phoneme group of the standard pattern for determination, it is difficult to absorb the individual difference in pronunciation by the speaker, and it is easy to make an erroneous determination. Only the words in the specified range can be used. Further, if the number of words is increased, the calculation of matching between the input voice and all the words in the dictionary requires a huge amount of hardware, or the calculation time becomes huge. Further, the more rigorously the phoneme similarity calculation and the word coincidence calculation are, the higher the recognition rate is. Therefore, in order to bring the recognition rate close to 100%, an advanced calculation circuit is required and a huge amount of hardware is required. Note that this type of method is described in, for example, "Digital Speech Processing, Sadahiro Furui, Tokai University Press (1985).
Year)) ”.

[0003]

In the above prior art,
(1) It is necessary to recognize which number is in each sequence of extremely short pronunciations, which makes the recognition device expensive (2)
Even with voice, there is a problem that it is necessary to input a mechanical partner terminal number, which is different from the words used in daily life. An object of the present invention is to improve such problems and provide a voice dial recognition method with a simple configuration, which can accurately specify a communication partner terminal based on voice information of words used in daily life.

[0004]

In order to achieve the above object, the voice dial recognition method of the present invention is such that voice information is registered and stored in advance in a voice terminal or an exchange together with a terminal number of a party with whom communication is normally performed. Every other time, as compared with the input voice information at the time of making a call, the terminal number corresponding to the registered voice information that best matches is used as the terminal number of the communication partner.

[0005]

In the present invention, it is not necessary to recognize the meaning itself of the voice information, and the voice information at the time of registration and the voice information at the time of making a call using the same voice input unit are respectively collected as a whole voice information. Therefore, it is only necessary to check the degree of agreement, and the number of people with whom communication is normally good is at most several dozens.
Erroneous dialing can be extremely reduced, and the means for detecting a match with the input voice information from the registered voice information group can be easily realized by a simple and inexpensive circuit. Therefore, it is possible to provide a voice dial recognition method that does not require a voice recognition device having a complicated configuration, uses a variety of words that are used everyday, and has a simple and inexpensive configuration with less erroneous dialing.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. <First Embodiment> FIG. 1 is a block diagram showing the outline of a voice terminal according to a first embodiment of the present invention. In FIG.
Reference numeral 1 is a voice input unit such as a microphone, 2 is a dial button used in an ordinary telephone or the like, 3 is a coder for extracting the characteristics of analog voice information and digitizing it, 4
-1 to 4-5 are function switches used for registration, confirmation and change of information, 5 is a voice information registration memory for registering and accumulating voice information groups, and 6 is a field in the voice information registration memory. A management memory for managing whether or not voice information is registered, 7 is a terminal number registration memory for registering and storing registered voice information and a terminal number corresponding to one to one, and 8 is registration of voice information and voice information. An address counter used for calling the call, 9 is a temporary buffer of the input voice at the time of calling, 10 is a voice information determination circuit for determining whether the input voice information at the time of calling matches the registered voice information, and 11 is An address control circuit for controlling the address counter 8 based on the coincidence / non-coincidence output of the voice information judging circuit 10 and the read output of the management memory 6, and 12 is an address counter under the control of the address control circuit 11. Gate circuit for inputting the output of 8 as the address of the terminal number registration memory 7, 13 write data buffer to the audio information registration memory 6, 14 read data buffer from the speech information registration memory 6, 15
Is a buffer for writing data to the terminal number registration memory 7, 16 is a buffer for reading data from the terminal number registration memory 7, 17 is a display circuit for displaying the read output of the terminal number registration memory 7, and 31 to 35 are audio information lines. , 36
Is a registered voice information line called from the voice information registration memory 6, 41 to 43 are dial information lines of the dial buttons 2,
44 is a terminal number information line called from the terminal number registration memory 7, 45 is a partner terminal number information line for transmitting the communication partner terminal number, 51 is an address line output from the address counter 8, 52 is an address counter 8 Is output, the address line 53 of the management memory 6, 53 is the address line of the terminal number registration memory 7 for calling the terminal number when the contents of the input voice information line 35 and the registered voice information line 36 match, and 61 is the voice information determination circuit. A signal line output when a match is detected by the output of 10, and 62 is an output of the address control circuit 11,
Reference numeral 63 is a signal line output when the voice information judging circuit 10 detects a match, and 63 is a signal line for controlling the address counter 8 by the output of the address control circuit 12.

Next, the operation of this embodiment will be described. First, at the time of registration, the operator first sets the function switch 4
-1 is operated to switch the output line 31 of the voice input unit 1 to the write line 33 side of the voice information registration memory 6. next,
The operator uses the voice input unit 1 to input voice information to be registered. At this time, it is conceivable to divide the voice information into a certain time after the initial volume reaches a certain level. It is also possible to carry out the registration operation more reliably by the guidance instruction from the voice terminal. The format of the accumulated data of the voice information thus input is determined by the coder 3, but any format can be used as long as the features of the voice information can be distinguished. For example, the spectrum analysis as shown in the example of the prior art may be performed and the result may be directly stored as digital data.
It may be digitized by a CM coder or the like and stored as it is. In the voice terminal of the present embodiment, when the function switch 4-1 operates, the address counter 8 is operated, the management memory 6 is searched, and the address whose content is “0” is searched in advance, and the input voice is input. The information is written in the address of the voice information memory 5. Next, the function switch 4-2 is operated to switch the output line 41 of the dial button 2 to the writing line 43 side of the terminal number registration memory 7, and the terminal number to be registered is input using the dial button 2 to enter the address. Write to the address of the terminal number registration memory 7 indicated by the output of the counter 8. Next, the function switch 4-5 is operated to the "1" side, and "1" is written in the address of the management memory 6 indicated by the output of the address counter 8. When making a call, the function switches 4-3 and 4-4 are operated,
Switch to the voice dial side. As a result, the voice uttered by the operator passes through the voice input unit 1 and the voice information line 31,
It is input to the voice information buffer 9 through 32 and 34. On the other hand, the registered voice information is called from the memory 5, is input to the voice information determination circuit 10 via the buffer 4, and it is determined whether or not it matches the output of the voice information buffer 9. In this determination method, the DP matching method is used to match the lengths of time of both parties, and the degree of matching between the two is calculated.
If the result of determination is that they do not match, the address counter 8 is updated under the control of the address control circuit 11, and the next accumulated voice information is called and input to the voice information determination circuit 10. Since the operator has already uttered the complete voice information as a voice dial, there is no condition such as ending the calculation until the next utterance, and there is no problem even if it takes some time for sequential search and calculation. , The number of calculation circuits is small. If they match, the address control circuit 1
The gate 12 is opened by the control from 1, the output of the address counter 8 is input as the address of the terminal number registration memory 7, the terminal number corresponding to the matched voice information is called, and is sent to the exchange through the partner terminal number information line 45. Sent out. At this time, the partner terminal number is displayed on the display circuit 17.

In addition, in the present embodiment, the following operation is possible in addition to the above functions. To confirm the registered contents of the voice information group registration memory 5, the function switch 4-3 is operated and the voice similar to the registered voice information is input from the voice input circuit 1. As a result, the voice information registration memory 5 is searched, and the terminal number corresponding to the matched voice information is displayed on the display circuit 1.
It is displayed on 7. Further, in order to change the registered contents, similarly, the function switch 4-3 is operated, and a voice similar to the registered voice information is input from the voice input circuit 1 to search the voice information registration memory 5 to find a match. The terminal number corresponding to the voice information is displayed on the display circuit 17, and the function switch 4-2 is operated to input a new terminal number from the dial button 3. Further, in order to delete the registration, the function switch 4-3 is operated, and when the same voice as the registered voice information is input from the voice input circuit 1, the voice information registration memory 5 is searched, and the voice information registration in which a match is detected is registered. The contents of the management memory 6 corresponding to the memory address are stored in the function switch 4
-5 is moved to the "0" side and rewritten to "0". Even if all the voice information registration memory areas are searched, if the input voice information does not match any of the registered voice information, it can be determined that the terminal number is not displayed on the display circuit 17, but an announcement etc. May be output. Also,
The function switches 4-1 to 4-5 may be shared with the dial button 2 attached to the voice terminal or other function switches as long as they satisfy the function.
Not only the switching operation of the switch by the pressing of the operator, but also the switching by the control from some control circuit provided in the voice terminal may be performed. Further, in this embodiment, the registered voice information memory 5, the management memory 6, and the registered terminal number memory 7 are separate memories, but the fields may be divided and held in the same memory. It is also possible to obtain the same effect as this embodiment by inserting these memory parts into an IC memory card and inserting them into an IC card voice terminal incorporating the function switch and peripheral circuit part of this embodiment.

<Second Embodiment> FIG. 3 is a block diagram showing the outline of an exchange according to a second embodiment of the present invention. In this embodiment, a voice dial receiving trunk is provided as a kind of dial receiving trunk of the exchange. In FIG. 3, 1 is a voice input circuit in a voice terminal, 2 is a dial button, 105 is a voice information registration memory, 106 is a management memory, 107 is a terminal number registration memory, 120 is a communication path section of an exchange, 121 is control of the exchange. A device, 122 is a voice dial receiving trunk, 123 is an internal control circuit of the voice dial receiving trunk 122, 124 is a switch for switching the flow of voice information and dial information, and 125 is a flow of voice information and dial information in the voice terminal. It is a switch for switching. The internal configuration of the voice dial receiving trunk of this embodiment is basically the same as the circuit in the voice terminal shown in FIG. 1, but in particular, the internal control circuit 123 for switching and controlling the function switches, voice information and dialing. A switch 124 for switching the flow of information is added, and the switch operation is enabled by the control of the exchange.
It differs from the first embodiment in that a memory is added for a plurality of users and the value of the address counter 108 can be set from the control device 121 so that a memory field for each user can be designated. With such a configuration, when the operator of the voice terminal informs the exchange of a request by off-hook or the like, the exchange returns a dial tone and prompts for dial input. Here, in order to inform that the voice dialing is a call, registration, change, deletion, etc., a predetermined specific number is input from the dial button 2. In the exchange, when the dial is received by the normal dial receiving trunk and reported to the control device 121, the control device 121 switches the call path switch of the call path unit 120 to the voice dial receiving trunk 122. After that, similarly to the first embodiment, the voice information and the terminal number are registered and the call is made by the voice information. In the above embodiment,
Although the application to the voice dial has been described, a similar voice information recognition method can be applied to a voice command to be operated by issuing an instruction to various devices from voice.

[0010]

According to the present invention, since the voice information registered in advance and the voice information at the time of making a call are compared and judged, any voice information may be used, and arbitrary words can be used. Since it is not necessary to recognize the meaning of the volume itself, an expensive voice recognition device is unnecessary, and voice dialing can be realized economically. Furthermore, since the voice information input from the same voice terminal is compared as a group, it is easy to make a match and it is difficult to make an erroneous dial. Further, even when the present invention is carried out by the exchange, there are many advantages such that even if a user of another voice terminal registers and uses voice information of the same word, if it is discriminated by the calling terminal number, it will not be confused at all.

[0011]

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an outline of a voice terminal in a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a word voice recognition unit used in a conventional voice dial system.

FIG. 3 is a configuration diagram showing an outline of an exchange in a second embodiment of the present invention.

[Explanation of symbols]

 1 Voice Input Section 2 Dial Button 3 Coder 4-1 Function Switch 4-2 Function Switch 4-3 Function Switch 4-4 Function Switch 4-5 Function Switch 5 Voice Information Registration Memory 6 Management Memory 7 Terminal Number Registration Memory 8 Address Counter 9 buffer 10 voice information determination circuit 11 address control circuit 12 gate circuit 13 write data buffer 14 read data buffer 15 buffer 16 buffer 17 display circuit 21 spectrum analysis section 22 phoneme standard pattern section 23 phoneme similarity calculation section 24 similarity matrix section 25 Word dictionary unit 26 Word matching unit 27 Word determination unit 31 Voice information line 32 Voice information line 33 Voice information line 34 Voice information line 35 Voice information line 36 Registered voice information line 41 Dial information line 42 Dial information line 43 Dial information line 4 terminal number information line 45 partner terminal number information line 51 address line 52 address line 53 address line 61 signal line 62 signal line 63 signal line 103 coder 104-1 function switch 104-2 function switch 104-3 function switch 104-4 function Switch 104-5 Function switch 105 Voice information registration memory 106 Management memory 107 Terminal number registration memory 108 Address counter 109 Buffer 110 Voice information determination circuit 111 Address control circuit 112 Gate circuit 113 Write data buffer 114 Read data buffer 115 Buffer 116 Buffer 120 Call Road part 121 Control device 122 Voice dial receiving trunk 123 Internal control device 124 Switch 125 Switch 131 Voice information line 132 Voice information line 133 Sound Voice information line 134 Voice information line 135 Voice information line 136 Registered voice information line 141 Dial information line 142 Dial information line 143 Dial information line 144 Terminal number information line 145 Partner terminal number information line 151 Address line 152 Address line 153 Address line 161 Signal Line 162 Signal line 163 Signal line

Claims (2)

[Claims] 1. A method of designating a receiving terminal of a switching network accommodating a voice terminal, wherein voice information for identifying a communication partner terminal and a terminal number corresponding to the voice information are registered in advance in the voice terminal. At the time of making a call, the voice terminal compares the input voice information with the voice information registered in advance, determines the terminal number corresponding to the registered voice information that best matches the communication partner terminal number, A voice dial recognition method characterized by transmitting a terminal number to an exchange. 2. A method of designating a called terminal of a switching network accommodating a voice terminal, wherein voice information for identifying a communication partner terminal, which is input from the voice terminal in advance, and a terminal number corresponding to the voice information are registered in the exchange. Incidentally, at the time of making a call from the voice terminal, the exchange selects the registered voice information registered in advance from the call terminal based on the number for identifying the call terminal, and inputs it from the call terminal. The voice dial recognition method is characterized in that the terminal number corresponding to the registered voice information that most closely matches is determined as the communication partner terminal number and the connection operation is performed.