JP2003209600A - Calling system, calling terminal, method, program, and computer-readable storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To clearly inform meaning of conversation (the intention of a calling party) and to allow easy use even for a bearing impaired person. <P>SOLUTION: A calling system allows bi-directional simultaneous communications of a voice and a picture between at least two calling terminals 201, 202. The calling system comprises: a voice recognition means for voice- recognizing voice information transmitted from the calling terminal of the calling party; a determination means for determining the success or failure in the voice recognition; a conversion means for converting the voice-recognized voice information into character information when the possible voice recognition is determined; a display means for superimposing the converted character information on the picture information transmitted from the calling terminal of the calling party for display on a monitor TV; and a processing means for performing a process intending to enhance hearing recognition against the voice information (for example, the process for increasing sound pressure) when unavailable voice recognition is determined. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call system capable of two-way simultaneous communication of voice and image, a call terminal used in the call system, a method, a program, and a computer-readable storage medium.

[0002]

2. Description of the Related Art Today, a call system capable of bidirectional simultaneous voice and image communication has been realized. In such a call system, a call terminal having a camera with a built-in microphone and a monitor TV with a speaker is provided at each of the remote locations, and the call is made while watching the image of the other party.

[0003]

SUMMARY OF THE INVENTION As described above, in a call system capable of bidirectional simultaneous voice and image communication,
Although there is an advantage that the understanding of the conversation is promoted by adding the image to the voice, the meaning of the conversation (the intention of the other party) is nevertheless used when the conversation is difficult to hear due to the ambient noise and the unclear pronunciation of the speaker. Was not transmitted.

Also, like a voice-only call system,
There is a problem that it is still difficult for hearing-impaired people to use.

The present invention has been made in view of the above points, and makes it possible to clearly convey the meaning of a conversation (the intention of the other party) in a communication system capable of two-way simultaneous communication of voice and image, Furthermore, it is intended to make it easy for people with hearing impairments to use.

[0006]

The call system of the present invention is a call system that enables two-way simultaneous communication of voice and image between at least two call terminals, and is transmitted from the call terminal of the other party. A voice recognition unit for recognizing voice information, a conversion unit for converting the voice-recognized voice information into character information, and a display device by superimposing the character information on image information transmitted from the call terminal of the other party. It is characterized in that a display means for displaying is provided.

Another feature of the call system according to the present invention is that the determining means determines whether or not the voice recognition is successful, and if the voice recognition is determined to be impossible,
The present invention is provided with a processing unit that performs one or a plurality of processes intended to improve the auditory recognition of the voice information.
Furthermore, it is possible to set a desired process as a process intended to improve the auditory recognition level. As processing intended to improve the auditory recognition, sound pressure increasing processing,
Frequency characteristic adjustment processing, noise removal processing, etc. can be applied.

Another feature of the call system of the present invention is that it is provided with a memory means for storing image information transmitted from the call terminal of the other party. In addition, other features of the call system of the present invention are:
The point is that a memory means for storing voice information transmitted from the call terminal of the other party is provided.

Another feature of the communication system of the present invention is that it is provided with a synchronization control means for controlling the synchronization of the voice information and the image information.

Another feature of the call system of the present invention is that at least one of the call devices is provided with a character input terminal, and the character information input via the character input terminal is used to call the other party. It is possible to send to the device. Another feature of the call system of the present invention is that at least one call device displays the character information transmitted from the call terminal of the other party on the display device by superimposing it on the image information transmitted at the same time. It has a display means.

The call terminal of the present invention is a call terminal used in a call system capable of two-way simultaneous communication of voice and image between at least two call terminals, and the voice transmitted from the call terminal of the other party. A voice recognizing means for recognizing information by voice, a converting means for converting the voice recognized voice information into character information, and displaying the character information on the display device by superimposing the character information on the image information transmitted from the call terminal of the other party. It has a feature in that it is provided with a display means.

The call method of the present invention is a call method using a call system capable of two-way simultaneous communication of voice and image between at least two call terminals, and the voice transmitted from the call terminal of the other party. A procedure of recognizing information by voice, a procedure of converting the voice information recognized by voice into character information, and a step of superimposing the character information on image information transmitted from the call terminal of the other party and displaying it on a display device. It is characterized by having.

The program of the present invention is a program for controlling a call terminal used in a call system capable of two-way simultaneous communication of voice and image between at least two or more call terminals. A process of recognizing voice information transmitted from the voice recognition device, a process of converting the voice recognition voice information to character information, and a display device by superimposing the character information on image information transmitted from the call terminal of the other party. It is characterized in that it executes the process displayed in.

The computer program of the present invention is characterized in that the above program is stored.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a call system, a call terminal, a method, a program, and a computer-readable storage medium according to the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 shows the configuration of a communication system according to the present embodiment. Call terminals 201 and 202 capable of simultaneous transmission / reception and simultaneous image transmission / reception are connected via a transmission path. Each of the terminals 201 and 202 includes a monitor TV 204 equipped with a built-in microphone camera 203, 207 and speakers 205, 209. It consists of 208.

In the figure, reference numerals 212 and 214 denote monitors T.
Images of mutual communication partners displayed on V204 and V208 are shown, and 211 and 213 show captions as a result of voice recognition of voice signals (voice information) transmitted from the mutual communication partners as described later.

Reference numerals 215 and 216 denote voice signal outputs (sound waves) transmitted from the other communication partners, and 218 and 219 are voice signals (215 and 21) transmitted from the other communication partners.
As a result of voice recognition of 6), an example of caption when there is a part where voice recognition is not possible is shown.

FIG. 2 is a block diagram showing the configuration of the call terminals 201 and 202. FIG. 10A shows a configuration for transmitting voice and images. 101 is a video camera, 1
Reference numeral 04 denotes a microphone, which corresponds to the microphone built-in cameras 203 and 207 in FIG. Reference numeral 102 is an image encoder. 103 is a multiplexer. Reference numeral 105 is a microphone amplifier. Reference numeral 106 is a speech encoder.
107 is a buffer memory.

FIG. 1B shows a structure for receiving voice and images. Reference numeral 108 is a buffer memory. 109 is a demultiplexer. Reference numeral 110 is an image decoder. 111 is a frame memory. 112 is a monitor T
V, which corresponds to the monitor TVs 204 and 208 in FIG. Reference numeral 113 is a voice decoder. 114 is a buffer memory. Reference numeral 115 is an amplifier. Reference numeral 116 denotes a speaker, which is the speaker 205, 206, 20 shown in FIG.
This corresponds to 9, 210. 117 is a gain control unit. 1
Reference numeral 18 is a voice recognition unit. An image control unit 119 is provided.
Reference numeral 120 is a synchronization control unit.

Next, the processing operation in the call system of this embodiment will be described. In the call system as shown in FIG. 1, although not specifically shown, for example, dials or the like are operated on the graphical user interfaces displayed on the monitor TVs 204 and 208,
After that, the user talks in front of the monitor TVs 204 and 208 while watching the image of the communication partner.

The flowchart of FIG. 3 shows the processing operations performed when transmitting voice and images. The moving image signal captured by the video camera 101 is the image encoder 1
After being subjected to AD conversion and predetermined encoding (compression) processing in 02, it is input to the multiplexer 103 (step S3).
01).

At the same time, the voice signal taken in by the microphone 104 is amplified to a predetermined level by the microphone amplifier 105 and then AD-converted and given a predetermined code by the voice encoder 106 in the same manner as the moving image signal. After being converted (compressed), it is input to the multiplexer 103 (step S301).

The coded moving image signal and the coded audio signal input to the multiplexer 103 are subjected to a multiplexing process and various header information in order to form a bit stream of a format suitable for a transmission path or a storage medium as an output destination. Addition processing is performed and the data is temporarily stored in the buffer memory 107 (step S302).

The bit stream accumulated in the buffer memory 107 is read at a predetermined bit rate by an external or internal rate control unit (step S30).
3).

The flowchart of FIG. 4 shows the processing operations performed when receiving voice and images. The bit stream transmitted from the call terminal of the other party is temporarily stored in the buffer memory 108 and then read at a bit rate suitable for the processing capability of the subsequent processing, and the demultiplexer 1
09 is input (step S401).

The bit stream input to the demultiplexer 109 is separated into an encoded moving image signal and an encoded audio signal, and the encoded moving image signal is the image decoder 110.
To the audio decoder 113, and both are decoded into a digital moving image signal and a digital audio signal or an analog moving image signal and an analog audio signal by a predetermined decoding process. (Step S402).

The above-mentioned decoded moving image signal is stored in the frame memory 111, and under the control of the synchronization control unit 120, it is appropriately read out in synchronization with the audio signal and displayed on the monitor TV 112. Note that this processing is omitted in the flowchart of FIG.

The decoded voice signal is stored in the buffer memory 114, and at the same time, the voice recognition unit 11
The speech recognition processing is performed on the decoded speech signal that is input to S8 (step S403).

If the voice can be recognized, the recognized voice information is converted into character information (text information) (step S404), and the text information and timing information (synchronization information with the moving image) are image-controlled. It is sent to the section 119.

The image control section 119 includes a voice recognition section 118.
In accordance with the timing information transmitted from the frame memory 111, 211 of FIG. 2, at an arbitrary position in the corresponding frame of the decoded moving image signal,
As indicated by 213, the text information corresponding to the recognized voice is superimposed and displayed as a caption (step S405).

The delay corresponding to the time required for the voice recognition processing in the voice recognition unit 118 is absorbed by the frame memory 111 for images and the buffer memory 114 for voice, and stored in the frame memory 111. The synchronization between the moving image and the voice stored in the buffer memory 114 is managed by the synchronization control unit 120.

On the other hand, when the voice signal cannot be recognized, the gain control signal is sent to the gain control section 117.
The gain control unit 117 that has received the gain control signal causes the amplifier 11
Speaker 1 in the unrecognizable part by increasing the gain of 5
The audio output adjustment for increasing the sound pressure from 16 is performed (step S406).

In the case where voice recognition is impossible, depending on the capacity of the frame memory 111 and the capacity of the buffer memory 114, the gain controller 117 and the synchronization control unit increase the voice output from the point before the time when voice recognition becomes impossible. It is also possible to program the control unit 120.

As described above, by performing voice recognition and displaying characters, it is possible to reduce the frequency of misunderstandings and misunderstandings that are likely to occur in a voice call, and even a hearing impaired person can call. You can expect an effect.

If the voice cannot be recognized, a predetermined process intended to improve the auditory recognition of the voice signal, that is, in the present embodiment, the sound pressure is increased.
The effect of improving the recognition rate of conversation can be expected.

When the above-mentioned voice recognition is impossible, as shown in the flowchart of FIG. 5, a variation of processing intended to improve auditory recognition may be set.
That is, when the voice cannot be recognized, it is determined whether or not there is a request from the user for the selection of the processing method (step S501). If there is no request, only the default voice output adjustment (sound pressure increase process) is performed. Is performed (step S502).

On the other hand, if there is a request,
In response to the request, frequency characteristic adjustment (emphasis) for increasing clarity (step S503) or background noise removal (filtering) (step S50)
After performing the process such as 4), the audio output is adjusted (step S502).

The functions such as frequency characteristic adjustment (emphasis) and background noise removal that can be selected are performed by hardware such as a frequency characteristic adjuster and background noise removal filter.
This can be done by equipping the amplifier 115 and the like shown in FIG.

The processing method is selected by the call terminal 2
This is possible by programming the functions prepared in advance using the input functions 01 and 203 so that they can be selected from the menu on the screen.

(Second Embodiment) FIG. 6 shows the configuration of a call system according to the present embodiment. Call terminals 301, 302 capable of simultaneous transmission / reception and simultaneous transmission / reception of images are connected via a transmission path, and each of the terminals 301, 302 includes a monitor TV 304 including cameras 303, 307 with built-in microphones, speakers 305, 309, It consists of 308. A handwritten character input device 317 and a keyboard 318 are connected to the call terminal 301.

In the figure, 311 indicates a monitor display of characters input by the handwritten character input device 317 or keyboard 318, and 313 and 315 indicate a monitor TV 304,
An image of the other communication partner displayed on 308 is displayed.
Reference numeral 2 denotes a caption as a result of voice recognition of voice signals transmitted from each other's communication partners as described later.
Reference numeral 14 denotes a caption in which the text signal transmitted from the communication partner is displayed on the monitor as described later.
Indicates an audio signal output (sound wave) transmitted from the communication partner.

FIG. 7 is a block diagram showing the configuration of the call terminals 301 and 302. 801 is a video camera, 8
Reference numeral 04 denotes a microphone, which corresponds to the microphone built-in cameras 303 and 307 in FIG. Reference numeral 802 is an image encoder. 803 is a multiplexer. 805 is a microphone amplifier. Reference numeral 806 is a speech encoder.
Reference numerals 807 and 808 are buffer memories.

Reference numeral 809 is a demultiplexer. 810
Is an image decoder. Reference numeral 811 is a frame memory. Reference numeral 812 denotes a monitor TV, which is the monitor TV shown in FIG.
It corresponds to 304 and 308.

Reference numeral 813 is a voice decoder. Reference numeral 814 is a buffer memory. Reference numeral 815 is an amplifier. 816
Is a speaker, and the speakers 305 and 30 in FIG.
6, 309 and 310.

Reference numeral 817 denotes a character input terminal, which corresponds to the handwritten character input device 317 and keyboard 318 shown in FIG. Reference numeral 818 is a text encoder. Reference numeral 823 is a text decoder.

Reference numeral 819 is a gain controller. Reference numeral 820 is a voice recognition unit. An image control unit 821 is provided. Reference numeral 822 is a synchronization control unit.

Next, the processing operation in the call system of this embodiment will be described. In the call system as shown in FIG. 6, although not specifically shown, for example, a dial or the like is operated in a graphical user interface displayed on the monitor TVs 304 and 308,
After that, the user talks in front of the monitor TVs 304 and 308 while watching the image of the communication partner.

The flowchart of FIG. 8 shows the processing operations performed when transmitting voice and images. The moving image signal captured by the video camera 801 is the image encoder 8
After being AD-converted and subjected to predetermined encoding (compression) processing in 02, they are input to the multiplexer 803.

When a character is input from the character input terminal 817 (handwritten character input device 317 or keyboard 318) in parallel with the image signal taken from the video camera 801, the input character signal (text signal) is , Frame memory 811, and text encoder 818
Is input to the multiplexer 803 via. As shown in FIG. 6, the input character signal is displayed on the monitor of its own call terminal (see reference numeral 311) and transmitted to the call terminal of the other party as described later to be superimposed on the image and displayed on the monitor TV. It is displayed (see reference numeral 314).

When voice is input, the voice signal taken in by the microphone 804 is the microphone amplifier 8
After being amplified to a predetermined level in 05, the audio encoder 806 performs AD conversion and predetermined encoding (compression) processing in the same manner as the moving image signal, and then is input to the multiplexer 803 (step S801).

The coded moving image signal, coded audio signal, and coded text signal input to the multiplexer 803 are
The buffer memory 807 is subjected to multiplexing processing and various header information addition processing to form a bitstream in a format suitable for the transmission path or storage medium that is the output destination.
Is temporarily stored (step S802).

The bit stream accumulated in the buffer memory 807 is read out at a predetermined bit rate by an external or internal rate controller (step S80).
3).

The flowchart of FIG. 9 shows the processing operations performed when receiving voice and images. The bit stream (video, audio, text, etc.) transmitted from the call terminal of the other party is temporarily stored in the buffer memory 808, then read out at a bit rate suitable for the processing capability of the subsequent processing, and then to the demultiplexer 809. It is input (step S901).

The bit stream input to the demultiplexer 809 is separated into an encoded moving image signal, an encoded audio signal and an encoded text signal, and the encoded moving image signal is encoded by the image decoder 810. The voice signal is input to the voice decoder 813, and the encoded text signal is input to the text decoder 823. By a predetermined decoding process,
It is decoded into a digital moving image signal and a digital audio signal, or an analog moving image signal and an analog audio signal, and a text signal (step S902).

The decoded moving image signal and text signal are stored in the frame memory 811. Further, the text signal is stored (superposed) at an arbitrary position of the moving image signal (frame) to form one moving image signal. Then, the moving image on which the text is superimposed is synchronized with the synchronization control unit 822.
Under the control of (1), the data is appropriately read and displayed on the monitor TV 812 in synchronization with the audio signal. Note that this processing is omitted in the flowchart of FIG.

The decoded voice signal is stored in the buffer memory 814 and, at the same time, the voice recognition section 82.
0, and voice recognition processing is performed on the decoded voice signal (step S903).

If voice recognition is possible, the recognized voice information is converted into character information (text information) (step S904), and the text information and timing information (synchronization information with the moving image) are image-controlled. It is sent to the section 821.

In the image control unit 821, the voice recognition unit 820
In accordance with the timing information transmitted from the frame memory 811, the recognized voice is recorded at an arbitrary position in the corresponding frame of the decoded video signal stored in the frame memory 811, as shown at 312 in FIG. The text corresponding to is superimposed and displayed on the image as a caption (step S90).
5).

That is, as shown in FIG.
On the other hand, when communicating by inputting images and characters, in addition to the text resulting from voice recognition as described above (not shown in the call terminal 302 in FIG. 6), the text input from the character input terminal 817 of the terminal 301 Is also displayed as a caption on the image.

The handling when the voice signal cannot be recognized (step S906) is the same as that described in the first embodiment, and the description thereof is omitted here.

As described above, it is possible to input characters,
Since the characters are displayed on the communication terminal of the communication partner, it is expected that, for example, a disabled person or the like who has difficulty in conversation can make a call using the characters.

(Other Embodiments) In order to operate various devices so as to realize the functions of the above-described embodiments, a computer connected to the various devices or a computer in a system may be operated in the above-described embodiment. To supply the program code of software for realizing the functions of the
Those implemented by operating the above various devices according to the program stored in U) are also included in the scope of the present invention.

Further, in this case, the program code itself of the software realizes the function of the above-described embodiment, and the program code itself constitutes the present invention. As a transmission medium of the program code, a communication medium (a wired line such as an optical fiber or a wireless line) in a computer network (LAN, WAN such as the Internet, a wireless communication network, etc.) system for propagating and supplying the program information as a carrier wave. Etc.) can be used.

Further, means for supplying the program code to the computer, for example, a recording medium storing the program code constitutes the present invention. A flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a magnetic tape, a non-volatile memory card, a ROM, or the like can be used as a recording medium for storing the program code.

Moreover, not only the functions of the above-described embodiments are realized by executing the supplied program code by the computer, but also the OS (operating system) or the other in which the program code is operating in the computer. It goes without saying that the program code is also included in the embodiment of the present invention when the functions of the above-described embodiment are realized in cooperation with the application software of the above.

Further, after the supplied program code is stored in the memory provided in the function expansion board of the computer or the function expansion unit connected to the computer, the function expansion board or function expansion unit is instructed based on the instruction of the program code. It goes without saying that the present invention also includes a case where the CPU or the like included in the above-mentioned performs some or all of the actual processing and the functions of the above-described embodiments are realized by the processing.

It should be noted that the shapes and structures of the respective portions shown in the above-mentioned embodiments are merely examples of the embodiment in carrying out the present invention, and the technical scope of the present invention is thereby provided. It should not be construed as limiting. That is, the present invention can be implemented in various forms without departing from the spirit or the main features thereof.

[0069]

As described above, according to the present invention, it is possible to reduce the frequency of meaninglessness or misunderstanding that is likely to occur in a voice call by voice recognition of the voice information of the other party and character display. Further, it is expected that the hearing-impaired person will be able to talk.

If the voice cannot be recognized, a predetermined process intended to improve the auditory recognition of the voice signal, for example, the sound pressure is increased, so that the recognition rate of the conversation is improved. The effect of making it possible can be expected.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a configuration of a telephone call system according to a first embodiment.

FIG. 2 is a block diagram showing a configuration of a call terminal according to the first embodiment.

FIG. 3 is a flowchart showing a processing operation performed at the time of transmitting a voice and an image in the first embodiment.

FIG. 4 is a flowchart showing a processing operation performed at the time of receiving a sound and an image in the first embodiment.

FIG. 5 is a flowchart in the case of setting a variation of processing intended to improve auditory recognition.

FIG. 6 is a schematic diagram showing a configuration of a call system according to a second embodiment.

FIG. 7 is a block diagram showing a configuration of a call terminal according to a second embodiment.

FIG. 8 is a flowchart showing processing operations performed at the time of transmitting voice and images in the second embodiment.

FIG. 9 is a flowchart showing a processing operation performed at the time of receiving a voice and an image in the second embodiment.

[Explanation of symbols]

201, 202, 301, 302 Call terminal 203, 207, 303, 307 Built-in microphone type camera 205, 209, 305, 309 Speaker 204, 208, 304, 308 Monitor TV 317 Character input device 318 Keyboard 101, 801 Video camera 104, 804 Microphone 102, 802 Image encoder 103, 803 Multiplexer 105, 805 Microphone amplifier 106, 806 Audio encoder 107, 108, 807, 809 Buffer memory 109, 809 Demultiplexer 110, 810 Image decoder 111 , 811 Frame memories 112, 812 Monitor TVs 113, 813 Audio decoders 114, 814 Buffer memories 115, 815 Amplifiers 116, 816 Speakers 117, 819 Gain control units 118, 82 Voice recognition unit 119,821 image control unit 120,822 synchronization control unit 817 character input terminal 818 for text encoder 823 for text decoder

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Claims (15)

[Claims] 1. A call system capable of two-way simultaneous communication of voice and image between at least two call terminals, and voice recognition means for recognizing voice information transmitted from a call terminal of the other party. It is provided with a conversion means for converting the voice information obtained by the voice recognition into character information, and a display means for displaying the character information on a display device by superimposing the character information on the image information transmitted from the call terminal of the other party. And call system. 2. A judging means for judging the success or failure of the voice recognition, and one or a plurality of means intended to improve auditory recognition of the voice information when it is judged that the voice recognition cannot be performed. The call system according to claim 1, further comprising a processing unit that performs processing. 3. The call system according to claim 2, wherein a desired process can be set as a process intended to improve the auditory recognition level. 4. The call system according to claim 2, wherein the process intended to improve the auditory recognition is a sound pressure increasing process. 5. The call system according to claim 2, wherein the process intended to improve the auditory recognition is a frequency characteristic adjustment process. 6. The call system according to claim 2, wherein the process intended to improve the auditory recognition level is a noise removal process. 7. The call system according to claim 1, further comprising a memory unit for storing image information transmitted from the call terminal of the other party. 8. The call system according to claim 1, further comprising a memory unit for storing voice information transmitted from the call terminal of the other party. 9. The call system according to claim 1, further comprising a synchronization control unit that controls synchronization between the voice information and the image information. 10. The character input terminal is provided in at least one of the communication devices, and the character information input through the character input terminal can be transmitted to the communication device of the other party. 10. The call system according to any one of 9 to 10. 11. The at least one telephone device is provided with display means for superimposing character information transmitted from the telephone terminal of the other party on image information transmitted at the same time and displaying it on a display device. The call system according to any one of Items 1 to 10. 12. A call terminal used in a call system that enables two-way simultaneous communication of voice and image between at least two call terminals, and voice-recognizes voice information transmitted from the call terminal of the other party. A voice recognition means, a conversion means for converting the voice information recognized by the voice into character information, and a display means for displaying the character information on the display device by superimposing the character information on the image information transmitted from the call terminal of the other party. A call terminal characterized by being provided. 13. A call method using a call system that enables two-way simultaneous communication of voice and image between at least two call terminals, and voice-recognizes voice information transmitted from the call terminal of the other party. It has a procedure, a procedure of converting the voice information of the voice recognition into character information, and a procedure of superimposing the character information on image information transmitted from the call terminal of the other party and displaying it on a display device. How to call. 14. A program for controlling a call terminal used in a call system capable of two-way simultaneous communication of voice and image between at least two call terminals, the program being transmitted from a call terminal of the other party. A process of voice-recognizing voice information, a process of converting the voice-recognized voice information into character information, and a process of superimposing the character information on image information transmitted from the call terminal of the other party and displaying it on a display device. A program characterized by executing and. 15. A computer-readable storage medium having the program according to claim 14 stored therein.