CN107657955B - Voice interaction question-asking system and method based on VR virtual classroom - Google Patents
Voice interaction question-asking system and method based on VR virtual classroom Download PDFInfo
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- CN107657955B CN107657955B CN201711095348.3A CN201711095348A CN107657955B CN 107657955 B CN107657955 B CN 107657955B CN 201711095348 A CN201711095348 A CN 201711095348A CN 107657955 B CN107657955 B CN 107657955B
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/04—Electrically-operated educational appliances with audible presentation of the material to be studied
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/131—Protocols for games, networked simulations or virtual reality
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
- G10L2015/225—Feedback of the input speech
Abstract
The invention relates to a voice interaction questioning system and method based on a VR virtual classroom. Comprises a server, a voice recognition system, a helmet and a handle. Its characteristics of this patent include: the questioning voice is recognized, the virtual students give an instruction to ask hands according to the recognized voice, the teacher can answer the questions, after the answers are finished, the teacher can judge and evaluate the conditions of the answers, if the answers are incorrect, other virtual students can answer the questions continuously until the answers are correct. All the virtual students who answer the questions are asked at random, and the teachers and the norms can judge and evaluate uniformly after all the answers are finished. By means of the virtual classroom questioning system, questioning in a real classroom is simulated, and teachers and virtual students can realize barrier-free communication in the virtual classroom of VR.
Description
Technical Field
The invention relates to a question asking system and method, belongs to the technical field of virtual reality, and particularly relates to a voice interaction question asking system and method based on a VR virtual classroom.
Background
With the gradual maturity and popularization of the application of the virtual reality technology, the technology is applied to a plurality of fields at home and abroad, such as psychological treatment training, high-cost or high-risk place training, education training, new person interview training and the like. The virtual environment training is used for assisting a practicer to find problems in the training process and give timely guidance and help, the skill of the practicer is enhanced or the training efficiency of the practicer is improved without increasing any extra cost, and the virtual environment training device can be repeatedly used for many times, which is an obvious advantage of training in the virtual environment.
However, the virtual reality technology also has a defect in many current application fields, that is, the trainee needs to have no voice interaction in the system, or only can perform linear operation according to the voice prompt in the system, and the trainee cannot perform voice interaction with one or more virtual characters in the system, so as to realize nonlinear voice interaction. In addition, the existing voice interaction system in the virtual reality technology is not intelligent enough, has not comprehensive functions, is mainly embodied in linear operation, and has inconvenience in use.
The invention relates to a voice interactive questioning system based on a VR virtual classroom, which is used for applying a virtual reality technology to teaching skill training of teachers and students, in particular to teacher and student interactive questioning research in a simulated real ecological classroom.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art and provides a voice interaction questioning system and method based on a VR virtual classroom. According to the system and the method, teacher and student questioning links in real classroom teaching are simulated under a VR virtual classroom environment, seamless voice interaction between teachers and students can be achieved by means of a voice recognition system and a powerful database, and nonlinearity can be achieved through interactive voice. Through this voice interaction questioning system, can solve the pronunciation questioning of teacher-student one-to-many or many-to-one, after the teacher-student questioned promptly, a plurality of virtual students can be at random and answer the question of teacher-student one by one, or a plurality of virtual students ask back teacher-student respectively or answer the question in unison one by one.
The technical problem of the invention is mainly solved by the following technical scheme:
a VR virtual classroom based voice interaction questioning system, comprising:
the voice recognition system is used for extracting a first keyword from a teacher questioning voice signal acquired by the sound pick-up;
the voice keyword library is internally stored with standard voice signals and used for matching the first keywords with second keywords corresponding to the standard voice signals in the library, and after the matching is successful, the standard voice is forwarded to the virtual student to generate a gesture;
and the voice feedback module is used for generating a schematic action according to the standard voice so as to answer the question corresponding to the question voice.
Preferably, the voice interaction questioning system based on the VR virtual classroom includes:
and the server is used for storing a fixed database and a dynamic database in the lesson system, storing a voice keyword library, executing various corresponding operations after voice recognition and outputting corresponding results.
Preferably, in the VR virtual classroom-based voice interaction questioning system, the server establishes virtual classroom scenes and virtual students of different subjects, a dynamic database and a fixed database; the dynamic database stores questions asked by teachers, the number of virtual students capable of answering the questions and answers replicable by each student; the answer results are configurable.
Preferably, the above voice interaction questioning system based on VR virtual classroom further includes:
and the virtual display module is used for displaying the virtual character listened to and spoken in the virtual classroom system to the teacher in a VR mode.
Preferably, the above voice interaction questioning system based on VR virtual classroom further includes:
and the monitoring system is used for recording the questioning voice signals of the teachers and the professors and the output signals of the voice feedback module and feeding the questioning voice signals and the output signals back to the instructors who monitor the lessons of the professors.
A voice interaction questioning method based on a VR virtual classroom comprises the following steps:
setting scene information on a server through a man-machine interaction module, wherein the scene information comprises information of a trained subject, the number of students, question information and answer information; loading the scene information into a memory;
an interactive greeting step, namely, courseware is led into a virtual classroom environment, real classroom scenes are virtualized in a VR helmet, keywords are extracted from greeting voices of teachers and matched with a keyword library in a database on a server, and after matching is successful, voices of all students are called and answered according to greetings of teachers;
and a class simulating step, wherein the voice recognition system recognizes keywords of the question from the language signals acquired by the sound pick-up and matches the keywords with a keyword library in a database on the server, after matching is successful, voice questions corresponding to the keywords are submitted to the virtual students, the virtual students generate schematic actions and answer, and the answers of the virtual students are converted into voice signals through the system to be output.
Preferably, the above voice interaction questioning method based on the VR virtual classroom further includes:
and a random scene simulation step, which is used for triggering the bad expression action set on the server, simulating the bad action in a virtual classroom, and stopping the simulation of the bad action after the sound pickup picks up the voice signal for stopping the bad action by the teacher.
Preferably, in the VR virtual classroom-based voice interaction questioning method, the step of lesson leaving interaction is that the server calls the fixed database, the voice recognition system recognizes and matches the keywords of lesson leaving, and then calls lesson leaving voices, and the teacher and the virtual students make interactive voices such as lesson leaving prompt and leaving greeting.
Preferably, in the above voice interaction questioning method based on the VR virtual classroom, in the scene configuration step, a student questioning link is set for a plurality of key knowledge points.
Preferably, in the above VR virtual classroom-based voice interaction question-asking method, in the teaching simulation step, after the first student finishes answering, the other virtual students continue to answer, and after the teacher thinks that the answer can be finished, the question is summarized and evaluated.
Therefore, the invention has the following advantages: the virtual classroom teaching system can simulate real teaching scenes through the VR virtual classroom voice interaction questioning system, seamlessly and barrier-free voice communication between teachers and students in the virtual classroom is realized, the teaching skill effect of the teachers and students in the virtual classroom is effectively improved, and real classroom teaching environments are reproduced through the virtual classroom scenes, so that the teachers and students can quickly master various teaching skills.
Drawings
FIG. 1 is a schematic structural diagram of a VR-based virtual classroom voice interaction questioning system;
FIG. 2 is a diagram of question and answer information input based on a VR virtual classroom voice interaction question system;
FIG. 3 is a diagram of voice recognition based on a VR virtual classroom voice interaction questioning system;
FIG. 4 is a schematic flow chart of a VR-based virtual classroom voice interaction questioning system;
fig. 1, a sound pickup; 2. a speech recognition system; 3. a speech keyword library; 4. a server; 5. feeding back voice; 6. a virtual student; 7. and monitoring the system.
In FIG. 3, 1-Voice input; 2. a pretreatment section; 3. extracting keywords; 4. a database; 5. performing voice recognition; 6. and outputting the result.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b):
the structure of the embodiment of the voice interactive questioning system based on the VR virtual classroom of the present invention, as shown in fig. 1, includes a sound pickup 1; a speech recognition system 2; a speech keyword library 3; a server 4; a feedback voice 5; a virtual student 6; and a listening system 7.
The sound pickup 1 is used for inputting the voice of the teacher in class into the virtual classroom system and preparing for voice recognition of the following system.
And the voice recognition system 2 is used for recognizing the sound picked up by the sound pick-up in front, extracting keywords in the voice and converting the keywords into types which can be executed by the server.
And the voice keyword library 3 is used for comparing keywords extracted from the voice recognition system with keywords in the library, when the comparison is successful, the voice is forwarded to all virtual students in class, and after the voice signal is input by the students, the students can generate corresponding schematic actions to select the voice keywords and answer corresponding voice questions of the corresponding keywords.
And the server 4 is used for storing a fixed database and a dynamic database in the lesson system, storing a voice keyword library, executing various corresponding operations after voice recognition and outputting corresponding results.
And the feedback voice 5 is used for outputting the answer content of the virtual student in a common voice form after the keyword matching is successful.
And the monitoring system 7 is used for outputting the voice output by the voice feedback part in a voice form, so that teachers who train teachers and norms can conveniently watch the lesson condition of teachers and norms.
Referring to fig. 1 and 4, the present invention will be described in further detail with reference to the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.
As shown in fig. 1, the VR virtual classroom-based voice interactive questioning system provided by the present invention includes: the system comprises a server, a dynamic database and a fixed database, wherein virtual classroom scenes and virtual students of different disciplines, the dynamic database and the fixed database are established on the server; the questions asked by the teacher, the number of virtual students capable of answering the questions and the answers answered by each student are established in the dynamic database, the answers can be set to be correct or wrong according to the needs of the teacher, and meanwhile, the questions asked by a plurality of students aiming at some key knowledge points are also established, and the number of students who need to set questions is also set so as to avoid endless questions. Fixed words for teachers and students to go on class are established in the fixed database and used for interaction between teachers and students before class and during class.
The invention relates to a VR virtual classroom-based voice interaction questioning system, which comprises the following working processes:
when a teacher gives a virtual classroom for training, firstly, information of a subject trained by the teacher and the number of students are set on a server, then questions to be asked of the students during training are set, several students answer the questions and answers to the questions are set, and the questions to be asked of each question are set as shown in fig. 2. Meanwhile, students may have questions to the teacher students for some knowledge points in the training, at this time, the teacher students also need to select several students to ask questions for the knowledge points for some key knowledge points, the answers at this time do not need to be set, and only the questions need to be set, because the answers at this time are the teacher students, they can freely answer the questions according to the questions of the students in combination with the performance of the students in the classroom. In order to truly restore the classroom situation, some poor performance settings, such as joint and ear connection, can be carried out on the server for some students. After the setting is completed, clicking a random distribution button on a system of the server to ensure that all the settings have randomness.
The randomness setting finished on the server mainly aims to ensure that students who ask questions, answer and do not express bad behaviors are the same persons all the time, the randomness is set, the actions occur randomly, and the teaching process in a virtual classroom can simulate the real classroom teaching process. Finally, a voice recognition system is required to be arranged on the server, and keywords of each question are deployed; it is necessary to mark the key knowledge points of the courseware as the mark points for the start of questioning, so that the operation on the server is basically completed.
After all the related setting work is completed, the following process occurs in the teaching and training process. After a teacher wears a VR helmet, students who train himself and scene requirements are selected, courseware needed to be used for teaching himself is guided into a virtual classroom environment, the situation seen in the VR helmet is the same as the real classroom situation, when a class ring is heard, the teacher starts to attend a class, the teacher calls the virtual student to greet, a pickup extracts greeting voice of the teacher and the teacher is matched with a keyword library in a database on a server after keywords are extracted, after successful matching, interactive voice in a fixed database is called, the server calls voice of all students, and the students answer according to teachers.
After interactive greeting is finished, a formal lesson-taking link is entered, teachers take lessons for students according to courseware of the teachers, when the students begin to take lessons, the students do not ask questions, as the explanation of contents increases and the marked points on the courseware appear, teachers and students can ask questions for key contents, when teachers and students ask questions, a sound pick-up firstly guides a voice signal into a virtual classroom system, a voice recognition system can recognize keywords of the questions according to the questions processed by the system, then the system can match the extracted keywords with a keyword library in a database on a server, when the matching is successful, the voice questions corresponding to the keywords can be submitted to virtual students, the set virtual students can give up hands to instruct the teachers and the students, the teachers and the students can answer the questions one by one, the answers of the virtual students are converted into voice signals through the system, then outputting the answer voice through a monitoring system; after the first student finishes answering, the teacher can continue to answer other virtual students, and after the teacher thinks that the answer can be finished, the teacher can summarize and evaluate the question, and can evaluate each answered student respectively. Similarly, when the teacher explains to a place where students are difficult to understand or the students are prone to making mistakes, the speech recognition system recognizes the keywords of the difficulty, then matches the keywords with the keyword library in the database, calls the problems about the knowledge of the difficulty in the database after the matching is successful, then triggers the students to ask the difficulty to speak, and similarly, the teacher can ask a plurality of students to speak.
Because the class under the virtual environment is a simulated real class scene, when the class enters a certain period of time, the bad performance action set on the server is randomly triggered, at the moment, a plurality of students have bad learning performance in the virtual class, when the teacher and the teacher see the situation, the student can be stopped by applying the language immediately, and similarly, after the sound pick-up picks up the voice signals of the teacher and the teacher, the voice recognition system converts the voice signals into signals which can be recognized in the virtual class, and when the system recognizes the name of the student, the student stops the bad learning performance.
And finally, with the end of the class, the server calls the fixed database again, just like the process of beginning the class, after the speech recognition system recognizes the keywords, the speech recognition system matches the database on the server, then calls class leaving and class leaving speech, and the teacher and the virtual students do interactive speech such as class leaving prompt, class leaving and greeting and the like, so that the training process is ended.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (7)
1. A voice interaction questioning system based on a VR virtual classroom is characterized by comprising:
the voice recognition system is used for extracting a first keyword from a teacher questioning voice signal acquired by the sound pick-up;
the voice keyword library is internally stored with standard voice signals and used for matching the first keywords with second keywords corresponding to the standard voice signals in the library, and after the matching is successful, the standard voice is forwarded to the virtual student to generate a gesture;
the voice feedback module is used for generating a gesture according to the standard voice so as to answer the question corresponding to the question voice;
the server is used for storing a fixed database and a dynamic database in the lesson system, storing a voice keyword library, executing various corresponding operations after voice recognition and outputting corresponding results; establishing virtual classroom scenes and virtual students, a dynamic database and a fixed database of different subjects on the server; the dynamic database stores questions asked by teachers, the number of virtual students capable of answering the questions and answers replicable by each student; the answer result is configurable;
further comprising: and the virtual display module is used for displaying the virtual character listened to and spoken in the virtual classroom system to the teacher in a VR mode.
2. The VR virtual classroom based voice interaction question system of claim 1, further comprising:
and the monitoring system is used for recording the questioning voice signals of the teachers and the professors and the output signals of the voice feedback module and feeding the questioning voice signals and the output signals back to the instructors who monitor the lessons of the professors.
3. A voice interaction question method based on a VR virtual classroom is characterized by comprising the following steps:
setting scene information on a server through a man-machine interaction module, wherein the scene information comprises information of a trained subject, the number of students, question information and answer information; loading the scene information into a memory;
an interactive greeting step, namely, courseware is led into a virtual classroom environment, real classroom scenes are virtualized in a VR helmet, keywords are extracted from greeting voices of teachers and matched with a keyword library in a database on a server, and after matching is successful, voices of all students are called and answered according to greetings of teachers;
and a class simulating step, wherein the voice recognition system recognizes keywords of the question from the language signals acquired by the sound pick-up and matches the keywords with a keyword library in a database on the server, after matching is successful, voice questions corresponding to the keywords are submitted to the virtual students, the virtual students generate schematic actions and answer, and the answers of the virtual students are converted into voice signals through the system to be output.
4. The VR virtual classroom-based voice interaction question method of claim 3, further comprising:
and a random scene simulation step, which is used for triggering the bad expression action set on the server, simulating the bad action in a virtual classroom, and stopping the simulation of the bad action after the sound pickup picks up the voice signal for stopping the bad action by the teacher.
5. The VR virtual classroom based voice interaction questioning method of claim 3,
and in the step of course leaving interaction, the server calls a fixed database, after the voice recognition system recognizes and matches the keywords of the course leaving, the voice of the course leaving is called, and teachers and virtual students do interactive voice of course leaving prompt, leaving greeting and the like.
6. The VR virtual classroom based voice interaction questioning method of claim 3,
in the scene configuration step, student questioning links are set aiming at a plurality of key knowledge points.
7. The VR virtual classroom-based voice interaction questioning method according to claim 4, wherein in the teaching simulation step, after a first student finishes answering, other virtual students continue to answer, and after the teacher and the model student think that the answer can be finished, the questioning is summarized and evaluated.
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