CN107193931B - Teaching courseware generation method, online teaching method and device - Google Patents
Teaching courseware generation method, online teaching method and device Download PDFInfo
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Abstract
The invention provides a teaching courseware generation method, an online teaching method and a device, wherein the teaching courseware generation method comprises the following steps: collecting teaching audio and video of a teacher during class giving; receiving an event generation request triggered by a teacher; generating events corresponding to the event generation request according to the event generation request, wherein the events comprise a teaching material display event, an exercise link entering event and an instrument interaction event; and determining the teaching audio and video, the generated events and a preset material list as teaching courseware. According to the invention, at least one of the events of displaying teaching materials, entering into practice link or interacting with musical instruments of the audio and video is generated after the collected audio and video of the teaching of the teacher, so that the teaching materials, the practice materials or the interaction with musical instruments of students can be displayed by the teaching courseware when the students use the teaching courseware to study, the video content is rich, and the teaching effect is improved.
Description
Technical Field
The invention relates to the fields of education and data processing, in particular to a teaching courseware generation method, an online teaching method and an online teaching device.
Background
With the rapid development of internet technology, internet technology is beginning to be applied to various industries such as education, industry, military and the like. The internet technology is applied to the education industry, so that the online teaching method realized through the internet can be produced.
At present, online education generally comprises a live broadcast mode and a prerecording mode, the prerecording mode in the prior art generally refers to that a teacher generally records videos of the teacher when the teacher speaks in class, then the recorded videos are sent to a server, and students acquire the videos from the server through student client sides and play the videos.
However, the prerecorded video used in the prerecording mode in the prior art has single video content and poor teaching effect.
Disclosure of Invention
In view of the above, an object of the embodiments of the present invention is to provide a method for generating a courseware, an online teaching method and an online teaching device, so as to solve or attempt to alleviate the above technical problems.
In a first aspect, an embodiment of the present invention provides a method for generating a teaching courseware, where the method includes:
collecting teaching audio and video of a teacher during class giving;
receiving an event generation request triggered by the teacher, wherein the event generation request comprises at least one of a teaching material display event generation request, an exercise link entering event generation request and an event interacting with musical instruments generation request;
generating an event corresponding to the event generation request according to the event generation request, wherein the event comprises a teaching material display event, an exercise link entering event and an instrument interaction event;
and determining the teaching audio and video, the generated events and a preset material list as teaching courseware.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where when the event generation request includes a display teaching material event generation request, the display teaching material generation request carries a display time of a teaching material to be displayed and an identifier of the teaching material to be displayed;
the generating an event corresponding to the event generation request according to the event generation request includes:
recording the display time of the teaching material to be displayed and the identification of the teaching material to be displayed;
and generating the display teaching material event according to the display time of the teaching material to be displayed and the identification of the teaching material to be displayed.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the event generation request includes an event generation request for entering an exercise link, and the event generation request for entering the exercise link carries an identifier of time for entering the exercise link and an identifier of an exercise material;
the generating an event corresponding to the event generation request according to the event generation request includes:
recording the time of entering the practice link and the identification of the practice material;
and generating the event of entering the practice link according to the time of entering the practice link and the identification of the practice material.
With reference to the second possible implementation manner of the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the exercise link includes a plurality of sub-exercise links;
the generating of the event of entering the practice link comprises:
acquiring a trigger condition corresponding to each sub-exercise link;
and adding the trigger condition corresponding to each sub-practice link into the practice link entering event.
In a second aspect, an embodiment of the present invention provides an online teaching method, which applies the teaching courseware obtained by the method in the first aspect, where the method includes:
receiving a teaching courseware acquisition request sent by a student client, wherein the teaching courseware acquisition request carries an identifier of a teaching courseware to be acquired;
searching the to-be-acquired teaching courseware from prestored teaching courseware according to the identification, wherein the prestored teaching courseware comprises teaching audio and video and a preset material list and at least one of a teaching material display event, an event of entering an exercise link and an event of interacting with musical instruments of students;
and sending the searched teaching courseware to be acquired to the student client side so that the student client side plays the teaching audio and video to be acquired.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where an event of entering an exercise link is set in the prestored teaching courseware;
the method further comprises the following steps:
acquiring audio and video data streams of the students collected by the student client during practice;
and generating an exercise analysis result of the student according to the audio-video data stream, and sending the exercise analysis result to a teacher client and the student client.
With reference to the first possible implementation manner of the second aspect, an embodiment of the present invention provides a second possible implementation manner of the second aspect, where the exercise link includes a plurality of sub-exercise links;
after the exercise analysis result of the student is generated according to the audio-video data stream, the method further comprises the following steps:
and determining the next sub-exercise link for the student to enter according to the exercise analysis result of the student.
With reference to the second aspect, an embodiment of the present invention provides a third possible implementation manner of the second aspect, where the method further includes:
receiving guidance information sent by the teacher client, wherein the guidance information carries student identification;
and sending the guidance information to a student client corresponding to the student identification according to the student identification.
In a third aspect, an embodiment of the present invention provides a teaching courseware generating device, where the device includes:
the acquisition module is used for acquiring teaching audio and video of a teacher during class teaching;
the receiving module is used for receiving an event generation request triggered by the teacher, wherein the event generation request comprises at least one of a teaching material display event generation request, an exercise link entering event generation request and an instrument interaction event generation request;
the generating module is used for generating an event corresponding to the event generating request according to the event generating request, wherein the event comprises a teaching material displaying event, an exercise link entering event and an instrument interaction event;
and the determining module is used for determining the teaching audio and video, the generated events and a preset material list as teaching courseware.
In a fourth aspect, an embodiment of the present invention provides an online teaching device, which applies a teaching audio and video obtained by using the teaching courseware generating device in the third aspect, where the device includes:
the system comprises a receiving module, a judging module and a judging module, wherein the receiving module is used for receiving a teaching courseware obtaining request sent by a student client, and the teaching courseware obtaining request carries an identifier of a teaching courseware to be obtained;
the searching module is used for searching the to-be-acquired teaching courseware from prestored teaching courseware according to the identification, wherein the prestored teaching courseware comprises teaching audio and video and a preset material list, and at least one of a teaching material displaying event, an event entering an exercise link and an event interacting with musical instruments is also included;
and the sending module is used for sending the searched to-be-acquired teaching courseware to the student client so as to enable the student client to play the to-be-acquired teaching courseware.
In the teaching courseware generation method, the online teaching method and the device provided by the embodiment of the invention, at least one of an audio and video display teaching material event, an exercise link event or a musical instrument interaction event is generated after the collected audio and video of a teacher lecture, so that a student can display the teaching material, the exercise material or the interaction with a musical instrument of the student when the student uses the teaching courseware for learning, the video content is rich, and the teaching effect is improved.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a flowchart illustrating a method for generating a courseware according to embodiment 1 of the present invention;
FIG. 2 is a flow chart of an online teaching method provided in embodiment 2 of the present invention;
fig. 3 is a schematic structural diagram of a teaching courseware generating device provided in embodiment 3 of the present invention;
fig. 4 shows a schematic structural diagram of an online teaching device provided in embodiment 4 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In consideration of the fact that the pre-recorded audio and video is single in content and poor in teaching effect when a pre-recorded online education mode is used in the prior art. Based on this, the embodiment of the invention provides a teaching courseware generation method, an online education method and an online education device, which are described below through an embodiment.
Example 1
Referring to fig. 1, an embodiment of the present invention provides a method for generating a courseware, where the method includes steps S110 to S140, which are described as follows.
And S110, collecting teaching audios and videos of a teacher during class giving.
The execution main body of the embodiment of the invention is the teacher client, wherein the teacher client can be a mobile phone, a computer or a tablet computer.
In the embodiment of the invention, the audio and video of the teacher during class teaching can be collected, and the teaching courseware can be generated; or after the audio and video of the teacher in class are collected, the teaching courseware is generated.
S120, receiving an event generation request triggered by a teacher, wherein the event generation request comprises at least one of a teaching material display event generation request, an exercise link entering event generation request and an event interaction request with a musical instrument;
specifically, the teacher may directly input the event generation request at the teacher client, or click an event generation button on the teacher client.
The above-mentioned interaction with the musical instrument refers to interaction with a student musical instrument, and specifically, refers to sending a control instruction to the student musical instrument to control an indicator light corresponding to a certain component on the student musical instrument to be on.
In the embodiment of the present invention, the teacher-triggered event generation request includes at least one of a teaching material display event generation request, an exercise link entry event generation request, and an event interaction with a musical instrument generation request, which includes the following situations:
1) the event generation request only comprises one of a teaching material display event generation request, an exercise link entering event generation request and a student musical instrument interaction event generation request;
2) the event generation request comprises a teaching material display generation request and an exercise link entering event generation request; or the event generation request comprises a teaching material display generation request and an event interaction request with the musical instrument; or, the event generation request includes an event generation request for entering an exercise link and an event generation request for interacting with the musical instrument;
3) the event generation request comprises a teaching material display generation request, an exercise link entering event generation request and an instrument interaction event generation request.
And S130, generating events corresponding to the event generation request according to the event generation request, wherein the events comprise a teaching material display event, an exercise link entering event and an instrument interaction event.
In the embodiment of the invention, if the event generation request is a request for generating the display teaching material event, the generated event is the display teaching material event; if the event generation request is an event generation request for entering an exercise link, the generated event is an event for entering the exercise link; and if the event generation request is a request for generating an interaction event with the musical instrument, the generated event is the interaction event with the musical instrument.
When the event generation request comprises a display teaching material generation request, the display teaching material generation request carries the display time of the teaching material to be displayed and the identification of the teaching material to be displayed;
the generating an event corresponding to the event generation request according to the event generation request includes:
recording the display time of the teaching material to be displayed and the identification of the teaching material to be displayed; and generating a to-be-displayed teaching material event according to the display event of the to-be-displayed teaching material and the identification of the to-be-displayed teaching material.
The display time of the to-be-displayed teaching material comprises the starting display time of the to-be-displayed teaching material and the ending display time of the to-be-displayed teaching material.
In the embodiment of the invention, the recorded display time of the teaching material to be displayed and the identification of the teaching material to be displayed form a data packet as the event of the teaching material to be displayed.
The identifier of the to-be-displayed teaching material may be a name of the to-be-displayed teaching material or a position of the to-be-displayed teaching material in a preset material list.
When the teaching audio and video is played at the student client, when the teaching material display time of the teaching audio and video is reached, the teaching material display event triggers the display of the teaching material at the current time of the teaching audio and video.
For example, a teacher speaks the tuner at the 5 th second of a video, finishes the tuner at the 10 th second, and during the period, the teacher explains the tuner for the student, and at this time, an event is correspondingly generated, the event is used for recording that the teaching audio/video shows the tuner when playing to the 5 th second, and stops showing the tuner when playing to the 10 th second, and at this time, the tuner may disappear or hide.
In the embodiment of the invention, when the event generation request comprises an event generation request for entering the practice link, the event generation request for entering the practice link carries the time for entering the practice link and the identification of the practice material;
the generating an event corresponding to the event generation request according to the event generation request includes:
recording the time for entering the practice link and the identification of the practice material; and generating the event entering the practice link according to the time entering the practice link and the identification of the practice material.
Specifically, the exercise end condition may be set in the event of entering the exercise link, for example, the exercise end condition may be an exercise end time, and the teacher may set to start entering the exercise link at the 15 th min of the whole video and end the exercise link at the 25 th min of the whole video; the exercise end condition may also be an exercise score, for example, the teacher may set that the exercise link is ended when the exercise score of the student reaches 90 points; or, when the student finishes all the exercise questions in the exercise link, the exercise link is ended, the embodiment of the invention does not limit the specific content of the exercise ending condition, and the teacher can set the exercise ending condition according to practical application.
Specifically, in the embodiment of the present invention, a plurality of sub-exercise links may be set in the exercise link;
therefore, the generating the event of entering the practice link includes:
acquiring a trigger condition corresponding to each sub-exercise link;
and adding the triggering condition corresponding to each sub-practice link into the event of entering the practice link.
Specifically, the triggering condition may be a score, for example, when the exercise score of the student in the current sub-link reaches a preset score, the student may be triggered to enter a next exercise link, and specifically, different exercise scores may be triggered to enter different exercise links, which will be described in the following by way of example.
The method comprises the steps that 5 exercise sub-links are respectively arranged in an exercise link and are recorded as an exercise sub-link A, an exercise sub-link B, an exercise sub-link C, an exercise sub-link D and an exercise sub-link E, all students enter the exercise sub-link A after entering the exercise link, and are determined to enter different exercise sub-links according to the scores of the students in the exercise sub-link A, for example, if the scores of the students in the exercise sub-link A are greater than or equal to 90 minutes, the students are triggered to enter the exercise sub-link B, and if the scores of the students in the exercise sub-link A are less than 90 minutes, the students are triggered to enter the exercise sub-link C, the exercise sub-link D and the exercise sub-link E are arranged behind the exercise sub-link C, and can be triggered to enter the exercise sub-link D or the exercise sub-link E according to the scores of the students in.
The above is only an example, and the specific number and triggering conditions of the specific training sub-links are not limited, and the entry into the training sub-links can be triggered by the scores, and the entry into different training sub-links can also be triggered by the training times of the students.
And when the event generation request is a request for interacting with the musical instrument, determining the time for interacting with the musical instrument, generating an instruction for interacting with the musical instrument, and determining the time for interacting with the musical instrument and the instruction for interacting with the musical instrument as the event for interacting with the musical instrument.
Therefore, when the teaching audio and video is played, the interaction event with the musical instrument triggers the student client to send an interaction instruction to the musical instrument, wherein the interaction instruction is used for interacting with the musical instrument of the student, for example, an indicator light corresponding to a certain component on the musical instrument of the student is controlled to be on.
And S140, determining the teaching audio and video, the generated events and a preset material list as teaching courseware.
According to the teaching courseware generation method provided by the embodiment of the invention, at least one of the events of displaying teaching materials, entering the practice link or interacting with musical instruments of the audio and video is generated after the audio and video of the teaching of the teacher is collected, so that the teaching courseware can display the teaching materials, the practice materials or interact with the musical instruments of the students when the students use the teaching courseware for learning, the video content is rich, and the teaching effect is improved.
Example 2
Referring to fig. 2, an embodiment of the present invention provides an online teaching method, in which a teaching courseware obtained by applying the method provided in embodiment 1 above is obtained, where the method includes steps S210 to 230, which are specifically as follows:
s210, receiving a teaching courseware obtaining request sent by a student client, wherein the teaching courseware obtaining request carries an identification of the teaching courseware to be obtained.
The execution main body of the online teaching method provided by the embodiment of the invention is the server.
When the method provided by the embodiment of the invention is used for online learning, students need to register on the server through the terminal, and after the registration is finished, when the students need to perform online learning, the registered account needs to be logged in the terminal so as to establish connection with the server.
The student sends a teaching courseware obtaining request to the server through the student client, wherein the teaching courseware obtaining request carries an identifier of the teaching courseware obtaining request, and specifically, the identifier can be a name of the teaching courseware to be obtained or a teacher giving a teacher and the like of the teaching courseware to be obtained.
S220, searching the to-be-acquired teaching courseware from prestored teaching courseware according to the identification, wherein the prestored teaching courseware comprises teaching audio and video and a preset material list, and at least one of a teaching material display event, an event entering an exercise link and an event interacting with musical instruments; the teaching course comprises a plurality of teaching courses, teaching materials needing to be displayed in teaching audio and video in each teaching course and exercise materials needing to be displayed when entering an exercise link are stored in a material list included in each teaching course, and the teaching courses pre-stored in the server comprise at least one of teaching material display events, entering the exercise link events and musical instrument interaction events, and the teaching course specifically comprises the following conditions:
1) the pre-stored teaching courseware only comprises one of a teaching material display event, an event of entering an exercise link or an event of interacting with a musical instrument besides a teaching audio/video and a preset material list;
2) the pre-stored teaching courseware comprises a teaching audio and video and a preset material list, and also comprises an event of entering an exercise link and a teaching material display event; or, the pre-stored teaching courseware comprises an event of entering an exercise link and an event of interacting with a musical instrument; or, the pre-stored teaching courseware comprises a teaching audio and video and a preset teaching material, and also comprises a teaching material display event and an event interacting with the musical instrument;
3) the pre-stored teaching courseware comprises a teaching audio and video and a preset teaching material, and also comprises a teaching material display event, an event of entering an exercise link and an event of interacting with a musical instrument.
Specifically, the teaching material display event is used for triggering the display of the teaching material during the playing of the teaching audio and video, for example, when a teacher plays a music score, a music score is displayed at the current audio and video position and changes along with the change of the teacher playing, and for example, when the teacher speaks a guitar, a picture of a guitar is displayed at the current audio and video position so as to be convenient for students to understand.
The teaching material to be displayed can be displayed at the upper left corner, or the upper right corner, the lower left corner, the lower right corner and other positions of the video frame which is currently played, and can also be suspended on the current video frame.
The event of the entering practice link is used for triggering the entering practice link, the entering practice link refers to that when the teaching audio and video is played to a certain position, the practice material is inserted, the practice material is displayed for students, and the students begin to practice according to the practice material.
Specifically, when a teacher explains some parts of the musical instrument or plays a certain string of the musical instrument, the student client is triggered to send a control instruction to the student musical instrument, and the control instruction is used for controlling the indicator light corresponding to the corresponding part on the student musical instrument to be on, so that students can better understand the content spoken by the teacher.
And after the server receives a teaching courseware acquisition request sent by the student client, searching the teaching courseware to be acquired from the prestored teaching courseware according to the identification of the teaching courseware to be acquired carried in the teaching courseware acquisition request.
And S230, sending the searched to-be-acquired teaching courseware to the student client, so that the student client plays the to-be-acquired teaching courseware.
The teaching courseware obtaining request also carries identification of the student client, and after the server finds the teaching courseware to be obtained, the server sends the teaching courseware to be obtained to the student client according to the identification of the student client.
And when the student client receives the to-be-acquired teaching courseware sent by the server, the to-be-acquired teaching courseware starts to be played for the students to study.
In the embodiment of the present invention, when the pre-stored teaching courseware includes an event of entering an exercise link, the method provided in the embodiment of the present invention further includes:
acquiring audio and video data streams of students collected by student client ends during practice; and generating an exercise analysis result of student exercise according to the audio-video data stream, and sending the exercise analysis result to the teacher client and the student client.
Specifically, the pre-stored teaching courseware includes an event of entering an exercise link, and includes the following two situations: the pre-stored teaching courseware only comprises events entering an exercise link except teaching audio and video and a preset material list; the pre-stored teaching courseware comprises at least one of a teaching material display event and an instrument interaction event besides a teaching audio-video and a preset material list and an event of entering an exercise link.
In the embodiment of the invention, when a student enters an exercise link to exercise, the student client end collects audio and video data streams of the student in the exercise and sends the collected audio and video data streams to the server, and after the server receives the audio and video data streams sent by the student client end, the audio and video data streams are analyzed to generate an exercise analysis result of the student.
Specifically, the server analyzes the received audio and video data stream when the student exercises through the following processes:
identifying rhythm points, pitches and timbres in musical tone data in the audio-video data stream to obtain musical tone identification results; identifying finger actions of students in videos in the audio-video data streams to obtain finger action identification results; and generating an exercise analysis result of the student according to the musical tone identification result, the preset standard musical tone, the finger action identification result and the preset standard finger action.
In the embodiment of the invention, when the musical tone data is identified, the elevation change of the audio frequency of the musical tone data is obtained by performing discrete fourier transform and end point detection on the musical tone data, and the rhythm point, the pitch and the timbre in the second musical tone data are determined according to the elevation change of the audio frequency, so that a musical tone identification result is obtained.
The specific procedure for tone recognition by discrete fourier transform and end point detection is as follows:
1) the second musical tone data is time domain data, and the time domain data is firstly subjected to framing processing, specifically, a small segment of time domain data is taken as a frame, generally, data with duration of about 32ms can be taken as a frame, and the musical tone data is divided into multi-frame data;
2) performing packet processing on the multi-frame data, wherein 1-3 frame data are approximately one data packet to obtain a plurality of data packets;
3) and calculating the energy of each frame of data and the energy of each packet of data, and detecting an end point according to the energy of each frame of data and the energy of each packet of data.
Specifically, the following description will be given of a process of calculating the energy of each frame of data and the energy of each packet of data with data having a duration of about 32ms as one frame of data:
the energy per frame of data is calculated by the following formula:
wherein, in the above formula, EnnRefers to the energy of the n-th frame data, n represents the n-th time domain data in the time domain data included in the time domain data of about 32ms, ykThe kth time domain data is shown, and k is 1,2, 3 … n.
Assuming that each packet includes two frames of data, the energy of each packet is calculated by the following formula:
Epd＝En1+En2
wherein, in the above formula, EpdRefers to the energy of the d-th packet.
Setting lambda as an energy mutation factor, and calculating the energy mutation factor by the following method;
λ1＝Ep1-Ep2
λ2＝Ep2-Ep1
λn-1＝Epd-Epd-1
calculating energy mutation factors among continuous data packets through the formula, comparing the energy mutation factors with preset energy mutation factors, and if the energy mutation factors are larger than the preset energy mutation factors, determining that energy mutation points exist at the energy mutation points, namely determining that the end points are located, for example, lambdakGreater than the predetermined energy mutation factor, then it can be determined that Ep is presentk+1At the energy mutation point, the k frame data E can be determinedkI.e. the end points.
And if the energy mutation factor is smaller than the preset energy mutation factor, calculating a detection end point by a frequency domain method.
4) If the energy mutation factor is smaller than the preset energy mutation factor, performing discrete Fourier transform on the time domain data after framing and subpackaging to obtain frequency domain data corresponding to each data packet;
in the time domain data, the time domain data included in each data packet is assumed to be x1、x2…xmFirstly, windowing is carried out on the time domain data in the data packet, a Hanning window is adopted, and a window function is as follows:
x(m)＝x(m)*h(m)
the above h (m) is a window function, m refers to the mth time domain data in the data packet, N refers to the data length of the data packet, and the above x (m) is the time domain data after the windowing process.
Converting the time domain data into frequency domain data according to the following discrete Fourier transform;
wherein, in the above formula, HkFor the frequency domain data, k is 0,1,2, …, N-1, x (m) is the mth time domain data after windowing.
5) Performing power spectrometry on the frequency domain data obtained by the calculation, specifically by using the following formula:
in the above formula, p (k) is a power value corresponding to the kth frequency domain data, a plurality of power values p (1), p (2) … p (m) may be calculated, and the power values are compared, so that peak data in the frequency domain data may be determined, for example, p (1) < p (2), and p (3) < p (2), and then p (2) is determined to be a peak, and according to the method, all peak data in the frequency domain data may be determined.
6) Calculating a characteristic peak in the frequency domain data according to the peak data, specifically by the following steps:
the peak data obtained in step 5) may be referred to as a peak data set, which is referred to as a (f), and a (f) { P ═ Pindex1，Pindex2，…，Pindexf}，Pindex1，Pindex2，…，PindexfRespectively, peak data.
Sequencing the peak data in the step A (f) from big to small, intercepting the first Z peak data, and calculating the minimum value of the side lobe difference value in the current peak data; and determining a characteristic peak according to the minimum value of the side lobe difference value.
In the embodiment of the present invention, the first Z peak data bits are truncated to form a bit array b (Z), where b (Z) is PindexDetermining a first side lobe value and a second side lobe value of the array B (Z);
the determined first side lobe value is Pindex-1，Pindex+1(ii) a The second sidelobe value is determined to be Pindex-2，Pindex+2；
The sidelobe difference is calculated by the following formula:
det11＝Pindex-Pindex-1
det12＝Pindex-Pindex+1the minimum value of det11 and det12 is min1
det21＝Pindex-Pindex-2
det22＝Pindex-Pindex+2The minimum value of det21 and det22 is min2
And comparing the min1 and the min2 with preset values respectively, and if preset conditions are met, determining the Pindex as a characteristic peak.
7) Calculating the frequency corresponding to the characteristic peak;
in the above formula, index is an index of the characteristic peak, that is, an index of the frequency domain data corresponding to the characteristic peak, for example, the first frequency domain data or the second frequency domain data, S is a sampling rate, and N is a length of the data packet.
8) Calculating the data corresponding to the characteristic peak, including characteristic peak energy and characteristic peak frequency;
det1(n) ═ e1, e2,.., en (energy)
det1(n) ═ c1, c2,.., cn (frequency)
det2(m) ═ e1, e2, em (energy)
det2(m) ═ c1, c2, a
The det1 refers to a first data packet, the det2 refers to a second data packet, and then the similarity of the data of the two data packets is compared to determine an end point, and the specific process comprises the following steps:
comparing the frequency data in det1 and det2, wherein the comparison rule is that a cn array in a loop det1 is adopted, and c1, c2, cn is compared in a cm array in det2, if the cn is equal to cm or 2cm, cn is equal to 3cm, cm is equal to 2cn, and cm is equal to 3cn, namely, the cn value is determined to have correlation; if there is correlation in the loop result, i.e. no endpoint is determined, the loop continues, if there is uncorrelated data, then there is no correlated data recorded, and the loop continues to compare det2 and det3, if the result is completely correlated, i.e. an endpoint is determined to be present at det2, and if there is not complete correlation, i.e. no endpoint continues the loop.
Specifically, the endpoints include a tempo point, a pitch, and a timbre.
The video actually includes multiple frames of video frames, and each frame of video frame is a static image, so the process of identifying the video is actually the process of image identification, and the process of image identification belongs to the prior art, and therefore the specific process of identifying the video is not repeated here.
Through the identification of the video, the finger action of the student when playing the musical instrument can be obtained.
After determining the musical sound recognition result and the finger action recognition result, comparing the rhythm point, the pitch and the tone in the musical sound recognition result with the rhythm point, the pitch and the tone in the preset standard musical sound, and comparing the finger recognition result with the preset standard finger action, determining the exercise score of the student through the comparison, and the places which are not standard or go wrong in the student exercise, and forming the exercise analysis result of the student by the exercise score of the student and the places which are not standard or go wrong in the student exercise.
In the embodiment of the present invention, a report may be generated according to the exercise analysis result, and the exercise analysis result may be sent to the teacher client in the form of a report.
In addition to the above situation, in the embodiment of the present invention, after the audio-video data stream of the student during exercise is collected, the student client simply identifies the musical tone data in the audio-video data stream, obtains the rhythm point and pitch identification result in the musical tone data, compares the rhythm point and pitch with the standard musical tone preset by the student client to obtain the preliminary analysis result, where the preliminary analysis result includes the exercise score of the student, and sends the preliminary analysis result and the audio-video data stream to the server together;
after the server obtains the preliminary analysis result and the audio and video data stream sent by the student client, the server further analyzes the audio and video data stream, mainly analyzes the video in the audio and video data stream, and identifies the tone of the music in the audio and video data stream to obtain the exercise analysis result of the student.
Under the condition, the exercise scores of the students can be displayed on the student client in real time through the primary analysis of the student client.
In the embodiment of the invention, the exercise analysis result generated according to the audio-video data flow of the student during exercise is sent to the student client and the teacher client.
The exercise analysis result is sent to the student client, so that students can know the exercise condition of the students; the training analysis result is sent to the teacher client, so that the teacher can master the training condition of the students, and then the students can be guided independently.
In the embodiment of the invention, a plurality of sub-exercise links can be further arranged in the exercise link, and students enter different next sub-exercise links according to the analysis result of the current sub-exercise, so that the students with different levels can carry out different exercises, and the teaching effect is improved. The method specifically comprises the following steps:
and after the exercise analysis result of the student is generated according to the audio-video data stream, determining the next sub-exercise link for the student to enter according to the exercise analysis result of the student.
Specifically, the exercise analysis result includes information such as exercise scores of the students and exercise times of the students, and a next sub-exercise link that the students enter can be determined according to the exercise scores of the students, and also can be determined according to the exercise times.
As an embodiment, the teacher can determine the mastering conditions of the students according to the exercise analysis results of the students, and if some students need to independently guide, the teacher can guide the students on line through a teacher client, and the specific process comprises the following steps:
receiving guidance information sent by a teacher client, wherein the guidance information carries student identification; and sending the guide information to a student client corresponding to the student identification according to the student identification.
Specifically, the teacher may click the identification of the student at the teacher client and send guidance information to the student, the teacher client first sends the guidance information to the server, and after receiving the guidance information sent by the teacher client, the server sends the guidance information to the student client.
In the embodiment of the invention, the students can also actively send help seeking information to the teacher, for example, when the students do practice, the students can not practice repeatedly for many times, at this time, the students can send help seeking information to the teacher, and specifically, the students can send help seeking information to the teacher by clicking the identification of the teacher on the client side of the students.
According to the online teaching method provided by the embodiment of the invention, the teaching courseware sent to the students comprises at least one of a teaching material display event, an event entering a practice link and an event interacting with musical instruments, and also comprises a teaching audio and video and a preset teaching material, wherein the teaching material display event can trigger the display of the teaching material when the teaching audio and video is played, the event entering the practice link can trigger the entry of the practice link when the teaching audio and video is played, the event interacting with the musical instruments can trigger the interaction with the musical instruments of the students when the teaching audio and video is played, the content of the teaching video is rich, and the teaching effect is improved.
Example 3
Referring to fig. 3, an embodiment of the present invention provides a teaching courseware generating device, which may be a terminal device, and the device is configured to execute the teaching courseware generating method provided in embodiment 1 of the present invention, where the device includes an acquisition module 310, a receiving module 320, a generating module 330, and a determining module 340, and specifically includes:
the acquisition module 310 is configured to acquire teaching audios and videos of a teacher during class teaching;
the receiving module 320 is configured to receive an event generation request triggered by the teacher, where the event generation request includes at least one of a teaching material display generation request, an exercise link entering generation request, and an event interaction with a musical instrument generation request;
the generating module 330 is configured to generate an event corresponding to the event generating request according to the event generating request, where the event includes an event of displaying a teaching material, an event of entering an exercise link, and an event of interacting with a musical instrument;
the determining module 340 is configured to determine the teaching audio/video, the generated event, and a preset material list as a teaching courseware.
As an embodiment, when the event generation request includes a display teaching material generation request, the display teaching material generation request carries display time of a teaching material to be displayed and an identifier of the teaching material to be displayed;
the generating module 330 generates an event corresponding to the event generation request according to the event generation request, and is implemented by a first recording unit and a first generating unit, and specifically includes:
the first recording unit is used for recording the display time of the teaching material to be displayed and the identification of the teaching material to be displayed; the first generating unit is used for generating a teaching material displaying event according to the displaying time of the teaching material to be displayed and the identification of the teaching material to be displayed.
As an embodiment, when the event generation request includes an event generation request for entering an exercise link, the event generation request for entering the exercise link carries an identifier of time for entering the exercise link and an identifier of exercise materials;
the generating module 330 generates an event corresponding to the event generation request according to the event generation request, and is implemented by a second recording unit and a second generating unit, and specifically includes:
the second recording unit is used for recording the time of entering the practice link and the identification of the practice material; the second generating unit is configured to generate the event of entering the practice link according to the time of entering the practice link and the identifier of the practice material.
Specifically, in the embodiment of the present invention, a plurality of sub-exercise links may be provided in the exercise link;
the event of entering the practice link generated by the second generating unit is realized by the acquiring subunit and the adding subunit, and specifically comprises the following steps:
the acquiring subunit is configured to acquire a trigger condition corresponding to each sub-training link; the adding subunit is configured to add the trigger condition corresponding to each sub-practice link to the practice link entering event.
The teaching courseware generation device provided by the embodiment of the invention generates at least one of an audio and video display teaching material event, an exercise link entering event or a musical instrument interaction event after the collected audio and video of the teacher lecture, so that a student can display the teaching material, the exercise material or the interaction with the musical instrument of the student when using the teaching courseware for learning, the video content is rich, and the teaching effect is improved.
Example 4
Referring to fig. 4, an embodiment of the present invention provides an online teaching device, where the device applies the teaching courseware obtained by the teaching courseware generating device in embodiment 3, where the device may be a server, and the device is configured to execute the online teaching method provided in embodiment 2 of the present invention, where the device includes a receiving module 410, a searching module 420, and a sending module 430, and specifically includes:
the receiving module 410 is configured to receive a teaching courseware obtaining request sent by a student client, where the teaching courseware obtaining request carries an identifier of a teaching courseware to be obtained;
the search module 420 is configured to search the to-be-acquired teaching courseware from prestored teaching courseware according to the identifier, where the prestored teaching courseware includes teaching audio/video and a preset material list, and further includes at least one of a teaching material display event, an event entering an exercise link, and an event interacting with a musical instrument;
the sending module 430 is configured to send the searched to-be-acquired teaching courseware to the student client, so that the student client plays the to-be-acquired teaching courseware.
When the pre-stored teaching courseware is provided with an event for entering an exercise link, the device further comprises an acquisition module and a generation module;
the acquisition module is used for acquiring audio and video data streams collected by the student client during exercise of the students; and the generating module is used for generating exercise analysis results of the students according to the audio and video data streams and sending the exercise analysis results to the teacher client and the student client.
Specifically, the exercise link may include a plurality of sub-exercise links;
therefore, the apparatus provided by the embodiment of the present invention further includes a determining module;
the determining module is used for determining the next sub-exercise link for the student to enter according to the exercise analysis result of the student.
As an embodiment, the apparatus provided in the embodiment of the present invention further includes an information receiving module;
the information receiving module is used for receiving the guide information sent by the teacher client, wherein the guide information carries the student identification;
the sending module 430 is further configured to send the guidance information to a student client corresponding to the student identifier according to the student identifier.
According to the on-line teaching device provided by the embodiment of the invention, the teaching courseware sent to the students comprises at least one of a teaching material display event, an event entering a practice link and an event interacting with musical instruments, and also comprises a teaching audio and video and a preset teaching material, wherein the teaching material display event can trigger the display of the teaching material when the teaching audio and video is played, the event entering the practice link can trigger the entry of the practice link when the teaching audio and video is played, the event interacting with the musical instruments can trigger the interaction with the musical instruments of the students when the teaching audio and video is played, the content of the teaching video is rich, and the teaching effect is improved.
The teaching courseware generating device and the online teaching device provided by the embodiment of the invention can be specific hardware on equipment or software or firmware installed on the equipment and the like. The device provided by the embodiment of the present invention has the same implementation principle and technical effect as the method embodiments, and for the sake of brief description, reference may be made to the corresponding contents in the method embodiments without reference to the device embodiments. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the foregoing systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments provided by the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be further defined and explained in subsequent figures, and moreover, the terms "first", "second", "third", etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the present invention in its spirit and scope. Are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. An online teaching method, the method comprising:
receiving a teaching courseware acquisition request sent by a student client, wherein the teaching courseware acquisition request carries an identifier of a teaching courseware to be acquired;
searching the to-be-acquired teaching courseware from prestored teaching courseware according to the identification, wherein the prestored teaching courseware comprises teaching audio and video and a preset material list, and at least one of a teaching material display event, an event entering an exercise link and an event interacting with musical instruments;
sending the searched to-be-acquired teaching courseware to the student client side so that the student client side can play the to-be-acquired teaching courseware;
when the pre-stored teaching courseware comprises an event of entering an exercise link;
the method further comprises the following steps:
acquiring audio and video data streams of the students collected by the student client during practice;
generating an exercise analysis result of the student according to the audio-video data stream, and sending the exercise analysis result to a teacher client and the student client;
generating the exercise analysis results according to the following steps:
identifying rhythm points, pitches and timbres in the musical tone data in the audio-video data stream to obtain musical tone identification results; identifying the finger action of the student in the video in the audio-video data stream to obtain a finger action identification result; generating an exercise analysis result of the student according to the music recognition result, a preset standard music, the finger action recognition result and a preset standard finger action;
wherein the teaching courseware is determined according to the following steps:
collecting teaching audio and video of a teacher during class giving;
receiving an event generation request triggered by the teacher, wherein the event generation request comprises at least one of a teaching material display event generation request, an exercise link entering event generation request and an event interacting with musical instruments generation request;
generating an event corresponding to the event generation request according to the event generation request, wherein the event comprises a teaching material display event, an exercise link entering event and an instrument interaction event;
and determining the teaching audio and video, the generated events and a preset material list as teaching courseware.
2. The method according to claim 1, wherein when the event generation request includes a display teaching material event generation request, the display teaching material generation request carries the display time of the teaching material to be displayed and the identifier of the teaching material to be displayed;
the generating an event corresponding to the event generation request according to the event generation request includes:
recording the display time of the teaching material to be displayed and the identification of the teaching material to be displayed;
and generating the display teaching material event according to the display time of the teaching material to be displayed and the identification of the teaching material to be displayed.
3. The method of claim 1, wherein the event generation request comprises an event generation request for entering an exercise link, and the event generation request for entering the exercise link carries an identifier of time for entering the exercise link and exercise materials;
the generating an event corresponding to the event generation request according to the event generation request includes:
recording the time of entering the practice link and the identification of the practice material;
and generating the event of entering the practice link according to the time of entering the practice link and the identification of the practice material.
4. The method of claim 3, wherein the exercise session comprises a plurality of sub-exercise sessions;
the generating of the event of entering the practice link comprises:
acquiring a trigger condition corresponding to each sub-exercise link;
and adding the trigger condition corresponding to each sub-practice link into the practice link entering event.
5. The method of claim 1, wherein the exercise session comprises a plurality of sub-exercise sessions;
after the exercise analysis result of the student is generated according to the audio-video data stream, the method further comprises the following steps:
and determining the next sub-exercise link for the student to enter according to the exercise analysis result of the student.
6. The method of claim 1, further comprising:
receiving guidance information sent by the teacher client, wherein the guidance information carries student identification;
and sending the guidance information to a student client corresponding to the student identification according to the student identification.
7. An online teaching device, the device comprising:
the first receiving module is used for receiving a teaching courseware obtaining request sent by a student client, wherein the teaching courseware obtaining request carries an identification of a teaching courseware to be obtained;
the searching module is used for searching the to-be-acquired teaching courseware from prestored teaching courseware according to the identification, wherein the prestored teaching courseware comprises teaching audio and video and a preset material list, and at least one of a teaching material display event, an event of entering an exercise link and an event of interacting with a musical instrument;
the sending module is used for sending the searched teaching courseware to be obtained to the student client side so that the student client side can play the teaching courseware to be obtained;
when the pre-stored teaching courseware comprises an event of entering an exercise link;
the apparatus is further configured to:
acquiring audio and video data streams of the students collected by the student client during practice;
generating an exercise analysis result of the student according to the audio-video data stream, and sending the exercise analysis result to a teacher client and the student client;
the apparatus is further configured to:
identifying rhythm points, pitches and timbres in the musical tone data in the audio-video data stream to obtain musical tone identification results; identifying the finger action of the student in the video in the audio-video data stream to obtain a finger action identification result; generating an exercise analysis result of the student according to the music recognition result, a preset standard music, the finger action recognition result and a preset standard finger action;
the teaching courseware generation method is realized through the following devices:
the acquisition module is used for acquiring teaching audio and video of a teacher during class teaching;
the second receiving module is used for receiving an event generation request triggered by the teacher, wherein the event generation request comprises at least one of a teaching material display event generation request, an exercise link entering event generation request and an instrument interaction event generation request;
the generating module is used for generating an event corresponding to the event generating request according to the event generating request, wherein the event comprises a teaching material displaying event, an exercise link entering event and an instrument interaction event;
and the determining module is used for determining the teaching audio and video, the generated events and a preset material list as teaching courseware.
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| CN109284473A (en) * | 2018-11-20 | 2019-01-29 | 育宁教育科技(上海)有限公司 | The editor of online teaching courseware and generation method and system |
| CN109637221B (en) * | 2019-01-28 | 2021-03-30 | 厦门云开云科技有限公司 | Electronic courseware for online learning and generation method |
| CN110570698B (en) * | 2019-08-21 | 2022-04-26 | 北京大米科技有限公司 | Online teaching control method and device, storage medium and terminal |
| CN110475158B (en) * | 2019-08-30 | 2022-01-18 | 北京字节跳动网络技术有限公司 | Video learning material providing method and device, electronic equipment and readable medium |
| CN111158822A (en) * | 2019-12-26 | 2020-05-15 | 北京大米科技有限公司 | Display interface control method and device, storage medium and electronic equipment |
| CN112307399A (en) * | 2020-11-06 | 2021-02-02 | 北京一起教育科技有限责任公司 | Automatic generation method and device of interactive courseware |
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Denomination of invention: A teaching courseware generation method, online teaching method and device Granted publication date: 20200703 Pledgee: China Construction Bank Corporation Beijing Anhua Sub-branch Pledgor: BEIJING YINYUEJIA TECHNOLOGY CO.,LTD. Registration number: Y2024980004976 |