CN107103916B - Music starting and ending detection method and system applied to music fountain - Google Patents
Music starting and ending detection method and system applied to music fountain Download PDFInfo
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- CN107103916B CN107103916B CN201710262638.6A CN201710262638A CN107103916B CN 107103916 B CN107103916 B CN 107103916B CN 201710262638 A CN201710262638 A CN 201710262638A CN 107103916 B CN107103916 B CN 107103916B
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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
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/78—Detection of presence or absence of voice signals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/08—Fountains
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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
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/48—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use
- G10L25/51—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use for comparison or discrimination
Abstract
The invention provides a music starting and ending detection method and a system thereof applied to a music fountain, wherein the method comprises the following steps: before music is played, signals of a music channel are collected, clutter signal conditions of the signals are analyzed and detected through a clutter detection algorithm, and transient interference conditions of the signals are analyzed and detected through a transient interference detection algorithm; inquiring the detection results of the clutter detection algorithm and the start transient interference detection algorithm through a start detection algorithm, and judging whether music starts to be played or not according to a level value detection unit and a signal jump detection unit; after the music is detected to start playing, whether the music playing is finished or not is judged through a finishing detection algorithm. The music starting and ending detection method applied to the music fountain has the advantages of small calculated amount, high reliability and strong anti-interference capability.
Description
Technical Field
The invention relates to the technical field of music fountain processing, in particular to a music starting and ending detection method and system applied to a music fountain.
Background
The music fountain is popular among people in various tourist attraction, large square, garden landscape and other occasions as an artistic waterscape with higher ornamental value, and the expression form of music and the fountain brings people with very sufficient dynamic experience in sense of hearing and vision. The music fountain is a product combining waterscape and music appreciation in recent years, and is a perfect combination of high technology and nature. The music fountain can integrate waterscape and music, and give people feelings of shock and surge along with music, and landscape ornamental, music ornamental and infection values.
The special frequency converter for the music fountain is digital fountain control equipment based on music signals, can be used for controlling a water pump motor to generate variable fountain water columns, and is characterized in that the running frequency of the motor and the music signals synchronously change. The synchronous processing of the frequency converter comprises three aspects of the starting, ending and playing processes of the music signals, and the starting and ending detection directly determines the accuracy of the control system, so that the detection method is required to have extremely high reliability.
The signal source of the detection method in the prior art is a level signal after music is processed by an analog circuit, and is easily subjected to external electromagnetic interference, and the interference can seriously influence the results of the start and end detection algorithm. The electromagnetic interference mainly comprises clutter interference existing all the time and interference at the beginning and ending moments, and the moment interference mainly considers the beginning moment interference because even if the moment interference is generated after the playing operation is ended, the music level jumps to zero quickly, the frequency converter stops outputting, and after the moment interference is generated, the frequency converter may output frequency in advance, so that the water column and the music signal are not synchronous. For these interference problems, the conventional solutions are to improve the detection circuit to enhance the anti-interference capability or to adopt a complex filtering algorithm to improve the accuracy of the detection method. Improving the detection circuit may increase the hardware cost or even make it incompatible with existing devices. The complex filtering algorithm greatly occupies the resources of the control chip, and may cause the automatic reset of the chip and the lag of the detection result of the music start.
Therefore, it is necessary to design a simple and practical music start and end detection method with high anti-interference capability.
Disclosure of Invention
Aiming at the problems, the invention aims to design a music starting and ending detection method and a system thereof applied to a music fountain, and the method and the system have the advantages of small calculated amount, high reliability and strong anti-interference capability.
The specific technical scheme of the invention is as follows:
a music start and end detection method applied to a music fountain comprises the following steps:
before music is played, signals of a music channel are collected, clutter signal conditions of the signals are analyzed and detected through a clutter detection algorithm, and transient interference conditions of the signals are analyzed and detected through a transient interference detection algorithm;
inquiring the detection results of the clutter detection algorithm and the start transient interference detection algorithm through a start detection algorithm, and judging whether music starts to be played or not according to a level value detection unit and a signal jump detection unit;
after the music is detected to start playing, whether the music playing is finished or not is judged through a finishing detection algorithm.
Specifically, the analyzing and judging the clutter signal condition of the signal by the clutter detection algorithm specifically comprises:
and analyzing the extreme value and the average value of the signal, obtaining an extreme value by comparing the sizes of the signal data before and after the signal data is obtained in a fixed period, obtaining an average value by accumulating the signal data and counting, and detecting the clutter signal condition of the signal according to the extreme value and the average value of the signal.
Specifically, the analyzing the transient interference condition of the signal by starting the transient interference detection algorithm of the present invention specifically includes:
and analyzing the extreme value and the frequency of the signal, obtaining the extreme value by comparing the magnitude of the signal data before and after the signal data is analyzed in a fixed period, calculating the frequency according to the time point of the occurrence of the extreme value, and further detecting and judging the instantaneous interference state of the signal according to the extreme value and the frequency of the signal.
Specifically, the determining whether music starts to be played according to the level value detecting unit and the signal jump detecting unit includes:
the level value detection unit compares the data of the sampling signal with a threshold value, and counts when the data exceeds the threshold value; the signal jump detection unit records the signal data before and after the signal jump detection unit and calculates the slope by combining time; whether the music starts to play is further judged through counting and slope.
Specifically, the determining whether music is over or not by using an end detection algorithm after detecting that music starts playing further includes:
judging whether the music is finished or not according to the level value detection unit and the signal jump detection unit; or whether the music is finished is determined by the difference of the signal data time points.
A music start and end detection system for use with a music fountain, comprising:
the acquisition module is used for acquiring signals of the music channel;
a clutter detection module for analyzing and detecting a clutter signal condition of the signal;
a starting instant interference detection module for analyzing and detecting the instant interference condition of the signal;
the music starting detection module is used for inquiring the detection results of the clutter detection module and the starting instant interference detection module and judging whether music starts to be played or not;
and the music end detection module is used for judging whether the music playing is ended or not after the music playing is detected to be started.
Specifically, the clutter detection module of the present invention specifically includes:
and analyzing the extreme value and the average value of the signal, obtaining an extreme value by comparing the sizes of the signal data before and after the signal data is obtained in a fixed period, obtaining an average value by accumulating the signal data and counting, and detecting the clutter signal condition of the signal according to the extreme value and the average value of the signal.
Specifically, the start instant interference detection module of the present invention specifically includes:
and analyzing the extreme value and the frequency of the signal, obtaining the extreme value by comparing the magnitude of the signal data before and after the signal data is analyzed in a fixed period, calculating the frequency according to the time point of the occurrence of the extreme value, and further detecting and judging the instantaneous interference state of the signal according to the extreme value and the frequency of the signal.
Specifically, the music start detection module further comprises a level value detection unit and a signal jump detection unit; the level value detection unit is used for comparing the data of the sampling signal with a threshold value, and counting when the data exceeds the threshold value; the signal jump detection unit is used for recording the signal data before and after the signal data is recorded, and calculating the slope by combining time; the music start detection module further judges whether the music starts to play or not through counting and slope.
The system further comprises a frequency converter for controlling the music fountain water pump, wherein the frequency converter is respectively connected with the acquisition module, the clutter detection module, the starting instant interference detection module, the music starting detection module and the music ending detection module.
Drawings
Embodiments of the invention are further described below with reference to the accompanying drawings, in which:
FIG. 1 is a flow chart of a music start and end detection method of the present invention as applied to a music fountain;
fig. 2 is a program control diagram of a music start and end detection method of the present invention applied to a music fountain;
FIG. 3 is a flow chart of a clutter detection algorithm of the music start and end detection method of the present invention applied to a music fountain;
FIG. 4 is a flow chart of a start transient disturbance detection algorithm of the music start and end detection method of the present invention applied to a music fountain;
FIG. 5 is a flow chart of a start detection algorithm for the music start and end detection method of the present invention applied to a music fountain;
FIG. 6 is a flow chart of an end detection algorithm for the music start and end detection method of the present invention as applied to a music fountain;
fig. 7 is a block diagram of a music start and end detection system of the present invention applied to a music fountain.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
The invention provides a music starting and ending detection method applied to a music fountain, and please refer to fig. 2, which comprises the following specific contents:
(1) in a shutdown state, the frequency converter can sample signals of a music channel all the time, the sampled signals can be zero values or clutter interference existing all the time, and a clutter interference detection algorithm works to detect the clutter interference state of the signals;
(2) under the state that the frequency converter operates and does not play music, the frequency converter still can sample the signal, and clutter interference detection algorithm, instantaneous interference detection algorithm and music begin to detect the algorithm and play a role: the clutter detection algorithm is used for detecting clutter which exists all the time, the instantaneous interference detection algorithm can identify key click interference at the starting moment, and the starting detection algorithm is used for identifying the start of music;
(3) in the state that the frequency converter is running and playing music, once the frequency converter detects the start of music, the three algorithms are not in use, and the detection algorithm is finished.
Referring to fig. 1, the music start and end detection method applied to a music fountain of the present invention specifically includes the following steps:
step S101, before music is played, signals of a music channel are collected, clutter signal conditions of the signals are analyzed and detected through a clutter detection algorithm, and transient interference conditions of the signals are analyzed and detected through a transient interference detection algorithm.
Specifically, referring to fig. 3, the analyzing and determining the clutter signal condition of the signal by the clutter detection algorithm includes: analyzing the extreme value and the average value of the signal so as to judge the condition of the clutter signal; the clutter alarm amplitude can be set, an extreme value is obtained by comparing the sizes of the signal data before and after the signal data is compared in a fixed period, an average value is obtained by accumulating the signal data and counting, and the clutter signal condition of the signal is detected according to the extreme value and the average value of the signal.
Specifically, referring to fig. 4, the analyzing the transient interference condition of the signal by starting the transient interference detection algorithm includes: analyzing the extreme value and the frequency of the signal to judge the instantaneous interference state; obtaining an extreme value by comparing the sizes of signal data before and after the signal data is in a fixed period, calculating the frequency according to the time point of the occurrence of the extreme value, and further detecting and judging the instantaneous interference state of the signal according to the extreme value and the frequency of the signal.
And step S102, inquiring the detection results of the clutter detection algorithm and the start instantaneous interference detection algorithm through the start detection algorithm, and judging whether the music starts to play or not according to the level value detection unit and the signal jump detection unit.
Specifically, referring to fig. 5, the determining whether music starts to be played according to the level value detecting unit and the signal transition detecting unit specifically includes: firstly, inquiring an interference detection result, judging whether music starts to be played or not according to a level value detection module and a signal jump detection module, wherein both a level detection threshold and a jump slope can be set; the level value detection module compares the sampled data with a threshold value, counting is carried out when the sampled data exceeds the threshold value, the signal jump detection module records the previous data and the next data, and the slope is calculated by combining time; whether the music starts to play is further judged through counting and slope.
Step S103, after detecting that the music starts playing, judging whether the music playing is finished or not through a finishing detection algorithm.
Specifically, referring to fig. 6, after detecting that music starts to be played, determining whether music is ended through an ending detection algorithm further includes: judging whether the music is finished or not according to the level value detection unit and the signal jump detection unit; or whether the music is finished is determined by the difference of the signal data time points.
The ending detection algorithm judges whether the music is ended or not according to the level value detection module and the signal jump detection module, and the implementation method is similar to the step S102; in addition, as the progress of music playing progresses, the control frequency data reaches the end point, and the judgment of the ending signal can also be indirectly realized by utilizing the difference of the data time points.
The music starting and ending detection method applied to the music fountain has the characteristics of small calculated amount, high reliability and wide practicability. The method comprises the following specific steps:
(1) for clutter interference which exists all the time, the frequency converter identifies the clutter interference through a clutter detection algorithm before music starts to be played, if the clutter interference is large, an alarm is given, and otherwise the interference influence is considered in the process of starting and ending detection; for the interference at the beginning of the moment, the result is caused by clicking the play key, and the interference is identified by adopting an algorithm for detecting the interference at the beginning of the moment.
(2) For music starting detection, the starting signal can be identified through a music level value detection module and a signal jump detection module by combining an interference detection result; for music end detection, the end signal can be identified through the level value detection module and the signal jump detection module, and the bypass detection effect can be realized by combining the judgment of control data.
Based on the same inventive concept, the embodiment of the present invention further provides a music beginning and ending detection system applied to a music fountain, and since the principle of solving the problem of the system is similar to a music beginning and ending detection method applied to a music fountain, the implementation of the system can be referred to as the implementation of the method.
Referring to fig. 7, a music start and end detection system applied to a music fountain includes:
the acquisition module is used for acquiring signals of the music channel;
a clutter detection module for analyzing and detecting a clutter signal condition of the signal;
a starting instant interference detection module for analyzing and detecting the instant interference condition of the signal;
the music starting detection module is used for inquiring the detection results of the clutter detection module and the starting instant interference detection module and judging whether music starts to be played or not;
and the music end detection module is used for judging whether the music playing is ended or not after the music playing is detected to be started.
Specifically, the clutter detection module of the present invention specifically includes:
and analyzing the extreme value and the average value of the signal, obtaining an extreme value by comparing the sizes of the signal data before and after the signal data is obtained in a fixed period, obtaining an average value by accumulating the signal data and counting, and detecting the clutter signal condition of the signal according to the extreme value and the average value of the signal.
Specifically, the starting instant interference detection module specifically includes:
and analyzing the extreme value and the frequency of the signal, obtaining the extreme value by comparing the magnitude of the signal data before and after the signal data is analyzed in a fixed period, calculating the frequency according to the time point of the occurrence of the extreme value, and further detecting and judging the instantaneous interference state of the signal according to the extreme value and the frequency of the signal.
Specifically, the music start detection module further includes a level value detection unit and a signal transition detection unit. The level value detection unit is used for comparing the data of the sampling signal with a threshold value, and counting when the data exceeds the threshold value; the signal jump detection unit is used for recording the signal data before and after the signal data is recorded, and calculating the slope by combining time; the music start detection module further judges whether the music starts to play or not through counting and slope.
Specifically, the system still includes the converter that is used for controlling music fountain water pump, the converter respectively with collection module, clutter detection module, start disturbance in the twinkling of an eye detection module, music start detection module and music end detection module are connected.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. A music start and end detection method applied to a music fountain is characterized by comprising the following steps:
before music is played, signals of a music channel are collected, clutter signal conditions of the signals are analyzed and detected through a clutter detection algorithm, and transient interference conditions of the signals are analyzed and detected through a transient interference detection algorithm;
the clutter detection algorithm is used for analyzing and judging the clutter signal condition of the signal, and the method specifically comprises the following steps: analyzing the extreme value and the average value of the signal, obtaining an extreme value by comparing the sizes of the signal data before and after the signal data is obtained in a fixed period, obtaining an average value by accumulating the signal data and counting, and detecting the clutter signal condition of the signal according to the extreme value and the average value of the signal;
inquiring the detection results of the clutter detection algorithm and the start transient interference detection algorithm through a start detection algorithm, and judging whether music starts to be played or not according to a level value detection unit and a signal jump detection unit;
after the music is detected to start playing, whether the music playing is finished or not is judged through a finishing detection algorithm.
2. The method of claim 1, wherein analyzing the transient interference condition of the signal by a transient interference detection algorithm comprises:
and analyzing the extreme value and the frequency of the signal, obtaining the extreme value by comparing the magnitude of the signal data before and after the signal data is analyzed in a fixed period, calculating the frequency according to the time point of the occurrence of the extreme value, and further detecting and judging the instantaneous interference state of the signal according to the extreme value and the frequency of the signal.
3. The method of claim 1, wherein the determining whether music starts to be played according to the level value detecting unit and the signal transition detecting unit comprises:
the level value detection unit compares the data of the sampling signal with a threshold value, and counts when the data exceeds the threshold value; the signal jump detection unit records the signal data before and after the signal jump detection unit and calculates the slope by combining time; whether the music starts to play is further judged through counting and slope.
4. The method of claim 1, wherein the determining whether the music is over by an end detection algorithm after detecting that the music starts playing, further comprises:
judging whether the music is finished or not according to the level value detection unit and the signal jump detection unit; or whether the music is finished is determined by the difference of the signal data time points.
5. A music start and end detection system for use with a music fountain, comprising:
the acquisition module is used for acquiring signals of the music channel;
a clutter detection module for analyzing and detecting a clutter signal condition of the signal; the clutter detection module specifically includes: analyzing the extreme value and the average value of the signal, obtaining an extreme value by comparing the sizes of the signal data before and after the signal data is obtained in a fixed period, obtaining an average value by accumulating the signal data and counting, and detecting the clutter signal condition of the signal according to the extreme value and the average value of the signal;
a starting instant interference detection module for analyzing and detecting the instant interference condition of the signal;
the music starting detection module is used for inquiring the detection results of the clutter detection module and the starting instant interference detection module and judging whether music starts to be played or not;
and the music end detection module is used for judging whether the music playing is ended or not after the music playing is detected to be started.
6. The system of claim 5, wherein the transient disturbance module comprises:
and analyzing the extreme value and the frequency of the signal, obtaining the extreme value by comparing the magnitude of the signal data before and after the signal data is analyzed in a fixed period, calculating the frequency according to the time point of the occurrence of the extreme value, and further detecting and judging the instantaneous interference state of the signal according to the extreme value and the frequency of the signal.
7. The music start and end detection system applied to a music fountain of claim 5, wherein the music start detection block further comprises a level value detection unit and a signal transition detection unit; the level value detection unit is used for comparing the data of the sampling signal with a threshold value, and counting when the data exceeds the threshold value; the signal jump detection unit is used for recording the signal data before and after the signal data is recorded, and calculating the slope by combining time; the music start detection module further judges whether the music starts to play or not through counting and slope.
8. The system of any one of claims 5 to 7, further comprising a transducer for controlling a pump of the music fountain, the transducer being connected to the collection module, the clutter detection module, the start glitch detection module, the music start detection module, and the music end detection module, respectively.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5170359A (en) * | 1984-07-19 | 1992-12-08 | Presearch Incorporated | Transient episode detector method and apparatus |
| US8170875B2 (en) * | 2005-06-15 | 2012-05-01 | Qnx Software Systems Limited | Speech end-pointer |
| US8311819B2 (en) * | 2005-06-15 | 2012-11-13 | Qnx Software Systems Limited | System for detecting speech with background voice estimates and noise estimates |
| CN101625857B (en) * | 2008-07-10 | 2012-05-09 | 新奥特（北京）视频技术有限公司 | Self-adaptive voice endpoint detection method |
| US9099098B2 (en) * | 2012-01-20 | 2015-08-04 | Qualcomm Incorporated | Voice activity detection in presence of background noise |
| CN103440871B (en) * | 2013-08-21 | 2016-04-13 | 大连理工大学 | A kind of method that in voice, transient noise suppresses |
| KR102409536B1 (en) * | 2015-08-07 | 2022-06-17 | 시러스 로직 인터내셔널 세미컨덕터 리미티드 | Event detection for playback management on audio devices |
| CN106332378B (en) * | 2016-11-26 | 2018-12-25 | 湖南人文科技学院 | Intelligent LED running lamp and its control method based on music rhythm identification |
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