Music rhythm detection method based on frequency domain and time domain and storage medium
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A detection method and rhythm technology, applied in speech analysis, instruments, etc., can solve the problems of false detection, unreachable, and missed detection of rhythm points, and achieve the effect of avoiding false detection and missed detection and improving accuracy
Active Publication Date: 2020-04-28
FUJIAN STAR NET EVIDEO INFORMATION SYST CO LTD
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[0002] At present, the detection of music rhythm is still in the frequency domain, which leads to false detection and missed detection of rhythm points in some songs
[0003] For example, the individual drumbeats of some songs show obvious energy jump peaks in the time domain, but only a small energy jump peak at the same time in the low frequency range of the frequency domain. If the rhythm is only detected based on the frequency domain conditions point, the peak cannot reach the rhythm detection threshold of the frequency band in the frequency domain, and will be excluded from the rhythm point of the song, thus being missed.
Another example is that some songs show obvious energy jumps at individual time points in a certain frequency band in the frequency domain, which are considered rhythm points, but the energy jumps at the same moment in the time domain are extremely calm, and cannot be heard at all. Meet the requirements of the rhythm threshold, then there will be false detections
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Embodiment 1
[0068] Please refer to figure 2 , The first embodiment of the present invention is: a music rhythm detection method based on frequency domain and time domain, which can be applied to light control and object control, including the following steps:
[0069] S1: Acquire audio data of music.
[0070] S2: Framing the time domain signal of the audio data, and analyze the short-term energy of each frame to obtain the time-domain energy mutation point; that is, analyze the short-term energy change of the audio data in the time domain, and find the The energy mutation point, specifically, includes the following steps:
[0071] S201: Framing the time domain signal of the audio data according to the preset frame length and frame shift. The short-term energy refers to the energy in a short period of time, and the short period of time usually refers to one frame, that is, the energy in one frame period is the short-term energy. Therefore, in order to analyze the change of the short-term ener...
Embodiment 2
[0117] This embodiment is a computer-readable storage medium corresponding to the above-mentioned embodiment, on which a computer program is stored, and when the program is executed by a processor, the following steps are implemented:
[0118] Acquire audio data of music;
[0119] Framing the time-domain signal of the audio data, and analyzing the short-term energy of each frame to obtain the time-domain energy mutation point;
[0120] Dividing the audio data according to a preset frequency range to obtain a first frequency band group, and obtaining energy mutation points of each frequency band in the first frequency band group, respectively, to obtain the first frequency domain energy mutation points;
[0121] According to the frequency range corresponding to the human voice and / or each musical instrument, the audio data is divided to obtain a second frequency band group, and the energy mutation points of each frequency band in the second frequency band group are respectively obtained...
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Abstract
The invention discloses a music rhythm detection method based on a frequency domain and a time domain and a storage medium. The method comprises the following steps: acquiring audio data of music, framing a time domain signal of the audio data, analyzing the short-time energy of each frame to obtain a time domain energy mutation point, dividing the audio data according to a preset frequency rangeto obtain a first frequency band group, respectively obtaining an energy mutation point of each frequency band in the first frequency band group to obtain a first frequency domain energy mutation point, dividing the audio data according to the human voice and / or the frequency range corresponding to each musical instrument to obtain a second frequency band group, respectively obtaining an energy mutation point of each frequency band in the second frequency band group to obtain a second frequency domain energy mutation point, and analyzing to obtain a rhythm point according to the time domain energy mutation point, the first frequency domain energy mutation point and the second frequency domain energy mutation point. According to the invention, false detection and missing detection can be avoided, and the accuracy of music rhythm point detection is improved.
Description
Technical field [0001] The present invention relates to the technical field of audio data processing, in particular to a music rhythm detection method and storage medium based on frequency domain and time domain. Background technique [0002] At present, the detection of music rhythm still stays in the frequency domain, which leads to misdetection and missed detection of rhythm points of some songs. [0003] For example, the individual drum beats of some songs show obvious energy jump peaks in the time domain, but there are only small energy jump peaks at the same moment in the low frequency range of the frequency domain. If the rhythm is detected only according to the frequency domain conditions If the peak value cannot reach the rhythm detection threshold of the frequency band in the frequency domain, it will be excluded from the rhythm point of the song and thus missed. For example, some songs show obvious energy jumps at individual time points in a certain frequency band in th...
Claims
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Patent Type & Authority Applications(China)
IPC IPC(8): G10L25/03G10L25/18G10L25/51
CPCG10L25/03G10L25/18G10L25/51
Inventor 蔡智力
Owner FUJIAN STAR NET EVIDEO INFORMATION SYST CO LTD
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