CN108062217B - Method for intelligently identifying sound source input, music playing device and control method thereof - Google Patents
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Abstract
The invention discloses a method for intelligently identifying sound source input, a music playing device and a control method thereof, wherein the method for intelligently identifying the sound source input comprises the following steps: continuously collecting signal data input by each sound source input channel; analyzing the collected signal data at intervals of a preset time period, counting waveforms of which the waveform amplitudes are larger than a set threshold value in the signal data and calculating the frequency, if a plurality of waveforms of which the frequencies are in a preset interval and the waveform amplitudes are larger than the set threshold value exist in the preset time period, judging that the corresponding sound source input channel has signal input, and otherwise, judging that the corresponding sound source input channel has no signal input. The method of the invention can realize automatic recognition of sound source input; the music playing device can automatically identify the input of the sound source, and can automatically switch to the corresponding sound source, so that a user can use the music playing device more conveniently and intelligently.
Description
Technical Field
The present invention relates to the field of music playing technologies, and in particular, to a method for intelligently identifying an input of a sound source, a music playing apparatus, and a control method thereof.
Background
At present, the working principle of a power amplifier and background music used in a household is that an audio signal is transmitted from a sound source to a power amplifier, then the audio signal is amplified by the power amplifier and is sounded by a loudspeaker. The sound source is generally divided into a digital sound source and an analog sound source. The household power amplifier and the background music host generally have a plurality of paths of digital sound sources and a plurality of paths of analog sound source inputs.
When external sound source equipment such as a television, a DVD and the like is turned on, the existing power amplifier cannot intelligently identify sound source input, so that the sound source of the power amplifier needs to be manually switched, and the existing power amplifier is very inconvenient.
Disclosure of Invention
The invention provides a method for intelligently identifying sound source input, a music playing device and a control method thereof, and aims to solve the technical problem that the sound source input cannot be automatically identified in the prior art.
The technical scheme adopted by the invention is as follows:
in one aspect, the present invention provides a method for intelligently identifying audio source input, comprising the following steps: continuously collecting signal data input by each sound source input channel; analyzing the collected signal data at intervals of a preset time period, counting waveforms of which the waveform amplitudes are larger than a set threshold value in the signal data and calculating the frequency, if a plurality of waveforms of which the frequencies are in a preset interval and the waveform amplitudes are larger than the set threshold value exist in the preset time period, judging that the corresponding sound source input channel has signal input, and otherwise, judging that the corresponding sound source input channel has no signal input.
According to another aspect of the present invention, there is also provided a music playback apparatus that intelligently recognizes an audio source input, the apparatus including: the more than two acquisition modules are respectively connected to the more than two sound source input channels of the sound source selection module and are used for continuously acquiring signal data input by the corresponding sound source input channels; the processing control module is connected with the acquisition module and used for receiving the signal data and analyzing the acquired signal data at intervals of a preset time period, the processing control module is used for counting waveforms of which waveform amplitudes are larger than a set threshold value in the signal data and calculating frequency, if a plurality of waveforms of which the frequency is in a preset interval and the waveform amplitudes are larger than the set threshold value exist in the preset time period, the corresponding sound source input channel is judged to have signal input, and if not, the corresponding sound source input channel is judged to have no signal input; and the sound source selection module is provided with a plurality of sound source input channels, is also connected with the processing control module and is used for switching the sound source to the sound source input channel with signal input under the control of the processing control module and sending the sound source signal input by the sound source input channel to the power amplifier.
Further, the processing control module is further configured to control the sound source selection module to switch to the sound source input channel with the highest priority level according to a preset priority level when detecting that the plurality of sound source input channels all have signal inputs at the same time.
Further, the processing control module is further configured to control the sound source selection module to switch to the sound source input channel with the signal input when detecting that the sound source input channel currently in use has no signal input for a plurality of consecutive times.
Furthermore, the music playing device capable of intelligently identifying the sound source input also comprises a power amplifier and a loudspeaker, wherein the power amplifier is respectively and electrically connected with the processing control module and the sound source selection module, and the loudspeaker is connected with the power amplifier, and the power amplifier is used for amplifying the received signals and pushing the loudspeaker to work; the processing control module is also used for controlling the power amplifier to be turned on when detecting that at least one sound source input channel has signal input, and controlling the power amplifier to be turned off when detecting that all sound source input channels have no signal input continuously for multiple times.
Further, the audio source input channels comprise a plurality of analog audio input channels; the acquisition modules are AD acquisition modules, and each AD acquisition module is respectively connected with one of the analog audio input channels and the processing control module and is used for acquiring analog audio signals input by the corresponding analog audio input channel and sending the analog audio signals to the processing control module.
Furthermore, the music playing device also comprises a network module connected with the processing control module, and a DA conversion module connected between the processing control module and one of the analog audio input channels of the sound source selection module, wherein the network module is used for acquiring a network sound source from the cloud server and sending the network sound source to the processing control module; the processing control module is used for receiving the network sound source and decoding the network sound source into a PCM data stream; the DA conversion module is used for receiving the data decoded by the processing control module, converting the data into an analog signal and sending the analog signal to the sound source selection module.
According to another aspect of the present invention, there is also provided a control method applied to the above music playing apparatus for intelligently recognizing an audio source input, including: the acquisition module continuously acquires signal data input by each sound source input channel; the processing control module receives the signal data acquired by the acquisition module, analyzes the acquired signal data at intervals of a preset time period, counts waveforms of which waveform amplitudes are larger than a set threshold value in the signal data and calculates frequency, if a plurality of waveforms of which the frequency is in a preset interval and the waveform amplitudes are larger than the set threshold value exist in the preset time period, the corresponding sound source input channel is judged to have signal input, and if not, the corresponding sound source input channel is judged to have no signal input; the processing control module controls the sound source selection module to switch the sound source to a sound source input channel with signal input and controls the power amplifier to be opened; and the sound source selection module sends the sound source signal input by the sound source input channel to the power amplifier for playing.
Further, the control method further includes: when detecting that the plurality of sound source input channels simultaneously have signal input, the processing control module controls the sound source selection module to switch to the sound source input channel with the highest priority level according to the preset priority level.
Further, the control method further includes: when the processing control module continuously detects that no signal is input into the currently used sound source input channel for multiple times, the processing control module controls the sound source selection module to be switched to the sound source input channel with the signal input; and the processing control module controls the power amplifier to be closed when detecting that all the sound source input channels have no signal input continuously for multiple times.
According to the invention, signal input of each sound source input channel is continuously collected, the collected signal data is analyzed at intervals of a preset time period, the waveforms of which the waveform amplitudes are larger than a set threshold value in the signal data are counted and the frequency is calculated, if a plurality of waveforms of which the frequencies are in a preset interval and the waveform amplitudes are larger than the set threshold value exist in the preset time period, the corresponding sound source input channel is judged to have signal input, otherwise, the corresponding sound source input channel is judged to have no signal input, and the sound source input can be automatically identified; the music playing device can automatically identify the input of the sound source, and can automatically switch to the corresponding sound source, so that a user can use the music playing device more conveniently and intelligently.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method for intelligently identifying audio source inputs in accordance with a preferred embodiment of the present invention;
fig. 2 is a block diagram of a music player apparatus for intelligently recognizing an audio source input according to a preferred embodiment of the present invention.
The reference numbers illustrate:
100. an acquisition module; 200. a sound source selection module; 300. a processing control module; 400. a power amplifier; 500. a speaker; 600. a network module; 700. a DA conversion module; 800. and a cloud server.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a preferred embodiment of the present invention provides a method for intelligently recognizing an audio source input, including the steps of:
step S100, continuously collecting signal data input by each sound source input channel;
step S200, analyzing the collected signal data at intervals of a preset time period, counting waveforms of which waveform amplitudes are larger than a set threshold value in the signal data and calculating frequency, if a plurality of waveforms of which the frequency is in a preset interval and the waveform amplitudes are larger than the set threshold value exist in the preset time period, judging that the corresponding sound source input channel has signal input, and otherwise, judging that the corresponding sound source input channel has no signal input.
According to the method for intelligently identifying the sound source input, the signal input of each sound source input channel is continuously collected, the collected signal data is analyzed at intervals of a preset time period, the waveforms with the waveform amplitude values larger than a set threshold value in the signal data are counted and the frequency is calculated, the corresponding sound source input channel is judged to have no signal input according to the counting and frequency calculating result, and the sound source input can be automatically identified.
Referring to fig. 2, according to another aspect of the present invention, there is also provided a music playback apparatus that intelligently recognizes an audio source input, the apparatus including: more than two acquisition modules 100, respectively connected to more than two sound source input channels of the sound source selection module 200, for continuously acquiring signal data input by the corresponding sound source input channels; the processing control module 300 is connected to the acquisition module 100, and is configured to receive the signal data and analyze the acquired signal data at intervals of a preset time period, the processing control module 300 is configured to count waveforms of which waveform amplitudes are greater than a set threshold in the signal data and calculate frequencies, and if a plurality of waveforms of which frequencies are in a preset interval and waveform amplitudes are greater than the set threshold exist in the preset time period, it is determined that a signal is input to the corresponding sound source input channel, otherwise, it is determined that no signal is input to the corresponding sound source input channel; the audio source selection module 200 has a plurality of audio source input channels, and the audio source selection module 200 is further connected to the processing control module 300, and is configured to switch an audio source to the audio source input channel having a signal input under the control of the processing control module 300, and send an audio source signal input by the audio source input channel to the power amplifier 400. The music playing device can automatically identify the input of the sound source, and can automatically switch to the corresponding sound source, so that a user can use the music playing device more conveniently and intelligently.
Further, the processing control module 300 is further configured to control the sound source selection module 200 to switch to the sound source input channel with the highest priority level according to a preset priority level when detecting that the plurality of sound source input channels all have signal inputs at the same time.
Further, the processing control module 300 is further configured to control the sound source selection module 200 to switch to the sound source input channel with the signal input when detecting that there is no signal input in the currently used sound source input channel for a plurality of consecutive times.
Further, the music playing device of the present invention further includes a power amplifier 400 electrically connected to the processing control module 300 and the sound source selection module 200, respectively, and a speaker 500 connected to the power amplifier 400. The power amplifier 400 is used to amplify the received signal and drive the speaker 500 to operate. The processing control module 300 is further configured to control the power amplifier 400 to be turned on when detecting that at least one audio source input channel has a signal input, and to control the power amplifier 400 to be turned off when detecting that all audio source input channels have no signal input consecutively a plurality of times.
Further, the audio source input channels include a plurality of analog audio input channels. The audio source selection module 200 of the present invention can use a dedicated audio source switching chip, such as PT2314 series, or NPCA110X series. In the preferred embodiment, the audio source selection module 200 has three audio source input channels, which are analog audio input channels. The first audio input channel AUX1 is used to connect to a television, the second audio input channel AUX2 is used to connect to a DVD, and the third audio input channel is used to input a network audio source.
Further, the acquisition module 100 is an AD acquisition module, and each AD acquisition module is connected to one of the analog audio input channels and the processing control module 300, and is configured to acquire an analog audio signal input by the corresponding analog audio input channel and send the analog audio signal to the processing control module 300. In the preferred embodiment, the acquisition module 100 includes two AD acquisition modules, which are respectively connected to the first audio source input channel AUX1 and the second audio source input channel AUX2, and are configured to acquire analog audio signals on the two audio source input channels and send the analog audio signals to the processing control module 300.
Further, the music playing device further includes a network module 600 connected to the processing control module 300, and a DA conversion module 700 connected between the processing control module 300 and one of the analog audio input channels of the audio source selection module 200, where the network module 600 is configured to obtain a network audio source from the cloud server 800 and send the network audio source to the processing control module 300; the processing control module 300 is used for receiving a network sound source and decoding the network sound source into a PCM data stream; the DA conversion module 700 is configured to receive the data decoded by the processing control module 300, convert the data into an analog signal, and send the analog signal to the sound source selection module 200. In this embodiment, the data flow of the network sound source is as follows: 1. the user can manually control the switching to the network sound source or set the timing strategy to switch to the network sound source. 2. The processing control module 300 controls the audio source selection module 200 to switch audio sources. 3. The processing control module 300 obtains song data from the cloud server 800 through the network module 600, and decodes the song data into a PCM data stream. 4. Is output as an analog signal to the power amplifier 400 through the DA conversion module 700.
According to another aspect of the present invention, there is also provided a control method applied to the above music playing apparatus for intelligently identifying an audio source input, including the steps of:
the acquisition module 100 continuously acquires signal data input by each sound source input channel;
the processing control module 300 receives the signal data acquired by the acquisition module 100, analyzes the acquired signal data at intervals of a preset time period, counts waveforms of which waveform amplitudes are greater than a set threshold value in the signal data, calculates frequencies, determines that a signal is input to a corresponding sound source input channel if a plurality of waveforms of which the frequencies are in a preset interval and the waveform amplitudes are greater than the set threshold value exist in the preset time period, and otherwise determines that no signal is input to the corresponding sound source input channel;
the processing control module 300 controls the sound source selection module 200 to switch the sound source to the sound source input channel with signal input, and controls the power amplifier 400 to be turned on; the sound source selection module 200 sends the sound source signal inputted from the sound source input channel to the power amplifier 400 for playing.
Further, the control method further includes: when detecting that signals are input to a plurality of sound source input channels simultaneously, the processing control module 300 controls the sound source selection module 200 to switch to the sound source input channel with the highest priority level according to the preset priority level.
Further, the control method further includes: the processing control module 300 controls the sound source selection module 200 to switch to the sound source input channel with signal input when detecting that there is no signal input in the currently used sound source input channel for a plurality of consecutive times. Further, the processing control module 300 controls the power amplifier 400 to turn off when it detects that no signal is input to all audio source input channels for a plurality of consecutive times. In this embodiment, the processing control module 300 determines whether a signal is input in the corresponding audio input channel according to the audio characteristics detected by the AD acquisition module 100 corresponding to the AUX1 and AUX2 analog audio channels; for the network sound source, the processing control module 300 determines whether there is sound source data input in the channel connected to the network module 600, so as to determine whether there is signal input in each sound source input channel.
A specific embodiment of a control method in a music playback apparatus that intelligently recognizes audio source input is given below.
The step of acquiring the signal by the acquisition module 100 includes: firstly, carrying out voltage reduction processing on an external audio signal; the AD acquisition module continuously acquires the signals after voltage reduction at a sampling rate of 44.1 KHz.
The process control module 300 analyzes the collected signal data every 500ms interval. According to the practical application condition, considering the factors of external interference and noise, an amplitude threshold value is set for the signal data. For example, the maximum amplitude of the sound source is 3V, and a threshold value of 0.2V may be set as a detection criterion. The processing control module 300 counts the waveforms greater than the threshold and calculates the frequency, and if there are a plurality of waveforms with frequencies between 20 and 20 khz and waveform amplitudes greater than the threshold within the interval time period of 500ms, it determines that the corresponding sound source input channel has signal input, otherwise, it determines that the corresponding sound source input channel has no signal input.
The processing control module 300 controls the audio source selection module 200 to switch the audio source to the audio source input channel having the signal input, and simultaneously turns on the power amplifier 400. If there are several sound source inputs, then according to the priority set by user, selecting sound source input channel. For example, the user may set the priority as follows: first sound source input channel AUX1 (TV) > second sound source input channel AUX2(DVD) > third sound source input channel (network sound source), when the TV and DVD are turned on simultaneously, the sound source will be switched to first sound source input channel AUX1 (TV) automatically, and the power amplifier 400 will play the sound source of TV automatically.
When the processing control module 300 detects that there is no input signal in the currently used sound source for 10 consecutive times, it automatically switches to the sound source with input through the sound source selection module 200.
When all the audio sources have no signal input, the process control module 300 controls the power amplifier 400 to be turned off.
The invention can realize automatic identification of the external sound source equipment started by the user, automatically switch the power amplifier 400 to the corresponding sound source, and is more convenient and intelligent in the using process of the user.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for intelligently identifying audio source input is characterized by comprising the following steps:
continuously collecting signal data input by each sound source input channel;
analyzing the acquired signal data at intervals of a preset time period, counting waveforms of which waveform amplitudes are larger than a set threshold value in the signal data and calculating frequency, if a plurality of waveforms of which the frequency is in a preset interval and the waveform amplitudes are larger than the set threshold value exist in the preset time period, judging that the corresponding sound source input channel has signal input, and otherwise, judging that the corresponding sound source input channel has no signal input.
2. A music player capable of intelligently identifying audio source input is characterized by comprising:
more than two acquisition modules (100) which are respectively connected to more than two sound source input channels of the sound source selection module (200) and are used for continuously acquiring signal data input by the corresponding sound source input channels;
the processing control module (300) is connected with the acquisition module (100) and used for receiving the signal data and analyzing the acquired signal data at intervals of a preset time period, the processing control module (300) is used for counting waveforms of which waveform amplitudes are larger than a set threshold value in the signal data and calculating frequency, if a plurality of waveforms of which the frequency is in a preset interval and the waveform amplitudes are larger than the set threshold value exist in the preset time period, the corresponding sound source input channel is judged to have signal input, and if not, the corresponding sound source input channel is judged to have no signal input;
the sound source selection module (200) is provided with a plurality of sound source input channels, the sound source selection module (200) is also connected with the processing control module (300) and used for switching a sound source to the sound source input channel with signal input under the control of the processing control module (300) and sending a sound source signal input by the sound source input channel to the power amplifier (400).
3. The music player capable of intelligently recognizing audio source input according to claim 2,
the processing control module (300) is further configured to control the sound source selection module (200) to switch to the sound source input channel with the highest priority level according to a preset priority level when detecting that the plurality of sound source input channels have signal inputs at the same time.
4. The music player capable of intelligently recognizing audio source input according to claim 2,
the processing control module (300) is further used for controlling the sound source selection module (200) to switch to the sound source input channel with signal input when detecting that the currently used sound source input channel has no signal input for a plurality of times.
5. The music player with intelligent identification of audio input of claim 2, further comprising a power amplifier (400) electrically connected to the processing control module (300) and the audio selection module (200), respectively, and a speaker (500) connected to the power amplifier (400),
the power amplifier (400) is used for amplifying the received signal and pushing the loudspeaker (500) to work;
the processing control module (300) is further used for controlling the power amplifier (400) to be turned on when detecting that at least one audio source input channel has signal input, and controlling the power amplifier (400) to be turned off when detecting that all audio source input channels have no signal input for a plurality of times.
6. The music player capable of intelligently recognizing audio source input according to claim 2,
the audio source input channels comprise a plurality of analog audio input channels;
the acquisition module (100) is an AD acquisition module, each AD acquisition module is respectively connected with one of the analog audio input channels and the processing control module (300) and is used for acquiring corresponding analog audio signals input by the analog audio input channels and sending the analog audio signals to the processing control module (300).
7. The music player with intelligent recognition of audio source input according to claim 6, further comprising a network module (600) connected to the processing control module (300), a DA conversion module (700) connected between the processing control module (300) and one of the analog audio input channels of the audio source selection module (200),
the network module (600) is used for acquiring a network sound source from a cloud server (800) and sending the network sound source to the processing control module (300);
the processing control module (300) is used for receiving the network sound source and decoding the network sound source into a PCM data stream;
the DA conversion module (700) is used for receiving the data decoded by the processing control module (300), converting the data into an analog signal and sending the analog signal to the sound source selection module (200).
8. A control method applied to a music player apparatus for intelligently recognizing an audio source input according to any one of claims 2 to 7, comprising:
the acquisition module (100) continuously acquires signal data input by each sound source input channel;
the processing control module (300) receives the signal data acquired by the acquisition module (100), analyzes the acquired signal data at intervals of a preset time period, counts waveforms of which waveform amplitudes are larger than a set threshold value in the signal data and calculates frequencies, and if a plurality of waveforms of which the frequencies are in a preset interval and the waveform amplitudes are larger than the set threshold value exist in the preset time period, determines that the corresponding sound source input channel has signal input, otherwise determines that the corresponding sound source input channel has no signal input;
the processing control module (300) controls the sound source selection module (200) to switch a sound source to a sound source input channel with signal input and controls the power amplifier (400) to be turned on;
and the sound source selection module (200) sends the sound source signal input by the sound source input channel to the power amplifier (400) for playing.
9. The control method according to claim 8, characterized in that the method further comprises:
when detecting that signals are input into a plurality of sound source input channels simultaneously, the processing control module (300) controls the sound source selection module (200) to switch to the sound source input channel with the highest priority level according to the preset priority level.
10. The control method according to claim 8, characterized in that the method further comprises:
when detecting that no signal is input into a currently used sound source input channel for a plurality of times, the processing control module (300) controls the sound source selection module (200) to switch to the sound source input channel with the signal input;
the processing control module (300) controls the power amplifier (400) to be closed when detecting that all the audio source input channels have no signal input for a plurality of times.
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| CN102467363A (en) * | 2010-11-11 | 2012-05-23 | 霍尼韦尔国际公司 | Supervisory method and apparatus for audio input path |
| CN106802781A (en) * | 2016-12-23 | 2017-06-06 | 杭州电子科技大学 | A kind of multi-channel sound signal acquiring system based on ARM |
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| CN102467363A (en) * | 2010-11-11 | 2012-05-23 | 霍尼韦尔国际公司 | Supervisory method and apparatus for audio input path |
| CN106802781A (en) * | 2016-12-23 | 2017-06-06 | 杭州电子科技大学 | A kind of multi-channel sound signal acquiring system based on ARM |
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