CN116132877A - Sound system and control method thereof - Google Patents
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- CN116132877A CN116132877A CN202211670934.7A CN202211670934A CN116132877A CN 116132877 A CN116132877 A CN 116132877A CN 202211670934 A CN202211670934 A CN 202211670934A CN 116132877 A CN116132877 A CN 116132877A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0035—Synchronisation arrangements detecting errors in frequency or phase
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
A sound system and a control method thereof. The system comprises: the device comprises an audio data analysis unit, more than two digital power amplification units and more than two playing units, wherein the digital power amplification units are in one-to-one correspondence with the playing units; wherein: the audio data analysis unit is suitable for carrying out digital frequency division on the audio input signal to obtain audio data with more than two different frequency bands, and respectively sending the obtained audio data to the corresponding digital power amplification unit; the digital power amplifying unit is suitable for receiving corresponding audio data, amplifying power, recovering an analog audio signal corresponding to the audio data of the received frequency band, and outputting the analog audio signal to the corresponding playing unit; the playing unit is suitable for sounding under the drive of the analog audio signal. By adopting the scheme, the cost of the sound system can be reduced.
Description
Technical Field
The invention relates to the technical field of audio signal processing, in particular to a sound system and a control method thereof.
Background
High fidelity sound systems, i.e. combinations of devices that perfectly reproduce the original sound, output sound typically has no or little distortion.
However, existing sound systems are costly.
Disclosure of Invention
The invention aims to solve the problems that: how to reduce the cost of the sound system.
To solve the above problems, an embodiment of the present invention provides an acoustic system, including: the device comprises an audio data analysis unit, more than two digital power amplification units and more than two playing units, wherein the digital power amplification units are in one-to-one correspondence with the playing units; wherein:
the audio data analysis unit is suitable for carrying out digital frequency division on the audio input signal to obtain audio data with more than two different frequency bands, and respectively sending the obtained audio data to the corresponding digital power amplification unit;
the digital power amplifying unit is suitable for receiving corresponding audio data, amplifying power, recovering an analog audio signal corresponding to the audio data of the received frequency band, and outputting the analog audio signal to the corresponding playing unit;
the playing unit is suitable for sounding under the drive of the analog audio signal.
Optionally, the audio data of the two or more different frequency bands includes: high-pitched part audio data, medium-pitched part audio data, and low-pitched part audio data;
the two or more digital power amplifying units include: a high-pitch digital power amplifying unit, a medium-pitch digital power amplifying unit and a low-pitch digital power amplifying unit;
the playback unit includes: a high-pitch playing unit, a medium-pitch playing unit and a low-pitch playing unit.
Optionally, the audio data parsing unit includes:
the low-power consumption audio transmission module is suitable for carrying out low-power consumption Bluetooth encapsulation on the audio data with more than two different frequency bands to form a low-power consumption Bluetooth audio data packet and transmitting the low-power consumption Bluetooth audio data packet to the corresponding digital power amplification unit.
Optionally, the digital power amplifying unit includes:
the Bluetooth receiving module is suitable for receiving the low-power Bluetooth audio data packet and extracting audio data of the sound section; and the power amplification module is suitable for carrying out power amplification on the audio data extracted by the Bluetooth receiving module and recovering corresponding analog audio signals.
Optionally, the amplification power of the digital power amplification module is greater than 300W.
Optionally, the two or more playing units are respectively located at different spatial positions.
Optionally, the playing unit includes at least one speaker.
The embodiment of the invention also provides a control method of the sound system, which comprises the following steps: the device comprises an audio data analysis unit, more than two digital power amplification units and more than two playing units, wherein the digital power amplification units are in one-to-one correspondence with the playing units; the method comprises the following steps:
when an audio input signal is received, the audio data analyzing unit carries out digital analysis on the audio input signal to obtain audio data of more than two different sound segments, and the obtained audio data are respectively sent to corresponding digital power amplifying units;
the digital power amplifying unit receives the corresponding audio data, amplifies the power, restores the analog audio signal corresponding to the audio data of the received frequency band and outputs the analog audio signal to the corresponding playing unit;
sounding by the playing unit under the drive of the analog audio signal.
Optionally, the sending the obtained audio data to corresponding digital power amplifying units respectively includes:
and carrying out low-power Bluetooth packaging on the audio data of more than two different sound segments to form a low-power Bluetooth audio data packet, and sending the low-power Bluetooth audio data packet to the corresponding digital power amplifying unit.
Optionally, the receiving, by the digital power amplifying unit, the corresponding audio data includes:
and the digital power amplification unit receives the low-power consumption Bluetooth audio data packet and extracts audio data of the frequency band.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following advantages:
by adopting the scheme of the invention, the digital power amplifying unit is adopted to amplify the audio data, and compared with the analog power amplifier, the cost of the sound system can be reduced. In addition, the audio data analysis unit can carry out digital frequency division on the audio input signal to obtain more than two audio data with different frequency bands, and each digital power amplification unit only amplifies the received audio data instead of amplifying the audio data with the full frequency band, so that even if the power of the digital power amplification unit is increased, noise introduction can be reduced as much as possible, and the fidelity effect of the sound system is improved. Therefore, the scheme of the invention can give consideration to cost and fidelity effect.
Further, the audio data analysis unit comprises a low-power-consumption audio transmission module, and the audio data of more than two different frequency bands are transmitted to the corresponding digital power amplification unit through the low-power-consumption audio transmission module. The low-power-consumption audio transmission module belongs to one of wireless connection, and audio data is transmitted through the low-power-consumption audio transmission module, so that connection between an audio data analysis unit and a digital power amplification unit can be simplified, and system complexity is reduced. In addition, compared with other wireless connection modes (such as WIFI), in the low-power-consumption audio transmission process, the two transmission parties keep a handshake state, so that the transmission has real-time directivity, and the transmission process is more stable. In addition, the low-power consumption audio sending module can provide higher bandwidth and has transmission characteristics of intra-group broadcasting, so that when sending audio data, more than two audio data with different frequency bands can be synchronously sent to all digital power amplifying units, the synchronism of audio data transmission is ensured, synchronous sounding of each playing unit is facilitated, and the fidelity effect is further improved.
Drawings
FIG. 1 is a schematic diagram of an audio system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a digital power amplifying unit according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of an audio system according to an embodiment of the present invention.
Detailed Description
In the existing sound system, if high fidelity is to be realized, analog filtering is usually performed on an audio input signal, and then three analog power amplifiers are used for respectively driving speakers in a voice domain to sound. The speakers of different ranges need to be provided with different analog power amplifier structures to realize driving, so that the overall cost of the sound system is high.
Therefore, it is difficult to achieve both cost and fidelity effects in the conventional audio system.
In view of the above problems, embodiments of the present invention provide a sound system, which uses a digital power amplification unit to amplify partial frequency band audio data, so as to reduce the cost of the sound system. In addition, the audio data analysis unit can carry out digital frequency division on the audio input signal to obtain more than two audio data with different frequency bands, each digital power amplification unit only amplifies the audio data with the received frequency band, and noise introduction is reduced as much as possible in a digital frequency division mode, so that the cost is reduced and the fidelity effect of the sound system is improved.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
Referring to fig. 1, an embodiment of the present invention provides an acoustic system that may include: an audio data parsing unit 11, two or more digital power amplifying units 12 and two or more playing units 13. The digital power amplifying units are in one-to-one correspondence with the playing units. Wherein:
the audio data analyzing unit 11 is adapted to digitally divide the audio input signal to obtain audio data with more than two different frequency bands, and send the obtained audio data to the corresponding digital power amplifying unit 12 respectively;
the digital power amplifying unit 12 is adapted to receive the corresponding audio data, amplify the power, restore the analog audio signal corresponding to the audio data in the received frequency band, and output the analog audio signal to the corresponding playing unit 13;
the playing unit 13 is adapted to sound under the drive of the analog audio signal.
In an implementation, the sound system has an audio input interface. The signal input by the audio input interface may be an analog audio signal or a digital audio signal, which is not limited herein. When the signal input by the audio input interface is an analog audio input signal, the audio data parsing unit 11 may convert the analog audio input signal into a digital audio signal, and then perform digital frequency division. When the signal input by the audio input interface is a digital audio signal, the audio data parsing unit 11 may directly perform digital frequency division on the digital audio signal.
In a specific implementation, the audio data parsing unit 11 may differentiate the digital audio signals in different frequency bands, then perform power amplification by the digital power amplifying units corresponding to the different frequency bands, and then input the amplified digital audio signals to the playing units in the corresponding frequency bands for playback.
In an implementation, the number of the digital power amplifying units and the number of the playing units can be set according to the fidelity requirement. The more frequency bands of the audio data obtained by the audio data parsing unit 11 after digital frequency division of the audio input signal, the better the final fidelity effect, but the more complex the structure of the sound system.
In an embodiment, referring to fig. 1, the audio data parsing unit 11 may divide the audio input signal into three frequency bands of audio data, which are high-pitched audio data, medium-pitched audio data, and low-pitched audio data, respectively. The corresponding frequency bands are not overlapped, and the audio data of each frequency band are combined together to form the audio input signal.
In a specific implementation, the audio data parsing unit 11 may be provided with a plurality of frequency dividing modules, through which the digital audio signal is divided. For example, the audio data parsing unit 11 may set a high-frequency-band frequency-division module, a medium-frequency-band frequency-division module, and a low-frequency-band frequency-division module, where the high-frequency-band frequency-division module may extract high-audio data from the digital audio signal. The mid-band crossover module may extract mid-range portion audio data from the digital audio signal and the low-band crossover module may extract low-range portion audio data from the digital audio signal.
Accordingly, the sound system may include: a treble digital power amplifying unit 121, a midrange digital power amplifying unit 122, and a bass digital power amplifying unit 123. The treble digital power amplification unit 121 may power-amplify the treble portion audio data and output a treble analog audio signal, the midrange digital power amplification unit 122 may power-amplify the midrange portion audio data and output a midrange analog audio signal, and the bass digital power amplification unit 123 may power-amplify the bass portion audio data and output a bass analog audio signal.
In a specific implementation, the digital power amplifying unit may extract the audio data of the corresponding frequency band from the received data packet, then perform pulse width modulation on the audio data of the extracted frequency band to form a pulse waveform with a certain duty ratio, after amplifying the pulse waveform by a switching circuit composed of MOS tubes, further filter out components of other frequency bands by a filter, and restore the amplified analog audio signal waveform. Therefore, the noise of the analog audio signal driving the playing unit is less, and the natural playing effect is better.
In a specific implementation, the audio data parsing unit 11 may include: a low power audio (BLE audio) transmission module 111. The low-power consumption audio transmitting module 111 is adapted to perform low-power consumption bluetooth packaging on the audio data with more than two different frequency bands to form a low-power consumption bluetooth audio data packet, and transmit the low-power consumption bluetooth audio data packet to the corresponding digital power amplifying unit.
In the existing sound system, a wired mode is generally used to send audio data to an analog power amplifier, which results in complicated connection of the sound system.
In an embodiment of the present invention, the low-power audio sending module 111 may wirelessly transmit audio data through BLE audio protocol, so that the connection between the audio data parsing unit and the digital power amplifying unit can be simplified and the complexity of the system can be reduced compared with the wired transmission mode.
Specifically, the low-power consumption audio transmitting module 111 may encapsulate audio data of all frequency bands obtained by digital frequency division to form a low-power consumption bluetooth audio data packet.
The BLE audio protocol is an intra-group broadcast protocol, that is, the number of receiving ends can be multiple, the receiving ends form the same receiving group, the low-power consumption audio sending module 111 can send the low-power consumption bluetooth audio data packet to each receiving end of the receiving group, and the low-power consumption bluetooth audio transmission can provide higher bandwidth, so that the audio data of multiple different frequency bands can be obtained through analysis by the audio data analysis unit 11, the low-power consumption audio sending module 111 can also synchronously send the audio data of multiple different frequency bands to each digital power amplification unit, the synchronism of audio data transmission is ensured, synchronous sounding by the playing unit is facilitated, and the fidelity effect is improved. In addition, compared with other wireless connection modes (such as WIFI), in the low-power-consumption audio transmission process, the two transmission parties keep a handshake state, so that the transmission has real-time directivity, and the transmission process is more stable.
Any digital power amplifying unit is represented by a digital power amplifying unit 12n, and accordingly, referring to fig. 2, the digital power amplifying unit 12n may include: the bluetooth receiving module 21 and the digital power amplifying module 22. Wherein:
the bluetooth receiving module 21 is adapted to receive the bluetooth low energy audio data packet and extract audio data of the audio segment;
the digital power amplification module 22 is adapted to power amplify the audio data extracted by the bluetooth receiving module and restore the corresponding analog audio signal.
In a specific implementation, the low-power audio transmitting module 111 (as shown in fig. 1) and the bluetooth receiving module 21 maintain a handshake state after the bluetooth connection is established, so that the transmission has real-time directionality, thereby improving the stability of the transmission.
In a specific implementation, the digital power amplification module 22 may power amplify the extracted audio data according to the power of the existing digital power amplifier, which is typically within 50W. At this time, since one digital power amplifying module 22 only drives part of the audio signals in the frequency band to play, but not drives the audio signals in the full frequency band to play, the introduced noise is less, and the fidelity effect is still better than that of the scheme that one digital power amplifier drives to play the audio signals in the full frequency band.
In an embodiment, the digital power amplification module 22 may replace the MOS transistor in the switch circuit with a transistor with larger power to increase the amplification power of the digital power amplification module 22, so that the digital power amplification module 22 is about 10 times of the original digital power amplification power, for example, the amplification power of the digital power amplification module 22 is 300W, at this time, since the digital power amplification module 22 only drives part of the frequency band audio signal to play, even if the power is increased, the noise is less introduced, and the larger the power of the digital power amplification module 22, the better the fidelity effect of the sound system can be.
Accordingly, the sound system may include: a high-pitched sound playing unit 131, a medium-pitched sound playing unit 132, and a low-pitched sound playing unit 13N. The high-pitch playing unit 131 may sound under the driving of the high-pitch analog audio signal, the medium-pitch playing unit 132 may sound under the driving of the medium-pitch analog audio signal, and the low-pitch playing unit 13N may sound under the driving of the low-pitch analog audio signal. In this way, the digital power amplifying unit directly drives the playing units in the corresponding frequency bands to sound, and the playing units in the corresponding frequency bands do not sound.
In a specific implementation, each playing unit may include only one speaker, where three playing places include three speakers.
In some embodiments, in order to improve the fidelity effect, each playing unit may also include two or more speakers, and the playing units are placed in different spatial positions, where the on-site sound effect recovery is performed by using different spatial positions and the number of speakers, so that the audio with high fidelity can be obtained in the user experience area.
As can be seen from the above, in the sound system according to the embodiment of the present invention, firstly, according to the frequency, the audio input signal is parsed into the digital audio data of different frequency bands, and then the digital audio data is distributed to the playing unit, and the playing unit drives the speaker of the corresponding frequency band to sound through the digital power amplifier after receiving the digital audio data, thereby realizing the isolation of the high, medium and low signals, and finally obtaining the audio restoration of the high-fidelity reverberation through the processing of the spatial position. In other words, the scheme of the invention adopts the modes of digital frequency division and digital power amplifier driving to realize the isolation and playing of high, medium and low tones, and finally realizes the high-fidelity playing system with high efficiency and saving. In addition, the BLE audio sending module distributes the audio data to each playing unit, so that the complexity of the system can be reduced, the synchronism of data transmission can be ensured, and the fidelity effect can be further improved.
In order to better understand and implement the present invention, a detailed description of the apparatus, the test system, the electronic device, and the computer-readable storage medium corresponding to the above method is provided below.
Referring to fig. 3, an embodiment of the present invention further provides a control method of an acoustic system, where the acoustic system includes: the device comprises an audio data analysis unit, more than two digital power amplification units and more than two playing units, wherein the digital power amplification units are in one-to-one correspondence with the playing units; the method comprises the following steps:
For example, the audio data parsing unit performs digital parsing on the audio input signal to obtain high-pitch portion audio data, medium-pitch portion audio data, and low-pitch portion audio data, respectively. The treble portion audio data may be received and power amplified by a treble digital power amplifying unit. The midrange portion audio data may be received and power amplified by a midrange digital power amplifying unit. The bass portion audio data may be received and power amplified by a bass digital power amplification unit.
In a specific implementation, the audio data parsing unit may perform bluetooth low energy encapsulation on the audio data of the different audio segments obtained by parsing to form a bluetooth low energy audio data packet, and then send the bluetooth low energy audio data packet to all the digital power amplifying units.
And step 32, receiving corresponding audio data by the digital power amplifying unit, amplifying the power, recovering an analog audio signal corresponding to the audio data of the received frequency band, and outputting the analog audio signal to a corresponding playing unit.
In an implementation, each digital power amplifying unit receives the bluetooth low energy audio data packet and extracts audio data of the frequency band. For example, the high-pitch digital power amplifying unit receives the bluetooth low energy audio data packet and extracts the high-pitch audio data. The middle voice digital power amplifying unit receives the low-power consumption Bluetooth audio data packet and extracts middle voice part audio data. The low-sound digital power amplifying unit receives the low-power consumption Bluetooth audio data packet and extracts the audio data of the low-sound part.
Step 33, sounding by the playing unit under the drive of the analog audio signal.
In a specific implementation, after the digital power amplification unit performs power amplification on the extracted audio data, a corresponding analog audio signal can be obtained, and the analog audio signal drives the playing unit to sound.
In a specific implementation, the playing unit can be placed at different spatial positions, so that high-fidelity sound effect is achieved through acoustic environment reverberation.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (10)
1. An audio system, comprising: the device comprises an audio data analysis unit, more than two digital power amplification units and more than two playing units, wherein the digital power amplification units are in one-to-one correspondence with the playing units; wherein:
the audio data analysis unit is suitable for carrying out digital frequency division on the audio input signal to obtain audio data with more than two different frequency bands, and respectively sending the obtained audio data to the corresponding digital power amplification unit;
the digital power amplifying unit is suitable for receiving corresponding audio data, amplifying power, recovering an analog audio signal corresponding to the audio data of the received frequency band, and outputting the analog audio signal to the corresponding playing unit;
the playing unit is suitable for sounding under the drive of the analog audio signal.
2. The sound system of claim 1, wherein the audio data for the two or more different frequency bands comprises: high-pitched part audio data, medium-pitched part audio data, and low-pitched part audio data; the two or more digital power amplifying units include: a high-pitch digital power amplifying unit, a medium-pitch digital power amplifying unit and a low-pitch digital power amplifying unit;
the playback unit includes: a high-pitch playing unit, a medium-pitch playing unit and a low-pitch playing unit.
3. The sound system of claim 1, wherein the audio data parsing unit includes:
the low-power consumption audio transmission module is suitable for carrying out low-power consumption Bluetooth encapsulation on the audio data with more than two different frequency bands to form a low-power consumption Bluetooth audio data packet and transmitting the low-power consumption Bluetooth audio data packet to the corresponding digital power amplification unit.
4. A sound system according to claim 3, wherein the digital power amplifying unit comprises:
the Bluetooth receiving module is suitable for receiving the low-power Bluetooth audio data packet and extracting audio data of the sound section; and the power amplification module is suitable for carrying out power amplification on the audio data extracted by the Bluetooth receiving module and recovering corresponding analog audio signals.
5. The sound system of claim 4, wherein the digital power amplification module has an amplification power greater than 300W.
6. The sound system of claim 1, wherein the two or more playback units are each located at a different spatial location.
7. The sound system of claim 6, wherein the playback unit includes at least one speaker.
8. A control method of an acoustic system, characterized in that the acoustic system comprises: the device comprises an audio data analysis unit, more than two digital power amplification units and more than two playing units, wherein the digital power amplification units are in one-to-one correspondence with the playing units; the method comprises the following steps:
when an audio input signal is received, the audio data analyzing unit carries out digital analysis on the audio input signal to obtain audio data of more than two different sound segments, and the obtained audio data are respectively sent to corresponding digital power amplifying units;
the digital power amplifying unit receives the corresponding audio data, amplifies the power, restores the analog audio signal corresponding to the audio data of the received frequency band and outputs the analog audio signal to the corresponding playing unit;
sounding by the playing unit under the drive of the analog audio signal.
9. The control method according to claim 8, wherein the transmitting the obtained audio data to the corresponding digital power amplifying units, respectively, includes:
and carrying out low-power Bluetooth packaging on the audio data of more than two different sound segments to form a low-power Bluetooth audio data packet, and sending the low-power Bluetooth audio data packet to the corresponding digital power amplifying unit.
10. The control method of claim 9, wherein the receiving, by the digital power amplification unit, the corresponding audio data comprises:
and the digital power amplification unit receives the low-power consumption Bluetooth audio data packet and extracts audio data of the frequency band.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116486828A (en) * | 2023-06-14 | 2023-07-25 | 北京觅图科技有限公司 | Audio data processing method, device and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116486828A (en) * | 2023-06-14 | 2023-07-25 | 北京觅图科技有限公司 | Audio data processing method, device and system |
| CN116486828B (en) * | 2023-06-14 | 2023-09-08 | 北京觅图科技有限公司 | Audio data processing method, device and system |
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