CN112135285B - Real-time audio interaction method for multi-Bluetooth audio equipment - Google Patents
Real-time audio interaction method for multi-Bluetooth audio equipment Download PDFInfo
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- CN112135285B CN112135285B CN202011065156.XA CN202011065156A CN112135285B CN 112135285 B CN112135285 B CN 112135285B CN 202011065156 A CN202011065156 A CN 202011065156A CN 112135285 B CN112135285 B CN 112135285B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/40—Connection management for selective distribution or broadcast
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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
Abstract
The invention discloses a real-time audio interaction method of multiple Bluetooth audio devices, which comprises at least one first Bluetooth audio device and at least one second Bluetooth audio device, and comprises the following steps: LE Audio chips are respectively arranged in the first Bluetooth Audio device and the second Bluetooth Audio device, bluetooth connection between the first Bluetooth Audio device and the second Bluetooth Audio device is established through the LE Audio chips, and Bluetooth data packet transmission is carried out. The LE Audio chip adopts an LC3 codec, has a very high compression ratio, can greatly reduce the transmission time of Audio data, and reduces the total transmission delay of the Audio data to the extent that the requirements of on-site real-time interaction can be met; and the Bluetooth wireless communication system also has the functions of Bluetooth broadcasting and multiple streaming transmission, and can realize that one first Bluetooth audio device broadcasts one or more audio streams to a plurality of second Bluetooth audio devices so as to meet the requirements of on-site multi-person real-time entertainment audio.
Description
Technical Field
The invention relates to the technical field of audio signal processing, in particular to a real-time audio interaction method of multi-Bluetooth audio equipment.
Background
Currently, bluetooth audio transmission on the market is generally based on the A2DP protocol, supporting most standard audio compression codecs. In view of the computing capability of the intelligent mobile terminal, in the audio transmission process of the intelligent mobile terminal, an SBC encoder is generally adopted to compress and encode audio data, and then the audio data is transmitted to a receiving end by a sending end.
However, the SBC encoder has a long encoding time for audio data, resulting in high internal delay thereof; secondly, the compression ratio of the SBC encoder to the audio data is low, in the transmission process, one frame of encoded audio data needs to be decomposed into two audio data frames when the audio data is filled into the A2DP Bluetooth data packet so as to form an A2DP Bluetooth data packet for transmission, and the SBC decoder can decode the decomposed frames only after receiving two or more A2DP Bluetooth data packets, so that the transmission delay time is greatly increased.
Therefore, the current audio transmission mode based on SBC coding has high delay, and cannot meet the requirements of on-site real-time entertainment audio in practical application, for example, APP on-site singing, multi-person on-site antiphonal singing, audio games and electronic fight games based on mobile terminals, and especially, the audio delay of electronic fight can cause the asynchronism of sound and image, so that the operation experience of users on fight time is greatly affected.
Disclosure of Invention
Aiming at the problems existing in the prior art, the main purpose of the invention is to provide a real-time audio interaction method of multi-Bluetooth audio equipment, aiming at reducing the transmission delay of intermediate frequency data in the audio interaction process, so that the on-site real-time audio interaction between the Bluetooth audio equipment can be realized.
In order to achieve the above objective, the present invention provides a real-time audio interaction method for multiple bluetooth audio devices, wherein the bluetooth audio devices include at least one first bluetooth audio device and at least one second bluetooth audio device. The real-time audio interaction method of the multi-Bluetooth audio device comprises the following steps:
LE Audio chips are respectively arranged in the first Bluetooth Audio device and the second Bluetooth Audio device, bluetooth connection between the first Bluetooth Audio device and the second Bluetooth Audio device is established through the LE Audio chips, and first Bluetooth data packet transmission is carried out.
Optionally, the establishing, by the LE Audio chip, bluetooth connection and first bluetooth packet transmission between the first bluetooth Audio device and the second bluetooth Audio device includes:
the first Bluetooth Audio device broadcasts first Bluetooth connection data through an LE Audio chip;
the second Bluetooth Audio device receives the first Bluetooth connection data through the LE Audio chip and returns response data;
the first Bluetooth audio device establishes Bluetooth connection between the first Bluetooth audio device and the second Bluetooth audio device according to the response data;
transmitting a first Bluetooth data packet between the first Bluetooth audio device and the second Bluetooth audio device;
wherein the encoded audio data is compressed in the first bluetooth data packet.
Optionally, the establishing, by the LE Audio chip, bluetooth connection and first bluetooth packet transmission between the first bluetooth Audio device and the second bluetooth Audio device includes:
the first Bluetooth Audio device broadcasts first broadcast data through an LE Audio chip;
the second Bluetooth Audio device receives the first broadcast data through an LE Audio chip, and sends a first Bluetooth data packet to the first Bluetooth Audio device or receives the first Bluetooth data packet broadcast by the first Bluetooth Audio device;
wherein the encoded audio data is compressed in the first bluetooth data packet.
Optionally, the LE Audio chip includes an LC3 encoder and an LC3 decoder;
when the first Bluetooth data packet is sent, the audio data is encoded and compressed into the first Bluetooth data packet by the LC3 encoder;
upon receiving the first bluetooth packet, encoded audio data is extracted and decoded by the LC3 decoder.
Optionally, the first bluetooth data packet is an A2DP bluetooth data packet.
Optionally, the audio data is a multiple and independent audio stream.
Optionally, the first bluetooth audio device is a smart phone, a tablet, a portable computer or an audio player.
Optionally, the second bluetooth audio device is a wireless microphone, a wireless headset or a hearing aid.
Optionally, the method further comprises at least one third bluetooth audio device, and comprises the following steps:
setting an LE Audio chip in the third Bluetooth Audio device, establishing Bluetooth connection between the third Bluetooth Audio device and the first Bluetooth Audio device and Bluetooth data transmission through the LE Audio chip, and establishing Bluetooth connection between the third Bluetooth Audio device and the second Bluetooth Audio device and Bluetooth data transmission.
Optionally, the real-time audio interaction method further comprises:
before a first Bluetooth data packet is transmitted between the first Bluetooth audio device and the second Bluetooth audio device, the second Bluetooth audio device receives the first Bluetooth data packet, extracts encoded audio data to perform audio editing processing, compresses the processed audio data again to a second Bluetooth data packet, and sends the second Bluetooth data packet to the second Bluetooth audio device.
According to the invention, the LE Audio chips are arranged in the first Bluetooth Audio device and the second Bluetooth Audio device, so that the decompression, encoding and decoding and transmission of Audio data to be transmitted are realized through the LE Audio chips, the transmission delay of the Audio data can be greatly reduced, and the on-site real-time Audio interaction between the first Bluetooth Audio device and the second Bluetooth Audio device can be realized.
Compared with the existing Audio transmission mode based on the SBC encoder, the LE Audio chip adopts a low-complexity LC3 Audio codec, the LC3 encoder has a very high compression ratio, 1.5MBps of Audio data can be compressed to 192Kbps, the time for Audio data transmission is greatly reduced, and the total delay of Audio data transmission is reduced to meet the field real-time Audio interaction requirement; the LC3 codec also has the characteristic of providing high tone quality at low data rate, and provides higher tone quality experience while meeting the requirements of on-site real-time audio interaction.
In addition, the LE Audio chip can realize multiple and independent Audio streaming transmission between a single Audio source device and a single or multiple Audio receiving devices synchronously. Therefore, when the first Bluetooth audio device is an audio source device and the second Bluetooth audio device is an audio receiving device, the first Bluetooth audio device and the plurality of first Bluetooth audio devices can carry out multiple and independent audio streaming transmission.
And moreover, the LE Audio chip also has a Bluetooth broadcasting function, so that a single Audio source device can broadcast one Audio stream or a plurality of independent Audio streams to a plurality of Audio receiving devices, one Bluetooth Audio device and other Bluetooth Audio devices can carry out Audio transmission, convenience is provided for the on-site real-time Audio interaction of a plurality of people, and the problem of compatibility of interconnection of a plurality of devices does not exist.
Therefore, the real-time audio interaction method provided by the invention can well meet the requirements of on-site multi-person real-time entertainment audio.
Drawings
Fig. 1 is a schematic diagram of a wireless audio system according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a first embodiment of the real-time audio interaction method in connection-oriented mode according to the present invention;
FIG. 3 is a flowchart of a real-time audio interaction method according to a first embodiment of the present invention in a broadcast connection mode;
FIG. 4 is a schematic diagram of a wireless audio system of the present invention in a first application scenario;
fig. 5 is a schematic diagram of a frame of the wireless audio system according to the present invention in a second application scenario;
fig. 6 is a schematic diagram of a frame of the wireless audio system according to the present invention in a third application scenario;
fig. 7 is a schematic diagram of a frame of the wireless audio system according to the present invention in a fourth application scenario;
FIG. 8 is a schematic diagram of a wireless audio system according to a second embodiment of the present invention;
fig. 9 is a schematic flow chart of a second embodiment of the real-time audio interaction method in a broadcast connection mode according to the present invention;
fig. 10 is a schematic diagram of a frame of the wireless audio system according to the present invention in a fifth application scenario;
fig. 11 is a schematic diagram of a frame of the wireless audio system according to the present invention in a fifth application scenario;
fig. 12 is a schematic diagram of a frame of the wireless audio system according to the present invention in a fifth application scenario.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1-3, fig. 1 is a schematic diagram of a frame of a first embodiment of a wireless audio system according to the present invention, fig. 2 is a schematic diagram of a flow of the first embodiment of a real-time audio interaction method according to the present invention in a connection-oriented mode, and fig. 3 is a schematic diagram of a flow of the first embodiment of the real-time audio interaction method according to the present invention in a broadcast connection mode. Wherein the broken line in fig. 1 represents the connection signal and the solid line represents the data signal. Likewise, the broken lines in fig. 4 to 7 represent connection signals, and the solid lines represent data signals.
As shown in fig. 1-3, an embodiment of the present invention provides a wireless audio system formed by multiple bluetooth audio devices, including at least a first bluetooth audio device 1 and at least a second bluetooth audio device 2. In the embodiment of the invention, the first bluetooth audio device 1 is a smart mobile terminal, which may be, but is not limited to, a smart phone, a tablet, a portable computer, and an audio player. The second bluetooth audio device 2 is an audio transmission means for audio transmission and/or reception, which may be, but is not limited to, a wireless microphone, a wireless headset and a hearing aid.
LE Audio chips are respectively arranged in each first Bluetooth Audio device 1 and each second Bluetooth Audio device 2. Therefore, bluetooth connection between one first Bluetooth Audio device 1 and a plurality of second Bluetooth Audio devices 2 can be established through the LE Audio chip, and one-to-many Bluetooth data packet transmission is realized; or a plurality of bluetooth connections between the first bluetooth audio device 1 and one second bluetooth audio device 2 are established, whereby a many-to-one bluetooth data packet transmission is achieved.
In the embodiment of the invention, the LE Audio chips are preloaded in the first bluetooth Audio device 1 and the second bluetooth Audio device 2, and when the first bluetooth Audio device 1 needs to perform bluetooth Audio transmission with the second bluetooth Audio device 2, the respective LE Audio chips can be directly started to perform bluetooth connection and perform bluetooth data packet transmission.
In the embodiment of the invention, the LE Audio chip can provide two connection modes: connection-oriented mode and broadcast connection mode.
As shown in fig. 1 (a) and fig. 2, in the connection-oriented mode, the first bluetooth audio device 1 and the second bluetooth audio device 2 perform bluetooth connection and first bluetooth packet transmission, including:
the first bluetooth Audio device 1 broadcasts a first bluetooth connection data via the LE Audio chip.
And the second Bluetooth Audio device 2 receives the first Bluetooth connection data through the LE Audio chip and returns response data.
A bluetooth connection of the first bluetooth audio device 1 and the second bluetooth audio device 2 is established by the first bluetooth audio device 1 on the basis of the response data.
A first bluetooth data packet transmission takes place between the first bluetooth audio device 1 and the second bluetooth audio device 2.
Wherein the encoded audio data is compressed in the first bluetooth packet.
In the connection-oriented mode, the first bluetooth audio device 1 and the second bluetooth audio device 2 are in bidirectional communication, and bluetooth data packets can be mutually transmitted between the two bluetooth audio devices.
As shown in fig. 1 (b) and fig. 3, in the broadcast connection mode, the first bluetooth audio device 1 and the second bluetooth audio device 2 perform bluetooth connection and first bluetooth packet transmission, including:
the first bluetooth Audio device 1 broadcasts a first broadcast data through the LE Audio chip.
The second bluetooth Audio device 2 receives the first broadcast data through the LE Audio chip, and sends a first bluetooth data packet to the first bluetooth Audio device 1, or receives the first bluetooth data packet broadcast by the first bluetooth Audio device 1. Wherein the encoded audio data is compressed in the first bluetooth packet.
In the broadcast connection mode, the first bluetooth audio device 1 and the second bluetooth audio device 2 are in unidirectional communication, and the first bluetooth audio device 1 can only receive or transmit bluetooth data packets in one direction.
In the embodiment of the invention, the LE Audio chip comprises an LC3 encoder and an LC3 decoder. Thus, when the first bluetooth audio device 1 or the second bluetooth audio device 2 transmits the first bluetooth data packet, the audio data is encoded by the LC3 encoder and compressed into the first bluetooth data packet. When the first bluetooth audio device 1 or the second bluetooth audio device 2 receives the first bluetooth data packet, the encoded audio data is extracted by the first bluetooth audio device 1 or the second bluetooth audio device 2, and the encoded audio data is decoded by an LC3 decoder in the first bluetooth audio device 1 or the second bluetooth audio device 2.
Wherein the LC3 encoder is a spectral transform encoder that can convert a time domain signal of audio into a spectral coefficient representation. The LC3 encoder specifically comprises an LD-MDCT transformation module, an SNS spectrum noise shaping module, a TNS time domain noise shaping module, a spectrum quantization module and a noise level estimation module which are connected in sequence. The LD-MDCT transform module is used to convert a time domain signal of an audio input into a spectrum signal and group corresponding energy values into respective frequency bands. The SNS spectral noise shaping module is configured to process the corresponding frequency components to reduce perceived spectral quantization noise. The TNS temporal noise shaping module is configured to reduce perceived temporal quantization noise. The spectrum quantization module is used for quantizing the components shaped by the SNS spectrum noise shaping module and the TNS time domain noise shaping module. The noise level estimation module is used for the appropriate level to be used by the decoder.
The LC3 decoder inverts the encoding process and converts the spectral coefficients into time domain signals, which are not described in detail herein.
It should be noted that the LC3 encoder and the LC3 decoder are prior art, and the present solution does not make corresponding improvements for both, and is mainly characterized by using the LC3 encoder and the LC3 decoder to implement encoding and decoding of audio data. Compared with an SBC codec, the LC3 codec has higher compression ratio of data, greatly reduces the time of audio data transmission, and reduces the total transmission delay of the audio data to meet the field real-time audio interaction requirement; and the LC3 codec also has the characteristic of providing high tone quality at low data rate, and provides convenience for providing higher tone quality experience while meeting the on-site real-time audio interaction requirement.
In the embodiment of the present invention, the first bluetooth packet is an A2DP bluetooth packet. After the connection is established between the first bluetooth audio device 1 and the second bluetooth audio device 2, the A2DP bluetooth data packet is sent out by the first bluetooth audio device 1 or the second bluetooth audio device 2 in a frame format, each frame of data has a time period, and the second bluetooth audio device 2 or the first bluetooth audio device 1 only receives the data received in the time period, and the received data in the time period is discarded. Thus, when the number of audio receivers is more than two, the synchronization of the received data of the audio receivers is ensured.
In the embodiment of the present invention, the LC3 codec is capable of transmitting a plurality of independent audio streams simultaneously, so that the audio data can be transmitted in the form of multiple independent audio streams. Like this, when first bluetooth audio equipment 1 is audio source equipment, when second bluetooth audio source equipment is wireless earphone, first bluetooth audio equipment 1 can be to wireless earphone's left earphone and right earphone respectively transmission mutually independent audio stream to realize stereophonic experience, and audio data can reach left earphone and right earphone simultaneously, make audio playback more smooth and easy.
For easy understanding, the real-time audio interaction method provided by the embodiment of the invention is further described below in connection with a specific application scenario.
As shown in fig. 4, in a first application scenario, the wireless audio system comprises one first bluetooth audio device 1a and a plurality of second bluetooth audio devices 2a. The first Bluetooth audio device 1a is a smart phone and serves as an audio initiator; the second bluetooth audio device 2a is a wireless headset as an audio receiver. Thus, when the user A finds a song on the smart phone, the user A can share the song with friends around the user A wearing the wireless earphone, and the user A enjoys the music together with the friends.
In the use process, if the wireless earphone does not need a control request of the smart phone, the smart phone establishes one-way connection with the wireless earphone in a broadcasting mode.
As shown in fig. 5, in the second application scenario, the wireless audio system includes one first bluetooth audio device 1b and a plurality of second bluetooth audio devices 2b. The first Bluetooth audio device 1b is a portable computer and is used as an audio initiator; the second bluetooth audio device 2b is a wireless headset as an audio receiver. Thus, in the live lecture, the portable computer can transmit the received lecture content to the wireless headset in a broadcast form so that each listener can hear the lecture content.
As shown in fig. 6, in the third application scenario, the wireless audio system includes a plurality of first bluetooth audio devices 1c and one second bluetooth audio device 2c. The first bluetooth audio device 1c is a smart phone and is used as an audio receiver; the second bluetooth audio device 2c is a wireless microphone as an audio initiator. Therefore, when in site speech, the speech content of the lecturer can be directly transmitted to the mobile phone of the audience through the wireless microphone, so that the audience can conveniently receive speech audio through the mobile phone.
As shown in fig. 7, in the fourth application scenario, the wireless audio system includes one first bluetooth audio device 1d and a plurality of second bluetooth audio devices 2d. The first Bluetooth audio device 1d is a sound box and serves as an audio receiver; the second bluetooth audio device 2d is a wireless microphone as an audio initiator.
Thus, when a plurality of persons perform on-site antiphonal singing, singers can sing songs through respective microphones and send the songs to the sound box for playing.
In addition, the device can also be used for audio entertainment activities such as multi-person on-site K song games and the like.
In addition, the wireless microphone can also be used for playing by multiple players on site, and the wireless microphone collects the audio sent by the multiple players and sends the audio to a sound box on site for playing.
Referring to fig. 8 and fig. 9, fig. 8 is a schematic diagram of a frame of a second embodiment of a wireless audio system according to the present invention, and fig. 9 is a schematic diagram of a flow chart of a second embodiment of a real-time audio interaction method according to the present invention in a broadcast connection mode.
As shown in fig. 8 to 9, in an embodiment of the present invention, a wireless Audio system is provided by multiple bluetooth Audio devices, where the system includes at least a third bluetooth Audio device in addition to the first bluetooth Audio device 1 and the second bluetooth Audio device 2 as described in the first embodiment, and an LE Audio chip is also disposed in the third bluetooth Audio device, and the LE Audio chip is used to establish a bluetooth connection between the third bluetooth Audio device and the first bluetooth Audio device 1 and perform bluetooth data transmission, and establish a bluetooth connection between the third bluetooth Audio device and the second bluetooth Audio device 2 and perform bluetooth data transmission.
Based on the wireless audio system, the embodiment of the invention also provides a real-time audio interaction method based on connection, which comprises the following steps:
bluetooth connections of the first bluetooth audio device 1 and the third bluetooth audio device 3, and the third bluetooth audio device 3 and the second bluetooth audio device 2 are established, respectively. The specific establishment procedure is the same as the implementation of a given procedure principle, and is not described in detail here.
A first bluetooth data packet is transmitted by the first bluetooth audio device 1 to the third bluetooth audio device 3.
The third bluetooth audio device 3 receives the first bluetooth data packet, extracts the encoded audio data compressed in the first bluetooth data packet, performs editing processing, compresses the audio data into a second bluetooth data packet, and sends the second bluetooth data packet to the second bluetooth audio device 2.
The second bluetooth audio device 2 extracts the audio data in the second bluetooth data packet for decoding and playing.
In addition, the second bluetooth audio device 2 may also transmit the first bluetooth data packet, and the first bluetooth audio device 1 may receive and decode and play the first bluetooth data packet.
In the embodiment of the present invention, the third bluetooth audio device 3 may be in broadcast connection or connection-oriented with the first bluetooth audio device 1 and the second bluetooth audio device 2, and if the third bluetooth audio device 3 does not need to transmit a control request with the first bluetooth audio device 1 and the second bluetooth audio device 2, a broadcast connection mode is preferentially adopted.
In the embodiment of the present invention, the audio editing process on the encoded audio data mainly refers to beautifying or speech translating the audio, and of course, other processes may also be performed on the audio, for example, background noise reduction, voice part enhancement, background music enhancement, and so on. Therefore, in the present embodiment, the third bluetooth audio device 3 may be, but is not limited to, a translator, a sound transformer, and a tuning machine.
In the embodiment of the invention, since the third bluetooth audio device 3 for audio editing processing is added, the first bluetooth audio device 1 may be a wireless earphone, a wireless microphone, a hearing aid, or the like, in addition to the intelligent terminal device.
For easy understanding, the real-time audio interaction method provided by the embodiment of the invention is further described below in connection with a specific application scenario.
As shown in fig. 10, in the fifth application scenario, the wireless audio system includes one first bluetooth audio device 1e, a plurality of second bluetooth audio devices 2e, and one third bluetooth audio device 3a. The first Bluetooth audio device 1e is a sound box and serves as an audio receiver; the second bluetooth audio device 2e is a wireless microphone, serving as an audio initiator; the third bluetooth audio device 3a is a sound transformer for performing sound transformation processing on the audio collected by the wireless microphone.
Thus, when the multi-user K song is performed, the wireless microphone collects and transmits the sound generated by the corresponding K song users to the third Bluetooth audio device 3a, and the third Bluetooth audio device 3a uniformly processes the sound of the multi-user into male middle tones, female high tones, raili tones, girl tones, large tertiary tones and the like, so that the pleasure of the K song is increased.
As shown in fig. 11, in the sixth application scenario, the wireless audio system includes a first bluetooth audio device 1f, a plurality of second bluetooth audio devices 2f, and a plurality of third bluetooth audio devices 3b, where the third bluetooth audio devices 3b are in one-to-one correspondence with the second bluetooth audio devices 2 f. The first Bluetooth audio device 1f is a sound box and serves as an audio receiver; the second bluetooth audio device 2f is a wireless microphone, serving as an audio initiator; the third bluetooth audio device 3b is a sound transformer, and is configured to perform sound transformation processing on the audio collected by the wireless microphone.
Therefore, when the multi-user K song is carried out, the wireless microphone collects the sound emitted by the corresponding K song users and sends the sound to the third Bluetooth audio devices 3b, and the sound of the multi-user is respectively subjected to sound changing processing by the plurality of third Bluetooth audio devices 3b, so that the pleasure of the K song is increased.
As shown in fig. 12, in the seventh application scenario, the wireless audio system includes one first bluetooth audio device 1g, a plurality of second bluetooth audio devices 2g, and a plurality of third bluetooth audio devices 3c, wherein the number of second bluetooth audio devices 2g is greater than the number of third bluetooth audio devices 3c, and one third bluetooth audio device 3c corresponds to the plurality of second bluetooth audio devices 2 g.
The first Bluetooth audio device 1g is a wireless microphone and serves as an audio initiator; the second Bluetooth audio device 2g is a wireless earphone and is used as an audio receiver; the third bluetooth audio device 3c is a translator for performing a sound modification process on the audio collected by the wireless microphone.
Therefore, in a multi-country conference or an international conference, the wireless microphone can conference the speech of a speaker or a lecturer, the wireless microphone sends the speech in real time to each translator in a broadcast mode, and each translator translates the speech into different speech and then broadcasts the different speech to participants or listeners in each country, so that the participants or the lectures can understand the content of the speech in time.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A real-time audio interaction method for multiple bluetooth audio devices, wherein the bluetooth audio devices include at least one first bluetooth audio device and at least one second bluetooth audio device, comprising the steps of:
LE Audio chips are respectively arranged in the first Bluetooth Audio device and the second Bluetooth Audio device, bluetooth connection between the first Bluetooth Audio device and the second Bluetooth Audio device is established through the LE Audio chips, and first Bluetooth data packet transmission is carried out;
the first Bluetooth audio device is a smart phone, a tablet, a portable computer or an audio player;
the second Bluetooth audio device is a wireless microphone, a wireless earphone or a hearing aid;
the method also comprises at least one third Bluetooth audio device and comprises the following steps:
setting an LE Audio chip in the third Bluetooth Audio device, establishing Bluetooth connection between the third Bluetooth Audio device and the first Bluetooth Audio device and Bluetooth data transmission through the LE Audio chip, and establishing Bluetooth connection between the third Bluetooth Audio device and the second Bluetooth Audio device and Bluetooth data transmission;
before a first Bluetooth data packet is transmitted between the first Bluetooth audio device and the second Bluetooth audio device, the third Bluetooth audio device receives the first Bluetooth data packet, extracts encoded audio data to carry out audio editing processing, compresses the processed audio data again to a second Bluetooth data packet, and sends the second Bluetooth data packet to the second Bluetooth audio device;
audio editing of encoded audio data refers to the beautification of audio, including sound variation, background noise reduction, partial enhancement of human voice, and background music enhancement.
2. The method for real-time Audio interaction of multiple bluetooth Audio devices according to claim 1, wherein said establishing a bluetooth connection and a first bluetooth packet transmission between said first bluetooth Audio device and said second bluetooth Audio device through said LE Audio chip comprises:
the first Bluetooth Audio device broadcasts first Bluetooth connection data through an LE Audio chip;
the second Bluetooth Audio device receives the first Bluetooth connection data through the LE Audio chip and returns response data;
the first Bluetooth audio device establishes Bluetooth connection between the first Bluetooth audio device and the second Bluetooth audio device according to the response data;
transmitting a first Bluetooth data packet between the first Bluetooth audio device and the second Bluetooth audio device;
wherein the encoded audio data is compressed in the first bluetooth data packet.
3. The method for real-time Audio interaction of multiple bluetooth Audio devices according to claim 1, wherein said establishing a bluetooth connection and a first bluetooth packet transmission between said first bluetooth Audio device and said second bluetooth Audio device through said LE Audio chip comprises:
the first Bluetooth Audio device broadcasts first broadcast data through an LE Audio chip;
the second Bluetooth Audio device receives the first broadcast data through an LE Audio chip, and sends a first Bluetooth data packet to the first Bluetooth Audio device or receives the first Bluetooth data packet broadcast by the first Bluetooth Audio device;
wherein the encoded audio data is compressed in the first bluetooth data packet.
4. A method of real-time Audio interaction for a multiple bluetooth Audio device according to claim 2 or 3, wherein the LE Audio chip comprises an LC3 encoder and an LC3 decoder;
when the first Bluetooth data packet is sent, the audio data is encoded and compressed into the first Bluetooth data packet by the LC3 encoder, or the encoded audio data is decoded by the LC3 decoder;
upon receiving the first bluetooth packet, encoded audio data is extracted and decoded by the LC3 decoder.
5. The method of real-time audio interaction of a multiple bluetooth audio device according to claim 1, wherein the first bluetooth data packet is an A2DP bluetooth data packet.
6. A method of real-time audio interaction for a multiple bluetooth audio device according to claim 2 or 3, wherein the audio data is multiple and independent audio streams.
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| CN113573290A (en) * | 2021-07-15 | 2021-10-29 | 深圳市星科启电子商务有限公司 | Scenic spot information interaction method and scenic spot service system |
| CN113993114B (en) * | 2021-11-15 | 2024-04-09 | 歌尔科技有限公司 | Bluetooth broadcasting method, device and computer readable storage medium |
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