CN111385780A - Bluetooth audio signal transmission method and device - Google Patents
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Abstract
The embodiment of the invention discloses a Bluetooth audio signal transmission method and a device, wherein the method comprises the following steps: constructing an RFCOMM communication channel and an HFP bidirectional transmission channel between the target device and the target device end to obtain a remote user sound signal; performing sound mixing processing on the local digital audio signal and the remote user sound signal, and outputting a sound mixing signal or a stereo sound mixing signal; carrying out coding processing to obtain a first uplink audio transmission signal, and transmitting the first uplink audio transmission signal to a target device end by using an RFCOMM communication channel; and encoding the local digital audio processing signal while transmitting the first uplink audio transmission signal to obtain a second uplink audio transmission signal, and transmitting the first uplink audio transmission signal to a target device end by using an HFP (HFP) bidirectional transmission channel. The method of the invention can realize the interoperation of the back transmission, the sound mixing, the monitoring playback and the like of the audio signal, and improve the transmission efficiency and the transmission quality of the audio signal.
Description
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a Bluetooth audio signal transmission method and device, and further relates to electronic equipment and a computer readable storage medium.
Background
In recent years, with the rapid development of scientific technology, digital wireless audio transmission technology is gradually perfected and matured, and the application range of the technology is gradually expanded. With the development of digital wireless audio transmission technology, the bluetooth audio transmission technology is also widely used, such as: the Bluetooth device is applied to Bluetooth devices such as Bluetooth earphones, Bluetooth sound boxes and Bluetooth microphones. However, with the rapid development of economic society, the requirements of various industries on the bluetooth audio transmission technology are higher and higher.
At present, in the conventional bluetooth audio service, the transmission of the uplink signal can be realized through HFP, and the uplink signal is a single-channel 16khz or 8khz sampling signal; if HFP is in operation, other bluetooth audio just can't be operated, can't go upward the transmission audio promptly and carry out the downstream transmission of high-quality audio frequency simultaneously, have very big limitation for audio data can't realize interoperation, for example mix the sound together, listen playback and pass back together etc.. Therefore, the prior art is sometimes insufficient for the occasion where multi-channel transmission is required, and the audio transmission quality needs to be further enhanced.
Disclosure of Invention
Therefore, the embodiment of the invention provides a bluetooth audio signal transmission method to solve the problem that the prior art cannot realize audio signal interoperation based on wireless bluetooth, so that the communication efficiency and the communication quality are poor.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
in a first aspect, an embodiment of the present invention provides a bluetooth audio signal transmission method, including: constructing an RFCOMM communication channel and an HFP bidirectional transmission channel between the RFCOMM communication channel and a target device end; acquiring local audio data based on a preset microphone or a signal source, and converting the local audio data into a local digital audio signal; receiving HFP audio stream data sent by the target device side based on the HFP bidirectional transmission channel, and decoding the HFP audio stream data to obtain a remote user sound signal of the target device side; optimizing the local digital audio signal according to a preset rule, and outputting a local digital audio processing signal; processing the remote user sound signal according to a preset rule, and outputting a remote user sound processing signal; performing audio mixing processing on the local digital audio processing signal and the remote user sound processing signal, and outputting an audio mixing signal or a stereo sound mixing signal; encoding the audio mixing signal or the stereo audio mixing signal to obtain a first uplink audio transmission signal, and transmitting the first uplink audio transmission signal to the target device end by using the RFCOMM communication channel; and encoding the local digital audio processing signal while transmitting the first uplink audio transmission signal to obtain a second uplink audio transmission signal, and transmitting the second uplink audio transmission signal to the target device end by using the HFP bidirectional transmission channel.
Further, the bluetooth audio signal transmission method further includes: before the signals transmitted by the RFCOMM communication channel are subjected to sound mixing processing, whether the sampling rate of the local digital audio processing signals is the same as that of the remote user sound signals in HFP conversation is judged, if not, the local digital audio processing signals are subjected to resampling processing by using a preset resampling filter, and the local digital audio processing signals and the remote user sound signals are processed into the same sampling rate.
Further, the bluetooth audio signal transmission method further includes: when the audio data volume contained in the first uplink audio transmission signal is greater than or equal to a preset data volume threshold value, compressing the first uplink audio transmission signal in advance, and transmitting the compressed first uplink audio transmission signal to the target device end by using the RFCOMM communication channel; and/or the presence of a gas in the gas,
when the audio data amount contained in the second uplink audio transmission signal is greater than or equal to a preset data amount threshold value, the second uplink audio transmission signal is compressed in advance, and the compressed second uplink audio transmission signal is transmitted to the target device end by using the HFP bidirectional transmission channel.
Further, the bluetooth audio signal transmission method further includes: receiving an operation instruction signal input by a user based on a preset key touch receiving device; controlling local resources based on the operation instruction signal; or, the operation instruction signal is transmitted to the target device end through the RFCOMM communication channel, and the corresponding application program of the target device end is controlled.
Further, the bluetooth audio signal transmission method further includes: and sending the audio mixing signal or the stereo sound mixing signal to a preset sound playing device for playing while transmitting the first uplink audio transmission signal and/or the second uplink audio transmission signal to the target equipment end.
In a second aspect, an embodiment of the present invention further provides a bluetooth audio signal transmission apparatus, including: the Bluetooth connection unit is used for constructing an RFCOMM communication channel and an HFP bidirectional transmission channel between the Bluetooth connection unit and the target device end; the audio acquisition unit is used for acquiring local audio data based on a preset microphone or a signal source and converting the local audio data into a local digital audio signal; the HFP decoding unit is used for receiving HFP audio stream data sent by the target device side based on the HFP bidirectional transmission channel, decoding the HFP audio stream data and obtaining a remote user sound signal of the target device side; the audio processing unit is used for optimizing the local digital audio signal according to a preset rule and outputting a local digital audio processing signal; processing the remote user sound signal according to a preset rule, and outputting a remote user sound processing signal; performing audio mixing processing on the local digital audio processing signal and the remote user sound processing signal, and outputting an audio mixing signal or a stereo sound mixing signal; an audio encoding unit, configured to perform encoding processing on the audio mixing signal or the stereo audio mixing signal to obtain a first uplink audio transmission signal, and transmit the first uplink audio transmission signal to the target device end by using the RFCOMM communication channel; an HFP encoding unit, configured to perform encoding processing on the local digital audio processing signal while transmitting the first uplink audio transmission signal, to obtain a second uplink audio transmission signal, and transmit the second uplink audio transmission signal to the target device end by using the HFP bidirectional transmission channel.
Further, the bluetooth audio signal transmission device further includes: the sampling processing unit is used for judging whether the sampling rate of the local digital audio processing signal is the same as that of the remote user sound signal in the HFP conversation before performing sound mixing processing on the signal transmitted by the RFCOMM communication channel, and if not, performing resampling processing on the local digital audio processing signal by using a preset resampling filter to process the local digital audio processing signal and the remote user sound signal into the same sampling rate.
Further, the bluetooth audio signal transmission device further includes: the first compression processing unit is used for compressing the first uplink audio transmission signal in advance when the audio data amount contained in the first uplink audio transmission signal is greater than or equal to a preset data amount threshold value, and transmitting the compressed first uplink audio transmission signal to the target device end by using the RFCOMM communication channel; and/or the second compression processing unit is configured to, when the audio data amount included in the second uplink audio transmission signal is greater than or equal to a preset data amount threshold, compress the second uplink audio transmission signal in advance, and transmit the compressed second uplink audio transmission signal to the target device end by using the HFP bidirectional transmission channel.
Furthermore, the bluetooth audio signal transmission device, the audio acquisition unit, and the touch receiving device are configured to receive an operation instruction signal input by a user based on a preset key touch; the control unit is used for controlling local resources based on the operation instruction signal; or, the operation instruction signal is transmitted to the target device end through the RFCOMM communication channel, and the corresponding application program of the target device end is controlled.
Further, the bluetooth audio signal transmission device further includes: and the audio playing unit is used for transmitting the audio mixing signal or the stereo sound mixing signal to a preset sound playing device for playing while transmitting the first uplink audio transmission signal and/or the second uplink audio transmission signal to the target equipment end.
In a third aspect, an embodiment of the present invention further provides a bluetooth audio signal transmission method, including: respectively receiving a first uplink audio transmission signal and a second uplink audio transmission signal sent by an embedded Bluetooth device terminal based on a pre-constructed RFCOMM communication channel and a pre-constructed HFP bidirectional transmission channel; decoding the first uplink audio transmission signal to obtain a sound mixing signal or a stereo sound mixing signal; decoding the second uplink audio transmission signal to obtain a local digital audio signal of the embedded Bluetooth device end; respectively carrying out optimization processing on the sound mixing signal or the stereo sound mixing signal and the local digital audio signal to obtain target audio data; the target audio data comprise uploaded remote user sound signals and local audio signals of the embedded Bluetooth equipment terminal; and carrying out voice transcription processing on the target audio data to obtain text recording data.
In a fourth aspect, an embodiment of the present invention further provides a bluetooth audio signal transmission apparatus, including: the Bluetooth connection unit is used for respectively receiving a first uplink audio transmission signal and a second uplink audio transmission signal sent by the embedded Bluetooth device terminal based on a pre-constructed RFCOMM communication channel and a pre-constructed HFP bidirectional transmission channel; a data decoding unit, configured to perform decoding processing on the first uplink audio transmission signal to obtain an audio mixing signal or a stereo audio mixing signal; decoding the second uplink audio transmission signal to obtain a local digital audio signal of the embedded Bluetooth device end; the data processing unit is used for respectively carrying out optimization processing on the sound mixing signal or the stereo sound mixing signal and the local digital audio signal to obtain target audio data; the target audio data comprise uploaded remote user sound signals and local audio signals of the embedded Bluetooth equipment terminal; and the data presentation unit is used for carrying out voice transcription processing on the target audio data to obtain text recording data.
In a fifth aspect, an embodiment of the present invention further provides an electronic device, including: a processor; and the memory is used for storing a program of the Bluetooth audio signal transmission method, and after the electronic equipment is powered on and runs the program of the Bluetooth audio signal transmission method through the processor, the electronic equipment executes any one of the Bluetooth audio signal transmission methods.
In a sixth aspect, the present invention further provides a computer-readable storage medium, where the computer-readable storage medium contains one or more program instructions, and the one or more program instructions are used for a server to execute the method in any of the above bluetooth audio signal transmission methods.
By adopting the Bluetooth audio signal transmission method, the interoperability of back transmission, sound mixing, monitoring and playback and the like of the audio signal can be realized based on the wireless Bluetooth, the user is allowed to play music and share the music with the other party while making a call with a remote user, or the content of an important conversation is recorded with high quality, the transmission efficiency and the transmission quality of the audio signal are improved, and the use experience of the user is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
Fig. 1 is a flowchart of a first bluetooth audio signal transmission method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a first bluetooth audio signal transmission apparatus according to an embodiment of the present invention;
fig. 3 is a flowchart of a second bluetooth audio signal transmission method according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a second bluetooth audio signal transmission apparatus according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an electronic device according to an embodiment of the present invention;
fig. 6 is a schematic interaction diagram between an embedded bluetooth device and a target device in a bluetooth audio signal transmission method according to an embodiment of the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following describes an embodiment of the first bluetooth audio signal transmission method according to the present invention in detail. As shown in fig. 1, which is a flowchart of a first bluetooth audio signal transmission method according to an embodiment of the present invention, a specific implementation process includes the following steps:
step S101: an RFCOMM communication channel and an HFP bidirectional transmission channel are constructed between the RFCOMM communication channel and the target device.
In the embodiment of the invention, the embedded bluetooth device can construct an RFCOMM communication channel and an HFP bidirectional transmission channel with the target device. The target device end may refer to a mobile terminal matched with a bluetooth device, such as a smart phone, a notebook computer, and the like. The bluetooth device may refer to a bluetooth headset, a bluetooth sound, a bluetooth microphone, or the like, which is not limited herein.
The RFCOMM communication channel refers to a communication data transmission channel between the target device side and the bluetooth device, which is constructed based on an RFCOMM communication protocol, and the HFP bidirectional transmission channel refers to a communication data bidirectional transmission channel between the target device side and the bluetooth device, which is constructed based on an HFP session protocol. The RFCOMM protocol is a protocol based on bluetooth devices, where bluetooth defines a communication mode of a bottom layer radio frequency, a packet format of a data packet, a connection establishment mode (pairing mode) of a communication channel, and the like.The RFCOMM communication protocol is a serial linear simulation protocol based on the European Telecommunications standards institute ETSI07.10 protocol, which providesRS232Control and status signals, e.g.BasebandThe above corruption, CTS, and data signals, etc., provide the upper layer traffic (e.g., traditional serial cable applications) with transport capabilities. In addition, the RFCOMM protocol can also be created separately, not relying on the standard bluetooth protocols (such as A2DP, HFP, etc.) that are typically available with bluetooth devices. Here, "connect" means that pairing can be successfully performed and the communication channel connection required for RFCOMM is completed. It should be noted that the RFCOMM protocol is disclosed in the prior art, and is not described in detail herein.
Step S102: local audio data are collected based on a preset microphone or a signal source, and the local audio data are converted into local digital audio signals.
In an embodiment of the present invention, the local audio data may be collected from a predetermined microphone or audio source, and the microphone may be a local microphone of the bluetooth device or a wireless microphone receiver. In addition, in the actual implementation process, the audio data may also be read from a signal source such as an analog port, a digital port, or an audio file, and the specific implementation process includes, but is not limited to, the above-mentioned cases, which are not described in detail herein.
After the local audio data is collected, the local audio signal may be converted to a local digital audio signal. The local digital audio signal may be a PCM signal or a PDM signal, but is not limited to these two signals.
In addition, an operation instruction signal input by a user can be received based on a preset key touch receiving device, and local resources are controlled based on the operation instruction signal; or, the operation instruction signal is transmitted to the target device end through the RFCOMM communication channel, and an application program (such as audio playing software) corresponding to the target device end is controlled.
Step S103: and receiving HFP audio stream data sent by the target device side based on the HFP bidirectional transmission channel, and decoding to obtain a remote user sound signal of the target device side.
After the HFP bidirectional transmission channel with the target device side is constructed in the above step S101, the remote user sound signal of the target device side may be obtained by receiving and decoding the HFP audio stream data transmitted by the target device side based on the HFP bidirectional transmission channel in this step.
As shown in fig. 6, after the HFP session is initiated on the target device side (i.e., device 2), the target device side may establish a single-channel HFP bidirectional transmission channel with the embedded bluetooth device (i.e., device 1) through the bluetooth connection unit in the smart system. HFP audio data including but not limited to cvsd of 8khz and msbc of 16khz may be received and decoded at the embedded bluetooth device side based on the HFP bidirectional transmission channel. The remote user voice signal can be obtained through the decoding process, and the remote user voice signal can be transmitted to the audio processing unit for processing such as noise reduction.
Step S104: optimizing the local digital audio signal according to a preset rule, and outputting a local digital audio processing signal; processing the remote user sound signal according to a preset rule, and outputting a remote user sound processing signal; and carrying out sound mixing processing on the local digital audio processing signal and the remote user sound processing signal, and outputting a sound mixing signal or a stereo sound mixing signal.
After the local digital audio signal and the remote user audio signal at the target device end are obtained in step S102 and step S103, respectively, in this step, the local digital audio signal and the remote user audio signal may be processed, and further subjected to audio mixing processing, so as to output an audio mixing signal or a stereo audio mixing signal.
Specifically, the process of performing optimization processing on the local digital audio signal includes: processing the local digital audio signal in real time, such as: the processing is performed on a sample-by-sample basis (e.g., audio time-domain filtering) and may also be performed on a frame-by-frame basis (e.g., frequency-domain processing of the audio signal). In addition, the method may further include processing such as noise reduction, reverberation, and digital sound effect enhancement on the local digital audio signal collected by the microphone, and the optimization processing may also include simple gain adjustment processing, which is not specifically limited herein.
It should be noted that, in practical implementation, the processed local digital audio signal may be denoted as VLThe local digital audio signal VLMay be one of 8khz, 16khz, 44.1khz, 32khz or 48khz, so that the local digital audio signal VLMay be different from the sampling rate specified for the HFP session. Therefore, before the signals transmitted by the RFCOMM communication channel are mixed, it is necessary to determine whether the sampling rate of the local digital audio processing signal is the same as the sampling rate of the remote user sound signal in the HFP session, and if not, the local digital audio processing signal is resampled by using a preset resampling filter, so that the local digital audio processing signal and the remote user sound signal are processed to have the same sampling rate, thereby facilitating the transmission of the local digital audio signal to the remote user. Wherein the sampling rate refers to the frequency of sampling. The local digital audio signal and the remote user sound signal are processed to have the same sampling rate, specifically, the sampling rate may be synchronized with the sampling rate of the local digital audio signal, that is: 8khz, 16khz, 44.1khz, 32khz, or 48khz, etc.; it is also possible to synchronize to the sampling rate of the remote user sound signal, i.e.: 16khz or 8khz, etc., and is not particularly limited herein.
In addition, the process of performing signal processing on the remote user sound signal according to a preset rule comprises signal processing such as noise reduction and gain. The remote user sound signal can be recorded as VR. Further, for the interoperation of RFCOMM and HFP, the received remote user sound signal V can be further processedRAnd local digital audio data VLAnd performing sound mixing processing. In particular, the two signals are adjusted to the same sampling rate before mixing, e.g. the remote user audio signal VRUsually 8khz or 16khz, and locally acquired local digital audio data VLTypically 44.1khz or 48khz, where V may be chosen to facilitate the transmission of audio signals to a remote userRUpsampling to V by resampling filterLThe signals with the same sampling rate are mixed. Obtaining the mixed sound signal as VM ═ a × VL+b*VROr can be mixed into stereo sound mixing signal<VML，VMR>Wherein, VML＝a*VL+(1-a)*VR，VMR＝(1-a)*VL+a*VR. Wherein a and b may be numbers having an absolute value of 0 or more and 1 or less. The advantage of mixing stereo mixed sound signals is that such sounds are more comfortable to listen to during playback monitoring, and in addition, such multi-channel sounds are more convenient and efficient when being transmitted to a mobile phone for speech intelligent recognition. Such as: the user realizes the recording of the important telephone based on the method and realizes the identification of the conversation content through the intelligent voice identification system, and the signal with a stereo structure can distinguish which language is spoken by the remote user and which language is spoken by the local user more easily, thereby greatly improving the identification efficiency. And the output of the mixed sound signal has the advantages that: if the user wears the earphone to make a call, the earphone can insulate the ear of the user to a certain extent, so that the user can feel more comfortable if the user makes a call with the mixed sound of the user's own voice and the voice of the remote user.
Step S105: and encoding the audio mixing signal or the stereo audio mixing signal to obtain a first uplink audio transmission signal, and transmitting the first uplink audio transmission signal to the target equipment end by using the RFCOMM communication channel.
After the local digital audio signal is optimized in the step S104 to obtain a local digital audio processing signal and a mixed audio signal or a stereo audio mixed signal is output, in this step, encoding processing may be performed to obtain a first uplink audio transmission signal, and the first uplink audio transmission signal is transmitted to the target device end by using the RFCOMM communication channel.
In a specific implementation process, since the bandwidth of the RFCOMM communication channel is limited, when the audio data amount included in the first uplink audio transmission signal is greater than or equal to a preset data amount threshold, the first uplink audio transmission signal is compressed in advance, and the first uplink audio transmission signal after being compressed is transmitted to the target device end by using the RFCOMM communication channel.
Step S106: and encoding the local digital audio processing signal while transmitting the first uplink audio transmission signal to obtain a second uplink audio transmission signal, and transmitting the second uplink audio transmission signal to the target device end by using the HFP bidirectional transmission channel.
In step S105, while the first uplink audio transmission signal is transmitted, in this step, the local digital audio processing signal may be encoded to obtain a second uplink audio transmission signal, and the second uplink audio transmission signal is transmitted to the target device end by using the HFP bidirectional transmission channel.
In a specific implementation process, since the bandwidth of the RFCOMM communication channel is limited, when the audio data amount included in the second uplink audio transmission signal is greater than or equal to a preset data amount threshold, the second uplink audio transmission signal is compressed in advance, and the compressed second uplink audio transmission signal is transmitted to the target device end by using the HFP bidirectional transmission channel.
As shown in fig. 6, in the embodiment of the present invention, the processed mixed sound signal VM or stereo sound mixed sound signal may be processed as described above<VML，VMR>The encoding is carried out and transmitted to the device 2 side through an RFCOMM communication channel between the device 1 and the device 2. Of course, the transmission signal may also be configured by applying at least one of the original microphone signal to be transmitted, the processed microphone signal and the remotely transmitted audio signal. It should be noted that, because the bandwidth of the RFCOMM communication channel is limited, when the audio data size is large, encoding compression is required, and the control instruction with small data size may be directly put into the RFCOMM communication channel for transmission without compression, so as to control the application program in the device 2 or the device 2 on the other end. Compared with the traditional technology, the RFCOMM technology has great improvement on the transmission of audio and can support stereoTransmission of an audio mixing signal or a multi-channel audio signal.
Before transmission, encoding of stereo sound mixing signals is also needed, and the RFCOMM supports stereo encoders such as SBC, AAC, OPUS, and the like, although more stereo encoders may be included, and are not limited in this respect. These processed stereo audio and sound signals are encoded on a frame-by-frame basis and then transmitted. In the implementation process, a bluetooth packet may contain one frame of data or multiple frames of data according to the design of the application. The difference from the conventional bluetooth audio data transmission is that the conventional bluetooth can only realize the transmission of an uplink signal through HFP and is a single-channel 16khz or 8khz sampling signal, while the technical scheme disclosed by the invention can transmit stereo or multi-channel audio with a sampling rate of 44.1khz, 48khz or higher, so the quality of the transmitted signal is greatly improved, and on the other hand, the data uplink transmission is performed simultaneously with the HFP conversation.
In addition, the audio mixing signal or the stereo audio mixing signal can be sent to a preset sound playing device for playing while the first uplink audio transmission signal and/or the second uplink audio transmission signal are/is transmitted to the target device end. The sound playing device may refer to a speaker, an earphone, etc. in the bluetooth device.
By adopting the first bluetooth audio signal transmission method, the rf comm protocol and the HFP session service can form an interoperation based on the wireless bluetooth, and the interoperation means that the concurrent operation can be realized based on the two protocols on one hand, and the interoperation of the audio data based on the two protocols on the other hand, such as the interoperation of the back-transmission, the sound mixing, the monitoring and the playback of the audio signal and the like, improves the transmission efficiency and the transmission quality of the audio signal, thereby improving the use experience of a user. In the practical application process, for example, wireless high-quality karaoke or music reading and sharing can be realized, karaoke based on any third-party music content in a wireless mode can be realized, music reading and high-quality returning can be realized, a user can be allowed to play music while calling with a remote user to share the music with the other party, or the content of an important conversation can be recorded with high quality, but the two things can not be achieved under the traditional Bluetooth condition.
Corresponding to the first bluetooth audio signal transmission method, the invention also provides a first bluetooth audio signal transmission device. Since the embodiment of the apparatus is similar to the above-mentioned method embodiment, the description is relatively simple, and please refer to the description of the above-mentioned method embodiment, and the following description of the embodiment of the first bluetooth audio signal transmission apparatus is only illustrative. Please refer to fig. 2, which is a schematic diagram of a first bluetooth audio signal transmission apparatus according to an embodiment of the present invention.
The first Bluetooth audio signal transmission device comprises the following parts:
and a bluetooth connection unit 201 for constructing an RFCOMM communication channel and an HFP bidirectional transmission channel with the target device.
In the embodiment of the present invention, the target device end may refer to a mobile terminal matched with a bluetooth device, such as a smart phone, a notebook computer, and the like. The bluetooth device may refer to a bluetooth headset, a bluetooth sound, a bluetooth microphone, or the like, which is not limited herein. The RFCOMM communication channel refers to a communication data transmission channel between the target device side and the bluetooth device, which is constructed based on an RFCOMM communication protocol, and the HFP bidirectional transmission channel refers to a communication data bidirectional transmission channel between the target device side and the bluetooth device, which is constructed based on an HFP session protocol.
The audio acquisition unit 202 is configured to acquire local audio data based on a preset microphone or a signal source, and convert the local audio data into a local digital audio signal.
In the embodiment of the present invention, the audio acquisition unit 202 may acquire local audio data from a preset microphone or an audio source, where the microphone may be a local microphone of a bluetooth device or a wireless microphone receiver. In addition, in the actual implementation process, the audio data may also be read from a signal source such as an analog port, a digital port, or an audio file, and the specific implementation process includes, but is not limited to, the above-mentioned cases, which are not described in detail herein.
In addition, the audio acquisition unit 202 may also receive an operation instruction signal input by a user based on a preset key touch receiving device, and control a local resource based on the operation instruction signal; or, the operation instruction signal is transmitted to the target device end through the RFCOMM communication channel, and an application program (such as audio playing software) corresponding to the target device end is controlled.
An HFP decoding unit 203, configured to receive HFP audio stream data sent by the target device side based on the HFP bidirectional transmission channel, and decode the HFP audio stream data to obtain a remote user sound signal of the target device side.
Specifically, the process of performing optimization processing on the local digital audio signal includes: processing the local digital audio signal in real time, such as: the processing is performed on a sample-by-sample basis (e.g., audio time-domain filtering) and may also be performed on a frame-by-frame basis (e.g., frequency-domain processing of the audio signal). In addition, the method may further include processing such as noise reduction, reverberation, and digital sound effect enhancement on the local digital audio signal collected by the microphone, and the optimization processing may also include simple gain adjustment processing, which is not specifically limited herein. In addition, the process of performing signal processing on the remote user sound signal according to a preset rule comprises signal processing such as noise reduction and gain. The remote user sound signal can be recorded as VR. Further, for the interoperation of RFCOMM and HFP, the received remote user sound signal V can be further processedRAnd local digital audio data VLAnd performing sound mixing processing.
The audio processing unit 204 is configured to perform optimization processing on the local digital audio signal according to a preset rule, and output a local digital audio processing signal; processing the remote user sound signal according to a preset rule, and outputting a remote user sound processing signal; and carrying out sound mixing processing on the local digital audio processing signal and the remote user sound processing signal, and outputting a sound mixing signal or a stereo sound mixing signal.
In a specific implementation process, since the bandwidth of the RFCOMM communication channel is limited, when the audio data amount included in the first uplink audio transmission signal is greater than or equal to a preset data amount threshold, the first uplink audio transmission signal is compressed in advance, and the first uplink audio transmission signal after being compressed is transmitted to the target device end by using the RFCOMM communication channel.
It should be noted that the audio processing unit 204 has three output signals, one of which is V2LTransmitting the HFP conversation channel code to the target device end and transmitting the HFP conversation channel code to a remote end through a network; the second path is a mixed sound signal VM of a local audio signal and a remote user sound signal or a stereo sound mixed sound signal<VML，VMR>Sending the audio data to a local audio playing unit for subsequent playing; and the third path is to send the local microphone signal, the local microphone processing signal or the mixed sound signal to an RFCOMM audio coding unit for coding and send the coded signal back to the target device end to generate text recording data, thereby realizing the recording of the conversation.
An audio encoding unit 205, configured to perform encoding processing on the audio mixing signal or the stereo audio mixing signal to obtain a first uplink audio transmission signal, and transmit the first uplink audio transmission signal to the target device end by using the RFCOMM communication channel.
In a specific implementation process, since the bandwidth of the RFCOMM communication channel is limited, when the audio data amount included in the first uplink audio transmission signal is greater than or equal to a preset data amount threshold, the first uplink audio transmission signal is compressed in advance, and the first uplink audio transmission signal after being compressed is transmitted to the target device end by using the RFCOMM communication channel.
An HFP encoding unit 206, configured to perform encoding processing on the local digital audio processing signal while transmitting the first uplink audio transmission signal, to obtain a second uplink audio transmission signal, and transmit the second uplink audio transmission signal to the target device end by using the HFP bidirectional transmission channel.
In a specific implementation process, since the bandwidth of the RFCOMM communication channel is limited, when the audio data amount included in the second uplink audio transmission signal is greater than or equal to a preset data amount threshold, the second uplink audio transmission signal is compressed in advance, and the compressed second uplink audio transmission signal is transmitted to the target device end by using the HFP bidirectional transmission channel.
By adopting the first Bluetooth audio signal transmission device, the interoperability of back transmission, sound mixing, monitoring and playback and the like of audio signals can be realized based on wireless Bluetooth, the transmission efficiency and the transmission quality of the audio signals are improved, and the use experience of a user is improved.
Corresponding to the first Bluetooth audio signal transmission method and device, the invention also provides a second Bluetooth audio signal transmission method and device. Since the method and apparatus are similar to the above-mentioned method and apparatus embodiments, the description is simple, and please refer to the description of the above-mentioned first method and apparatus embodiment, and the following description of the second bluetooth audio signal transmission method and apparatus is only illustrative. Fig. 3 and 4 are a flowchart and a schematic diagram of a second bluetooth audio signal transmission method and apparatus according to an embodiment of the present invention, respectively.
The second bluetooth audio signal transmission method of the invention specifically comprises the following steps:
step S301: the method comprises the steps of receiving a first uplink audio transmission signal and a second uplink audio transmission signal sent by an embedded Bluetooth device terminal respectively based on a pre-constructed RFCOMM communication channel and a pre-constructed HFP bidirectional transmission channel.
Step S302: decoding the first uplink audio transmission signal to obtain a sound mixing signal or a stereo sound mixing signal; and decoding the second uplink audio transmission signal to obtain a local digital audio signal of the embedded Bluetooth equipment terminal.
Step S303: respectively carrying out optimization processing on the sound mixing signal or the stereo sound mixing signal and the local digital audio signal to obtain target audio data; the target audio data comprise uploaded remote user sound signals and local audio signals of the embedded Bluetooth device.
Step S304: and carrying out voice transcription processing on the target audio data to obtain text recording data.
In the embodiment of the present invention, the target device analyzes the data packet transmitted over the RFCOMM communication channel and the HFP bidirectional transmission channel, and when the data packet is control information, the data packet is directly converted into a characteristic operation on the target device, such as a call hang-up or a call answering. Of course, the user may also control the embedded device on the interface of the application program, such as controlling and adjusting the volume, pausing the playing or starting the playing, and the like. The received data packet is decoded to obtain audio data, post-processing can be performed, such as noise reduction, digital sound effect and the like, voice intelligent transcription can be performed to generate text record data, so that the summary of telephone conversations is convenient to realize, the voice intelligent transcription can be independently completed on an intelligent terminal or completed in a networking mode, and the method is not limited specifically herein.
By adopting the second Bluetooth audio signal transmission method, the interoperability of back transmission, sound mixing, monitoring and playback and the like of the audio signals can be realized based on the wireless Bluetooth, so that a user can play music and share the music with the other party while making a call with a remote user, or the content of an important conversation is recorded with high quality, the transmission efficiency and the transmission quality of the audio signals are improved, and the use experience of the user is improved.
The second bluetooth audio signal transmission device of the invention comprises the following parts:
the bluetooth connection unit 401 is configured to receive a first uplink audio transmission signal and a second uplink audio transmission signal sent by the embedded bluetooth device side based on a pre-constructed RFCOMM communication channel and an HFP bidirectional transmission channel, respectively.
A data decoding unit 402, configured to perform decoding processing on the first uplink audio transmission signal to obtain an audio mixing signal or a stereo audio mixing signal; and decoding the second uplink audio transmission signal to obtain a local digital audio signal of the embedded Bluetooth equipment terminal.
A data processing unit 403, configured to perform optimization processing on the audio mixing signal or the stereo audio mixing signal and the local digital audio signal, respectively, to obtain target audio data; the target audio data comprise uploaded remote user sound signals and local audio signals of the embedded Bluetooth device.
And a data presentation unit 404, configured to perform voice transcription processing on the target audio data to obtain text recording data.
By adopting the second Bluetooth audio signal transmission device, disclosed by the invention, the interoperability of back transmission, sound mixing, monitoring and playback and the like of audio signals can be realized based on wireless Bluetooth, so that a user can play music and share the music with the other party while making a call with a remote user, or the content of an important conversation is recorded with high quality, the transmission efficiency and the transmission quality of the audio signals are improved, and the use experience of the user is improved.
Corresponding to the two Bluetooth audio signal transmission methods, the invention also provides electronic equipment realized based on the Bluetooth audio signal transmission method. Since the embodiment of the electronic device is similar to the above method embodiment, the description is relatively simple, and please refer to the description of the above method embodiment, and the electronic device described below is only schematic. Fig. 5 is a schematic view of an electronic device according to the present invention.
An electronic device according to the present invention includes:
a processor 301 and a memory 302; the memory is used for storing a program 303 of a bluetooth audio signal transmission method, and the electronic device executes any one of the above bluetooth audio signal transmission methods after being powered on and running the program 303 of the bluetooth audio signal transmission method through the processor 301.
In addition, the invention also provides a computer storage medium corresponding to the Bluetooth audio signal transmission method. Since the embodiment of the computer storage medium is similar to the above method embodiment, the description is simple, and please refer to the description of the above method embodiment, and the computer storage medium described below is only schematic.
The computer storage medium contains one or more program instructions for the server to perform the bluetooth audio signal transmission method described above.
In an embodiment of the present invention, the processor or the processing module may be an integrated circuit chip having signal processing capability. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The processor reads the information in the storage medium and completes the steps of the method in combination with the hardware.
The storage medium may be a memory, for example, which may be volatile memory or nonvolatile memory, or which may include both volatile and nonvolatile memory.
The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory.
The volatile Memory may be a Random Access Memory (RAM) which serves as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (ddr Data Rate SDRAM), Enhanced SDRAM (ESDRAM), synclink DRAM (SLDRAM), and Direct memory bus RAM (DRRAM).
The storage media described in connection with the embodiments of the invention are intended to comprise, without being limited to, these and any other suitable types of memory.
Those skilled in the art will appreciate that the functionality described in the present invention may be implemented in a combination of hardware and software in one or more of the examples described above. When software is applied, the corresponding functionality may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for bluetooth audio signal transmission, comprising:
constructing an RFCOMM communication channel and an HFP bidirectional transmission channel between the RFCOMM communication channel and a target device end;
acquiring local audio data based on a preset microphone or a signal source, and converting the local audio data into a local digital audio signal;
receiving HFP audio stream data sent by the target device side based on the HFP bidirectional transmission channel, and decoding the HFP audio stream data to obtain a remote user sound signal of the target device side;
optimizing the local digital audio signal according to a preset rule, and outputting a local digital audio processing signal; processing the remote user sound signal according to a preset rule, and outputting a remote user sound processing signal; performing audio mixing processing on the local digital audio processing signal and the remote user sound processing signal, and outputting an audio mixing signal or a stereo sound mixing signal;
encoding the audio mixing signal or the stereo audio mixing signal to obtain a first uplink audio transmission signal, and transmitting the first uplink audio transmission signal to the target device end by using the RFCOMM communication channel;
and encoding the local digital audio processing signal while transmitting the first uplink audio transmission signal to obtain a second uplink audio transmission signal, and transmitting the second uplink audio transmission signal to the target device end by using the HFP bidirectional transmission channel.
2. The bluetooth audio signal transmission method according to claim 1, further comprising: before the signals transmitted by the RFCOMM communication channel are subjected to sound mixing processing, whether the sampling rate of the local digital audio processing signals is the same as that of the remote user sound signals in HFP conversation is judged, if not, the local digital audio processing signals are subjected to resampling processing by using a preset resampling filter, and the local digital audio processing signals and the remote user sound signals are processed into the same sampling rate.
3. The bluetooth audio signal transmission method according to claim 1, further comprising:
when the audio data volume contained in the first uplink audio transmission signal is greater than or equal to a preset data volume threshold value, compressing the first uplink audio transmission signal in advance, and transmitting the compressed first uplink audio transmission signal to the target device end by using the RFCOMM communication channel; and/or the presence of a gas in the gas,
when the audio data amount contained in the second uplink audio transmission signal is greater than or equal to a preset data amount threshold value, the second uplink audio transmission signal is compressed in advance, and the compressed second uplink audio transmission signal is transmitted to the target device end by using the HFP bidirectional transmission channel.
4. The bluetooth audio signal transmission method according to claim 1, further comprising:
receiving an operation instruction signal input by a user based on a preset key touch receiving device;
controlling local resources based on the operation instruction signal; alternatively, the first and second electrodes may be,
and transmitting the operation instruction signal to the target device end through the RFCOMM communication channel, and controlling an application program corresponding to the target device end.
5. The bluetooth audio signal transmission method according to claim 1, further comprising: and sending the audio mixing signal or the stereo sound mixing signal to a preset sound playing device for playing while transmitting the first uplink audio transmission signal and/or the second uplink audio transmission signal to the target equipment end.
6. A bluetooth audio signal transmission device, comprising:
the Bluetooth connection unit is used for constructing an RFCOMM communication channel and an HFP bidirectional transmission channel between the Bluetooth connection unit and the target device end;
the audio acquisition unit is used for acquiring local audio data based on a preset microphone or a signal source and converting the local audio data into a local digital audio signal;
the HFP decoding unit is used for receiving HFP audio stream data sent by the target device side based on the HFP bidirectional transmission channel, decoding the HFP audio stream data and obtaining a remote user sound signal of the target device side;
the audio processing unit is used for optimizing the local digital audio signal according to a preset rule and outputting a local digital audio processing signal; processing the remote user sound signal according to a preset rule, and outputting a remote user sound processing signal; performing audio mixing processing on the local digital audio processing signal and the remote user sound processing signal, and outputting an audio mixing signal or a stereo sound mixing signal;
an audio encoding unit, configured to perform encoding processing on the audio mixing signal or the stereo audio mixing signal to obtain a first uplink audio transmission signal, and transmit the first uplink audio transmission signal to the target device end by using the RFCOMM communication channel;
an HFP encoding unit, configured to perform encoding processing on the local digital audio processing signal while transmitting the first uplink audio transmission signal, to obtain a second uplink audio transmission signal, and transmit the second uplink audio transmission signal to the target device end by using the HFP bidirectional transmission channel.
7. A method for bluetooth audio signal transmission, comprising:
respectively receiving a first uplink audio transmission signal and a second uplink audio transmission signal sent by an embedded Bluetooth device terminal based on a pre-constructed RFCOMM communication channel and a pre-constructed HFP bidirectional transmission channel;
decoding the first uplink audio transmission signal to obtain a sound mixing signal or a stereo sound mixing signal; decoding the second uplink audio transmission signal to obtain a local digital audio signal of the embedded Bluetooth device end;
respectively carrying out optimization processing on the sound mixing signal or the stereo sound mixing signal and the local digital audio signal to obtain target audio data; the target audio data comprise uploaded remote user sound signals and local audio signals of the embedded Bluetooth equipment terminal;
and carrying out voice transcription processing on the target audio data to obtain text recording data.
8. A bluetooth audio signal transmission device, comprising:
the Bluetooth connection unit is used for respectively receiving a first uplink audio transmission signal and a second uplink audio transmission signal sent by the embedded Bluetooth device terminal based on a pre-constructed RFCOMM communication channel and a pre-constructed HFP bidirectional transmission channel;
a data decoding unit, configured to perform decoding processing on the first uplink audio transmission signal to obtain an audio mixing signal or a stereo audio mixing signal; decoding the second uplink audio transmission signal to obtain a local digital audio signal of the embedded Bluetooth device end;
the data processing unit is used for respectively carrying out optimization processing on the sound mixing signal or the stereo sound mixing signal and the local digital audio signal to obtain target audio data; the target audio data comprise uploaded remote user sound signals and local audio signals of the embedded Bluetooth equipment terminal;
and the data presentation unit is used for carrying out voice transcription processing on the target audio data to obtain text recording data.
9. An electronic device, comprising:
a processor; and
a memory for storing a program of a bluetooth audio signal transmission method, the electronic device performing the bluetooth audio signal transmission method of any one of the above claims 1 to 5 or 7 after being powered on and running the program of the bluetooth audio signal transmission method through the processor.
10. A computer readable storage medium containing one or more program instructions for execution by a server of a bluetooth audio signal transmission method as claimed in any one of claims 1 to 5 or 7.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218165A1 (en) * | 2021-04-13 | 2022-10-20 | Oppo广东移动通信有限公司 | Method and apparatus for receiving audio data packet, method and apparatus for sending audio data packet, and electronic device |
| CN117880696A (en) * | 2022-10-12 | 2024-04-12 | 广州开得联软件技术有限公司 | Sound mixing method, device, computer equipment and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101714379A (en) * | 2008-10-08 | 2010-05-26 | 安凯（广州）软件技术有限公司 | Audio resampling method |
| US20190174557A1 (en) * | 2017-12-01 | 2019-06-06 | Bose Corporation | Wireless low-latency audio content sharing |
| CN110661907A (en) * | 2018-07-01 | 2020-01-07 | 张德明 | Bluetooth-based high-definition call recording method |
| CN110662204A (en) * | 2018-07-01 | 2020-01-07 | 张德明 | Music and voice transmission operation method based on Bluetooth |
-
2020
- 2020-01-17 CN CN202010054135.1A patent/CN111385780A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101714379A (en) * | 2008-10-08 | 2010-05-26 | 安凯（广州）软件技术有限公司 | Audio resampling method |
| US20190174557A1 (en) * | 2017-12-01 | 2019-06-06 | Bose Corporation | Wireless low-latency audio content sharing |
| CN110661907A (en) * | 2018-07-01 | 2020-01-07 | 张德明 | Bluetooth-based high-definition call recording method |
| CN110662204A (en) * | 2018-07-01 | 2020-01-07 | 张德明 | Music and voice transmission operation method based on Bluetooth |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218165A1 (en) * | 2021-04-13 | 2022-10-20 | Oppo广东移动通信有限公司 | Method and apparatus for receiving audio data packet, method and apparatus for sending audio data packet, and electronic device |
| CN117880696A (en) * | 2022-10-12 | 2024-04-12 | 广州开得联软件技术有限公司 | Sound mixing method, device, computer equipment and storage medium |
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