CN110366752B - Voice frequency division transmission method, source terminal, play terminal, source terminal circuit and play terminal circuit - Google Patents

Voice frequency division transmission method, source terminal, play terminal, source terminal circuit and play terminal circuit Download PDF

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Publication number
CN110366752B
CN110366752B CN201980000976.XA CN201980000976A CN110366752B CN 110366752 B CN110366752 B CN 110366752B CN 201980000976 A CN201980000976 A CN 201980000976A CN 110366752 B CN110366752 B CN 110366752B
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frequency band
voice signal
link
source
band voice
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CN110366752A (en
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郭仕林
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Shenzhen Goodix Technology Co Ltd
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Shenzhen Goodix Technology Co Ltd
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/0017—Lossless audio signal coding; Perfect reconstruction of coded audio signal by transmission of coding error
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing

Abstract

The application relates to the field of communication, in particular to a voice frequency division transmission method, a source end, a play end, a source end circuit and a play end circuit; a voice frequency division transmission method comprises the following steps: the source end encodes the first frequency band voice signal and the second frequency band voice signal; the source end marks the frame synchronization information into the encoded first frequency band voice signal and the encoded second frequency band voice signal; the source end respectively sends the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information to the playing end through the first synchronization link and the second synchronization link. The application respectively transmits the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information to the playing end through the first synchronization link and the second synchronization link, thereby solving the problem of tone quality reduction caused by the limitation of transmission bandwidth and the problem of affecting the playing audio when improving the tone quality.

Description

Voice frequency division transmission method, source terminal, play terminal, source terminal circuit and play terminal circuit
Technical Field
The present application relates to the field of communications, and in particular, to a voice frequency division transmission method, a source terminal, a play terminal, a source terminal circuit, and a play terminal circuit.
Background
In wireless audio transmission, due to the limitation of transmission bandwidth, the transmission is generally performed by using lossy coding with ultra-high compression rate while the endurance and the bandwidth are simultaneously considered, so that the tone quality is sacrificed and longer endurance time is obtained. Common lossy coding, for example: AAC (Advanced Audio Coding), SBC (Sub-band coding) or MP3 (Moving Picture Experts Group Audio Layer III, moving picture experts compression standard audio layer 3) coding, etc., usually discard the high frequency part directly to save bandwidth, but when the coded data is received, the original speech signal cannot be obtained due to the loss of the high frequency part, so that better speech quality experience cannot be provided for the user, and when a synchronous link is used to transmit the speech signal, the synchronous link is generally required to be operated to achieve the purpose of improving the speech quality, but this mode often affects the audio being played, for example, the user can hear the short pause phenomenon of the audio being played.
Disclosure of Invention
Aiming at the problem of tone quality reduction caused by transmission bandwidth limitation during wireless audio transmission and the problem of affecting playing audio during tone quality improvement in the prior art, the application provides a voice frequency division transmission method, a source terminal, a playing terminal, a source terminal circuit and a playing terminal circuit.
A first aspect of an embodiment of the present application provides a voice frequency division transmission method, including:
the source end encodes the first frequency band voice signal and the second frequency band voice signal; the source end marks the frame synchronization information into the encoded first frequency band voice signal and the encoded second frequency band voice signal; the source end respectively sends the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information to the playing end through the first synchronization link and the second synchronization link.
Further, with reference to the first aspect, in an implementation manner of the first aspect, the method includes: the compression rate of the coding mode of the second frequency band voice signal is higher than that of the first frequency band voice signal; or the compression rate of the coding mode of the second frequency band voice signal is lower than that of the coding mode of the first frequency band voice signal.
With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the encoding, by the source end, the second band speech signal includes:
the source end encodes the high-frequency voice signal, and the encoding mode of the source end for the high-frequency voice signal comprises a CELT encoding mode or an SBR encoding mode; or alternatively
The source end encodes the non-high frequency voice signal, and the encoding mode of the source end for the non-high frequency voice signal comprises a SILK encoding mode, an SBC encoding mode, an AAC encoding mode or an MP3 encoding mode.
In addition, with reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the marking, by the source end, frame synchronization information into the encoded first frequency band speech signal and the encoded second frequency band speech signal includes:
the source end marks the voice signal of any frequency band after being detected in the preset time delay as one frame of data, and the frame synchronization information comprises the starting time and the ending time of one frame of data.
In addition, with reference to the first aspect and the foregoing implementation manner of the first aspect, before the source end sends the encoded second frequency band voice signal with the frame synchronization information to the play end through the second synchronization link, the method includes:
Determining the used link parameters according to the link parameters supported by the playing end and sent by the playing end;
and the source end establishes a second synchronous link with the playing end according to the used link parameters.
In addition, with reference to the first aspect and the foregoing implementation manner of the first aspect, before determining the used link parameter according to the link parameter supported by the playing end and sent by the playing end, in another implementation manner of the first aspect, the method includes:
the source end sends a second synchronous link request to the playing end;
the source end receives a reply of the second synchronous link request;
the source end determines whether to establish the second synchronous link according to the reply of the second synchronous link request.
With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, before the source end encodes the second frequency band speech signal, the method further includes:
the source end judges whether the playing end supports voice frequency division transmission according to the control data stream, and the control data stream is transmitted through an asynchronous link.
In addition, with reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, if the source end identifies the voice frequency division transmission service through a custom Universal Unique Identifier (UUID), the source end judges whether the play end supports the voice frequency division transmission according to the control data stream, including:
The control data stream comprises a value of a custom UUID, and if the value of the custom UUID of the playing end received by the source end is equal to a preset UUID value, the source end determines that the playing end supports voice frequency division transmission.
In addition, with reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, if the source end determines that the playing end supports voice frequency division transmission according to the control data stream, the source end sends an audio configuration parameter request to the playing end;
the source end receives audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end, wherein the audio configuration parameters comprise coding and decoding parameters and code rates, and the coding and decoding parameters comprise one or two of a coding mode and a decoding mode;
the source end determines the used audio configuration parameters according to the audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end and sends the used audio configuration parameters to the playing end.
In addition, with reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the number of second synchronous links is less than or equal to the number of frequency bands of the second frequency band voice signal;
the source end disconnects one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links; or alternatively
And the source end establishes one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links.
A second aspect of an embodiment of the present application provides a voice frequency division transmission method, including:
the playing end receives the coded first frequency band voice signal with the frame synchronization information and the coded second frequency band voice signal with the frame synchronization information through the first synchronization link and the second synchronization link respectively;
the playing end decodes the received first frequency band voice signal and the received second frequency band voice signal;
the playing end synchronizes the decoded first frequency band voice signal and the decoded second frequency band voice signal through the frame synchronization information.
In addition, with reference to the second aspect, in an implementation manner of the second aspect, after the playing end synchronizes the decoded first frequency band speech signal and the decoded second frequency band speech signal through the frame synchronization information, the method includes:
the playing end respectively carries out digital-to-analog conversion on the synchronized first frequency band voice signal and the synchronized second frequency band voice signal through one or more different digital-to-analog converters;
the playing end respectively amplifies the first frequency band voice signal after digital-to-analog conversion and the second frequency band voice signal after digital-to-analog conversion through one or more different amplifiers;
The playing end performs electroacoustic conversion on the amplified first frequency band voice signal and the amplified second frequency band voice signal through one or more different electroacoustic converters respectively.
In addition, with reference to the second aspect and the foregoing implementation manner of the second aspect, in another implementation manner of the second aspect, before the receiving, by the playing end, the encoded second frequency band speech signal with the frame synchronization information through the second synchronization link, the method includes:
the playing end sends the control data stream to the source end so that the source end judges whether the playing end supports voice frequency division transmission or not according to the control data stream.
In addition, with reference to the second aspect and the foregoing implementation manner of the second aspect, in another implementation manner of the second aspect, if the source end determines that the play end supports voice frequency division transmission according to the control data stream, the play end receives a second synchronous link request sent by the source end and sends a reply of the second synchronous link request;
if the playing end supports voice frequency division transmission, the playing end sends the link parameters supported by the playing end to the source end.
In addition, with reference to the second aspect and the foregoing implementation manner of the second aspect, before the playing end receives the second synchronous link request sent by the source end, the method includes:
The playing end receives an audio configuration parameter request sent by the source end;
the playing end sends audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end to the source end;
the playing end receives the used audio configuration parameters sent by the source end and configures the used audio configuration parameters.
In addition, with reference to the second aspect and the foregoing implementation manner of the second aspect, in another implementation manner of the second aspect, the playing end disconnects one or more second synchronous links according to an electric quantity condition or link quality of the second synchronous links; or alternatively
The playing end establishes one or more second synchronous links according to the electric quantity condition or the link quality request source end of the second synchronous links.
A third aspect of an embodiment of the present application provides a source for voice frequency division transmission, the source comprising:
the coding module is used for coding the first frequency band voice signal and the second frequency band voice signal;
the pre-synchronization module is used for marking the frame synchronization information into the encoded first frequency band voice signal and the encoded second frequency band voice signal; and
the first sending module is used for respectively sending the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information to the playing end through the first synchronization link and the second synchronization link.
In addition, with reference to the third aspect, in an implementation manner of the third aspect, a compression rate of a coding manner of the second frequency band speech signal is higher than a compression rate of a coding manner of the first frequency band speech signal; or alternatively
The compression rate of the coding mode of the second frequency band voice signal is lower than that of the first frequency band voice signal.
With reference to the third aspect and the foregoing implementation manner of the third aspect, in another implementation manner of the third aspect, the encoding module includes:
the high-frequency coding module is used for coding the high-frequency voice signals, and the coding mode of the high-frequency voice signals comprises a CELT coding mode or an SBR coding mode; or alternatively
The non-high frequency coding module is used for coding the non-high frequency voice signals, and the coding mode of the non-high frequency voice signals comprises a SILK coding mode, an SBC coding mode, an AAC coding mode or an MP3 coding mode.
With reference to the third aspect and the foregoing implementation manner of the third aspect, in another implementation manner of the third aspect, the pre-synchronization module includes:
the data frame marking module is used for marking the voice signal of any frequency band after being detected in the preset time delay as one frame of data, and the frame synchronization information comprises the starting time and the ending time of one frame of data.
With reference to the third aspect and the foregoing implementation manner of the third aspect, in another implementation manner of the third aspect, the source end further includes:
the first transmitting module is used for determining the used link parameters according to the link parameters supported by the playing end and transmitted by the playing end before transmitting the encoded second frequency band voice signals with the frame synchronization information to the playing end through the second synchronous link;
and the link establishment module is used for establishing a second synchronous link with the playing end according to the used link parameters.
With reference to the third aspect and the foregoing implementation manner of the third aspect, in another implementation manner of the third aspect, the source end further includes:
the first parameter determining module is used for sending a first synchronous link request to the playing end before determining the used link parameters according to the link parameters supported by the playing end and sent by the playing end; and
the first receiving module is used for receiving a reply of the second synchronous link request;
the first parameter determining module is further configured to determine whether to establish the second synchronous link according to a reply of the second synchronous link request.
With reference to the third aspect and the foregoing implementation manner of the third aspect, in another implementation manner of the third aspect, the source end further includes:
The first judging module is used for judging whether the playing end supports voice frequency division transmission or not according to the control data stream before the encoding module encodes the voice signal in the second frequency band, and the control data stream is transmitted through an asynchronous link.
With reference to the third aspect and the foregoing implementation manner of the third aspect, in another implementation manner of the third aspect, the source end further includes a UUID module, configured to identify the voice frequency division transmission service by using a custom universal unique identification code (UUID);
the first judging module includes:
and the second judging module is used for controlling the data stream to comprise the value of the custom UUID, and if the received value of the custom UUID of the playing end is equal to the preset UUID value, the second judging module is used for determining that the playing end supports voice frequency division transmission.
With reference to the third aspect and the foregoing implementation manner of the third aspect, in another implementation manner of the third aspect, the source end further includes:
and a third sending module: if the first judging module determines that the playing end supports voice frequency division transmission according to the control data stream, the first judging module is used for sending an audio configuration parameter request to the playing end;
and a second receiving module: the audio configuration parameters are used for receiving audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end, the audio configuration parameters comprise coding and decoding parameters and code rates, and the coding and decoding parameters comprise one or two of a coding mode and a decoding mode; and
The second parameter determining module is used for determining the used audio configuration parameters according to the audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end;
the third sending module is further configured to send the used audio configuration parameter to the playing end.
With reference to the third aspect and the foregoing implementation manner of the third aspect, in another implementation manner of the third aspect, the source end further includes:
the first transmission control module is used for disconnecting one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links, and the number of the second synchronous links is smaller than or equal to the frequency band number of the second frequency band voice signals; or alternatively
The first transmission control module is further configured to establish one or more second synchronous links according to an electric quantity condition or link quality of the second synchronous links, where the number of the second synchronous links is less than or equal to the number of frequency bands of the second frequency band voice signal.
A fourth aspect of an embodiment of the present application provides a playback end for voice crossover transmission, where the playback end includes:
the third receiving module is used for respectively receiving the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information through the first synchronization link and the second synchronization link;
The decoding module is used for decoding the received encoded first frequency band voice signal and the encoded second frequency band voice signal;
and the synchronization module is used for synchronizing the decoded first frequency band voice signal and the decoded second frequency band voice signal through the frame synchronization information.
With reference to the fourth aspect, in an implementation manner of the fourth aspect, the playing end further includes:
the digital-to-analog conversion module is used for respectively carrying out digital-to-analog conversion on the synchronized first frequency band voice signal and the synchronized second frequency band voice signal;
the one or more different amplifying modules are used for amplifying the first frequency band voice signals and the second frequency band voice signals after digital-to-analog conversion respectively; and
and the one or more different electroacoustic conversion modules are used for respectively electroacoustic converting the amplified first frequency band voice signals and the amplified second frequency band voice signals.
With reference to the fourth aspect and the foregoing implementation manner of the fourth aspect, in another implementation manner of the fourth aspect, the playing end further includes:
and the fourth sending module is used for sending a control data stream to the source end before the third receiving module receives the encoded second frequency band voice signal with the frame synchronization information through the second synchronous link, so that the source end judges whether the playing end supports voice frequency division transmission according to the control data stream.
With reference to the fourth aspect and the foregoing implementation manner of the fourth aspect, in another implementation manner of the fourth aspect, the playing end further includes:
a fourth receiving module, configured to receive a second synchronization link request sent by the source end if the source end determines that the play end supports voice frequency division transmission according to the control data stream; and
a fifth sending module, configured to send a reply of the second synchronous link request;
if the playing end supports voice frequency division transmission, the fifth sending module is further used for sending the link parameters supported by the playing end to the source end.
With reference to the fourth aspect and the foregoing implementation manner of the fourth aspect, in another implementation manner of the fourth aspect, the playing end further includes:
the fifth receiving module is used for receiving an audio configuration parameter request sent by the source end before the fourth receiving module receives the second synchronous link request sent by the source end;
a sixth sending module, configured to send audio configuration parameters corresponding to the second frequency band voice signal supported by the playing end to the source end;
the fifth receiving module is further configured to receive the used audio configuration parameter sent by the source end; and
and the parameter configuration module is used for configuring the used audio configuration parameters.
With reference to the fourth aspect and the foregoing implementation manner of the fourth aspect, in another implementation manner of the fourth aspect, the playing end further includes:
The second transmission control module is used for disconnecting one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links; or alternatively
The second transmission control module is further configured to establish one or more second synchronous links according to the power condition or the link quality request source end of the second synchronous link.
A fifth aspect of an embodiment of the present application provides a source terminal for voice frequency division transmission, including: a memory and a processor;
the memory is coupled with the processor;
a memory for storing program instructions;
and the processor is used for calling the program instructions stored in the memory to enable the source end to execute the voice frequency division transmission method in the first aspect.
A sixth aspect of an embodiment of the present application provides a playback end, for voice frequency division transmission, including: a memory and a processor;
the memory is coupled with the processor;
a memory for storing program instructions;
and the processor is used for calling the program instructions stored in the memory to enable the playing end to execute the voice frequency division transmission method in the second aspect.
A seventh aspect of embodiments of the present application provides a computer-readable storage medium comprising: a computer program is stored thereon, which when executed by a processor implements the voice frequency division transmission method according to the first aspect described above.
An eighth aspect of an embodiment of the present application provides a computer-readable storage medium comprising: a computer program stored thereon, wherein the computer program, when executed by a processor, implements the voice frequency division transmission method according to the second aspect described above.
A ninth aspect of an embodiment of the present application provides a source side circuit, including:
an encoder for encoding the first frequency band speech signal and the second frequency band speech signal; and
and the source end controller is connected with the encoder and is used for respectively transmitting the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information to the playing end circuit through the first synchronization link and the second synchronization link.
In addition, with reference to the ninth aspect, in an implementation manner of the ninth aspect, the source side circuit further includes a filter, where the filter is connected to the encoder, and is configured to separate the first frequency band speech signal and the second frequency band speech signal.
A tenth aspect of an embodiment of the present application provides a playback-side circuit, including:
a playing end controller for receiving the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information through a first synchronization link and a second synchronization link respectively; and
And the decoder is connected with the play end controller and used for decoding the received first frequency band voice signal and the received second frequency band voice signal.
With reference to the tenth aspect, in an implementation manner of the tenth aspect, the playing side circuit further includes:
one or more different digital-to-analog converters respectively connected with the decoder and used for respectively performing digital-to-analog conversion on the decoded first frequency band voice signal and the decoded second frequency band voice signal;
the one or more different amplifiers are respectively connected with the one or more digital-to-analog converters and are used for respectively amplifying the digital-to-analog converted first frequency band voice signals and the digital-to-analog converted second frequency band voice signals; and
and the one or more different electroacoustic converters are respectively connected with the one or more amplifiers and are used for respectively electroacoustic converting the amplified first frequency band voice signals and the amplified second frequency band voice signals.
Compared with the prior art, the embodiment of the application has the beneficial effects that: the embodiment of the application provides a voice frequency division transmission method, a source end, a play end, a source end circuit and a play end circuit, which respectively send a coded first frequency band voice signal with frame synchronization information and a coded second frequency band voice signal with frame synchronization information to the play end through a first synchronization link and a second synchronization link, thereby solving the problem of tone quality reduction caused by transmission bandwidth limitation and the problem of affecting playing audio when improving tone quality.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a flowchart of a voice frequency division transmission method according to an embodiment of the present application;
FIG. 2 is a flowchart of a source tag according to an embodiment of the present application, wherein a voice signal of any frequency band after encoding detected in a preset delay is a frame of data;
fig. 3 is a schematic diagram of a source end acquiring frame synchronization information and a playing end performing synchronization according to an embodiment of the present application;
fig. 4 is a schematic diagram of a UUID setting manner according to an embodiment of the present application.
FIG. 5 is a flowchart of another voice frequency division transmission method according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a source end according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a playing end according to an embodiment of the present application;
FIG. 8 is a schematic diagram of another source end according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of another playing end according to an embodiment of the present application;
Fig. 10 is a schematic structural diagram of a source circuit and a play circuit according to an embodiment of the present application;
fig. 11 is a schematic diagram of a source side circuit and a play side circuit according to another embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, some embodiments of the present application will be described in detail below by way of example with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in each instance, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the claimed technical solution of the present application can be realized without these technical details and various changes and modifications based on the following embodiments.
The embodiment of the application provides a voice frequency division transmission method which can be applied to various audio electronic equipment. The embodiment describes a voice frequency division transmission method provided by the embodiment of the application from the perspective of a source end. The source end is a transmitting end of the voice signal, the playing end is a receiving end of the voice signal, generally, the source end can be a mobile phone, a television, a computer, a tablet or mp3 and other electronic devices or one or more chips in the electronic devices, and the playing end can be a loudspeaker or earphone and other electronic devices or one or more chips in the electronic devices for playing the voice signal. The source and the play end in this embodiment may support various transmission protocols, such as a bluetooth low energy protocol, a classical bluetooth protocol, or wifi, which is not limited in this embodiment. Referring to fig. 1, fig. 1 is a flowchart of a voice frequency division transmission method according to an embodiment of the application, the method includes the following steps:
100: the source end encodes the first frequency band voice signal and the second frequency band voice signal;
in this embodiment, the number of frequency bands of the first frequency band voice signal and the second frequency band voice signal is not limited, and the first frequency band voice signal or the second frequency band voice signal may be a voice signal of one frequency band or a plurality of sub-frequency band voice signals. In this embodiment, the specific coding mode of the source end is not limited, and the user can select a corresponding coding mode according to the characteristics of the voice signals in each frequency band, in this embodiment, the voice signals in the first frequency band and the voice signals in the second frequency band can be obtained through filtering, in this embodiment, the type of the filter is not limited, and the filter can be a low-pass filter, a high-pass filter, a band-pass filter, a combination of multiple filters, or the like; in this embodiment, the first frequency band voice signal and the second frequency band voice signal may be obtained by other modes besides filtering, for example, if the encoding mode is only to encode the voice signal of the specific frequency band, the encoding of the specific frequency band can be achieved by directly transmitting the voice signals of all frequency bands to the encoder without filtering to obtain the voice signal of the specific frequency band, and using opus encoding as an example, opus can achieve encoding of the voice signal of the specific frequency band without obtaining the specific frequency band by filtering or other modes. In general, the entire frequency band of the voice signal is 20Hz-20kHz, and the first frequency band voice signal and the second frequency band voice signal in this embodiment may be any frequency band of 20Hz-20kHz, or may be any frequency band other than 20Hz-20 kHz.
101: the source end marks the frame synchronization information into the encoded first frequency band voice signal and the encoded second frequency band voice signal;
the source end respectively sends the encoded first frequency band voice signal and the encoded second frequency band voice signal to the playing end through the first synchronous link and the second synchronous link, so that the playing end can improve the audio quality only by executing the synchronization, and the playing end needs frame synchronization information when executing the synchronization, so that the source end can mark the frame synchronization information into the encoded first frequency band voice signal and the encoded second frequency band voice signal.
102: the source end respectively sends the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information to the playing end through the first synchronization link and the second synchronization link.
The synchronization link can be used for transmitting voice signals, the synchronization link only allows limited retransmission for ensuring the synchronism and instantaneity of data, and assuming that the original audio transmission method of the system uses the first synchronization link to transmit voice signals, the embodiment of the application can be completely compatible with the original audio transmission method of the system, when the source end and the playing end carry out audio transmission through the original audio transmission method, the scheme only needs to respectively transmit the encoded first frequency band voice signals and second frequency band voice signals with frame synchronization information to the playing end through the first synchronization link and the second synchronization link on the basis, the original audio transmission of the system cannot be influenced. In this embodiment, only one second synchronous link may be established to transmit the second frequency band voice signal, and if the second frequency band voice signal is divided into two sub-frequency band voice signals, only one or two second synchronous links may be established to transmit the two sub-frequency band voice signals.
The source end respectively transmits the encoded first frequency band voice signal and the encoded second frequency band voice signal with the frame synchronization information to the playing end through the first synchronization link and the second synchronization link, so that the playing end further processes the received first frequency band voice signal and the received second frequency band voice signal. When the original audio transmission method of the system uses a first synchronization link to transmit the audio signal of the main frequency band, for example, when the main frequency band is the audio signal of 20Hz-18kHz, the original audio transmission method of the system can use a first synchronization link to transmit the audio signal of 20Hz-18kHz, and the audio signal of 18kHz-20kHz is usually directly discarded to save bandwidth, but this can cause the high frequency part of the audio signal received by the playing end to be lost, and the tone quality to be reduced, so the embodiment can transmit the encoded audio signal of 18kHz-20kHz to the playing end through a second synchronization link, and can ensure the integrity of the audio signal at the source end, so that all or most of the audio signals of the frequency band are transmitted after being encoded to play the role of improving the tone quality. When the tone quality is required to be improved, the first synchronous link and the second synchronous link are utilized to respectively transmit the first frequency band voice signal and the second frequency band voice signal, if the original audio transmission method of the system uses the first synchronous link to transmit the encoded first frequency band voice signal, the system can play a role in improving the tone quality only by establishing the second synchronous link to transmit the encoded second frequency band voice signal, and when the second synchronous link is established or the encoded second frequency band voice signal is transmitted, the first synchronous link is not influenced to transmit the encoded first frequency band voice signal, so that a user cannot hear that the playing audio has a short-time pause phenomenon.
The embodiment of the application provides a voice frequency division transmission method, which is characterized in that a first frequency band voice signal with frame synchronization information and a second frequency band voice signal with frame synchronization information are respectively transmitted to a playing end through a first synchronization link and a second synchronization link, so that the problems of tone quality reduction caused by transmission bandwidth limitation and the problem of affecting playing audio when tone quality is improved are solved.
Based on the disclosure of the foregoing embodiment, in this embodiment, the compression rate of the coding mode of the second frequency band speech signal is higher than the compression rate of the coding mode of the first frequency band speech signal; or alternatively
The compression rate of the coding mode of the second frequency band voice signal is lower than that of the first frequency band voice signal.
The voice signals are divided into the first frequency band voice signals and the second frequency band voice signals, the compression ratios of the coding modes of the first frequency band voice signals and the second frequency band voice signals can be different, when the voice signals take the first frequency band voice signals as main parts, the compression ratio of the coding mode of the second frequency band voice signals can be set to be higher than that of the coding mode of the first frequency band voice signals, so that most of original voice signals are still reserved after the first frequency band voice signals are compressed, user experience is not affected when the first frequency band voice signals are played at a playing end, and the second frequency band voice signals are higher in compression ratio, but less in bandwidth occupation, and the second frequency band voice signals are still transmitted to the playing end, after the playing end plays the second frequency band voice signals, the function of improving sound quality can be achieved, and the setting mode of the compression ratio only increases a small amount of bandwidth occupation to provide better sound quality experience for users. Similarly, when the speech signal is mainly a second-band speech signal, the compression rate of the coding scheme of the second-band speech signal may be set lower than the compression rate of the coding scheme of the first-band speech signal.
Based on the disclosure of the foregoing embodiment, in this embodiment, the encoding, by the source end, the second frequency band speech signal includes: the source encodes a high frequency speech signal or the source encodes a non-high frequency speech signal. The second frequency band voice signal can be a high frequency voice signal or a non-high frequency voice signal, and for the high frequency voice signal, because the high frequency voice signal occupies more bandwidth, when the high frequency voice signal is encoded, an encoding mode suitable for the high frequency voice signal can be selected, so that the tone quality is improved, and meanwhile, part of bandwidth is saved. Since the characteristics of the high-frequency speech signal and the non-high-frequency speech signal are different, different encoding modes can be adopted for the high-frequency speech signal and the non-high-frequency speech signal, for example, the encoding mode of the high-frequency speech signal of 18kHz-20kHz can comprise a CELT encoding mode or an SBR (Spectral Band Replication, frequency band replication) encoding mode, wherein the CELT encoding mode is a core encoding algorithm built in an opus encoder; the coding mode of the non-high frequency voice signal can comprise a SILK coding mode, an SBC coding mode, an AAC coding mode or an MP3 coding mode, wherein the SILK coding mode is also a core coding algorithm built in an opus coder; it should be noted that, in this embodiment, the second frequency band speech signal is taken as a high frequency speech signal or a non-high frequency speech signal as an example, and the user may divide the second frequency band speech signal into a plurality of other sub-frequency band speech signals according to the requirement and then encode the sub-frequency band speech signals respectively. In this embodiment, after the high-frequency speech signal or the non-high-frequency speech signal is encoded, the encoded high-frequency speech signal or non-high-frequency speech signal may be transmitted using the second synchronization link.
In this embodiment, the source end may have the same or different coding modes for the first frequency band speech signal and the second frequency band speech signal, and when the source end has different coding modes for the first frequency band speech signal and the second frequency band speech signal, part of bandwidth may be saved while improving sound quality. The coding modes of the embodiment may be selected in various manners, and taking the second frequency band speech signal as an example, if the second frequency band speech signal is divided into a plurality of sub-frequency band speech signals, the same or different coding modes may be adopted for the plurality of sub-frequency band speech signals. Different coding modes or different code rates or compression rates are selected for the voice signals in different frequency bands, and better tone quality experience can be provided for users by only increasing a small amount of bandwidth occupation through adjusting the data compression ratio.
Based on the disclosure of the foregoing embodiment, in this embodiment, the source marks frame synchronization information to the encoded first frequency band speech signal and the encoded second frequency band speech signal, where the source marks the speech signal of any one of the encoded frequency bands detected within a preset delay, as one frame of data, and the frame synchronization information includes a start time and an end time of the one frame of data.
In order to correctly separate each frame of data to ensure audio quality, the source end may acquire frame synchronization information and then send the frame synchronization information to the playback end, so that the playback end acquires the frame synchronization information to perform synchronization.
Based on the disclosure of the foregoing embodiment, in this embodiment, please refer to fig. 2, fig. 2 is a flowchart of a source end marking of an embodiment of the present application, in which a voice signal of any frequency band after being detected in a preset delay is encoded, and the method specifically may include the following steps:
200: the source end detects any frequency band voice signal in the encoded voice signals of a plurality of frequency bands;
201: the source end starts to time the first delay until the first delay is equal to the preset delay;
202: the source end marks the voice signals of a plurality of frequency bands detected in the first delay as first frame data;
203: after the first delay, the source terminal detects the voice signal of any frequency band in the voice signals of the plurality of frequency bands after encoding again;
204: the source end starts to time the second delay until the second delay is equal to the preset delay;
205: the source end marks the voice signals of the multiple frequency bands detected in the second delay as second frame data;
206: after the second delay, the source terminal detects the voice signal of any frequency band in the voice signals of the plurality of frequency bands after encoding again;
207: the source end starts to time the Nth delay until the Nth delay is equal to the preset delay, wherein N is more than 2 and is an integer;
208: the source end marks the voice signals of a plurality of frequency bands detected in the Nth delay as the data of the Nth frame.
After the source end marks the voice signal of any frequency band detected in the preset time delay as one frame of data, the voice signal of any frequency band contains marking information, so that the playing end can recognize the voice signal of the same frame. The source end acquires the frame synchronization information, wherein the frame synchronization information comprises a starting time and an ending time of frame data. The value of N may be set by the user according to the data size of the voice signal, which is not limited in this embodiment. After the frame synchronization information is obtained, the source end sends the frame synchronization information to the playing end, and the playing end can synchronize the voice signal received by the playing end by utilizing the frame synchronization information after receiving the frame synchronization information, so that the audio quality is further improved. The start time and the end time of the first frame data, the second frame data and the nth frame data may be selectively marked in a corresponding frame data, so that the playing end performs synchronization according to the start time and the end time.
Taking the example that the source end only establishes a second synchronous link and the second synchronous link is used for transmitting the encoded high-frequency voice signal, it should be noted that in this embodiment, the second synchronous link may also be used for transmitting the encoded non-high-frequency voice signal, which is not limited in this embodiment; fig. 3 (a) shows a processing procedure of the source end on the first frequency band voice signal and the second frequency band voice signal, and as shown in fig. 3 (a), this embodiment only uses the first frequency band voice signal and the second frequency band voice signal as an example, but the method of marking, by the source end, the encoded voice signal of any frequency band detected within the preset delay as one frame of data can also be applied to an application scenario where the first frequency band voice signal and the second frequency band voice signal have a plurality of sub-frequency band voice signals respectively.
As shown in fig. 3 (a), at the source end, an uncoded speech signal is divided according to a DATA frame, taking a first frame as an example, the first frame can be divided into a high-frequency speech signal and a non-high-frequency speech signal by a filter, then the high-frequency speech signal and the non-high-frequency speech signal are respectively encoded, the high-frequency speech signal is encoded to be 01DATA1, the non-high-frequency speech signal is encoded to be 01DATA2, the encoded non-high-frequency speech signal 01DATA2 is transmitted to the play end through a first synchronous link, and the encoded high-frequency speech signal 01DATA1 is transmitted to the play end through a second synchronous link. And transmitting the encoded first frequency band voice signals and second frequency band voice signals to a playing end according to the processing mode of the first frame for the second frame, the third frame and the N frame.
Taking time-sharing transmission as an example for illustration, fig. 3 (c) shows a process that the source end marks the detected voice signal of any frequency band after encoding within the preset Delay as one frame of DATA, as shown in fig. 3 (c), the source end sends one frame of DATA at intervals Interval, when the source end sends the voice signal, the source end starts to time the first Delay when detecting the voice signal of any frequency band in the encoded voice signals of multiple frequency bands, in this embodiment, the source end starts to time the first Delay when detecting the encoded high-frequency voice signal 01DATA1 in the first frame of DATA until the first Delay is equal to the preset Delay, and the preset Delay may be greater than, less than or equal to the Interval, where the specific length of the preset Delay is not limited. The source end marks the voice signals of the frequency bands detected in the first delay as first frame DATA, the first frame DATA in the embodiment are 01DATA1 and 01DATA2, and the frame synchronization information comprises the starting time and the ending time of the 01DATA1 and 01DATA 2; after the first Delay1, the source terminal detects the voice signal 02DATA1 of any frequency band in the encoded voice signals of a plurality of frequency bands again, and starts to time the second Delay2 until the second Delay is equal to the preset Delay; the source marks 02DATA1 and 02DATA2 detected in the second delay are second frame DATA, and the frame synchronization information includes the start time and the end time of 01DATA1 and 01DATA2, and so on until the source marks the full DATA. The frame synchronization information may also include End times End1 and End2 of the first Delay1 and the second Delay2, and the frame synchronization information of the first frame DATA may be directly written into each frame DATA, for example, written into 01DATA1 and 01DATA2, so that the playing End obtains the frame synchronization information to perform synchronization.
As shown in fig. 3 (b), after the playing End obtains the frame synchronization information, the playing End may perform synchronization, if the playing End obtains the frame synchronization information, decoding of the received encoded first frame data starts at the End time End1 of the first delay, decoding of the received encoded second frame data starts at the End time End2 of the second delay, and so on, so as to achieve synchronization; or starting decoding at the end time of one frame of data to realize synchronization; after the playback end acquires the frame synchronization information, since the frame synchronization information has been written in 01DATA1 and 01DATA2, the playback end may also perform synchronization according to the specific DATA in 01DATA1 and 01DATA 2.
It should be noted that, in this embodiment, the method that the source end marks the voice signal of any frequency band detected in the preset delay as one frame of data is merely illustrative, and in actual use, a person skilled in the art may refer to the scheme of the embodiment of the present application, and may further obtain other methods for obtaining frame synchronization information according to this embodiment without performing creative labor.
Based on the disclosure of the foregoing embodiment, in this embodiment, before the source end sends the encoded second frequency band voice signal with the frame synchronization information to the playing end through the second synchronization link, the method includes the following steps:
300: determining the used link parameters according to the link parameters supported by the playing end and sent by the playing end;
301: and the source end establishes a second synchronous link with the playing end according to the used link parameters.
Before the source end sends the encoded second frequency band voice signal with the frame synchronization information to the playing end through the second synchronization link, the second synchronization link between the source end and the playing end needs to be established according to the used link parameters, and the source end can determine the used link parameters according to the link parameters supported by the playing end and sent by the playing end.
In this embodiment, after the source determines that the second synchronization link is established, the source may also send the link parameters supported by the source to the play end, so that the play end selects one or more link parameters supported by the source and the play end according to the link parameters supported by the source and the link parameters supported by the play end, and sends the selected link parameters to the source, so that the source determines the link parameters to be used. The source end sends the link parameters supported by the source end to the play end, so that the play end can determine the link parameters to be used, the source end sends the link parameters supported by the source end to the play end, when the play end selects a certain link parameter supported by the source end and the play end to be sent to the source end according to the link parameters supported by the source end and the link parameters supported by the play end, the link parameters selected by the play end are the link parameters to be used, namely, the play end can also determine the link parameters to be used, and the play end can determine the link parameters to be used according to the link parameters supported by the source end, which are sent by the source end.
After the above steps, the link parameters used are determined to facilitate the establishment of the second synchronous link, and the link parameters include the data frame size and the data frame interval, the PHY (physical layer) communication information, and the like.
Based on the disclosure of the foregoing embodiment, in this embodiment, before determining the link parameters to be used according to the link parameters supported by the playing end and sent by the playing end, the method includes the following steps:
400: the source end sends a second synchronous link request to the playing end;
401: the source end receives a reply of the second synchronous link request;
402: the source end determines whether to establish the second synchronous link according to the reply of the second synchronous link request.
After receiving the second synchronous link request sent by the source end, the playing end sends a reply of the second synchronous link request to the source end, and the source end determines whether to establish the second synchronous link according to the reply of the second synchronous link request.
The source end sends a second synchronous link request to the play end so that the play end can select whether to accept the establishment of the second synchronous link, and when the play end selects to accept the establishment of the second synchronous link, the link parameters supported by the play end are sent to the source end so that the source end can determine the used link parameters. After the playing end receives the second synchronous link request sent by the source end, the playing end sends a reply of the second synchronous link request so that the source end can determine whether to establish the second synchronous link, and after the source end determines to establish the second synchronous link, the source end determines the used link parameters according to the link parameters supported by the playing end, and the used link parameters need to be supported by the playing end and the source end at the same time.
Based on the disclosure of the foregoing embodiment, in this embodiment, before the source end encodes the second frequency band voice signal, the source end determines whether the playing end supports voice frequency division transmission according to the control data stream. When the source end and the playing end are connected, the source end can send a request for controlling the data flow to the playing end through an asynchronous link, the control data flow can be transmitted through the asynchronous link between the source end and the playing end, and the asynchronous link allows infinite retransmission, so that the data packet cannot be lost; after the playing end receives the request of the control data stream sent by the source end, the playing end sends the control data stream to the source end, the source end can judge whether the playing end supports the voice frequency division transmission through the control data stream sent by the playing end, judgment is carried out before the voice frequency division transmission starts, so that energy consumption is not increased under the condition that the playing end does not support the voice frequency division transmission, when the source end judges that the playing end does not support the voice frequency division transmission, voice frequency division transmission is not needed, and the source end can carry out audio transmission along the original audio transmission method of the system.
Based on the disclosure of the foregoing embodiment, in this embodiment, if the source end identifies the voice frequency division transmission service through a custom Universal Unique Identifier (UUID), the source end determines, according to the control data stream, whether the play end supports voice frequency division transmission, including:
The control data stream comprises a value of a custom UUID, and if the value of the custom UUID of the playing end received by the source end is equal to a preset UUID value, the source end determines that the playing end supports voice frequency division transmission. The source end uses the value of the user-defined UUID to judge whether the playing end supports voice frequency division transmission, so that the compatibility of the source end and the playing end can be improved. If the value of the custom UUID of the playing end received by the source end is equal to the preset UUID value, the source end determines that the playing end supports voice frequency division transmission. Taking the bluetooth connection between the source end and the play end as an example, in the bluetooth protocol, UUID is used to identify services provided by the bluetooth device, the UUID may be Primary Service (Primary Service), feature (feature), etc., and the user may customize a Universal Unique Identifier (UUID) to identify the voice frequency division transmission Service. The UUID may be set in a manner referring to fig. 4, in fig. 4, enhance Audio Value may represent that the user of the preset UUID value corresponding to Enhance Audio Value may set itself, and the preset UUID values of the main service and the enhanced service may be the same or different; in fig. 4, handle represents an index, where the index may help find an address of a UUID in a memory, a specific value of OxXXXX is determined by the specific address of the UUID in the memory, the value of 0xXXXX is not limited in this embodiment, and values of Y and Z are determined by the size of data corresponding to the UUID, which is not limited in this embodiment; in fig. 4, 0xOPQ is a UUID defined by a user, and the user may set the preset UUID according to the format of the value of the UUID in fig. 4 as a reference, where it is to be noted that the content in fig. 4 is only illustrative, and in actual use, a person skilled in the art may refer to the solution of the embodiment of the present application, and may obtain other setting manners of the value of the UUID according to this embodiment without performing creative effort.
Based on the disclosure of the foregoing embodiment, in this embodiment, if the source end determines that the play end supports voice frequency division transmission according to the control data stream, the following steps are executed:
500: the source end sends an audio configuration parameter request to the playing end:
501: the source end receives audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end, wherein the audio configuration parameters comprise coding and decoding parameters and code rates, and the coding and decoding parameters comprise one or two of a coding mode and a decoding mode;
502: the source end determines the used audio configuration parameters according to the audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end and sends the used audio configuration parameters to the playing end.
After step 500, the playing end receives the audio configuration parameter request sent by the source end, after the playing end receives the audio configuration parameter request sent by the source end, the playing end sends the audio configuration parameter corresponding to the second frequency band voice signal supported by the playing end to the source end, after the source end receives the audio configuration parameter corresponding to the second frequency band voice signal supported by the playing end, the source end determines the used audio configuration parameter according to the audio configuration parameter corresponding to the second frequency band voice signal supported by the playing end and sends the used audio configuration parameter to the playing end, and in addition, the used audio configuration parameter also needs to be the audio configuration parameter supported by the source end. The playing end receives the used audio configuration parameters sent by the source end and configures the used audio configuration parameters, and after the used audio configuration parameters are determined, the playing end can also configure the used audio configuration parameters.
In this embodiment, after the source terminal sends the audio configuration parameter request to the play terminal, the source terminal may also send the audio configuration parameter supported by the source terminal to the play terminal, so that the play terminal selects one or more audio configuration parameters supported by the source terminal and the play terminal according to the audio configuration parameter supported by the source terminal and the audio configuration parameter supported by the play terminal, and sends the selected audio configuration parameters to the source terminal, so that the source terminal determines the used audio configuration parameters. The source end can send the audio configuration parameters supported by the source end to the play end, so that the play end can also determine the audio configuration parameters to be used, and when the play end selects one audio configuration parameter supported by the source end and the play end to be sent to the source end according to the audio configuration parameters supported by the source end and the audio configuration parameters supported by the play end, the audio configuration parameters selected by the play end are the audio configuration parameters to be used;
in this embodiment, the audio configuration parameters include coding and decoding parameters and code rates, where the coding and decoding parameters include one or two of coding modes and decoding modes, and after the source end receives one or two of the coding modes and decoding modes supported by the playing end, the source end can determine the coding mode to be used, so that the playing end can decode after receiving the voice signal; after the playing end receives one or two of the coding mode and the decoding mode supported by the source end, the playing end can determine the decoding mode to be used so as to facilitate the playing end to decode the received coded first frequency band voice signal and second frequency band voice signal; the encoding and decoding parameters comprise one or two of an encoding mode and a decoding mode, and can also comprise sampling depth and sampling rate, a user can set the sampling rate and the sampling depth on the second synchronous link according to requirements so as to further improve sound quality, a source end can perform corresponding encoding according to the encoding mode, a playing end can perform corresponding decoding according to the decoding mode, in addition, the audio configuration parameters can also comprise equipment numbers, equipment addresses and the like, and mutual identification of the source end and the playing end is facilitated. In addition, the audio configuration parameter may also include a code rate, where the code rate may be set according to a data frame size, where setting the code rate may further save bandwidth, may set a code rate of the second frequency band voice signal higher or lower than a code rate of the first frequency band voice signal, for example, may set a code rate of the high frequency voice signal lower than a code rate of the non-high frequency voice signal, specifically, may set a code rate of the high frequency voice signal lower than or equal to twenty percent of a code rate of the non-high frequency voice signal, and the specific value of the code rate is not limited in this embodiment.
Based on the disclosure of the foregoing embodiment, in this embodiment, the number of second synchronous links is less than or equal to the number of frequency bands of the second frequency band voice signal. In this embodiment, the number of second synchronous links may be equal to the number of frequency bands of the second frequency band voice signal, that is, each second synchronous link may transmit only one sub-frequency band voice signal in the second frequency band voice signal; the number of second synchronous links may be smaller than the number of frequency bands of the second frequency band voice signals, i.e. each second synchronous link may transmit two or two sub-frequency band voice signals of the second frequency band voice signals. In addition, the source end can stop voice frequency division transmission according to the electric quantity condition or the link quality of the second synchronous links, when the electric quantity of the source end is insufficient, the source end can disconnect one or more second synchronous links to partially stop or completely stop voice frequency division transmission so as to prolong the endurance time, and in addition, disconnecting one or more second synchronous links comprises disconnecting part or all of the second synchronous links. When the link quality of the second synchronous link is poor, the source end can disconnect one or more second synchronous links to partially or completely stop voice frequency division transmission to prolong the endurance time, so that the effects of occupying bandwidth and improving sound quality are not achieved; in addition, after the one or more second synchronous links are disconnected, the source end may reestablish the one or more second synchronous links according to the power condition or the link quality of the second synchronous links to restart or enhance the voice frequency division transmission, for example, when the power of the source end reaches the power preset value or the link quality of the second synchronous links is improved to the link quality preset value, the source end may reestablish the one or more second synchronous links to restart or enhance the voice frequency division transmission. In addition, for the playing end, one or more second synchronous links can be disconnected or one or more second synchronous links can be re-established according to the electric quantity condition or the link quality of the second synchronous links, whether the source end or the playing end initiates to disconnect one or more second synchronous links, the initiated end shall unconditionally accept to disconnect one or more second synchronous links.
The embodiment of the application provides a voice frequency division transmission method, which is described from the perspective of a playing end, please refer to fig. 5, fig. 5 is a flowchart of the voice frequency division transmission method provided by the embodiment of the application, the method comprises:
600: the playing end receives the coded first frequency band voice signal with the frame synchronization information and the coded second frequency band voice signal with the frame synchronization information through the first synchronization link and the second synchronization link respectively;
601: the playing end decodes the received first frequency band voice signal and the received second frequency band voice signal;
602: the playing end synchronizes the decoded first frequency band voice signal and the decoded second frequency band voice signal through the frame synchronization information.
In this embodiment, after the source end establishes a second synchronization link with the playing end, the source end transmits the encoded first frequency band voice signal and the encoded second frequency band voice signal with the frame synchronization information to the playing end through the first synchronization link and the second synchronization link, and the playing end decodes the encoded first frequency band voice signal and the encoded second frequency band voice signal with the frame synchronization information after receiving the encoded first frequency band voice signal and the encoded second frequency band voice signal with the frame synchronization information, where the decoding mode is not limited. The playing end may adopt the same decoding mode as the received first frequency band voice signal and the received second frequency band voice signal, or may adopt different decoding modes, if the second frequency band voice signal includes a plurality of sub-frequency band voice signals, the decoding modes of the received encoded plurality of sub-frequency band voice signals may be the same or may be different, for example, if the playing end decodes the received four sub-frequency band voice signals, one, two, three or four decoding modes may be selected. After the playing end decodes the received first frequency band voice signal and the second frequency band voice signal, the playing end synchronizes the decoded first frequency band voice signal and second frequency band voice signal through the frame synchronization information, so that the audio quality can be further improved, and the specific synchronization method is not limited in the embodiment.
The embodiment of the application respectively receives the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information through the first synchronization link and the second synchronization link, thereby solving the problem of tone quality reduction caused by the limitation of transmission bandwidth and the problem of affecting the playing audio when improving the tone quality.
Based on the disclosure of the foregoing embodiment, in this embodiment, after the decoded first frequency band speech signal and the decoded second frequency band speech signal are synchronized, the electroacoustic conversion is performed after the digital-to-analog conversion and the amplification, so that the user can hear the sound. After the playing end synchronizes the decoded first frequency band voice signal and the decoded second frequency band voice signal through the frame synchronization information, the method comprises the following steps:
700: the playing end respectively carries out digital-to-analog conversion on the synchronized first frequency band voice signal and the synchronized second frequency band voice signal through one or more different digital-to-analog converters;
701: the playing end respectively amplifies the first frequency band voice signal after digital-to-analog conversion and the second frequency band voice signal after digital-to-analog conversion through different one or more amplifiers;
702: the playing end performs electroacoustic conversion on the amplified first frequency band voice signal and the amplified second frequency band voice signal through one or more different electroacoustic converters respectively.
After the playing end synchronizes the decoded first frequency band voice signal and the decoded second frequency band voice signal through the frame synchronization information sent by the source end, the playing end can perform digital-to-analog conversion through a digital-to-analog converter, then amplify through an amplifier, and then perform electroacoustic conversion through an electroacoustic converter; after the playing end synchronizes the decoded first frequency band voice signal and the decoded second frequency band voice signal, the playing end can also respectively perform digital-to-analog conversion on the synchronized first frequency band voice signal and second frequency band voice signal through different digital-to-analog converters, the embodiment can adopt two or more than two different digital-to-analog converters to adapt to the characteristics of voice signals of different frequency bands, then the playing end can respectively amplify the digital-to-analog converted first frequency band voice signal and second frequency band voice signal through different amplifiers, the embodiment can adopt two or more than two different amplifiers to adapt to the characteristics of voice signals of different frequency bands, then the playing end respectively performs electroacoustic conversion on the amplified first frequency band voice signal and second frequency band voice signal through different electroacoustic converters, the embodiment can adopt two or more than two different electroacoustic converters to adapt to the characteristics of voice signals of different frequency bands, the electroacoustic converters can be speakers or loudspeakers and the like to convert electric energy into sound energy.
In this embodiment, the playing end performs digital-to-analog conversion on the synchronized first frequency band voice signal and the synchronized second frequency band voice signal respectively, and may use different digital-to-analog converters to perform digital-to-analog conversion on the synchronized first frequency band voice signal and second frequency band voice signal according to the characteristics of the voice signals in different frequency bands, so as to further improve audio quality, and after digital-to-analog conversion, the playing end amplifies the digital-to-analog converted first frequency band voice signal and second frequency band voice signal and then performs electroacoustic conversion; after the playing end performs digital-to-analog conversion on the synchronized first frequency band voice signal and the synchronized second frequency band voice signal respectively, the playing end amplifies the digital-to-analog converted first frequency band voice signal and the digital-to-analog converted second frequency band voice signal respectively, and can amplify the synchronized first frequency band voice signal and second frequency band voice signal respectively by using different amplifiers according to the characteristics of the voice signals of different frequency bands so as to further improve audio quality. It should be noted that, in this embodiment, the playing end only performs digital-to-analog conversion on the synchronized first frequency band voice signal and second frequency band voice signal through different digital-to-analog converters, so that the audio quality can be further improved; the playing end only amplifies the first frequency band voice signal and the second frequency band voice signal after digital-to-analog conversion through different amplifiers respectively, so that the audio quality can be further improved; the playing end only carries out electroacoustic conversion on the amplified first frequency band voice signal and the amplified second frequency band voice signal through different electroacoustic converters respectively, so that the audio quality can be further improved.
Based on the disclosure of the foregoing embodiment, in this embodiment, before the playing end receives the encoded second frequency band voice signal with the frame synchronization information through the second synchronization link, the playing end may send a control data stream to the source end, so that the source end determines whether the playing end supports voice frequency division transmission according to the control data stream, and before starting voice frequency division transmission, determines whether the playing end supports voice frequency division transmission, so as to avoid increasing energy consumption if the playing end does not support voice frequency division transmission, and if the source end does not support voice frequency division transmission, the source end starts to perform voice frequency division transmission when encoding the first frequency band voice signal and the second frequency band voice signal. When the source end judges that the playing end does not support voice frequency division transmission, the source end can carry out audio transmission along the original audio transmission method of the system, and the encoding of the first frequency band voice signal and the second frequency band voice signal is not carried out.
Based on the disclosure of the foregoing embodiment, in this embodiment, if the source end determines that the play end supports voice frequency division transmission according to the control data stream, the play end receives the second synchronization link request sent by the source end, and after receiving the second synchronization link request sent by the source end, the play end sends a reply of the second synchronization link request to the source end, and if the play end supports voice frequency division transmission, the play end sends link parameters supported by the play end to the source end so that the source end establishes the second synchronization link.
Based on the disclosure of the foregoing embodiment, in this embodiment, before the playing end receives the second synchronization link request sent by the source end, the method includes the following steps:
701: the playing end receives an audio configuration parameter request sent by the source end;
702: the playing end sends audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end to the source end;
703: the playing end receives the used audio configuration parameters sent by the source end and configures the used audio configuration parameters.
The source end sends an audio configuration parameter request to the play end, the play end sends an audio configuration parameter corresponding to a second frequency band voice signal supported by the play end to the source end after receiving the audio configuration parameter request sent by the source end, the source end determines a used audio configuration parameter according to the audio configuration parameter corresponding to the second frequency band voice signal supported by the play end and sends the used audio configuration parameter to the play end, and the play end receives the used audio configuration parameter sent by the source end and configures the used audio configuration parameter and also configures the used audio configuration parameter.
Based on the disclosure of the foregoing embodiment, in this embodiment, the playing end may disconnect one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links, when the electric quantity of the playing end is insufficient, the playing end may disconnect one or more second synchronous links to partially suspend or completely suspend the voice frequency division transmission to prolong the endurance time, and when one or more second synchronous links are disconnected, the voice signals of the corresponding frequency bands on the disconnected one or more second synchronous links are not encoded and decoded; or when the link quality of the second synchronous link is poor, the playing end can disconnect one or more second synchronous links so as to avoid occupying bandwidth and not achieving the effect of improving sound quality; in addition, after the voice frequency division transmission is partially or completely suspended, the playing end may request the source end to reestablish one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links to restart or enhance the voice frequency division transmission, for example, when the electric quantity of the playing end reaches the electric quantity preset value or the link quality of the second synchronous links is improved to the link quality preset value, the playing end may request the source end to reestablish the disconnected one or more second synchronous links to restart or enhance the voice frequency division transmission. In addition, for the source end, one or more second synchronous links can be disconnected or one or more second synchronous links can be re-established according to the electric quantity condition or the link quality of the second synchronous links, whether the source end or the playing end initiates to disconnect one or more second synchronous links, the initiated end shall unconditionally accept to disconnect one or more second synchronous links.
The embodiment of the application provides a voice frequency division transmission method, which is used for respectively receiving a coded first frequency band voice signal and a coded second frequency band voice signal with frame synchronization information through a first synchronization link and a second synchronization link, thereby solving the problem of tone quality reduction caused by transmission bandwidth limitation and the problem of affecting playing audio when tone quality is improved.
The embodiment of the present application may further provide a source end for executing the voice frequency division transmission method set forth in the foregoing embodiment, and fig. 6 is a schematic structural diagram of the source end provided in the present embodiment, as shown in fig. 6, where the source end 50 includes:
an encoding module 51, configured to encode the first frequency band speech signal and the second frequency band speech signal;
a pre-synchronization module 52, configured to mark frame synchronization information into the encoded first frequency band speech signal and the encoded second frequency band speech signal; and
the first sending module 53 is configured to send the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information to the playing end through the first synchronization link and the second synchronization link, respectively.
Optionally, the compression rate of the coding mode of the second frequency band voice signal is higher than the compression rate of the coding mode of the first frequency band voice signal; or alternatively
The compression rate of the coding mode of the second frequency band voice signal is lower than that of the first frequency band voice signal.
Optionally, the encoding module includes:
the high-frequency coding module is used for coding the high-frequency voice signals, and the coding mode of the high-frequency voice signals comprises a CELT coding mode or an SBR coding mode; or alternatively
The non-high frequency coding module is used for coding the non-high frequency voice signals, and the coding mode of the non-high frequency voice signals comprises a SILK coding mode, an SBC coding mode, an AAC coding mode or an MP3 coding mode.
Optionally, the pre-synchronization module includes:
the data frame marking module is used for marking the voice signal of any frequency band after being detected in the preset time delay as one frame of data, and the frame synchronization information comprises the starting time and the ending time of one frame of data.
Optionally, the source end further includes:
the first transmitting module is used for determining the used link parameters according to the link parameters supported by the playing end and transmitted by the playing end before transmitting the encoded second frequency band voice signals with the frame synchronization information to the playing end through the second synchronous link;
and the link establishment module is used for establishing a second synchronous link with the playing end according to the used link parameters.
Optionally, the source end further includes:
the first parameter determining module is used for sending a first synchronous link request to the playing end before determining the used link parameters according to the link parameters supported by the playing end and sent by the playing end; and
the first receiving module is used for receiving a reply of the second synchronous link request;
the first parameter determining module is further configured to determine whether to establish the second synchronous link according to a reply of the second synchronous link request.
Optionally, the source end further includes:
the first judging module is used for judging whether the playing end supports voice frequency division transmission or not according to the control data stream before the encoding module encodes the voice signal in the second frequency band, and the control data stream is transmitted through an asynchronous link.
Optionally, the source end further includes a UUID module, configured to identify the voice frequency division transmission service by using a custom universal unique identification code (UUID);
the first judging module includes:
and the second judging module is used for controlling the data stream to comprise the value of the custom UUID, and if the received value of the custom UUID of the playing end is equal to the preset UUID value, the second judging module is used for determining that the playing end supports voice frequency division transmission.
Optionally, the source end further includes:
and a third sending module: if the first judging module determines that the playing end supports voice frequency division transmission according to the control data stream, the first judging module is used for sending an audio configuration parameter request to the playing end;
And a second receiving module: the audio configuration parameters are used for receiving audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end, the audio configuration parameters comprise coding and decoding parameters and code rates, and the coding and decoding parameters comprise one or two of a coding mode and a decoding mode; and
the second parameter determining module is used for determining the used audio configuration parameters according to the audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end;
the third sending module is further configured to send the used audio configuration parameter to the playing end.
Optionally, the source end further includes:
the first transmission control module is used for disconnecting one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links, and the number of the second synchronous links is smaller than or equal to the frequency band number of the second frequency band voice signals; or alternatively
The first transmission control module is further configured to establish one or more second synchronous links according to an electric quantity condition or link quality of the second synchronous links, where the number of the second synchronous links is less than or equal to the number of frequency bands of the second frequency band voice signal.
The embodiment of the application provides a source end, which is used for executing the voice frequency division transmission method provided in the previous embodiment, and respectively transmitting the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information to a playing end through a first synchronization link and a second synchronization link, thereby solving the problem of tone quality reduction caused by transmission bandwidth limitation and the problem of affecting playing audio when improving tone quality.
The embodiment of the present application may further provide a playing end, which is configured to execute the voice frequency division transmission method set forth in the foregoing embodiment, and fig. 7 is a schematic structural diagram of the playing end provided in this embodiment, as shown in fig. 7, where the playing end 60 includes:
a third receiving module 61, configured to receive, through a first synchronization link and a second synchronization link, an encoded first frequency band speech signal with frame synchronization information and an encoded second frequency band speech signal with frame synchronization information, respectively;
a decoding module 62, configured to decode the received encoded first frequency band speech signal and the encoded second frequency band speech signal;
the synchronization module 63 is configured to synchronize the decoded first frequency band speech signal and the decoded second frequency band speech signal through the frame synchronization information.
Optionally, the playing end further includes:
the digital-to-analog conversion module is used for respectively carrying out digital-to-analog conversion on the synchronized first frequency band voice signal and the synchronized second frequency band voice signal;
the one or more different amplifying modules are used for amplifying the first frequency band voice signals and the second frequency band voice signals after digital-to-analog conversion respectively; and
and the one or more different electroacoustic conversion modules are used for respectively electroacoustic converting the amplified first frequency band voice signals and the amplified second frequency band voice signals.
Optionally, the playing end further includes:
and the fourth sending module is used for sending a control data stream to the source end before the third receiving module receives the encoded second frequency band voice signal with the frame synchronization information through the second synchronous link, so that the source end judges whether the playing end supports voice frequency division transmission according to the control data stream.
Optionally, the playing end further includes:
a fourth receiving module, configured to receive a second synchronization link request sent by the source end if the source end determines that the play end supports voice frequency division transmission according to the control data stream; and
a fifth sending module, configured to send a reply of the second synchronous link request;
if the playing end supports voice frequency division transmission, the fifth sending module is further used for sending the link parameters supported by the playing end to the source end.
Optionally, the playing end further includes:
the fifth receiving module is used for receiving an audio configuration parameter request sent by the source end before the fourth receiving module receives the second synchronous link request sent by the source end;
a sixth sending module, configured to send audio configuration parameters corresponding to the second frequency band voice signal supported by the playing end to the source end;
the fifth receiving module is further configured to receive the used audio configuration parameter sent by the source end; and
And the parameter configuration module is used for configuring the used audio configuration parameters.
Optionally, the playing end further includes:
the second transmission control module is used for disconnecting one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links; or alternatively
The second transmission control module is further configured to establish one or more second synchronous links according to the power condition or the link quality request source end of the second synchronous link.
The embodiment of the application provides a playing end, which receives a coded first frequency band voice signal and a coded second frequency band voice signal with frame synchronization information through a first synchronization link and a second synchronization link respectively, so that the problem of tone quality reduction caused by transmission bandwidth limitation and the problem of affecting playing audio when tone quality is improved are solved.
The embodiment of the present application may further provide a source end, configured to execute the voice frequency division transmission method provided in the embodiment, as shown in fig. 8, where the source end 70 includes: a memory 71 and a processor 72;
memory 71 is coupled to processor 72;
a memory 71 for storing program instructions;
the processor 72 is configured to invoke the program instructions stored in the memory, so that the source end performs the voice frequency division transmission method.
The source end provided by the embodiment of the present application may execute the voice frequency division transmission method provided by any one of the above embodiments, and specific implementation processes and beneficial effects thereof are referred to above and are not described herein.
The embodiment of the present application may further provide a playing end, configured to execute the voice frequency division transmission method provided in the embodiment, as shown in fig. 9, where the playing end 80 includes: a memory 81 and a processor 82;
memory 81 is coupled to processor 82;
a memory 81 for storing program instructions;
and the processor 82 is used for calling the program instructions stored in the memory to enable the playing end to execute the voice frequency division transmission method.
The playing end provided by the embodiment of the present application may execute the voice frequency division transmission method provided by any one of the above embodiments, and specific implementation processes and beneficial effects thereof are referred to above and are not described herein again.
Embodiments of the present application may also provide a computer readable storage medium having stored thereon a computer program which, when executed by the processor 72, implements a method of performing a source-side voice divide transmission.
The computer readable storage medium provided by the embodiment of the present application may execute the voice frequency division transmission method performed by the source end provided by any one of the embodiments, and specific implementation processes and beneficial effects thereof are referred to above and are not repeated herein.
Embodiments of the present application may also provide a computer readable storage medium having stored thereon a computer program which, when executed by the processor 82, implements a method for performing voice frequency division transmission performed by a playback end.
The computer readable storage medium provided by the embodiment of the present application may execute the voice frequency division transmission method executed by the playing end provided by any one of the embodiments, and specific implementation processes and beneficial effects thereof are referred to above and are not repeated herein.
The embodiment of the present application may also provide a source circuit, which may be used to implement the voice frequency division transmission method provided in the foregoing embodiment, and fig. 10 is a schematic structural diagram of the source circuit provided in this embodiment. The source side circuit includes:
an encoder for encoding the first frequency band speech signal and the second frequency band speech signal; and
and the source end controller is connected with the encoder and is used for respectively transmitting the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information to the playing end circuit through the first synchronization link and the second synchronization link.
As shown in fig. 10, the encoder 0 is an original encoder of the system, the first synchronization link 0 of the system is used to transmit the encoded first frequency band voice signal, and only one encoder 0 at the source end is taken as an example for explanation, in this embodiment, the voice signal is separated into the first frequency band voice signal and the second frequency band voice signal, for example, the second frequency band voice signal is a high frequency voice signal, and the first frequency band voice signal is a non-high frequency voice signal; encoder 0 may be an opus encoder with two core coding algorithms built into it: the CELT coding method and the SILK coding method, assuming that the original audio transmission method uses the SILK coding method to code the non-high frequency speech signal, the opus encoder can still use the CELT coding method to code the high frequency speech signal; in this embodiment, a plurality of encoders may be used, and the number of encoders is not limited, and the encoder 0 and the encoder 1 are used as examples in this embodiment, for example, the encoder 0 may encode a non-high frequency speech signal of a speech signal, and the encoder 1 may encode a high frequency speech signal, and since the characteristics of the high frequency speech signal and the non-high frequency speech signal are different, if different encoding modes are used for encoding respectively, the purpose of increasing a small bandwidth and improving audio quality can be achieved. Referring to fig. 10, for the second frequency band voice signal, after the encoder 0 encodes the second frequency band voice signal, the second frequency band voice signal is transmitted to the playing end through the second synchronization link 1, and the source controller is connected to the encoder 0 and is used for transmitting the encoded first frequency band voice signal and the second frequency band voice signal with frame synchronization information through the first synchronization link 0 and the second synchronization link 1. When the second frequency band voice signal includes m sub-frequency band voice signals, m >1 and is an integer, and m second synchronous links may be respectively corresponding to the m second synchronous links, it should be noted that, the number of the second synchronous links herein is m merely for illustrative purposes, and the second synchronous links smaller than m may be used to transmit the m sub-frequency band voice signals, which is not limited in this embodiment.
Based on the disclosure of the foregoing embodiment, in this embodiment, the source-side circuit may further include a filter, where the filter is connected to the encoder and is configured to separate the first frequency band speech signal and the second frequency band speech signal. Referring to the source circuit shown in fig. 11, as shown in fig. 11, after the voice signal is encoded by the filter 1, the voice signal is transmitted to the playing end through the corresponding second synchronous link 1, the obtaining of the voice signal in the first frequency band may be implemented by a filter, or may not need a filter, and the encoding of the voice signal in the specific frequency band may be implemented by the encoder 0 only, where it should be noted that the number of filters is not limited, or only one filter may be implemented, especially if some encoders are used to encode only the voice signal in the specific frequency band, the encoder may not need a corresponding filter, for example, before the opus encoder, the filter may not be required, or the type of the filter may not be limited, and a low-pass filter, a high-pass filter, a band-pass filter, or other filters may be used.
The embodiment of the application provides a source end circuit, which solves the problem of tone quality reduction caused by transmission bandwidth limitation and the problem of affecting playing audio when improving tone quality by encoding a first frequency band voice signal and a second frequency band voice signal and respectively transmitting the encoded first frequency band voice signal and the second frequency band voice signal with frame synchronization information through a first synchronization link and a second synchronization link.
The embodiment of the present application may also provide a play-side circuit, which may be used to implement the voice frequency division transmission method provided in the foregoing embodiment, please refer to fig. 10, fig. 10 is a schematic structural diagram of the source-side circuit and the play-side circuit provided in the present embodiment.
The playing end circuit comprises:
a playing end controller for receiving the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information through a first synchronization link and a second synchronization link respectively; and
and the decoders are connected with the playing end controller and used for decoding the received first frequency band voice signals and the received second frequency band voice signals.
As shown in fig. 10, the decoder 0 may be an original decoder of the system, where the first synchronization link 0 is used to transmit the encoded first frequency band speech signal, in this embodiment, 1 or more decoders may be used, the number of the decoders is not limited in this embodiment, and when one decoder is used, one decoder may use different decoding modes to decode the encoded first frequency band speech signal and the second frequency band speech signal with frame synchronization information; taking the example that the playing end has the decoder 0 and the decoder 1 as the example, for example, the decoder 0 can decode the non-high frequency voice signal, and the decoder 1 can decode the high frequency voice signal, and because the characteristics of the high frequency voice signal and the non-high frequency voice signal are different, different decoders are adopted, so that the purpose of increasing a small amount of bandwidth can be achieved, and the audio quality can be improved. As shown in fig. 10, after encoding the second frequency band voice signal, the encoder 0 transmits the second frequency band voice signal to the playing end through the second synchronization link 1, and the playing end controller is connected to the decoder 0 and is configured to receive the encoded first frequency band voice signal and the second frequency band voice signal with frame synchronization information through the first synchronization link 0 and the second synchronization link 1, respectively. In this embodiment, the number of decoders may be equal to the number of encoders or may not be equal to the number of encoders. The decoded first frequency band voice signal and the second frequency band voice signal are subjected to electroacoustic conversion through an electroacoustic converter after passing through a digital-to-analog converter and an amplifier.
Based on the disclosure of the foregoing embodiment, in this embodiment, the playing side circuit further includes:
one or more different digital-to-analog converters respectively connected with the decoder and used for respectively performing digital-to-analog conversion on the decoded first frequency band voice signal and the decoded second frequency band voice signal;
the one or more different amplifiers are respectively connected with the one or more digital-to-analog converters and are used for respectively amplifying the digital-to-analog converted first frequency band voice signals and the digital-to-analog converted second frequency band voice signals; and
and the one or more different electroacoustic converters are respectively connected with the one or more amplifiers and are used for respectively electroacoustic converting the amplified first frequency band voice signals and the amplified second frequency band voice signals.
Referring to fig. 11, fig. 11 is a schematic diagram of a source circuit and a play circuit according to an embodiment of the present application, in this embodiment, a decoded first frequency band voice signal and a decoded second frequency band voice signal may be respectively digital-to-analog converted by a digital-to-analog converter 0 and a digital-to-analog converter 1, and for voice signals of different frequency bands, different digital-to-analog converters may be selected according to characteristics of the voice signals of different frequency bands, so as to further improve sound quality, in this embodiment, the first frequency band voice signal and the second frequency band voice signal after digital-to-analog conversion may be amplified in one amplifier, and then electroacoustic converted by one electroacoustic converter; the first frequency band voice signal and the second frequency band voice signal after digital-analog conversion can be respectively amplified through the amplifier 0 and the amplifier 1, and for the voice signals of different frequency bands, different amplifiers can be selected according to the characteristics of the voice signals of different frequency bands so as to further improve the tone quality, and the amplified first frequency band voice signal and second frequency band voice signal can be subjected to electroacoustic conversion by using one electroacoustic converter; the amplified first frequency band voice signal and the second frequency band voice signal can also be subjected to electroacoustic conversion through a plurality of electroacoustic converters, and electroacoustic converters with different frequency responses can be selected to be used for respectively electroacoustic conversion of the amplified first frequency band voice signal and the amplified second frequency band voice signal according to the characteristics of the voice signals with different frequency bands, so that the audio quality is further improved. In fig. 11, each decoder corresponds to a digital-to-analog converter, an amplifier, and a speaker, and it should be noted that fig. 11 is only an exemplary illustration, and one or more digital-to-analog converters, one or more amplifiers, or one or more speakers may be shared among multiple decoders, which is not limited in this embodiment. When the second frequency band speech signal includes m sub-frequency band speech signals, the m second synchronous links may be respectively corresponding to the m second synchronous links, in this embodiment, for the encoded m sub-frequency band speech signals, the number of corresponding decoders may be less than or equal to m, and the number of corresponding digital-to-analog converters, amplifiers and electroacoustic converters may be less than or equal to m.
The embodiment of the application provides a playing end circuit, which is used for respectively receiving a coded first frequency band voice signal and a coded second frequency band voice signal with frame synchronization information through a first synchronization link and a second synchronization link, thereby solving the problem of tone quality reduction caused by transmission bandwidth limitation and the problem of affecting playing audio when tone quality is improved.
It should be noted that the above-described method embodiments of the present application may be applied in a processor or implemented by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application 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 application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.
It will be appreciated that the memory in embodiments of the application may be volatile memory or nonvolatile memory, or 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 EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
It should be understood that in embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.
In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (40)

1. A voice frequency division transmission method, comprising:
the source end encodes the first frequency band voice signal and the second frequency band voice signal;
the source end marks the frame synchronization information into the encoded first frequency band voice signal and the encoded second frequency band voice signal;
after the source end establishes a second synchronous link with the playing end, the source end respectively sends the encoded first frequency band voice signal with the frame synchronous information and the encoded second frequency band voice signal with the frame synchronous information to the playing end through a first synchronous link and the second synchronous link;
before the source end establishes a second synchronous link with the playing end, the source end uses the first synchronous link to transmit the encoded first frequency band voice signal to the playing end.
2. The voice crossover transmission method according to claim 1, comprising:
the compression rate of the coding mode of the second frequency band voice signal is higher than that of the first frequency band voice signal; or alternatively
The compression rate of the coding mode of the second frequency band voice signal is lower than that of the first frequency band voice signal.
3. The voice frequency division transmission method according to claim 1 or 2, wherein the source encoding the second frequency band voice signal includes:
the source end encodes a high-frequency voice signal, and the encoding mode of the source end for the high-frequency voice signal comprises a CELT encoding mode or an SBR encoding mode; or alternatively
The source end encodes the non-high frequency voice signal, and the encoding mode of the source end for the non-high frequency voice signal comprises a SILK encoding mode, an SBC encoding mode, an AAC encoding mode or an MP3 encoding mode.
4. The voice frequency division transmission method according to claim 1 or 2, wherein the source labeling frame synchronization information into the encoded first band voice signal and the encoded second band voice signal comprises:
the source end marks the voice signal of any frequency band after being detected in the preset time delay as one frame of data, and the frame synchronization information comprises the starting time and the ending time of the one frame of data.
5. The voice frequency division transmission method according to claim 1 or 2, wherein before the source end transmits the encoded second frequency band voice signal with the frame synchronization information to the play end through a second synchronization link, the method comprises:
Determining a used link parameter according to the link parameter supported by the playing end and sent by the playing end;
and the source end establishes the second synchronous link with the playing end according to the used link parameters.
6. The voice frequency division transmission method according to claim 5, wherein before determining the used link parameters according to the link parameters supported by the playing end and sent by the playing end, the method comprises:
the source end sends a second synchronous link request to the playing end;
the source end receives the reply of the second synchronous link request;
and the source end determines whether to establish the second synchronous link according to the reply of the second synchronous link request.
7. The voice frequency division transmission method according to claim 1 or 2, wherein before the source end encodes the second frequency band voice signal, the method further comprises:
and the source end judges whether the playing end supports the voice frequency division transmission according to a control data stream, and the control data stream is transmitted through an asynchronous link.
8. The voice frequency division transmission method according to claim 7, wherein if the source identifies the voice frequency division transmission service through UUID, the source judging whether the play end supports the voice frequency division transmission according to the control data stream includes:
The control data stream includes a value of a custom UUID, and if the value of the custom UUID of the play end received by the source end is equal to a preset UUID value, the source end determines that the play end supports the voice frequency division transmission.
9. The voice crossover transmission method of claim 7, comprising:
if the source end determines that the playing end supports the voice frequency division transmission according to the control data stream, the source end sends an audio configuration parameter request to the playing end;
the source terminal receives audio configuration parameters corresponding to the second frequency band voice signals supported by the playing terminal, wherein the audio configuration parameters comprise coding and decoding parameters and code rates, and the coding and decoding parameters comprise one or two of the coding mode and the decoding mode;
the source end determines the used audio configuration parameters according to the audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end and sends the used audio configuration parameters to the playing end.
10. The voice frequency division transmission method according to claim 1 or 2, comprising:
the number of the second synchronous links is smaller than or equal to the number of the frequency bands of the second frequency band voice signals;
The source end disconnects one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links; or alternatively
And the source end establishes one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links.
11. A voice frequency division transmission method, comprising:
before a second synchronous link is established, a playing end receives an encoded first frequency band voice signal with frame synchronous information transmitted by a first synchronous link;
after the second synchronous link is established, the playing end receives the encoded first frequency band voice signal with the frame synchronous information and the encoded second frequency band voice signal with the frame synchronous information through the first synchronous link and the second synchronous link respectively;
the playing end decodes the received first frequency band voice signal and the received second frequency band voice signal;
and the playing end synchronizes the decoded first frequency band voice signal and the decoded second frequency band voice signal through the frame synchronization information.
12. The voice frequency division transmission method according to claim 11, wherein after the playing end synchronizes the decoded first band voice signal and the decoded second band voice signal through the frame synchronization information, the method comprises:
The playing end respectively carries out digital-to-analog conversion on the synchronized first frequency band voice signal and the synchronized second frequency band voice signal through one or more different digital-to-analog converters;
the playing end respectively amplifies the digital-to-analog converted first frequency band voice signal and the digital-to-analog converted second frequency band voice signal through one or more different amplifiers;
the playing end performs electroacoustic conversion on the amplified first frequency band voice signal and the amplified second frequency band voice signal through one or more different electroacoustic converters respectively.
13. The voice frequency division transmission method according to claim 11 or 12, wherein before the playing end receives the encoded second frequency band voice signal with the frame synchronization information through the second synchronization link, the method comprises:
the playing end sends a control data stream to the source end so that the source end judges whether the playing end supports the voice frequency division transmission or not according to the control data stream.
14. The voice crossover transmission method of claim 13, comprising:
if the source terminal determines that the playing terminal supports the voice frequency division transmission according to the control data stream, the playing terminal receives a second synchronous link request sent by the source terminal and sends a reply of the second synchronous link request;
And if the playing end supports the voice frequency division transmission, the playing end sends the link parameters supported by the playing end to the source end.
15. The voice frequency division transmission method according to claim 14, wherein before the playing end receives the second synchronous link request sent by the source end, the method comprises:
the playing end receives an audio configuration parameter request sent by the source end;
the playing end sends audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end to the source end;
the playing end receives the used audio configuration parameters sent by the source end and configures the used audio configuration parameters.
16. The voice crossover transmission method according to claim 11 or 12, comprising:
the playing end disconnects one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links; or alternatively
And the playing end establishes one or more second synchronous links according to the electric quantity condition or the link quality request source end of the second synchronous links.
17. A source for voice crossover transmission, the source comprising:
The coding module is used for coding the first frequency band voice signal and the second frequency band voice signal;
the pre-synchronization module is used for marking frame synchronization information into the encoded first frequency band voice signal and the encoded second frequency band voice signal;
the link establishment module is used for establishing a second synchronous link with the playing end according to the used link parameters; and
the first sending module is used for respectively sending the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information to the playing end through a first synchronization link and the second synchronization link; before the source end establishes a second synchronous link with the playing end, the source end uses the first synchronous link to transmit the encoded first frequency band voice signal to the playing end.
18. The source terminal of claim 17, comprising:
the compression rate of the coding mode of the second frequency band voice signal is higher than that of the first frequency band voice signal; or alternatively
The compression rate of the coding mode of the second frequency band voice signal is lower than that of the first frequency band voice signal.
19. The source according to claim 17 or 18, wherein the encoding module comprises:
the high-frequency coding module is used for coding the high-frequency voice signals, and the coding mode of the high-frequency voice signals comprises a CELT coding mode or an SBR coding mode; or alternatively
The non-high frequency coding module is used for coding the non-high frequency voice signals, and the coding mode of the non-high frequency voice signals comprises a SILK coding mode, an SBC coding mode, an AAC coding mode or an MP3 coding mode.
20. The source according to claim 17 or 18, wherein the pre-synchronization module comprises:
the data frame marking module is used for marking the voice signal of any frequency band after being detected in the preset time delay as one frame of data, and the frame synchronization information comprises the starting time and the ending time of the one frame of data.
21. The source according to claim 17 or 18, wherein the source further comprises:
and the first sending module is used for determining the used link parameters according to the link parameters supported by the playing end and sent by the playing end before sending the encoded second frequency band voice signals with the frame synchronization information to the playing end through a second synchronous link.
22. The source terminal of claim 21, wherein the source terminal further comprises:
the first parameter determining module is used for sending a first synchronous link request to the playing end before determining the used link parameters according to the link parameters supported by the playing end and sent by the playing end; and
the first receiving module is used for receiving the reply of the second synchronous link request;
the first parameter determining module is further configured to determine whether to establish the second synchronous link according to a reply of the second synchronous link request.
23. The source according to claim 17 or 18, wherein the source further comprises:
and the first judging module is used for judging whether the playing end supports the voice frequency division transmission or not according to a control data stream before the coding module codes the second frequency band voice signal, and the control data stream is transmitted through an asynchronous link.
24. The source terminal of claim 23, further comprising a UUID module configured to identify a voice crossover transmission service by a UUID;
the first judging module includes:
and the second judging module is used for determining that the playing end supports the voice frequency division transmission if the received value of the custom UUID of the playing end is equal to a preset UUID value.
25. The source terminal of claim 23, wherein the source terminal further comprises:
and a third sending module: if the first judging module determines that the playing end supports the voice frequency division transmission according to the control data stream, the first judging module is used for sending an audio configuration parameter request to the playing end;
and a second receiving module: the audio configuration parameters are used for receiving audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end, the audio configuration parameters comprise coding and decoding parameters and code rates, and the coding and decoding parameters comprise one or two of the coding mode and the decoding mode; and
the second parameter determining module is used for determining the used audio configuration parameters according to the audio configuration parameters corresponding to the second frequency band voice signals supported by the playing end;
the third sending module is further configured to send the used audio configuration parameter to the playing end.
26. The source according to claim 17 or 18, wherein the source further comprises:
the first transmission control module is used for disconnecting one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links, and the number of the second synchronous links is smaller than or equal to the frequency band number of the second frequency band voice signals; or alternatively
The first transmission control module is further configured to establish the one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links, where the number of the second synchronous links is less than or equal to the number of frequency bands of the second frequency band voice signal.
27. A playback end for voice crossover transmission, the playback end comprising:
the third receiving module is used for respectively receiving the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information through the first synchronization link and the second synchronization link;
the decoding module is used for decoding the received encoded first frequency band voice signals and the encoded second frequency band voice signals;
the synchronization module is used for synchronizing the decoded first frequency band voice signal and the decoded second frequency band voice signal through the frame synchronization information;
before the second synchronous link is established, the playing end receives the encoded first frequency band voice signal with the frame synchronous information transmitted by the first synchronous link;
after the second synchronous link is established, the playing end receives the encoded first frequency band voice signal with the frame synchronous information and the encoded second frequency band voice signal with the frame synchronous information through the first synchronous link and the second synchronous link respectively.
28. The playback end of claim 27, wherein the playback end further comprises:
the digital-to-analog conversion module is used for respectively carrying out digital-to-analog conversion on the synchronized first frequency band voice signal and the second frequency band voice signal;
the one or more different amplifying modules are used for amplifying the first frequency band voice signals and the second frequency band voice signals after digital-to-analog conversion respectively; and
and the one or more different electroacoustic conversion modules are used for respectively electroacoustic converting the amplified first frequency band voice signals and the amplified second frequency band voice signals.
29. The playback end of claim 27 or 28, wherein the playback end further comprises:
and the fourth sending module is used for sending a control data stream to a source end before the third receiving module receives the coded second frequency band voice signal with the frame synchronization information through a second synchronous link, so that the source end judges whether the playing end supports the voice frequency division transmission according to the control data stream.
30. The playback end of claim 29, wherein the playback end further comprises:
A fourth receiving module, configured to receive a second synchronization link request sent by the source end if the source end determines that the play end supports the voice frequency division transmission according to the control data stream; and
a fifth sending module, configured to send a reply of the second synchronous link request;
and if the playing end supports the voice frequency division transmission, the fifth sending module is further configured to send the link parameters supported by the playing end to the source end.
31. The playback end of claim 30, wherein the playback end further comprises:
a fifth receiving module, configured to receive an audio configuration parameter request sent by the source end before the fourth receiving module receives the second synchronization link request sent by the source end;
a sixth sending module, configured to send an audio configuration parameter corresponding to the second frequency band voice signal supported by the playing end to the source end;
the fifth receiving module is further configured to receive the used audio configuration parameter sent by the source end; and
and the parameter configuration module is used for configuring the used audio configuration parameters.
32. The playback end of claim 27 or 28, wherein the playback end further comprises:
The second transmission control module is used for disconnecting one or more second synchronous links according to the electric quantity condition or the link quality of the second synchronous links; or alternatively
The second transmission control module is further configured to establish the one or more second synchronous links according to the electric quantity condition or a link quality request source end of the second synchronous link.
33. A source for voice crossover transmission, comprising: a memory and a processor;
the memory is coupled with the processor;
the memory is used for storing program instructions;
the processor is configured to invoke the program instructions stored in the memory, so that the source end executes the voice frequency division transmission method according to any one of claims 1 to 10.
34. A playback terminal for voice frequency division transmission, comprising: a memory and a processor;
the memory is coupled with the processor;
the memory is used for storing program instructions;
the processor is configured to invoke the program instructions stored in the memory, so that the playing end executes the voice frequency division transmission method according to any one of claims 11 to 16.
35. A computer-readable storage medium, comprising: a computer program stored thereon, characterized in that the computer program, when executed by a processor, implements the voice crossover transmission method according to any one of the preceding claims 1 to 10.
36. A computer-readable storage medium, comprising: a computer program stored thereon, which, when executed by a processor, implements the voice crossover transmission method according to any one of the preceding claims 11 to 16.
37. A source circuit for implementing the voice frequency division transmission method according to any one of claims 1 to 10, the source circuit comprising:
an encoder for encoding the first frequency band speech signal and the second frequency band speech signal; and
and the source end controller is connected with the encoder and is used for respectively transmitting the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information to the playing end circuit through a first synchronization link and a second synchronization link.
38. The source circuit of claim 37, further comprising a filter coupled to the encoder for separating the first frequency band speech signal and the second frequency band speech signal.
39. A playback-side circuit for implementing the voice crossover transmission method according to any one of claims 11 to 16, the playback-side circuit comprising:
a playing end controller for receiving the encoded first frequency band voice signal with the frame synchronization information and the encoded second frequency band voice signal with the frame synchronization information through a first synchronization link and a second synchronization link respectively; and
and the decoder is connected with the play end controller and used for decoding the received first frequency band voice signals and the received second frequency band voice signals.
40. The playback-side circuit of claim 39, wherein said playback-side circuit further comprises:
one or more different digital-to-analog converters respectively connected with the decoder and used for respectively performing digital-to-analog conversion on the decoded first frequency band voice signal and the decoded second frequency band voice signal;
the one or more different amplifiers are respectively connected with the one or more digital-to-analog converters and are used for respectively amplifying the digital-to-analog converted first frequency band voice signals and the digital-to-analog converted second frequency band voice signals; and
And the one or more different electroacoustic converters are respectively connected with the one or more amplifiers and are used for respectively electroacoustic converting the amplified first frequency band voice signals and the amplified second frequency band voice signals.
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