CN113160837B - SBC code stream sound mixing method, device, medium and equipment - Google Patents
SBC code stream sound mixing method, device, medium and equipment Download PDFInfo
- Publication number
- CN113160837B CN113160837B CN202110414136.7A CN202110414136A CN113160837B CN 113160837 B CN113160837 B CN 113160837B CN 202110414136 A CN202110414136 A CN 202110414136A CN 113160837 B CN113160837 B CN 113160837B
- Authority
- CN
- China
- Prior art keywords
- sbc
- mixed
- mixing
- code stream
- sub
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 78
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 33
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 33
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 abstract description 20
- 230000010354 integration Effects 0.000 abstract description 3
- 229920006132 styrene block copolymer Polymers 0.000 description 113
- 238000010586 diagram Methods 0.000 description 7
- 230000003044 adaptive effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
- G10L19/02—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 using spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/0204—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 using spectral analysis, e.g. transform vocoders or subband vocoders using subband decomposition
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
- G10L19/02—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 using spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/032—Quantisation or dequantisation of spectral components
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
The invention discloses an audio mixing method of SBC code streams, which comprises the steps of respectively carrying out standard SBC decoding on a plurality of SBC code streams until the multi-phase integration step after the APCM step, and obtaining reconstructed sub-band signals corresponding to each path of SBC code stream; and superposing the reconstructed sub-band signals corresponding to the multiple SBC code streams to obtain a mixed sub-band signal. The application of the invention reduces the calculation times of the multiphase synthesis step in the sound mixing process, omits the operation of the multiphase decomposition step, effectively reduces the total calculation force requirement in the sound mixing server, reduces the operation amount in the sound mixing process, saves the power consumption, reduces the cost and ensures that the voice tone quality can not be reduced.
Description
Technical Field
The present application relates to the field of bluetooth audio encoding and decoding technologies, and in particular, to a method, an apparatus, a medium, and a device for mixing SBC code streams.
Background
SBCs, being the codecs that classic bluetooth must support, are extremely widely used and are widely used in music, telephony and conferencing systems. The audio mixing usually has two modes of centralized type and distributed type, and no matter a distributed audio mixing system or a centralized audio mixing system, in order to support more audio mixing paths, a more computationally intensive audio mixing server needs to be configured, thereby increasing the cost of the conference equipment. Moreover, both distributed sound mixing and centralized sound mixing are carried out on multiple SBC code streams, multiple multi-phase synthesis is involved, and the centralized sound mixing also involves one multi-phase decomposition. However, fixed-point operations are usually used in the multi-phase integration step and the multi-phase decomposition step in the SBC coding and decoding process, which may result in loss of precision due to word length limitation, thereby reducing sound quality, and the multi-phase integration step and the multi-phase decomposition step are complicated and large in computation amount.
Disclosure of Invention
The invention provides a SBC code stream sound mixing method, which reduces the calculation times of a multi-phase synthesis step in the sound mixing process, omits the operation of a multi-phase decomposition step, effectively reduces the total calculation force requirement in a sound mixing server, reduces the operation amount in the sound mixing process, saves the power consumption, reduces the cost and ensures that the voice tone quality cannot be reduced.
In order to solve the above problems, the present invention adopts a technical solution that: a method for mixing SBC code stream is provided, which comprises,
respectively carrying out standard SBC decoding on a plurality of SBC code streams until after the APCM step and before the multi-phase synthesis step, and obtaining a reconstructed sub-band signal corresponding to each path of SBC code stream;
and superposing the reconstructed sub-band signals corresponding to the multiple SBC code streams to obtain a mixed sub-band signal.
The invention adopts another technical scheme that: there is provided an apparatus for mixing SBC code streams, the apparatus comprising,
a module for respectively carrying out standard SBC decoding on the multiple SBC code streams until after the APCM step and before the multi-phase synthesis step to obtain a reconstructed sub-band signal corresponding to each path of SBC code stream;
and the module is used for superposing the reconstructed sub-band signals corresponding to the multiple SBC code streams to obtain a mixed sub-band signal.
In another aspect of the present invention, a computer-readable storage medium is provided, which stores computer instructions, where the computer instructions are operated to execute a method for mixing SBC streams in the aspect.
In another technical solution of the present application, a computer device is provided, which includes a processor and a memory, where the memory stores computer instructions, and the processor operates the computer instructions to execute a method for mixing SBC streams in the scheme.
The technical scheme of the invention can achieve the following beneficial effects: the invention provides the SBC code stream sound mixing method, which reduces the calculation times of a multi-phase synthesis step in the sound mixing process, omits the operation of a multi-phase decomposition step, effectively reduces the total calculation force requirement in a sound mixing server, reduces the operation amount in the sound mixing process, saves the power consumption, reduces the cost and ensures that the voice tone quality cannot be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings without inventive labor.
Fig. 1 is a schematic flow chart illustrating a specific example of performing distributed audio mixing on multiple SBC code streams in the prior art;
fig. 2 is a schematic flow chart illustrating a specific example of performing centralized sound mixing on multiple SBC code streams in the prior art;
fig. 3 is a schematic diagram of an embodiment of an SBC code stream audio mixing method according to the present invention;
fig. 4 is a schematic flowchart illustrating a specific example of performing distributed audio mixing on multiple SBC code streams according to the present invention;
fig. 5 is a schematic flow chart illustrating a specific example of performing centralized sound mixing on multiple SBC code streams according to the present invention;
figure 6 is a flow chart of a standard SBC encoding process;
figure 7 is a flow diagram of a standard SBC decoding process;
fig. 8 is a schematic structural diagram of an embodiment of an SBC code stream mixing apparatus according to the present invention.
Specific embodiments of the present application have been shown by way of example in the drawings and will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the present invention more comprehensible to those skilled in the art, and will thus provide a clear and concise definition of the scope of the present invention.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" comprises 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
In the prior art, methods for performing audio mixing on multiple SBC code streams include distributed audio mixing and centralized audio mixing.
Referring to the flowchart of the standard SBC decoding process provided in fig. 7 and the flowchart of a specific example of performing distributed audio mixing on multiple SBC code streams in the prior art provided in fig. 1, it can be known that performing distributed audio mixing on multiple SBC code streams in the prior art only involves the SBC decoding process. The process of performing distributed audio mixing on multiple SBC code streams comprises the steps of respectively performing code stream analysis on the multiple SBC code streams to obtain quantized subband signals of each path, performing bit distribution on a scale factor, performing APCM (adaptive pulse modulation) on the quantized subband signals of each path according to the scale factor grade after the bit distribution, namely performing adaptive pulse modulation to obtain reconstructed subband signals of each path, performing multi-phase synthesis on the reconstructed subband signals of each path to obtain PCM audio data of each path, wherein the process is actually the standard SBC decoding process provided by the figure 7, after each SBC code stream is subjected to the standard decoding process, overlapping the PCM audio data of each path, and performing saturation processing on the overlapped PCM audio data to obtain required mixed PCM audio data, and the required mixed PCM audio data can be output to local audio by combining practical application.
Referring to the flowchart of the standard SBC encoding process provided in fig. 6, the flowchart of the standard SBC decoding process provided in fig. 7, and the flowchart of a specific example of performing centralized audio mixing on multiple SBC code streams in the prior art provided in fig. 2, it can be known that performing centralized audio mixing on multiple SBC code streams in the prior art involves an SBC decoding process and an SBC encoding process. The process of performing centralized sound mixing on the multiple SBC code streams comprises the steps of performing the complete process of performing distributed sound mixing on the multiple SBC code streams to obtain mixed PCM audio data, performing multi-phase decomposition on the mixed PCM audio data to obtain subband signals, performing bit distribution on the proportional factors, performing APCM (adaptive pulse modulation) on the subband signals according to the scale factor grade after the bit distribution is performed, namely performing self-adaptive pulse modulation to obtain quantized subband signals, performing code stream packaging on the quantized subband signals to obtain mixed SBC code streams, wherein the process is the standard SBC coding process provided by the figure 6 actually, and can output the mixed SBC code streams to network end equipment by combining with practical application.
In summary, both distributed audio mixing and centralized audio mixing for multiple SBC code streams involve multiple multiphase synthesis, and centralized audio mixing also involves one multiphase decomposition. However, fixed-point operations are usually used in the polyphase synthesis step and the polyphase decomposition step in the SBC codec, which results in a loss of precision due to word length limitation, thereby reducing sound quality, and the polyphase synthesis step and the polyphase decomposition step are complicated and large in computation amount.
Fig. 3 is a schematic diagram illustrating an embodiment of a method for mixing SBC code streams according to the present invention.
In this embodiment, the method for mixing SBC code streams mainly includes: the process S101: respectively carrying out standard SBC decoding on a plurality of SBC code streams until after the APCM step and before the multi-phase synthesis step, and obtaining a reconstructed sub-band signal corresponding to each path of SBC code stream; the process S102: and superposing the reconstructed sub-band signals corresponding to the multiple SBC code streams to obtain a mixed sub-band signal.
In the embodiment shown in fig. 1, the SBC code stream audio mixing method of the present invention includes a process S101 of performing standard SBC decoding on multiple SBC code streams until after the APCM step and before the multi-phase synthesis step, and obtaining a reconstructed subband signal corresponding to each path of SBC code stream. The SBC code stream is decoded in the process, so that the reconstructed sub-band signals corresponding to each path of SBC code stream can be obtained, sound mixing is further performed according to the reconstructed sub-band signals, the multi-phase comprehensive step in the standard SBC decoding process is skipped, the total calculation force requirement in a sound mixing server is effectively reduced, the calculation amount in the decoding process is reduced, the power consumption is saved, the cost is reduced, and the voice tone quality is ensured not to be reduced.
In a specific example of the present invention, the process of obtaining the reconstructed subband signal corresponding to each path of SBC code stream by respectively performing standard SBC decoding on multiple paths of SBC code streams until after the step of APCM and before the step of multi-phase synthesis includes, referring to fig. 4, a flow schematic diagram of a specific example of performing distributed audio mixing on multiple paths of SBC code streams, performing code stream analysis on three paths of SBC code streams respectively to obtain quantized subband signals of each path, performing bit allocation on a scaling factor, and performing an APCM step, that is, adaptive pulse modulation, on quantized subband signals of each path according to a scaling factor level after the bit allocation is performed to obtain reconstructed subband signals of each path. Referring to fig. 5, a flowchart of a specific example of performing centralized audio mixing on multiple SBC code streams provided by the present invention, a process of specifically obtaining a reconstructed subband signal corresponding to each SBC code stream is the same as distributed audio mixing, and is not repeated.
In the specific embodiment shown in fig. 1, the method for mixing SBC code streams of the present invention includes a process S102 of superimposing reconstructed subband signals corresponding to multiple SBC code streams to obtain a mixed subband signal. In practice, the reconstructed subband signals are mixed to obtain mixed subband signals, so that the mixed subband signals can be further subjected to partial standard SBC decoding or partial standard SBC encoding, and thus mixed PCM audio data or mixed SBC code streams can be obtained.
In an embodiment of the present invention, the method for mixing an SBC code stream further includes performing multi-phase synthesis on the mixed sub-band signal to obtain mixed PCM audio data, and performing local output. The process carries out multi-phase synthesis on the mixed sub-band signals, namely standard SBC decoding is completed, the sub-band signals are converted into time domain signals, mixed PCM audio data are obtained and are locally output, and multi-phase synthesis is carried out only once to obtain the mixed PCM audio data, so that the total calculation force requirement in a mixing server in distributed mixing is reduced, the calculation amount in the decoding process is reduced, the power consumption is saved, the cost is reduced, and the voice tone quality is ensured not to be reduced.
In an embodiment of the present invention, the method for mixing an SBC code stream further includes performing saturation processing on the mixed sub-band signal before performing multi-phase synthesis on the mixed sub-band signal to obtain mixed PCM audio data. The process is convenient for reducing the possibility of saturation of the subsequent modules, thereby improving the sound quality.
Specifically, referring to fig. 4, a flow diagram of a specific example of performing distributed audio mixing on multiple SBC code streams provided by the present invention, the reconstructed sub-band signals obtained in the above example are superimposed, and the superimposed reconstructed sub-band signals are subjected to saturation processing. The multi-phase synthesis is usually carried out in the multi-phase synthesis step, and the word length limitation can cause precision loss, so that the tone quality is reduced, the multi-phase synthesis step is complex in operation and large in operation amount, but the process only needs to carry out multi-phase synthesis on the mixed subband signal once, and the multi-phase synthesis is not required to be carried out for multiple times as in the prior art. Finally, the sound can be output to local sound equipment in combination with practical application.
In a specific embodiment of the present invention, the SBC code stream audio mixing method further includes performing a standard SBC encoding step on the mixed subband signal, except for the multi-phase decomposition step, to obtain a mixed SBC code stream, and performing network transmission on the SBC code stream. The process omits a multi-phase decomposition step, reduces the total calculation force requirement in a sound mixing server in centralized sound mixing, reduces the calculation amount in the encoding process, saves the power consumption, reduces the cost and ensures that the voice quality cannot be reduced.
Specifically, referring to fig. 5, a flowchart of a specific example of performing centralized audio mixing on multiple SBC code streams provided by the present invention, standard SBC encoding is performed on the mixed subband signals except for the multi-phase decomposition step, so as to obtain a mixed SBC code stream. The method comprises the steps of conducting standard SBC decoding and standard SBC encoding on mixed subband signals, conducting multi-phase decomposition on the mixed subband signals, and obtaining mixed SBC code streams without conducting multi-phase decomposition once like the prior art. And finally, combining practical application, outputting the mixed SBC code stream to network side equipment.
Fig. 8 is a schematic diagram illustrating an embodiment of an apparatus for mixing SBC code streams according to the present invention.
In the embodiment shown in fig. 8, the apparatus for mixing an SBC code stream according to the present invention includes a module 801 and a module 802.
Fig. 8 shows a module 801, which is used to perform standard SBC decoding on multiple SBC code streams respectively until after the APCM step and before the multi-phase synthesis step, to obtain a reconstructed subband signal corresponding to each SBC code stream. The module decodes the SBC code stream so as to obtain the reconstructed sub-band signal corresponding to each path of SBC code stream, and further performs sound mixing according to the reconstructed sub-band signal, so that a multi-phase comprehensive step in a standard SBC decoding process is omitted, the total calculation power requirement in a sound mixing server is effectively reduced, the calculation amount in a decoding process is reduced, the power consumption is saved, the cost is reduced, and the voice tone quality is ensured not to be reduced.
Fig. 8 shows a module 802, which is a module for superimposing the reconstructed subband signals corresponding to multiple SBC code streams to obtain a mixed subband signal. The module is used for further carrying out partial standard SBC decoding or partial standard SBC coding on the mixed sub-band signal so as to obtain mixed PCM audio data or mixed SBC code stream.
In a specific embodiment of the present invention, the apparatus for mixing SBC code streams further includes a module for performing multi-phase synthesis on the mixed subband signals to obtain mixed PCM audio data and performing local output, where the module performs multi-phase synthesis on the mixed subband signals, that is, completes standard SBC decoding, converts the subband signals into time domain signals to obtain mixed PCM audio data and performs local output, and performs only one multi-phase synthesis to obtain mixed PCM audio data, thereby reducing the total computation requirement in a mixing server in distributed mixing, reducing the computation amount in the decoding process, saving power consumption, reducing cost, and ensuring that the voice quality is not reduced.
In an embodiment of the present invention, the apparatus for mixing an SBC code stream further includes a module configured to perform saturation processing on the mixed sub-band signal before performing multi-phase synthesis on the mixed sub-band signal to obtain mixed PCM audio data. The module is used for reducing the possibility of saturation of the subsequent modules, thereby improving the sound quality.
In a specific embodiment of the present invention, the apparatus for mixing SBC code streams further includes a module configured to perform a standard SBC encoding step except for the multi-phase decomposition step on the mixed subband signal to obtain a mixed SBC code stream, and perform network transmission on the SBC code stream. The module omits a multi-phase decomposition step, reduces the total calculation force requirement in a sound mixing server in centralized sound mixing, reduces the calculation amount in the encoding process, saves the power consumption, reduces the cost and ensures that the voice quality cannot be reduced.
By applying the mixing device of the SBC code stream provided by the invention, the calculation times of a multiphase comprehensive step in the mixing process are reduced, the calculation of a multiphase decomposition step is omitted, the total calculation power requirement in a mixing server is effectively reduced, the calculation amount in the mixing process is reduced, the power consumption is saved, the cost is reduced, and the voice quality is ensured not to be reduced.
The audio mixing device of the SBC code stream provided by the present invention can be used to execute the audio mixing method of the SBC code stream described in any of the above embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
In another embodiment of the present invention, a computer-readable storage medium stores computer instructions, where the computer instructions are operated to execute the method for mixing SBC code streams described in any embodiment. Wherein the storage medium may be directly in hardware, in a software module executed by a processor, or in a combination of the two.
A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
The Processor may be a Central Processing Unit (CPU), other general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), other Programmable logic devices, discrete Gate or transistor logic, discrete hardware components, or any combination thereof. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.
In one embodiment of the present application, a computer device includes a processor and a memory, the memory storing computer instructions, wherein: the processor operates the computer instructions to execute the SBC code stream mixing method described in any of the embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed system and method may be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, a division of a unit is only a logical division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above description is only an example of the present application, and is not intended to limit the scope of the present application, and all equivalent structural changes made by using the contents of the specification and drawings, or any other related technical fields, are all included in the scope of the present application.
Claims (8)
1. A method for mixing the SBC code stream is characterized by comprising the following steps,
respectively carrying out standard SBC decoding on a plurality of SBC code streams until after the APCM step and before the multi-phase synthesis step, and obtaining a reconstructed sub-band signal corresponding to each path of SBC code stream;
superposing the reconstructed sub-band signals corresponding to the multiple SBC code streams to obtain mixed sub-band signals;
and performing a standard SBC coding step except the multiphase decomposition step on the mixed sub-band signal to obtain a mixed SBC code stream, and performing network transmission on the SBC code stream.
2. The method of mixing SBC code streams according to claim 1, further comprising,
and carrying out multiphase synthesis on the mixed sub-band signals to obtain mixed PCM audio data and carrying out local output.
3. The method of mixing SBC code streams according to claim 2, wherein,
and performing saturation processing on the mixed sub-band signal before performing multiphase synthesis on the mixed sub-band signal to obtain mixed PCM audio data.
4. An SBC code stream audio mixing device is characterized by comprising,
a module for respectively carrying out standard SBC decoding on the multiple SBC code streams until the step of multi-phase synthesis is carried out after the APCM step, and obtaining a reconstructed sub-band signal corresponding to each path of SBC code stream;
a module for superposing the reconstructed sub-band signals corresponding to the multiple SBC code streams to obtain mixed sub-band signals;
and the module is used for carrying out a standard SBC coding step except the multi-phase decomposition step on the mixed sub-band signal to obtain a mixed SBC code stream and carrying out network transmission on the SBC code stream.
5. The apparatus for mixing SBC streams according to claim 4, further comprising,
and the module is used for carrying out multiphase synthesis on the mixed sub-band signals to obtain mixed PCM audio data and carrying out local output.
6. The apparatus for mixing an SBC code stream according to claim 5, further comprising,
and a module for performing saturation processing on the mixed subband signal before performing polyphase synthesis on the mixed subband signal to obtain mixed PCM audio data.
7. A computer readable storage medium storing computer instructions, wherein the computer instructions are operated to execute the method for mixing SBC code streams according to any one of claims 1 to 3.
8. A computer device comprising a processor and a memory, the memory storing computer instructions, wherein the processor operates the computer instructions to execute the method of mixing SBC codestreams of any of claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110414136.7A CN113160837B (en) | 2021-04-16 | 2021-04-16 | SBC code stream sound mixing method, device, medium and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110414136.7A CN113160837B (en) | 2021-04-16 | 2021-04-16 | SBC code stream sound mixing method, device, medium and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113160837A CN113160837A (en) | 2021-07-23 |
| CN113160837B true CN113160837B (en) | 2022-12-23 |
Family
ID=76868225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110414136.7A Active CN113160837B (en) | 2021-04-16 | 2021-04-16 | SBC code stream sound mixing method, device, medium and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113160837B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR960006368A (en) * | 1994-07-30 | 1996-02-23 | 김광호 | Multichannel Audio Encoder and Encoding Method |
| CN108389583A (en) * | 2018-07-04 | 2018-08-10 | 恒玄科技（上海）有限公司 | A kind of coding/decoding method and system of wireless Bluetooth headsets communication audio |
| CN110660401A (en) * | 2019-09-02 | 2020-01-07 | 武汉大学 | Audio object coding and decoding method based on high-low frequency domain resolution switching |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009050896A1 (en) * | 2007-10-16 | 2009-04-23 | Panasonic Corporation | Stream generating device, decoding device, and method |
-
2021
- 2021-04-16 CN CN202110414136.7A patent/CN113160837B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR960006368A (en) * | 1994-07-30 | 1996-02-23 | 김광호 | Multichannel Audio Encoder and Encoding Method |
| CN108389583A (en) * | 2018-07-04 | 2018-08-10 | 恒玄科技（上海）有限公司 | A kind of coding/decoding method and system of wireless Bluetooth headsets communication audio |
| CN110660401A (en) * | 2019-09-02 | 2020-01-07 | 武汉大学 | Audio object coding and decoding method based on high-low frequency domain resolution switching |
Non-Patent Citations (1)
| Title |
|---|
| 音频工作站MPEG-I Layer-II码流快速解码混音;肖熙等;《电声技术》;20030217(第02期);第4节 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113160837A (en) | 2021-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8548815B2 (en) | Efficient design of MDCT / IMDCT filterbanks for speech and audio coding applications | |
| JP4850837B2 (en) | Data processing method by passing between different subband regions | |
| US8392200B2 (en) | Low complexity spectral band replication (SBR) filterbanks | |
| KR101192241B1 (en) | Mixing of input data streams and generation of an output data stream therefrom | |
| CN102084418B (en) | Apparatus and method for adjusting spatial cue information of a multichannel audio signal | |
| CN102301420B (en) | Apparatus and method for upmixing a downmix audio signal | |
| US8631060B2 (en) | Fast algorithms for computation of 5-point DCT-II, DCT-IV, and DST-IV, and architectures | |
| AU2011311659B2 (en) | Apparatus and method for processing an audio signal and for providing a higher temporal granularity for a combined unified speech and audio codec (USAC) | |
| CN101611442A (en) | Code device, decoding device with and method | |
| US20220180881A1 (en) | Speech signal encoding and decoding methods and apparatuses, electronic device, and storage medium | |
| CN104718572A (en) | Audio encoding method and device, audio decoding method and device, and multimedia device employing same | |
| BR112016022466B1 (en) | method for encoding an audible signal, method for decoding an audible signal, device for encoding an audible signal and device for decoding an audible signal | |
| US8981970B2 (en) | Hierarchical coding | |
| JP2004531151A (en) | Method and apparatus for processing time discrete audio sample values | |
| CN103413553A (en) | Audio coding method, audio decoding method, coding terminal, decoding terminal and system | |
| CN113160837B (en) | SBC code stream sound mixing method, device, medium and equipment | |
| KR20130086619A (en) | Speech signal encoding method and speech signal decoding method | |
| JP5215404B2 (en) | Effective implementation of analysis and synthesis filter banks for MPEG AAC and MPEG AAC ELD encoder / decoder | |
| JP2000236543A (en) | Method for coding or decoding audio or video frame data and its system | |
| CN102419978B (en) | Audio decoder and frequency spectrum reconstructing method and device for audio decoding | |
| Cho et al. | Implementation of an object audio system based on MPEG-4 audio lossless coding on DSP | |
| JP7485037B2 (en) | Sound signal decoding method, sound signal decoding device, program and recording medium | |
| JP7491376B2 (en) | Audio signal encoding method, audio signal encoding device, program, and recording medium | |
| CN102568489B (en) | Scrambler | |
| Singh et al. | pLayer-i An internet based muzik player |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: A1009, floor 9, block a, No. 9, Shangdi Third Street, Haidian District, Beijing 100085 Patentee after: Beijing Bairui Internet Technology Co.,Ltd. Address before: 7-1-1, building C, 7 / F, building 2-1, No.2, Shangdi Information Road, Haidian District, Beijing 100085 Patentee before: BARROT WIRELESS Co.,Ltd. |
|
| CP03 | Change of name, title or address |