Audio processing system and audio processing method
By using audio processing systems and methods to dynamically adjust audio specifications, the problems of high cost of advanced audio equipment and insufficient adjustment of streaming platforms are solved, achieving low-cost dynamic audio optimization and equalizer effects.
Patent Information
- Application Number
- CN202410625911.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-11-21
AI Technical Summary
In the existing technology, advanced audio processing equipment is expensive, and most streaming platforms cannot adjust the audio output according to user preferences or audio-visual content, resulting in an insufficient listening experience.
An audio processing system and method are provided, which, through receiving circuitry and processing circuitry, adjusts extended display capability to identify data to optimize audio signal processing, utilizes a simple audio processing algorithm to achieve multi-channel signal conversion, and dynamically adjusts audio specifications to achieve the effect of an equalizer.
Achieving an equalizer-like listening experience at low cost, it can dynamically adjust audio output according to user preferences and audio-visual content, enhancing the listening experience.
Smart Images
Figure CN121001027A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to an audio processing system and an audio processing method, and more particularly to an audio processing system and an audio processing method with flexibly adjustable audio specifications. Background Technology
[0002] With the advancement of technology, people's reliance on high-quality audio and video has gradually increased. However, since the strength of mainstream display devices is still in image processing, they often require the support of other advanced audio processing equipment, such as home theater systems, soundbars, or amplifiers, to bring about an upgrade in sound quality.
[0003] However, the aforementioned advanced audio processing equipment is extremely expensive. Furthermore, due to the widespread use of laptops, mobile devices, and streaming platforms, most people are accustomed to using their phones or tablets as audio / video sources and connecting external displays as receivers to play videos or music. While mainstream streaming platforms can support multi-channel audio output to enhance the user's listening experience, limitations in the receiver's capabilities mean that, in most situations, the improved sound quality cannot be fully realized. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide an audio processing system and audio processing method that address the shortcomings of the prior art.
[0005] To address the aforementioned technical problems, one technical solution adopted by this invention is to provide an audio processing system suitable for an audio source device. The audio processing system includes a receiving circuit and a processing circuit. The receiving circuit is connected to the audio source device, and the processing circuit is connected to the receiving circuit. The receiving circuit adjusts the original extended display capability identification data to generate optimized extended display capability identification data, which is then read by the audio source device. The receiving circuit receives a first multi-channel signal from the audio source device based on the optimized extended display capability identification data, wherein the number of channels in the first multi-channel signal is greater than the maximum number of channels supported by the audio processing system. The processing circuit converts the first multi-channel signal into a second multi-channel signal, wherein the number of channels in the second multi-channel signal is different from the number of channels in the first multi-channel signal.
[0006] To address the aforementioned technical problems, another technical solution adopted by the present invention is to provide an audio processing method, executed by an audio processing system. The audio processing system includes a receiving circuit and a processing circuit. The audio processing method includes: adjusting original extended display capability identification data by the receiving circuit to generate optimized extended display capability identification data; providing the optimized extended display capability identification data for a sound source device to read; receiving a first multi-channel signal from the sound source device based on the optimized extended display capability identification data by the receiving circuit, wherein the number of channels in the first multi-channel signal is greater than the maximum number of channels supported by the audio processing system; and converting the first multi-channel signal into a second multi-channel signal by the processing circuit, wherein the number of channels in the second multi-channel signal is different from the number of channels in the first multi-channel signal.
[0007] One of the beneficial effects of this invention is that the audio processing system provided by this invention, unlike expensive audio processing hardware such as digital signal processors or equalizers, achieves a similar auditory experience to an equalizer through simple audio processing algorithms. Furthermore, compared to current streaming platform downmixing technologies that prioritize compatibility with most display devices on the market, resulting in a fixed downmixing technology that cannot flexibly adjust the audio emphasis according to user preferences or ideas, this invention can flexibly optimize individual channel audio for different scenarios or audio-visual content, achieving equalizer-like functionality.
[0008] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are for reference and illustration only and are not intended to limit the present invention. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the audio processing system according to the first embodiment of the present invention.
[0010] Figure 2 This is a flowchart of the audio processing method according to the first embodiment of the present invention.
[0011] Figure 3 This is a schematic diagram of the audio processing system according to the second embodiment of the present invention.
[0012] Figure 4 This is a flowchart of the audio processing method according to the second embodiment of the present invention.
[0013] Figure 5 This is a schematic diagram of the audio processing system according to the third embodiment of the present invention.
[0014] Figure 6 This is a flowchart of the audio processing method according to the third embodiment of the present invention. Detailed Implementation
[0015] The following specific embodiments illustrate the implementation of the "audio processing system and audio processing method" disclosed in this invention. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. This invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this invention. Furthermore, the accompanying drawings of this invention are for simple illustrative purposes only and are not depictions of actual dimensions; this is stated beforehand. The following embodiments will further describe the relevant technical content of this invention in detail, but the disclosed content is not intended to limit the scope of protection of this invention.
[0016] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the associated listed items.
[0017] Figure 1 This is a schematic diagram of the audio processing system according to the first embodiment of the present invention. See also... Figure 1 The audio processing system 100 includes a receiving circuit 10, a processing circuit 20, a conversion output circuit 30, and a digital-to-analog conversion circuit 40. The receiving circuit 10 is connected to the audio source device M1, the processing circuit 20 is connected to the receiving circuit 10 and the conversion output circuit 30, and the digital-to-analog conversion circuit 40 is connected to the conversion output circuit 30.
[0018] The receiving circuit 10 is used to adjust the original extended display capability identification data D1 stored in the internal memory in order to generate optimized extended display capability identification data D2, and the optimized extended display capability identification data D2 is used for the audio source device M1 to read.
[0019] The above extended display capability identification data are merely examples, and the present invention is not limited thereto. Other data that can be used to declare the capabilities of the receiving end are also applicable to the present invention, such as Display ID.
[0020] In detail, Extended Display Identification Data (EDID) is an audio-visual standard data format defined by the Video Electronics Standards Institute (VESI) in the United States. Specifically, EDID acts as an identification card for audio-visual playback devices, containing information such as the device name, product serial number, image resolution, and audio specifications. The purpose of EDID is to declare the audio-visual capabilities of an audio-visual device, ensuring that when an audio-visual source such as a computer or set-top box is connected to the playback device, the source can transmit the correct audio-visual format to the playback device based on the EDID, thus preventing situations where the playback device cannot display audio-visual data or has an incorrect aspect ratio.
[0021] Extended display capability identification data is stored in the internal memory of the audio-visual playback device and can be transmitted through some common audio-visual transmission interfaces on the market, such as DisplayPort (DP), High Definition Multimedia Interface (HDMI), and Universal Serial Bus Type C (USB Type C).
[0022] After the audio source device M1 reads the optimized extended display capability identification data D2 from the receiving circuit 10, the audio source device M1 responds to the receiving circuit 10 with a first multi-channel signal S1 and audio auxiliary data D3 based on the optimized extended display capability identification data D2. The audio auxiliary data D3 includes, for example, audio sample format data, channel location data, audio metadata, audio information frames, audio content protection data, and multi-stream audio data.
[0023] When the audio processing system 100 interacts with the audio source device M1, the audio source device M1 responds to the audio processing system 100 with an audio specification higher than the highest audio specification supported by the audio processing system 100.
[0024] For example, the audio processing system 100 supports a maximum audio specification of 4 channels. The receiving circuit 10 modifies the maximum audio specification to 6 channels to generate optimized extended display capability identification data D2. After the audio source device M1 reads the optimized extended display capability identification data D2, the audio source device M1 responds to the audio processing system 100 with a first multi-channel signal S1 based on the optimized extended display capability identification data D2, and the audio specification of the first multi-channel signal S1 is 6 channels. It is understood that the above audio specification of the first multi-channel signal S1 is only an example, and the present invention is not limited thereto.
[0025] The receiving circuit 10 announces an audio specification to the audio source device M1 that is higher than the audio receiving and playback capabilities of the audio processing system 100, inducing the audio source device M1 to output high-specification audio and audio auxiliary data. When the receiving circuit 10 receives high-specification audio, it can obtain higher content density information, thereby providing subsequent processing circuits with more information about audio acquisition or audio conversion, thus improving the capabilities of audio acquisition and audio conversion.
[0026] The receiving circuit 10 transmits a first multi-channel signal S1 and audio auxiliary data D3 to the processing circuit 20. The processing circuit 20 converts the first multi-channel signal S1 into a second multi-channel signal S2, wherein the number of channels in the second multi-channel signal S2 is different from the number of channels in the first multi-channel signal S1.
[0027] The processing circuit 20 is, for example, a microcontroller unit, whose internal memory stores time-domain audio processing algorithms. The microcontroller unit has the advantage of low cost compared to digital signal processors and equalizers, yet achieves similar functionality.
[0028] The processing circuit 20 executes a time-domain audio processing algorithm to modulate the first multi-channel signal S1. Specifically, the time-domain audio processing algorithm of the processing circuit 20 determines the number of columns and rows of the gain matrix T based on the number of channels of the first multi-channel signal S1 and the number of channels of the second multi-channel signal S2 output to the processing circuit 20. The number of columns in the gain matrix T is equal to the number of channels of the second multi-channel signal S2, and the number of rows in the gain matrix T is equal to the number of channels of the first multi-channel signal S1.
[0029] The gain matrix T described above is only one example of a time-domain audio processing method. This invention is not limited to this method, and any time-domain audio processing method can be applied to this invention.
[0030] The first multi-channel signal S1 is multiplied by the gain matrix T to generate the second multi-channel signal S2. The gain matrix T contains multiple different gain parameters. The time-domain audio processing algorithm can modulate each gain parameter individually, so that each channel of the first multi-channel signal S1 receives individual weight modulation.
[0031] For example, the first multi-channel signal S1 includes the first channel FL, the second channel FC, the third channel FR, the fourth channel LS, the fifth channel RS, and the sixth channel LFE. When the user needs to convert the six-channel signal to a two-channel signal, the first multi-channel signal S1 must be multiplied by a 2-column, 6-row matrix, as shown in the following gain matrix T:
[0032]
[0033] The first multi-channel signal S1, multiplied by the gain matrix T, generates a second multi-channel signal S2 with two channels. The second multi-channel signal S2 includes the first channel L and the second channel R, as shown in the following equation:
[0034]
[0035] The gain matrix T above is configured with two gain parameters of 0 for the sixth channel LFE to eliminate the volume of the sixth channel LFE, and with two gain parameters of negative values for the second channel FC to weaken the volume of the second channel FC.
[0036] For example, a 6-channel multi-channel signal S1 includes channel FL, channel FC, channel FR, channel LS, channel RS, and channel LFE. When a user needs to convert the 6-channel signal to 4-channel, the gain matrix T must be designed with 4 columns and 6 rows, respectively. The gain matrix T is shown in the following example:
[0037]
[0038] Furthermore, multiplying the first multichannel signal S1 by the gain matrix T generates a 4-channel second multichannel signal S2, which includes the first channel L1, the second channel R1, the third channel L2, and the fourth channel R2, as shown in the following formula:
[0039]
[0040] In the gain matrix T above, all four gain parameters for the fifth channel audio RS are set to 0, thus eliminating the volume of the fifth channel RS. The two gain parameters for the second channel audio FC are set to positive values, thus enhancing the volume of the second channel FC. The two gain parameters for the fourth channel LS are set to negative values, thus reducing the volume of the fourth channel LS.
[0041] The number of channels of the first multi-channel signal S1, the number of channels of the second multi-channel signal S2, and the gain matrix T mentioned above are merely examples, and the present invention is not limited thereto.
[0042] This allows for not only audio demixing but also dynamic modulation processing of different channels based on usage scenarios, user preferences, or differences in the audio content provided by the audio source device. For example, it can individually enhance or de-emphasize each channel, functioning similarly to an equalizer. For instance, if the music in a video provided by the audio source device is dynamic and has a strong beat, the weight of the high-frequency channels will be enhanced. Or, if a user wants to learn an actor's English pronunciation through a video and wants to avoid ambient noise interfering with the actor's voice, the weight of the channel playing vocals will be enhanced while the weight of the channel playing ambient noise will be weakened.
[0043] The conversion output circuit 30 is connected to the processing circuit 20 and the digital-to-analog conversion circuit 40. The conversion output circuit 30 converts the first digital audio format of the second multi-channel signal S2 into a second digital audio format to generate a third multi-channel signal S3, and transmits the third multi-channel signal S3 to the digital-to-analog conversion circuit 40. The number of channels in the third multi-channel signal S3 is the same as the number of channels in the second multi-channel signal S2. The digital-to-analog conversion circuit 40 is connected to at least one audio playback device M2. The digital-to-analog conversion circuit 40 converts the digital format third multi-channel signal S3 into an analog format fourth multi-channel signal S4 and transmits the fourth multi-channel signal S4 to the at least one audio playback device M2.
[0044] For example, the conversion output circuit 30 first packages the two-channel audio from the processing circuit 20 into I2S, SPDIF, or PCM format, and then transmits the two-channel audio in I2S, SPDIF, or PCM format to the digital-to-analog conversion circuit 40. The digital-to-analog conversion circuit 40 can be connected to at least one audio playback device M2, such as headphones, stereo speakers, or both. The digital-to-analog conversion circuit 40 converts the digital-format two-channel audio into analog format and plays the sound through at least one audio playback device M2.
[0045] In other embodiments, the audio processing system 100 may further include a control interface connected to the receiving circuit 10 and the processing circuit 20. The control interface allows modification of the original extended display capability identification data D1 to generate optimized extended display capability identification data D2, and also allows modification of the number of columns, rows, and each gain parameter of the gain matrix T.
[0046] For example, the control interface can be a physical keyboard, a virtual keyboard, or an application installed on a mobile device. Depending on the type of audio source, such as a game, a theater, or a speech, the user can operate the control interface to adjust each gain parameter of the gain matrix T, thereby highlighting or weakening the audio characteristics corresponding to each channel, achieving the effect of improving the listening experience at a limited cost.
[0047] Figure 2 This is a flowchart of the audio processing method according to the first embodiment of the present invention. See also... Figure 2 In step S201, the receiving circuit 10 adjusts the original extended display capability identification data D1 to generate optimized extended display capability identification data D2.
[0048] Specifically, the original extended display capability identification data D1 contains the maximum number of channels supported by the audio processing system 100. The receiving circuit 10 modifies the maximum number of channels to generate an optimized number of channels, which is greater than the maximum number of channels.
[0049] In step S202, the optimized extended display capability identification data D2 of the receiving circuit 10 is used for the audio source device M1 to read.
[0050] In step S203, the receiving circuit 10 receives the first multi-channel signal S1 and audio auxiliary data D3 in response to the audio source device M1 based on the optimized extended display capability identification data D2, and the number of channels in the first multi-channel signal S1 is greater than the maximum number of channels supported by the audio processing system.
[0051] Specifically, the receiving circuit 10 announces to the audio source device M1 an audio receiving capability and audio playback capability that are higher than those supported by the audio processing system, so as to induce the audio source device M1 to output corresponding high-specification audio and audio auxiliary data.
[0052] In step S204, the processing circuit 20 converts the first multi-channel signal S1 into a second multi-channel signal S2 using a time-domain audio processing algorithm, wherein the number of channels in the second multi-channel signal S2 is different from the number of channels in the first multi-channel signal S1.
[0053] Specifically, the time-domain audio processing algorithm designs a gain matrix T based on the number of channels of the first multi-channel signal S1 input to the processing circuit 20 and the number of channels of the second multi-channel signal S2 expected to be output by the processing circuit 20. The number of columns in the gain matrix T is equal to the number of channels of the second multi-channel signal S2, and the number of rows in the gain matrix T is equal to the number of channels of the first multi-channel signal S1. Multiple gain parameters in the gain matrix T are used to modulate the audio from multiple channels of the first multi-channel signal S1.
[0054] In step S205, the conversion output circuit 30 converts the first digital audio format of the second multi-channel signal S2 into the second digital audio format to generate the third multi-channel signal S3.
[0055] Specifically, the first digital audio format is, for example, DP or HDMI, while the second digital audio format is I2S, SPDIF, or PCM.
[0056] In step S206, the third multi-channel signal S3 is transmitted from the conversion output circuit 30 to the digital-to-analog conversion circuit 40.
[0057] In step S207, the digital-to-analog conversion circuit 40 converts the digital format third multi-channel signal S3 into an analog format to generate the fourth multi-channel signal S4.
[0058] In step S208, the digital-to-analog conversion circuit 40 transmits the fourth multi-channel signal S4 to at least one audio playback device M2.
[0059] Figure 3 This is a schematic diagram of the audio processing system according to a second embodiment of the present invention. (Comparison) Figure 3 audio processing system and Figure 1 The difference lies in the audio processing system. Figure 3 The audio processing system 100 includes a protocol conversion circuit 50, and a conversion output circuit 30 is connected to the protocol conversion circuit 50 and the processing circuit 20. The conversion output circuit 30 transmits a third multi-channel signal S3 to the protocol conversion circuit 50. The protocol conversion circuit 50 converts the second digital audio format of the third multi-channel signal S3 to a third digital audio format to generate a fifth multi-channel signal S5, wherein the number of channels of the fifth multi-channel signal S5 is the same as the number of channels of the third multi-channel signal S3. The protocol conversion circuit 50 outputs the fifth multi-channel signal S5.
[0060] For example, the conversion output circuit 30 first packages the dual-channel audio from the processing circuit 20 into I2S, SPDIF, or PCM format, and then transmits the dual-channel audio in I2S, SPDIF, or PCM format to the protocol conversion circuit 50. The protocol conversion circuit 50 is, for example, an HDMI, DP, USB Type C, MIPI, or ASA format audio / video conversion interface. The protocol conversion circuit 50 converts the I2S, SPDIF, or PCM format dual-channel audio into a dual-channel signal in HDMI, DP, USB Type C, MIPI, or ASA format and outputs dual-channel audio in HDMI, DP, USB Type C, MIPI, or ASA format.
[0061] Figure 4 This is a flowchart of the audio processing method according to the second embodiment of the present invention. (Comparison) Figure 4 Audio processing methods and Figure 2 Audio processing methods, Figure 4 Steps S401 to S405 correspond to Figure 2 The difference between steps S201 to S205 is that in step S406, the third multi-channel signal S3 is transmitted from the conversion output circuit 30 to the protocol conversion circuit 50.
[0062] In step S407, the protocol conversion circuit 50 converts the second digital audio format of the third multi-channel signal S3 into the third digital audio format to generate the fifth multi-channel signal S5.
[0063] Specifically, the second digital audio format of the third multi-channel signal S3 is, for example, I2S, SPDIF, or PCM, while the third digital audio format of the fifth multi-channel signal S5 is HDMI, DP, USB Type C, MIPI, or ASA.
[0064] In step S408, the protocol conversion circuit 50 outputs the fifth multi-channel signal S5.
[0065] Figure 5 This is a schematic diagram of an audio processing system according to a third embodiment of the present invention. (Comparison) Figure 5 audio processing system and Figure 1 The difference lies in the audio processing system. Figure 5 The audio processing system 100 includes an audio extraction device 60, and a conversion output circuit 30 is connected to the processing circuit 20 and the audio extraction device 60. The conversion output circuit 30 is used to transmit a third multi-channel signal S3 to the audio extraction device 60. The audio extraction device 60 outputs the third multi-channel signal S3.
[0066] For example, the conversion output circuit 30 first packages the two-channel audio from the processing circuit 20 into I2S, SPDIF, or PCM format, and then transmits the two-channel audio in I2S, SPDIF, or PCM format to the audio extraction device 60. The audio extraction device 60 extracts the two-channel audio in I2S, SPDIF, or PCM format and directly outputs the two-channel audio in I2S, SPDIF, or PCM format.
[0067] Figure 6 This is a flowchart of the audio processing method according to the third embodiment of the present invention. (Comparison) Figure 6 Audio processing methods and Figure 2 Audio processing methods, Figure 6 Steps S601 to S605 correspond to Figure 2The difference between steps S201 to S205 is that in step S606, the conversion output circuit 30 transmits the third multi-channel signal S3 to the audio extraction device 60. Specifically, the audio format of the third multi-channel signal S3 is, for example, I2S, SPDIF, or PCM.
[0068] In step S607, the audio extraction device 60 outputs the third multi-channel signal S3.
[0069] [Beneficial Effects of the Examples]
[0070] One of the beneficial effects of this invention is that the audio processing system and method for dynamically adjusting audio specifications provided by this invention differs from expensive audio processing hardware, such as digital signal processors or equalizers. It achieves an equalizer-like listening experience simply through a simple audio processing algorithm. Furthermore, compared to current streaming platform downmixing technologies that prioritize compatibility with most display devices on the market, resulting in a fixed downmixing technology that cannot flexibly adjust the emphasized audio components according to user preferences or ideas, this invention can flexibly optimize individual audio channels for different scenarios or audio-visual content, achieving equalizer-like functionality.
[0071] The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention specification and drawings are included in the scope of the patent application of the present invention.
[0072] [Symbol Explanation]
[0073] 100: Audio Processing System
[0074] 10: Receiving circuit
[0075] 20: Processing Circuit
[0076] 30: Conversion Output Circuit
[0077] 40: Digital-to-analog conversion circuit
[0078] 50: Protocol conversion circuit
[0079] 60: Audio extraction device
[0080] M1: Sound source device
[0081] M2: Audio playback device
[0082] D1: Original Extended Display Capability Identification Data
[0083] D2: Optimize extended display capabilities and recognize data.
[0084] D3: Audio Auxiliary Data
[0085] S1: First multi-channel signal
[0086] S2: Second multi-channel signal
[0087] S3: Third Multi-Channel Signal
[0088] S4: Fourth Multi-Channel Signal
[0089] S5: Fifth Multi-Channel Signal
[0090] T: Gain matrix
[0091] S201 to S208, S401 to S408, S601 to S607: Steps.
Claims
1. An audio processing system, applicable to an audio source device, the audio processing system comprising: A receiving circuit is connected to the sound source device; as well as A processing circuit is connected to the receiving circuit; The receiving circuit is used to adjust an original extended display capability identification data to generate an optimized extended display capability identification data, and the optimized extended display capability identification data is used for the audio source device to read. The receiving circuit receives a first multi-channel signal from the audio source device in response to the data identified by the optimized extended display capability, and the number of channels in the first multi-channel signal is greater than the maximum number of channels supported by the audio processing system. The processing circuit is used to convert the first multi-channel signal into a second multi-channel signal, wherein the number of channels of the second multi-channel signal is different from the number of channels of the first multi-channel signal.
2. The audio processing system as described in claim 1, wherein, The receiving circuit also receives audio auxiliary data from the audio source device, the audio auxiliary data including audio sampling format data, a channel location data, and audio metadata.
3. The audio processing system as described in claim 1, wherein, The processing circuit is used to process the first multi-channel signal with a gain matrix to generate the second multi-channel signal.
4. The audio processing system as described in claim 3, wherein, The gain matrix contains multiple different gain parameters, and the multiple gain parameters are respectively configured for multiple channels of the first multi-channel signal.
5. The audio processing system of claim 1 further includes a conversion output circuit and a digital-to-analog conversion circuit, the conversion output circuit being connected to the processing circuit and the digital-to-analog conversion circuit, the conversion output circuit being used to convert a first audio format of the second multi-channel signal into a second audio format to generate a third multi-channel signal and to transmit the third multi-channel signal to the digital-to-analog conversion circuit.
6. The audio processing system of claim 1 further includes a conversion output circuit and a protocol conversion circuit, the conversion output circuit being connected to the protocol conversion circuit and the processing circuit, the conversion output circuit being used to convert a first audio format of the second multi-channel signal to a second audio format to generate a third multi-channel signal, and the protocol conversion circuit being used to convert the second audio format of the third multi-channel signal to a third audio format.
7. The audio processing system of claim 1 further includes a conversion output circuit and an audio extraction device, the conversion output circuit being connected to the processing circuit and the audio extraction device, the conversion output circuit being used to convert the first audio format of the second multi-channel signal into a second audio format to generate a third multi-channel signal and to transmit the third multi-channel signal to the audio extraction device.
8. An audio processing method, performed by an audio processing system, said audio processing system comprising a receiving circuit and a processing circuit, said audio processing method comprising: The receiving circuit adjusts an original extended display capability identification data to generate an optimized extended display capability identification data. The optimized extended display capability identification data is used for reading by an audio source device; The receiving circuit receives a first multi-channel signal in response from the audio source device based on the optimized extended display capability identification data, wherein the number of channels in the first multi-channel signal is greater than the maximum number of channels supported by the audio processing system; and The processing circuit converts the first multi-channel signal into a second multi-channel signal, wherein the number of channels in the second multi-channel signal is different from the number of channels in the first multi-channel signal.
9. The audio processing method as described in claim 8, further comprising: After the optimized extended display capability identification data is used for the audio source device to read, the receiving circuit receives audio auxiliary data in response from the audio source device based on the optimized extended display capability identification data, and the audio auxiliary data includes audio sampling format data, a channel location data, and audio metadata.
10. The audio processing method as described in claim 8, wherein, Converting the first multi-channel signal into the second multi-channel signal by the processing circuit includes: processing the first multi-channel signal with a gain matrix to generate the second multi-channel signal.