Method and system for realizing low-delay transmission of wireless microphone signal on computer

Abstract

The invention discloses a method and system for realizing wireless microphone signal low-delay transmission on a computer, and the method comprises the steps: collecting a sound signal through a wireless microphone module, and carrying out the communication transmission with a USB Dongle of the computer through a 2.4 G protocol; the Dongle driving module collects real-time signals of the microphone through the exposed API interface and synchronizes the real-time signals to the sound card Buffer; and taking away the signal from the sound card Buffer by using the application program module. Low-delay transmission and playing of wireless microphone signals on a computer are achieved, the problem of sound synchronization is effectively solved, stability of sound quality is ensured through protocol and module control, meanwhile, delay is controlled within 30 milliseconds, smooth audio experience is achieved, and the wireless microphone is suitable for the education industry and has wide application prospects. The sound overlapping phenomenon in the classroom environment can be avoided, the teaching quality is enhanced, and important support is provided for modern electric education.

Description

Technical Field

[0001] The present invention relates to the field of multimedia technology, and in particular to a method and system for realizing low-delay transmission of wireless microphone signals on a computer. Background Art

[0002] In the modern multimedia and education industries, wireless microphones play an important role in audio capture and transmission. However, in the existing technology, there are some challenges and limitations in the signal transmission between wireless microphones and computers.

[0003] The existing technology generally adopts the monitoring microphone solution that comes with Windows. However, this solution will cause a large delay, resulting in the inability to synchronize the sound. This delay will cause students to hear two sounds, one is the teacher's voice, and the other is the teacher's voice through the microphone and then through the computer and sound card to the speaker after amplification. This superposition and asynchrony of sounds may cause confusion and difficulty in understanding, thereby affecting the teaching effect and user experience.

[0004] like Figure 1 As shown in the left process of the prior art, the order in which the application records the wireless microphone signal from the computer through the USB dongle is: microphone-->wireless microphone dongle-->dongle driver-->sound card buffer-->sound engine coordinator-->sound card buffer-->application recording. This process may involve multiple conversion and caching steps, further increasing the risk of delay and quality loss.

[0005] like Figure 2 As shown, in the right process of the prior art, the order in which the application program enables the speaker to play sound is: application program push signal -> sound card buffer -> sound engine coordinator -> sound card buffer -> sound card driver -> speaker. This process also includes multiple steps, which may increase complexity and delay.

[0006] In general, existing technologies may have latency and synchronization issues, especially in application scenarios that require real-time transmission and playback, such as the education industry. These issues may lead to degraded sound quality and synchronization issues between sound and images, which reduces user experience and teaching effectiveness. Therefore, a more efficient and precise method is needed to solve these problems and ensure low-latency transmission and playback of wireless microphone signals on computers. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a method and system for realizing low-latency transmission of wireless microphone signals on a computer. The present invention realizes lossless transmission by not preempting the sound card, eliminates the audio transmission scheme of the acquisition and playback sound card engine, thereby ensuring that the computer processing delay is less than 30 milliseconds, realizing efficient and low-latency sound transmission and playback, and can effectively solve the deficiencies in the prior art.

[0008] The present invention is implemented by the following technical solution: a method for realizing low-delay transmission of wireless microphone signals on a computer, which is used for receiving on a computer and playing to a speaker, comprising the following steps: a) Use the wireless microphone module to collect sound signals and communicate with the computer's USB Dongle via the 2.4G protocol; b) The Dongle driver module collects the real-time signal of the microphone through the exposed API interface and synchronizes it to the sound card buffer; c) When using the application module, take the signal from the sound card buffer and control the signal to be pushed to the next sound card buffer; d) Control the data processing and transmission of the sound card buffer to ensure that the speed of taking out is faster than the speed of putting in to maintain the sound quality; e) Push the signal to the speaker through the sound card driver module for sound playback, or through the power amplifier to the speaker for playback; f) Ensure that the computer processing delay of the entire process control is less than 30 milliseconds through the delay control module; g) Synchronize the teacher’s voice and the sound played by the loudspeaker through the educational application platform to avoid overlapping sounds.

[0009] As a preferred technical solution, the 2.4G protocol can adaptively communicate and transmit with multiple wireless microphones.

[0010] As a preferred technical solution, the application module includes a user interface to allow the user to customize the processing parameters of the sound signal.

[0011] As a preferred technical solution, the sound card driver module is compatible with various types of speakers or power amplifier devices.

[0012] As a preferred technical solution, it further includes synchronization with a remote server via a wireless network so as to share sound signals among multiple classrooms.

[0013] As a preferred technical solution, the educational application platform is capable of recording and analyzing sound signals for educational evaluation and feedback.

[0014] A system for implementing a low-delay transmission method of a wireless microphone signal on a computer according to the present invention comprises: a) Wireless microphone module, used to collect sound signals and transmit them via 2.4G protocol; b) Wireless microphone Dongle module, which communicates with the wireless microphone via 2.4G protocol and receives signals; c) Dongle driver module, used to collect and synchronize microphone signals to the sound card buffer; d) Application module, used to control the entire signal processing process, including taking the signal from the sound card buffer and pushing it to the next buffer; e) Sound card driver module, used to control the signal to be pushed to the speaker for playback, or to be played through the power amplifier to the speaker; f) Educational application platform, used to synchronize the teacher's voice and the speaker's voice heard by students to avoid overlapping sounds.

[0015] As a preferred technical solution, the wireless microphone module has a noise cancellation function to eliminate background noise and optimize the collected sound signals.

[0016] As a preferred technical solution, it further includes a delay control module for real-time monitoring of the computer processing delay of the entire process and taking necessary measures to ensure that the delay is below a specific threshold.

[0017] As a preferred technical solution, it further includes a security authentication module for encrypting and authenticating the transmission of the wireless microphone signal to protect the privacy and integrity of the sound signal.

[0018] The beneficial effects of the present invention are as follows: the present invention realizes a method of transmitting a wireless microphone signal to a speaker with low latency for playback on a computer through an innovative signal processing process. Compared with the original Windows built-in listening technology solution, the new solution greatly reduces the computer processing delay (from 66 milliseconds to 28 milliseconds), shortens the time from when the wireless microphone receives the sound to when it is transmitted to the speaker through the computer, and avoids the problem of sound asynchrony; The present invention ensures normal playback of other players when adopting this method by lossless transmission without preempting the arrival of the sound card, thereby enhancing the compatibility and stability of the system; The present invention removes the audio transmission scheme of the acquisition and playback sound card engine, simplifies the transmission path, reduces processing complexity, and improves efficiency; The present invention has strong applicability and verifiability, can be widely used in teaching and other scenarios, solves the key problem of sound synchronization, and provides an effective testing and verification method; In summary, the present invention provides a method for transmitting a wireless microphone signal to a speaker on a computer with low latency for playback, thereby achieving fast, accurate and lossless transmission of sound, optimizing the sound experience, and meeting the high requirements for sound synchronization and quality in real scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The left flow chart is the original Windows built-in interception technology solution in the prior art; Figure 2 The right side flow chart is the original Windows built-in interception technology solution in the prior art; Figure 3 This is a diagram showing the effect of delay testing using an Agilent oscilloscope in the prior art; Figure 4 Collect wireless microphone flow chart for the application of the present invention; Figure 5 A flowchart for playing the application of the present invention; Figure 6 This is a diagram showing the effect of delay testing using an Agilent oscilloscope in the present invention. DETAILED DESCRIPTION

[0021] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0022] like Figure 4 and Figure 5 As shown, a method for realizing low-latency transmission of wireless microphone signals on a computer of the present invention is used for receiving and playing signals to a speaker on a computer, comprising the following steps: a) Use the wireless microphone module to collect sound signals and communicate with the computer's USB Dongle via the 2.4G protocol; b) The Dongle driver module collects the real-time signal of the microphone through the exposed API interface and synchronizes it to the sound card buffer; c) When using the application module, take the signal from the sound card buffer and control the signal to be pushed to the next sound card buffer; d) Control the data processing and transmission of the sound card buffer to ensure that the speed of taking out is faster than the speed of putting in to maintain the sound quality; e) Push the signal to the speaker through the sound card driver module for sound playback, or through the power amplifier to the speaker for playback; f) Ensure that the computer processing delay of the entire process control is less than 30 milliseconds through the delay control module; g) Synchronize the teacher’s voice and the sound played by the loudspeaker through the educational application platform to avoid overlapping sounds.

[0023] Among them, the 2.4G protocol can adaptively communicate and transmit with multiple wireless microphones.

[0024] The application module includes a user interface to allow the user to customize the processing parameters of the sound signal.

[0025] Among them, the sound card driver module is compatible with various types of speakers or power amplifier devices.

[0026] The method further includes synchronizing with a remote server via a wireless network so as to share sound signals among multiple classrooms.

[0027] The educational application platform can record and analyze sound signals for educational evaluation and feedback.

[0028] A system for implementing a low-delay transmission method of a wireless microphone signal on a computer according to the present invention comprises: a) Wireless microphone module, used to collect sound signals and transmit them via 2.4G protocol; b) Wireless microphone Dongle module, which communicates with the wireless microphone via 2.4G protocol and receives signals; c) Dongle driver module, used to collect and synchronize microphone signals to the sound card buffer; d) Application module, used to control the entire signal processing process, including taking the signal from the sound card buffer and pushing it to the next buffer; e) Sound card driver module, used to control the signal to be pushed to the speaker for playback, or to be played through the power amplifier to the speaker; f) Educational application platform, used to synchronize the teacher's voice and the speaker's voice heard by students to avoid overlapping sounds.

[0029] Among them, the wireless microphone module has a noise cancellation function to eliminate background noise and optimize the collected sound signals.

[0030] It further includes a delay control module for monitoring the computer processing delay of the entire process in real time and taking necessary measures to ensure that the delay is below a certain threshold.

[0031] A security authentication module is further included for encrypting and authenticating the transmission of the wireless microphone signal to protect the privacy and integrity of the sound signal.

[0032] In an educational environment, synchronous transmission of the teacher's voice to the student's device is a critical link. Especially in the case of remote teaching and sharing resources between multiple classrooms, clear and synchronous voice transmission is essential.

[0033] Here are the steps: a) Use the wireless microphone module to collect sound signals: The wireless microphone worn by the teacher communicates with the computer's USB Dongle through the 2.4G protocol, capturing the teacher's explanation in real time and optimizing the signal with noise elimination function.

[0034] b) Dongle driver module synchronization signal: This module collects the real-time signal of the microphone through the API interface and synchronizes it to the sound card buffer to ensure the continuous flow of sound data.

[0035] c) Synchronous processing of educational application platform: The educational software platform can synchronize the teacher’s voice and the sound played by the speaker according to needs to avoid overlapping sounds and enhance the learning experience.

[0036] d) Delay control module: The computer processing delay of the entire process is controlled to be less than 30 milliseconds to ensure the smoothness of sound playback.

[0037] e) Remote server synchronization: Synchronize with the remote server through the wireless network to achieve sound signal sharing among multiple classrooms and improve resource utilization.

[0038] In business meetings and teleconference systems, sound clarity and security are key. Wireless microphone systems must provide efficient sound collection and transmission solutions.

[0039] The specific steps are as follows: a) Wireless microphone module collects sound signals: The sound signals of the participants are transmitted to the computer or console in the conference room through the wireless microphone and 2.4G protocol.

[0040] b) Dongle driver module collects real-time signals: It collects microphone signals through the API interface and synchronizes them to the sound card buffer to ensure real-time performance.

[0041] c) The application module controls the signal flow: it controls the removal of signals from the sound card buffer and pushes them to the next sound card buffer or other devices.

[0042] d) Security authentication module: encrypts and authenticates the transmission of wireless microphone signals to protect the privacy and integrity of sound signals.

[0043] Provides flexible sound control and high-quality audio experience for complex home entertainment systems with multiple speakers and wireless microphones.

[0044] The specific steps are as follows: a) Wireless microphone module collects sound signals: The sound signals of family members are transmitted through wireless microphone and 2.4G protocol.

[0045] b) Sound card driver module compatibility processing: compatible with a variety of speakers or power amplifier devices, and flexibly connected to various audio devices.

[0046] c) Custom processing of application modules: The user interface allows users to customize the processing parameters of sound signals, such as volume, equalization, etc.

[0047] d) Delay control module: Ensure that the computer processing delay of the entire process control is less than 30 milliseconds to obtain the best audio experience.

[0048] like Figure 3 and Figure 6 As shown, the test results of the same microphone using an Agilent oscilloscope are compared (the microphone air transmission delay is fixed at 26 milliseconds). The computer processing delay of the transmission technology is 66 milliseconds, and the computer processing delay of the present invention is 28 milliseconds.

[0049] The present invention realizes a method of transmitting the wireless microphone signal to the speaker with low delay for playback on the computer through an innovative signal processing process. Compared with the original Windows built-in listening technology solution, the new solution greatly reduces the computer processing delay (from 66 milliseconds to 28 milliseconds), shortens the time from the wireless microphone receiving the sound to the time it is transmitted to the speaker through the computer, and avoids the problem of sound asynchrony; The present invention ensures normal playback of other players when adopting this method by lossless transmission without preempting the arrival of the sound card, thereby enhancing the compatibility and stability of the system; The present invention removes the audio transmission scheme of the acquisition and playback sound card engine, simplifies the transmission path, reduces processing complexity, and improves efficiency; The present invention has strong applicability and verifiability, can be widely used in teaching and other scenarios, solves the key problem of sound synchronization, and provides an effective testing and verification method; In summary, the present invention provides a method for transmitting a wireless microphone signal to a speaker on a computer with low latency for playback, thereby achieving fast, accurate and lossless transmission of sound, optimizing the sound experience, and meeting the high requirements for sound synchronization and quality in real scenarios.

[0050] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A method for realizing low-delay transmission of wireless microphone signals on a computer, for receiving on a computer and playing to a speaker, characterized in that: The following steps are involved: a) Use the wireless microphone module to collect sound signals and communicate with the computer's USB Dongle via the 2.4G protocol; b) The Dongle driver module collects the real-time signal of the microphone through the exposed API interface and synchronizes it to the sound card buffer; c) When using the application module, take the signal from the sound card buffer and control the signal to be pushed to the next sound card buffer; d) Control the data processing and transmission of the sound card buffer to ensure that the speed of taking out is faster than the speed of putting in to maintain the sound quality; e) Push the signal to the speaker through the sound card driver module for sound playback, or through the power amplifier to the speaker for playback; f) Ensure that the computer processing delay of the entire process control is less than 30 milliseconds through the delay control module; g) Synchronize the teacher’s voice and the sound played by the loudspeaker through the educational application platform to avoid overlapping sounds.

2. The method for realizing low-delay transmission of wireless microphone signals on a computer according to claim 1, characterized in that: The 2.4G protocol can adaptively communicate with multiple wireless microphones.

3. The method for realizing low-delay transmission of wireless microphone signals on a computer according to claim 1, characterized in that: The application module includes a user interface to allow the user to customize the processing parameters of the sound signal.

4. The method for realizing low-delay transmission of wireless microphone signals on a computer according to claim 1, characterized in that: The sound card driver module is compatible with various types of speakers or amplifier devices.

5. The method for realizing low-delay transmission of wireless microphone signals on a computer according to claim 1, characterized in that: Further comprising synchronizing with a remote server via a wireless network so as to share sound signals among multiple classrooms.

6. The method for realizing low-delay transmission of wireless microphone signals on a computer according to claim 1, characterized in that: The educational application platform can record and analyze sound signals for educational evaluation and feedback.

7. A system for implementing the low-delay transmission method of wireless microphone signals according to claim 1 on a computer, characterized in that: include: a) Wireless microphone module, used to collect sound signals and transmit them via 2.4G protocol; b) Wireless microphone Dongle module, which communicates with the wireless microphone via 2.4G protocol and receives signals; c) Dongle driver module, used to collect and synchronize microphone signals to the sound card buffer; d) Application module, used to control the entire signal processing process, including taking the signal from the sound card buffer and pushing it to the next buffer; e) Sound card driver module, used to control the signal to be pushed to the speaker for playback, or to be played through the power amplifier to the speaker; f) Educational application platform, used to synchronize the teacher's voice and the speaker's voice heard by students to avoid overlapping sounds.

8. The system for realizing low-delay transmission of wireless microphone signals on a computer according to claim 7, characterized in that: The wireless microphone module is equipped with noise cancellation function to eliminate background noise and optimize the collected sound signal.

9. The system for realizing low-delay transmission of wireless microphone signals on a computer according to claim 7, characterized in that: It further includes a delay control module for monitoring the computer processing delay of the entire process in real time and taking necessary measures to ensure that the delay is below a certain threshold.

10. The system for realizing low-latency transmission of wireless microphone signals on a computer according to claim 7, characterized in that: A security authentication module is further included for encrypting and authenticating the transmission of the wireless microphone signal to protect the privacy and integrity of the sound signal.

Images