Audio transmission device and audio system

Abstract

This application discloses an audio transmission device and an audio system. In the audio transmission device of this application, a receiving means receives audio data transmitted from a transmitting device via a data transmission interface, a physical transceiver means receives the audio data transmitted by the receiving means via a data exchange means, and transmits the audio data received by the physical transceiver means to a playback device via the UWB transceiver means of the physical transceiver means, thereby achieving wireless transmission of audio data between the transmitting device and the playback device. The audio transmission device of this application has an ingenious structural design, which facilitates audio conversion and transmission, improves the transmission speed of audio data, and reduces the power consumption of the audio transmission device due to its low transmission power. It has strong anti-interference capabilities and high positioning accuracy, making it usable for accurate device location and positioning. It is also applicable to multi-channel audio data transmission, overcoming the drawbacks of conventional wireless audio transmission, such as high power consumption, long delays, and transmission channel congestion during multi-channel transmission.

Description

[Technical Field]

[0001] This application claims priority to a Chinese utility model application filed with the State Intellectual Property Office of the People's Republic of China on September 15, 2022, bearing application number 2023225258784 and entitled "Audio Transmission Device and Audio System," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of wireless communication, and in particular to an audio transmission device and an audio system. [Background technology]

[0003] With the continuous development of technology, wireless audio products are rapidly being introduced into many homes. Common wireless audio devices transmit audio by using 2.4G Bluetooth and WiFi technologies. Usage scenarios include an audio transmitting device, such as a mobile phone, computer, or television display, transmitting audio data to a playback device via Bluetooth or WiFi, and the playback device, such as a speaker or headphones, playing the audio corresponding to the audio data.

[0004] The advantages of 2.4G Bluetooth audio transmission are high availability, wide compatibility, and low power consumption, while the advantages of WiFi audio transmission are high availability, wide compatibility, and high bandwidth.

[0005] However, all of the above audio transmission technologies have drawbacks. For example, audio transmission using 2.4G Bluetooth can only transmit stereo signals or voice signals with average sound quality, and transmission using a complex protocol results in large delays and congestion of the transmission channel when there are many devices. Transmission using WiFi protocol has drawbacks such as high power consumption, congestion of the transmission channel when there are many devices, and long transmission delays.

[0006] Therefore, it is an urgent task to solve the drawbacks of conventional audio transmission devices, such as transmission channel congestion and large transmission delays when transmitting from many devices. Summary of the Invention

[0007] Therefore, the present application provides an audio transmission device and an audio system to solve the problems of conventional audio transmission devices, such as transmission channel congestion and large transmission delays when transmitting from many devices.

[0008] The audio transmission device according to the present application includes a housing, a receiving unit, and a physical transmitting / receiving unit, the receiving means is provided within the housing and receives audio data transmitted from a transmitting device via a data transmission interface; the physical transmitting / receiving means is provided within the housing, is connected to the receiving means via a data exchange means, and receives audio data transmitted by the receiving means; the physical transmitting / receiving means includes an UWB transmitting / receiving means for transmitting the audio data received by the physical transmitting / receiving means to a playback device; The UWB transmitting / receiving means includes a group of UWB antennas, one end of which is connected to the UWB transmitting / receiving means and the other end of which protrudes outward from the housing.

[0009] Optionally, the audio transmission device further comprises UWB receiving means provided in a playback device and wirelessly connected to the group of UWB antennas for receiving audio data transmitted from the UWB transmitting / receiving means.

[0010] Optionally, the UWB transmitting and receiving means comprises a group of UWB antennas, one end of which is connected to the physical transmitting and receiving means and the other end of which projects outward from the housing.

[0011] Optionally, the data transmission interface comprises a USB interface.

[0012] Optionally, said data exchange means comprises a serial peripheral interface having an input terminal connected to a data output terminal of said receiving means and an output terminal connected to a data input terminal of said physical transmitting / receiving means.

[0013] Optionally, said data exchange means comprises a universal asynchronous transceiver having an input terminal connected to a data output terminal of said receiving means and an output terminal connected to a data input terminal of said physical transceiving means.

[0014] Optionally, said receiving means comprises a microcontroller unit having a data input connected to an output of said USB interface.

[0015] Optionally, the receiving means comprises a ball grid array unit having data input terminals connected to output terminals of a USB interface.

[0016] Optionally, said receiving means comprises a system on chip having a data input connected to an output of a USB interface.

[0017] The present application further provides an audio system including a transmitting device, a reproducing device, and the audio transmission device, in which the transmitting device wirelessly transmits audio data to the reproducing device via the audio transmission device.

[0018] The audio transmission device of the present application realizes wireless transmission of audio data between a transmitting device and a playback device by having the receiving means receive audio data transmitted from the transmitting device via a data transmission interface, having the physical transmitting / receiving means receive the audio data transmitted by the receiving means via a data exchange means, and transmitting the audio data received by the physical transmitting / receiving means to a playback device via the UWB transmitting / receiving means of the physical transmitting / receiving means.

[0019] The audio transmission device of the present application receives audio data through a receiving means and then transmits the audio data to a physical transmitting / receiving means through a data exchange means, thereby enabling the physical transmitting / receiving means to transmit the audio signal to a playback device via UWB wireless transmission. The audio transmission device has an ingenious structural design, which facilitates audio conversion and transmission, improves the transmission speed of audio data, and has low transmission power, thereby reducing the power consumption of the audio transmission device. It also has strong anti-interference capabilities and high positioning accuracy, making it suitable for accurate device location and positioning. It is applicable to multi-channel audio data transmission, thereby overcoming the drawbacks of conventional wireless audio transmission, such as high power consumption, long delays, and congestion of transmission channels during multi-channel transmission. [Brief explanation of the drawings]

[0020] In order to more clearly describe the technical solutions in the embodiments of the present application, the following briefly describes the drawings that need to be used in the description of the embodiments. The drawings in the following description are only some embodiments of the present application, and it is obvious that those skilled in the art can derive other drawings from these drawings without any creative efforts. [Figure 1] 1 is a structural schematic diagram of an audio transmission device according to an embodiment of the present application; [Figure 2] FIG. 2 is a diagram showing the structure of an audio data packet provided in a receiving device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, the technical means in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. It is clear that the described embodiments are only a part of the embodiments of the present application, not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present application.

[0022] It should be noted that when an element is said to be "fixed" or "mounted" on another element, it may be directly located on the other element or indirectly located on the other element. When an element is said to be "connected" to another element, it may be directly connected to the other element or indirectly connected to the other element. Furthermore, the connection may be for a fixed purpose or for a circuit connection.

[0023] It should be noted that the orientations or positional relationships indicated by terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," and "outside" are based on the orientations or positional relationships shown in the drawings, and are intended merely to facilitate and simplify the description of the embodiments of the present invention, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be configured to operate in a specific orientation, and should not be understood as limiting the present invention.

[0024] Additionally, the terms "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying relative importance or the number of technical features being shown. Thus, a feature qualified by "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of the embodiments of the present application, unless otherwise clearly and specifically stated, "plurality" means two or more.

[0025] The embodiments of the present application provide an audio transmission device and an audio system.

[0026] As shown in FIG. 1, the audio transmission device according to the present application includes a housing 1, a receiving unit 2, and a physical transmitting / receiving unit 3. The receiving means 2 is provided in the housing 1 and receives audio data transmitted from a transmitting device via the data transmission interface 7; The physical transmitting / receiving means 3 is provided in the housing 1, is connected to the receiving means 2 via the data exchange means 4, and receives the audio data transmitted by the receiving means 2; the physical transmission / reception means 3 includes an UWB transmission / reception means 5 for transmitting the audio data received by the physical transmission / reception means 3 to the playback device; The UWB transmitting / receiving means 5 includes a UWB antenna group 6, one end of which is connected to the UWB transmitting / receiving means 5 and the other end of which protrudes from the housing 1 to the outside.

[0027] In some embodiments, the UWB transceiver means 5 refers to an Ultra Wide Band (UWB) transceiver means capable of transmitting and receiving radio signals.

[0028] UWB technology does not use a sine wave carrier wave, but transmits data using non-sine wave nanosecond pulses, so it is a wireless carrier communication technology that uses an extremely wide frequency band of 3.1 to 10.6 GHz. Therefore, audio data transmission using the UWB transmission / reception means 5 has the following advantages: 1. Large system capacity and fast transmission speed. According to Shannon's formula, the wider the bandwidth, the faster the maximum system transmission speed. UWB communication bandwidth is 500 MHz or more, providing sufficient transmission speed to ensure high-quality audio transmission, more channels, and more RF sleep time. 2. Low transmission power: The extremely wide bandwidth of UWB ensures low transmission power, which significantly reduces the power consumption of the system. 3. Strong anti-multipath interference capability, suitable for audio data transmission in indoor environments. 4. High positioning accuracy and extended functions such as accurate location confirmation of devices.

[0029] In a preferred embodiment of the present application, the audio transmission device further comprises UWB receiving means 8 provided in the playback device for receiving the audio data transmitted from the UWB transmitting / receiving means 5 .

[0030] In some embodiments, one end of the UWB antenna group 6 is connected to the data output terminal of the UWB transceiver means 5 and the other end is wirelessly connected to the UWB receiving means 8, and transmits the audio data received by the UWB transceiver means 5 to the playback device, i.e., the UWB antenna group 6 transmits the audio signal from the UWB transceiver means 5 to the UWB receiving means 8 on the playback device side by UWB wireless transmission. The dotted line between the UWB receiving means 8 and the UWB antenna group 6 indicates the wireless connection between them.

[0031] In some embodiments, the data transmission interface 7 includes, but is not limited to, a USB interface capable of transmitting audio data.

[0032] In some embodiments, the data exchange means 4 comprises a Serial Peripheral Interface (SPI) having an input terminal connected to the data output terminal of the receiving means 2 and an output terminal connected to the data input terminal of the physical transmitting / receiving means 3.

[0033] In some embodiments, a data input terminal of the physical transceiving means 3 is connected to a data input terminal of the UWB transceiving means 5 .

[0034] In some other embodiments, the data exchange means 4 comprises a Universal Asynchronous Receiver / Transmitter (UART) having an input terminal connected to a data output terminal of the receiving means 2 and an output terminal connected to a data input terminal of the physical transmitting / receiving means 3.

[0035] Preferably, audio data is transmitted between the receiving means 2 and the physical transmitting / receiving means 3 via a UART interface or SPI interface having high-speed transmission characteristics, thereby improving transmission efficiency. After the receiving means 2 receives the audio data via the USB interface, the audio data is converted into data that can be received by the UWB receiving means 8 and transmitted to the physical transmitting / receiving means 3. The audio data received by the physical transmitting / receiving means 3 can then be directly transmitted via the UWB transmitting / receiving means 5, thereby improving the transmission efficiency and distribution efficiency of the audio data.

[0036] In some embodiments, the receiving means 2 comprises a microcontroller unit (MCU) having a data input terminal connected to an output terminal of a USB interface and a data output terminal connected to the physical transmitting / receiving means 3 via a data exchange means 4.

[0037] In some other embodiments, the receiving means 2 comprises a Ball Grid Array (BGA) unit having a data input terminal connected to an output terminal of the USB interface and a data output terminal connected to the physical transmitting / receiving means 3 via the data exchange means 4.

[0038] In some other embodiments, the receiving means 2 comprises a system-on-a-chip (SoC) having a data input terminal connected to an output terminal of a USB interface and a data output terminal connected to the physical transmitting / receiving means 3 via a data exchange means 4.

[0039] In some embodiments, the physical transceiver 3 of the present application has UWB transceiver functions and realizes wireless transmission in accordance with standards such as IEEE 802.15.4 / 4Z, and the data packet structure has standard definitions for synchronization, transmission frame structure, RF layout, etc. During operation, the receiving means 2 only needs to perform a corresponding transmission or reception configuration on the physical transceiver 3 and read or write to the data area. After receiving audio data, the receiving means 2 can set a private data area according to user customization, and the receiving means 2 can realize transmission of audio data via the UWB transceiver 5 by simply transmitting and receiving data in the customized private data area.

[0040] In some embodiments, the receiving means 2 of the present application includes high-speed transmission compatible with UAC2.0. After receiving audio data via a USB audio data endpoint, the receiving means 2 customizes the audio data, packetizes the customized data, and then transmits it to a ring buffer. The data in the ring buffer is then transmitted to the UWB transceiver means 5 of the physical transceiver means 3 via a high-speed SPI, thereby realizing high-speed transmission of audio data between the receiving means 2 and the UWB transceiver means 5.

[0041] FIG. 2 shows the structure of an audio data packet provided in the receiving device, and the meaning of each data structure in the audio data packet is as follows: The FRAME ID is for receiver multi-channel audio frame synchronization. The CHANNEL ID indicates the channel ID of the current audio data. DATA LEN indicates the length of the current audio data. AUDIO DATA indicates uncompressed audio stream data. CMD DATA indicates system transparent transmission information whose fixed length can include status such as sampling rate, system volume, etc. The CRC checks all data from the FRAME ID to CMD DATA described above, and is intended to improve the robustness of the system.

[0042] The data structure of the audio data packet takes into consideration multi-channel usage scenarios, and can be used in multi-channel audio transmission scenarios, and has many applicable scenarios.

[0043] The present application further provides an audio system including a sending device, a playing device, and an audio transmission device, in which the sending device wirelessly transmits audio data to the playing device via the audio transmission device.

[0044] In some embodiments, the sending device is provided with an interface, such as a USB interface corresponding to a data transmission interface, for high-speed transmission of audio data to an audio transmission device via USB.

[0045] In some embodiments, transmitting devices include, but are not limited to, computers, cell phones, and televisions capable of transmitting audio data.

[0046] In some embodiments, the playback device is provided with a UWB receiving means corresponding to the UWB transmitting and receiving means of the present application, and the UWB receiving means performs UWB wireless communication with the UWB transmitting and receiving means via a group of UWB antennas to transmit audio from the transmitting device to the playback device, thereby improving the audio transmission speed and audio quality.

[0047] In some embodiments, playback devices include, but are not limited to, headphones and speakers.

[0048] In summary, the advantages of the audio transmission device and audio system of the present application are as follows: The audio transmission device of the present application receives audio data through a receiving means and further transmits the audio data to a physical transmitting and receiving means through a data exchange means, thereby enabling the physical transmitting and receiving means to transmit the audio signal to a playback device via UWB wireless transmission. The ingenious structural design makes audio conversion and transmission easy, and the use of new wireless technology overcomes the drawbacks of conventional Bluetooth audio wireless transmission, such as low bandwidth, high latency, high power consumption, and channel congestion when there are many devices. This improves the transmission speed of audio data, and the low transmission power reduces the power consumption of the audio transmission device. It also has strong anti-interference capabilities and high positioning accuracy, making it suitable for accurate device location and positioning. It is applicable to the transmission of multi-channel audio data, and optimizes audio transmission quality through wireless transmission with high bandwidth, low power consumption, and high anti-interference capabilities, for example, it can optimize the transmission of high-quality music such as music with a high sampling rate and large data volume, or more audio channels such as Dolby multi-channel, and the data transmission volume is equal to the data volume of each channel multiplied by the number of channels, thereby significantly improving the audio data transmission volume and transmission speed, and expanding the wireless audio transmission capabilities of conventional devices.

[0049] The above is a detailed description of an audio transmission device and an audio system according to the embodiments of the present application. Although the present specification uses specific examples to explain the principles and embodiments of the present application, the explanation of the above examples is merely for understanding the method and core idea of ​​the present application, and those skilled in the art may make changes to the specific embodiments and application scope based on the concept of the present application. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A housing, a receiving means, and a physical transmitting and receiving means are provided, the receiving means is provided within the housing and receives audio data transmitted from a transmitting device via a data transmission interface; the physical transmitting / receiving means is provided within the housing, is connected to the receiving means via a data exchange means, and receives audio data transmitted by the receiving means; the physical transmitting / receiving means includes an UWB transmitting / receiving means for transmitting the audio data received by the physical transmitting / receiving means to a playback device; The audio transmission device is characterized in that the UWB transmitting / receiving means comprises a group of UWB antennas, one end of which is connected to the UWB transmitting / receiving means and the other end of which protrudes outward from the housing.

2. 2. The audio transmission device according to claim 1, further comprising UWB receiving means provided in a playback device and wirelessly connected to the group of UWB antennas for receiving audio data transmitted from the UWB transmitting / receiving means.

3. 3. The audio transmission device according to claim 2, wherein the data transmission interface comprises a USB interface.

4. 3. The audio transmission device according to claim 2, wherein the data exchange means comprises a serial peripheral interface having an input terminal connected to the data output terminal of the receiving means and an output terminal connected to the data input terminal of the physical transmitting / receiving means.

5. 3. The audio transmission device according to claim 2, wherein the data exchange means comprises a general-purpose asynchronous transmitter / receiver having an input terminal connected to a data output terminal of the receiving means and an output terminal connected to a data input terminal of the physical transmitting / receiving means.

6. 4. The audio transmission device according to claim 3, wherein the receiving means comprises a microcontroller unit having a data input terminal connected to an output terminal of the USB interface.

7. 4. The audio transmission device according to claim 3, wherein the receiving means comprises a ball grid array unit having a data input terminal connected to an output terminal of a USB interface.

8. 4. The audio transmission device according to claim 3, wherein the receiving means comprises a system-on-chip having a data input terminal connected to an output terminal of a USB interface.

9. An audio system comprising a transmitting device, a playing device, and the audio transmission device according to any one of claims 1 to 8, wherein the transmitting device wirelessly transmits audio data to the playing device via the audio transmission device.

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