Multimedia playing device and public broadcasting system

Abstract

The utility model discloses a multimedia playing device and a public broadcasting system, the device comprises a core board and a main board, the core board comprises a microprocessor unit, an audio coding and decoding unit, a switch chip, a network interface, an HDMI interface and a TF card seat; the microprocessor unit is connected with the network interface through the switch chip, and the microprocessor unit is also connected with the audio coding and decoding unit, the TF card seat and the HDMI interface; the mainboard comprises a USB interface, a loudspeaker interface, a microphone interface, an AUX IN interface and an AUX OUT interface. The USB interface is used for being externally connected with a USB flash disk, the loudspeaker interface is used for being externally connected with a loudspeaker, the microphone interface is used for being externally connected with a microphone, the AUX IN interface is used for being connected with external sound source equipment, and the AUX OUT interface is used for being connected with external sound amplification equipment. The multimedia playing equipment provided by the utility model can meet individual requirements of different users. The method can be widely applied to the technical field of playing equipment.

Description

Technical Field

[0001] This application relates to the field of playback device technology, and in particular to a multimedia playback device and a public address system. Background Technology

[0002] With technological advancements, the functionality and performance of multimedia playback devices are continuously improving, leading to their increasingly widespread application in daily life, education, and business. The technological development of multimedia playback devices is showing a diversified trend, encompassing multiple levels from basic hardware to software algorithms, with a future focus on personalized experiences and interactive innovation.

[0003] In related technologies, the availability of existing multimedia playback devices is often relatively limited. For example, they may only support playback of locally stored audio data, or require external storage devices (or audio source devices) to read and play audio data. Such multimedia playback devices have a narrow range of applications and cannot meet the personalized needs of different types of users.

[0004] In summary, the problems with the relevant technologies urgently need to be addressed. Utility Model Content

[0005] The purpose of this application is to at least partially solve one of the technical problems existing in the related art.

[0006] Therefore, one objective of this application is to provide a multimedia playback device and a public address system.

[0007] To achieve the above-mentioned technical objectives, the technical solutions adopted in the embodiments of this application include:

[0008] On one hand, embodiments of this application provide a multimedia playback device, including:

[0009] A core board and a motherboard, the core board and the motherboard being connected;

[0010] The core board includes a microprocessor unit, an audio codec unit, a switch chip, a network interface, an HDMI interface, and a TF card slot;

[0011] The microprocessor unit is connected to the network interface through the switch chip, and the microprocessor unit is also connected to the audio codec unit, the TF card slot and the HDMI interface;

[0012] The motherboard includes a USB interface, a speaker interface, a microphone interface, an AUX IN interface, and an AUX OUT interface; the USB interface is used to connect an external USB flash drive, the speaker interface is used to connect an external speaker, the microphone interface is used to connect an external microphone, the AUX IN interface is used to connect an external audio source device, and the AUX OUT interface is used to connect an external amplification device.

[0013] In addition, a multimedia playback device according to the above embodiments of this application may also have the following additional technical features:

[0014] Furthermore, in one embodiment of this application, the multimedia playback device further includes a power supply circuit.

[0015] Furthermore, in one embodiment of this application, the power supply circuit includes a DC-DC converter.

[0016] Furthermore, in one embodiment of this application, the microprocessor unit includes an STM32 chip, a digital signal processor chip, or a CS47L15 chip.

[0017] Furthermore, in one embodiment of this application, the motherboard further includes an expansion interface; the expansion interface includes an RS485 communication interface, an external power supply interface, and a differential signal input / output interface.

[0018] Furthermore, in one embodiment of this application, the multimedia playback device further includes a microphone connected to the microprocessor unit.

[0019] Furthermore, in one embodiment of this application, the multimedia playback device further includes an EMC interface, which is used to connect to an external fire alarm linkage system.

[0020] On the other hand, embodiments of this application provide a public address system, including: a host, an audio source device, a speaker, and the aforementioned multimedia playback device;

[0021] The host and the multimedia playback device are network connected, and the host is used to transmit broadcast data to the multimedia playback device; the audio source device is connected to the AUX IN interface of the multimedia playback device, and the speaker is connected to the speaker interface of the multimedia playback device.

[0022] Furthermore, in one embodiment of this application, the number of multimedia playback devices is multiple, and the host and each of the multimedia playback devices are network connected.

[0023] Furthermore, in one embodiment of this application, the public address system further includes a display screen; the display screen is connected to the HDMI interface of the multimedia playback device.

[0024] The advantages and beneficial effects of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application:

[0025] This application discloses a multimedia playback device, which includes a core board and a motherboard connected together. The core board includes a microprocessor unit, an audio codec unit, a switch chip, a network interface, an HDMI interface, and a TF card slot. The microprocessor unit is connected to the network interface via the switch chip, and is also connected to the audio codec unit, the TF card slot, and the HDMI interface. The motherboard includes a USB interface, a speaker interface, a microphone interface, an AUX IN interface, and an AUX OUT interface. The USB interface is used to connect an external USB flash drive, the speaker interface is used to connect an external speaker, the microphone interface is used to connect an external microphone, the AUX IN interface is used to connect an external audio source device, and the AUX OUT interface is used to connect an external amplification device. This multimedia playback device integrates various interfaces, making it easily applicable to various application scenarios, meeting the personalized needs of different users, and offering wide applicability and low setup costs. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following description is provided with accompanying drawings of the relevant technical solutions in the embodiments of this application or the prior art. It should be understood that the accompanying drawings described below are only for the purpose of clearly illustrating some embodiments of the technical solutions of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0027] Figure 1 A schematic diagram of a core board provided in an embodiment of this application is shown;

[0028] Figure 2 A schematic diagram of a motherboard provided in an embodiment of this application is shown;

[0029] Figure 3 This illustration shows a partial interface and component diagram of a multimedia playback device provided in an embodiment of this application;

[0030] Figure 4 A schematic diagram of a public address system provided in an embodiment of this application is shown. Detailed Implementation

[0031] The present application will be further described below with reference to the accompanying drawings and specific embodiments. The described embodiments should not be considered as limitations on the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0032] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0033] In the description of this application, it should be understood that the terms "length," "upper," "lower," "front," "rear," "left," "right," "top," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] With technological advancements, the functionality and performance of multimedia playback devices are continuously improving, leading to their increasingly widespread application in daily life, education, and business. The technological development of multimedia playback devices is showing a diversified trend, encompassing multiple levels from basic hardware to software algorithms, with a future focus on personalized experiences and interactive innovation.

[0036] In related technologies, the availability of existing multimedia playback devices is often relatively limited. For example, they may only support playback of locally stored audio data, or require external storage devices (or audio source devices) to read and play audio data. Such multimedia playback devices have a narrow range of applications and cannot meet the personalized needs of different types of users.

[0037] In view of this, this application provides a multimedia playback device and a public address system. The multimedia playback device includes a core board and a motherboard, which are connected. The core board includes a microprocessor unit, an audio codec unit, a switch chip, a network interface, an HDMI interface, and a TF card slot. The microprocessor unit is connected to the network interface through the switch chip, and is also connected to the audio codec unit, the TF card slot, and the HDMI interface. The motherboard includes a USB interface, a speaker interface, a microphone interface, an AUX IN interface, and an AUX OUT interface. The USB interface is used to connect an external USB flash drive, the speaker interface is used to connect an external speaker, the microphone interface is used to connect an external microphone, the AUX IN interface is used to connect an external audio source device, and the AUX OUT interface is used to connect an external amplification device. The multimedia playback device of this application integrates various interfaces, making it easily applicable to various application scenarios, meeting the personalized needs of different users, and offering wide applicability and low setup costs.

[0038] The following is a detailed description of a multimedia playback device provided in the embodiments of this application, with reference to the specific accompanying drawings.

[0039] This application provides a multimedia playback device, which can be applied in the field of playback device technology. Specifically, the multimedia playback device provided in this application mainly includes:

[0040] A core board and a motherboard, the core board and the motherboard being connected;

[0041] The core board includes a microprocessor unit, an audio codec unit, a switch chip, a network interface, an HDMI interface, and a TF card slot;

[0042] The microprocessor unit is connected to the network interface through the switch chip, and the microprocessor unit is also connected to the audio codec unit, the TF card slot and the HDMI interface;

[0043] The motherboard includes a USB interface, a speaker interface, a microphone interface, an AUX IN interface, and an AUX OUT interface; the USB interface is used to connect an external USB flash drive, the speaker interface is used to connect an external speaker, the microphone interface is used to connect an external microphone, the AUX IN interface is used to connect an external audio source device, and the AUX OUT interface is used to connect an external amplification device.

[0044] This application provides a multimedia playback device, including a core board and a motherboard, which are connected. The core board houses the main device components, while the motherboard integrates various interfaces, allowing users to flexibly choose which external devices to connect based on their actual needs.

[0045] Specifically, please refer to Figure 1 , Figure 1 This illustration shows a schematic diagram of a core board provided in an embodiment of this application. In this embodiment, the core board includes a microprocessor unit, an audio codec unit, a switch chip, a network interface, an HDMI interface, and a TF card slot. The microprocessor unit is the main controller of the multimedia playback device and is connected to the audio codec unit, the TF card slot, and the HDMI interface. Exemplarily, in some embodiments, the microprocessor unit may include an STM32 chip, a digital signal processor chip, or a CS47L15 chip, etc. In this embodiment, the specific chip type included in the microprocessor unit is not limited and can be flexibly selected as needed.

[0046] In this embodiment, the audio codec unit is mainly responsible for processing the encoding and decoding of digital audio signals. It can convert analog audio signals into digital format (encoding) or convert digital audio signals back into analog format (decoding) for further processing or output. Specifically, in this embodiment, the audio codec unit may include functions such as analog-to-digital conversion, digital-to-analog conversion, digital signal processing, and interface management. It can use any one of the CS42L42 chip, PCM5122 chip, or ADAU1761, and this application does not limit this.

[0047] In this embodiment, the microprocessor unit is connected to a network interface via a switch chip. The network interface can be used to cascade different multimedia playback devices. In this embodiment, the switch chip can be a BCM53 series, RTL8367 series, or similar chip.

[0048] In addition, the core board in this embodiment also includes an HDMI interface and a TF card slot. The HDMI interface can be used to connect an external display screen for video playback or information display. The TF card slot, also known as a microSD card slot, is a device for inserting and reading TF (TransFlash) cards or microSD cards. In this embodiment, the user can configure audio data by inserting a TF card or microSD card.

[0049] Reference Figure 2 , Figure 2This illustration shows a schematic diagram of a motherboard provided in an embodiment of this application. In this embodiment, the motherboard includes a USB interface, a speaker interface, a microphone interface, an AUX IN interface, and an AUX OUT interface. The USB interface can be used to connect external devices such as USB flash drives, which can also store audio data, which is then transmitted to the microprocessor unit via the motherboard. The speaker interface can be used to connect external speakers for audio playback. The microphone interface is used to connect an external microphone for broadcasting. The AUX IN interface is used to connect external audio source devices, and the AUX OUT interface is used to connect external amplification devices. This application does not limit the specific types of audio source devices and amplification devices.

[0050] In some embodiments, the multimedia playback device further includes a power supply circuit.

[0051] Specifically, in the embodiments of this application, a power supply circuit can be provided in the multimedia playback device. This power supply circuit can be connected to other power sources and can provide power to various units and components in the multimedia playback device by performing voltage conversion. For example, the power supply circuit may include a DC-DC converter to convert the input DC power into electrical energy of the required voltage level for use. This application does not limit its specific circuit structure.

[0052] In some embodiments, the motherboard further includes an expansion interface; the expansion interface includes an RS485 communication interface, an external power supply interface, and a differential signal input / output interface.

[0053] In some embodiments, the multimedia playback device further includes an EMC interface for connecting to an external fire alarm linkage system.

[0054] For example, please refer to Figure 3 , Figure 3 This illustration shows a partial diagram of the interfaces and components of a multimedia playback device provided in an embodiment of this application. For example... Figure 3 As shown, the multimedia playback device in this application embodiment may include:

[0055] USB Interface 1: For connecting an external USB flash drive; Network Interface 2: Dual-type network port, supports daisy-chaining; Speaker Interface 3: For connecting speakers or loudspeakers, rated power 50W; EMC Interface 4: Trigger port type, for connecting to an external fire alarm system; HDMI Interface 5: For connecting an external display screen to enable video playback or information display; Built-in Microphone 6: Connected to the microprocessor unit, for on-site monitoring; TF Card Slot 7: For inserting an SD card for data storage; Microphone Interface 8: For connecting an external microphone for local paging; AUX IN Interface 9: Auxiliary line input, for connecting external audio source devices; AUX OUT Interface 10: Auxiliary line output for connecting to external amplification equipment; Expansion Interface 11: Includes RS485 communication interface, external power supply interface, and differential signal input / output interface. OUT+ and OUT are differential signal outputs, IN- and IN+ are differential signal inputs, A and B are RS485 communication interfaces supporting Modbus protocol, and 24V and COM are external power supply interfaces. Expansion Interface 11 can be used to extend intercom equipment to realize intercom functions, and can also be linked with other devices through RS485 communication lines.

[0056] In this embodiment, the multimedia playback device can utilize a local area network for data transmission. It features a dual-network port design, a built-in switch chip, and supports daisy-chain connections for easy cascading cabling. Furthermore, the device includes an HDMI interface for connecting an external display screen to present video content, or for advertising. For example, advertising content can be transmitted to the multimedia playback device via a broadcast host, offering rich information and the ability to display different advertisements to different consumer groups. It features 24 / 7 playback, strong interactivity, and data monitoring capabilities.

[0057] Furthermore, the multimedia playback device in this embodiment has an EMC interface, supporting both high-level and low-level triggering, and can be used in conjunction with a fire alarm system. For example, when the fire alarm system sounds, it can send a high-level or low-level signal to the multimedia playback device, triggering it to play a preset alarm audio, serving as an emergency alarm. Simultaneously, this interface can also connect to other sensing sensors, storing the triggered playback content on an SD card, such as a human infrared sensor. When a person approaches, it can provide audio and video alerts, stopping when the person leaves, making it suitable for museums, exhibition halls, and other similar venues. In this embodiment, the multimedia playback device integrates a microphone interface, compatible with most microphones on the market. Simply insert a microphone for on-site amplification, providing strong emergency capability. The expansion interface can also connect to intercom devices, enabling communication between devices or between devices and a broadcasting station.

[0058] It is understandable that the multimedia playback device of this application integrates various interfaces, making it convenient to be used in various application scenarios, meeting the personalized needs of different users, and having a wide range of uses and low setup costs.

[0059] In this embodiment of the application, a public address system is also provided, including a host, an audio source device, a speaker, and the aforementioned multimedia playback device. (Refer to...) Figure 4 , Figure 4 This illustration shows a schematic diagram of a public address system provided in an embodiment of this application. In this embodiment, a host computer and a multimedia playback device are network-connected, and the host computer is used to transmit broadcast data to the multimedia playback device. An audio source device is connected to the AUX IN interface of the multimedia playback device, and a speaker is connected to the speaker interface of the multimedia playback device. In application, the host computer can transmit broadcast data to the multimedia playback device, and the multimedia playback device plays the transmitted broadcast data through an external speaker via the speaker interface. Furthermore, the audio source device can also input audio through the AUX IN interface and can also play audio through an external speaker. The audio source device can be of any type, and this application does not impose any restrictions on it.

[0060] like Figure 4 As shown in this embodiment, the number of multimedia playback devices in the public address system can be multiple, or it can be a single device. Furthermore, audio source devices and speakers can be used in conjunction with the multimedia playback devices. In some embodiments, the public address system may also include a display screen, which is connected to the multimedia playback device via an HDMI interface. This connection can be used to present video content or for advertising.

[0061] In the description of this specification, references to terms such as "one embodiment," "another embodiment," or "some embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A multimedia playback device, characterized in that, include: A core board and a motherboard, the core board and the motherboard being connected; The core board includes a microprocessor unit, an audio codec unit, a switch chip, a network interface, an HDMI interface, and a TF card slot; The microprocessor unit is connected to the network interface through the switch chip, and the microprocessor unit is also connected to the audio codec unit, the TF card slot and the HDMI interface; The motherboard includes a USB interface, a speaker interface, a microphone interface, an AUX IN interface, and an AUX OUT interface; the USB interface is used to connect an external USB flash drive, the speaker interface is used to connect an external speaker, the microphone interface is used to connect an external microphone, the AUX IN interface is used to connect an external audio source device, and the AUX OUT interface is used to connect an external amplification device.

2. The multimedia playback device according to claim 1, characterized in that, The multimedia playback device also includes a power supply circuit.

3. A multimedia playback device according to claim 2, characterized in that, The power supply circuit includes a DC-DC converter.

4. A multimedia playback device according to any one of claims 1-3, characterized in that, The microprocessor unit includes an STM32 chip, a digital signal processor chip, or a CS47L15 chip.

5. A multimedia playback device according to claim 1, characterized in that, The motherboard also includes expansion interfaces; the expansion interfaces include an RS485 communication interface, an external power supply interface, and a differential signal input / output interface.

6. A multimedia playback device according to claim 1, characterized in that, The multimedia playback device also includes a microphone connected to the microprocessor unit.

7. A multimedia playback device according to claim 1, characterized in that, The multimedia playback device also includes an EMC interface, which is used to connect to an external fire alarm linkage system.

8. A public address system, characterized in that, include: The host, the audio source device, the speaker, and the multimedia playback device as described in any one of claims 1-7; The host and the multimedia playback device are network connected, and the host is used to transmit broadcast data to the multimedia playback device; the audio source device is connected to the AUX IN interface of the multimedia playback device, and the speaker is connected to the speaker interface of the multimedia playback device.

9. A public address system according to claim 8, characterized in that, The number of multimedia playback devices is multiple, and the host and each of the multimedia playback devices are network connected.

10. A public address system according to claim 8, characterized in that, The public address system also includes a display screen; the display screen is connected to the HDMI interface of the multimedia playback device.

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