CN220173319U - Reusable audio-video electronic device - Google Patents
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- CN220173319U CN220173319U CN202321433786.7U CN202321433786U CN220173319U CN 220173319 U CN220173319 U CN 220173319U CN 202321433786 U CN202321433786 U CN 202321433786U CN 220173319 U CN220173319 U CN 220173319U
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Abstract
The utility model relates to a reusable audio and video electronic device, which comprises an audio and video computing and storing board card, an inter-board connecting unit and an audio and video coding and decoding module, wherein the inter-board connecting unit comprises an audio and video transmission unit and a network transmission unit, a display circuit of the audio and video computing and storing board card is connected with the audio and video coding and decoding module through the audio and video transmission unit, the audio and video computing and storing board card is connected with the audio and video coding and decoding module through the network transmission unit, the audio and video computing and storing board card transmits computer images to the audio and video coding and decoding module, the audio and video coding and decoding module synthesizes the computer images and video images obtained by decoding video code streams transmitted from a far end and stored in a local network, and outputs the video images to the audio and video computing and storing board card for display and playing, so as to realize the audio and video terminal function, and the audio and video server function of mutually converting H.265/H.264 media streams through the audio and video coding and decoding module.
Description
Technical Field
The utility model relates to the technical field of audio and video scheduling, in particular to a reusable audio and video electronic device.
Background
In the related art, when the manufacturers of the audio and video server and the manufacturers of the audio and video terminal are performing product design and manufacture, the manufacturers are only responsible for designing the computing platform for processing the audio and video, so that when the audio and video terminal and the audio and video server are produced, the manufacturers of the computer are required to produce the computer equipment and the audio and video encoding and decoding equipment respectively, and then the functions of the audio and video terminal and the audio and video server are realized in a cable connection mode.
In the related art, on a computer platform based on an X86 architecture, a central processing unit is provided with a high-performance display processing core unit, and can process high-definition image multi-channel decoding output display in a mode of software decoding and playing, and can also process H.265 and H.264 media compressed code stream conversion in a mode of software decoding and software encoding; however, on some computing platforms, due to the lack of a high-performance display processing core, the function of multiplexing and outputting high-definition images can be realized only through a specific display chip, and meanwhile, when the performance of the display chip is insufficient, the corresponding computing platform cannot process the software decoding of multiple complex H.265 image code streams and the conversion of H.265 and H.264 media compression code streams.
Aiming at the problem that a computing platform for processing audio and video in the related art cannot realize software decoding of multipath complex H.265 image code streams and conversion of H.265 and H.264 media compression code streams, no better technical scheme exists yet.
Disclosure of Invention
The utility model provides a reusable audio and video electronic device, which at least solves the problems that a computing platform for processing audio and video in the related art cannot realize software decoding of multipath complex H.265 image code streams and conversion of H.265 and H.264 media compression code streams.
In a first aspect, the utility model provides a reusable audio and video electronic device, comprising an audio and video computing memory board card, an inter-board connection unit and an audio and video coding and decoding module, wherein the inter-board connection unit comprises an audio and video transmission unit and a network transmission unit, the audio and video computing memory board card comprises a display circuit, the display circuit is electrically connected with the audio and video coding and decoding module in a coupling way through the audio and video transmission unit, the audio and video computing memory board card is also connected with the audio and video coding and decoding module in a network way through the network transmission unit,
the audio/video computing storage board is used for transmitting a first video image to the audio/video encoding and decoding module through the audio/video transmission unit and transmitting an H.264/H.265 image to the audio/video encoding and decoding module through the network transmission unit;
the audio/video encoding and decoding module is used for decoding a first video code stream and a locally stored second video code stream transmitted by a remote server, synthesizing a video image obtained by decoding and the first video image into a video picture, transmitting the video picture to the audio/video computing and storing board card through the audio/video transmission unit, and transcoding the received H.264/H.265 image.
In some embodiments, the multiplexing audio and video electronic device further includes a power module, where the power module is electrically connected to the audio and video computing and storing board card, the board-to-board connection unit, and the audio and video encoding and decoding module, and is configured to provide voltages with preset voltage values for the audio and video computing and storing board card, the board-to-board connection unit, and the audio and video encoding and decoding module, respectively.
In some of these embodiments, the network transmission unit includes an ethernet transmission circuit and/or a serial-to-parallel converter Serdes transmission circuit.
In some embodiments, the audio/video encoding/decoding module includes an ethernet transceiver chip, where an Rg45 port of the ethernet transceiver chip is in butt joint with one end of the ethernet transmission circuit, and the other end of the ethernet transmission circuit is in butt joint with an Rg45 network port of the audio/video computing memory board card; the serial network port of the Ethernet transceiver chip is in butt joint with one end of the Serdes transmission circuit, and the other end of the Serdes transmission circuit is in butt joint with the Serdes port of the audio/video computing storage board card.
In some embodiments, the audio/video codec module is electrically connected to an HDMI interface of the audio/video codec module, and is configured to convert a video image generated by processing by the audio/video codec module into a corresponding HDMI video signal.
In some embodiments, the audio/video codec module further includes a video conversion chip and a VGA interface, the HDMI interface is electrically connected to a data input port of the video conversion chip, a video transmission port of the video conversion chip is electrically connected to the VGA interface, and at least one of the VGA interface and the HDMI interface is electrically connected to the audio/video transmission unit, where the video conversion chip is configured to convert an HDMI video signal output by the audio/video codec module along the HDMI interface into a VGA signal.
In some of these embodiments, the audio video codec module further comprises a microcontroller and a memory, wherein,
the micro controller is used for decoding a first video code stream and a locally stored second video code stream transmitted by the remote server, synthesizing a video image obtained by decoding and the first video image into a video picture, transmitting the video picture to the audio/video computing and storing board card through the audio/video transmission unit, and transcoding a received H.264/H.265 image;
the memory is at least used for locally storing the second video code stream and/or caching the received H.264/H.265 images.
In some embodiments, the audio video computing memory card comprises an audio video computing card of a standard 6U VPX architecture.
Compared with the related art, the embodiment provides a multiplexing audio and video electronic device, an inter-board connection unit connects an audio and video computing and storing board card and an audio and video coding and decoding module, a display circuit of the audio and video computing and storing board card transmits computer images to the audio and video coding and decoding module through the inter-board connection unit, the audio and video coding and decoding module decodes a first video code stream transmitted by a remote server and a locally stored second video code stream, and synthesizes a picture of a video image obtained by decoding and a first video image provided by the audio and video computing and storing board card, and outputs the synthesized picture to the audio and video computing and storing board card for display and playing through the inter-board connection unit, so that an audio and video terminal function is realized; the audio/video computing and storing board card transmits the H.265/H.264 images to the audio/video encoding and decoding module through the network transmission unit to be transcoded, so that media conversion is realized, the audio/video server function of mutually converting the H.265/H.264 media streams is realized, the problem that a computing platform for processing audio/video cannot realize software decoding of multiple complex H.265 image code streams and conversion of H.265 and H.264 media compression code streams in the related technology is solved, and the beneficial effects of the reusable audio/video terminal function and the audio/video server function are realized.
The details of one or more embodiments of the utility model are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the other features, objects, and advantages of the utility model.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a block diagram of a reusable audio/video electronic device according to an embodiment of the present utility model;
FIG. 2 is a block diagram of a reusable audio-video electronic device in accordance with a preferred embodiment of the present utility model;
FIG. 3 is a block diagram of a multiplexed audio and video electronic device including a topology of the RGMII switch RJ45 and Serdes networks in accordance with a preferred embodiment of the present utility model;
fig. 4 is a schematic diagram of a data flow between an audio/video computing memory board and an audio/video codec module according to an embodiment of the present utility model;
fig. 5 is a block diagram of a multiplexing audio/video electronic device including a MIPI-to-HDMI topology according to a preferred embodiment of the present utility model;
fig. 6 is a schematic diagram of a converted data flow of an HDMI signal of an audio/video codec module according to a preferred embodiment of the present utility model;
fig. 7 is a block diagram of a multiplexing audio/video electronic device according to a preferred embodiment of the present utility model, which includes a topology diagram of HDMI to VGA output;
fig. 8 is a schematic diagram of a conversion data flow of VGA signals of an audio/video codec module according to a preferred embodiment of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The technical solutions in the embodiments of the present utility model will be described below with reference to the accompanying drawings in the embodiments of the present utility model.
Fig. 1 is a block diagram of a multiplexing audio/video electronic device according to an embodiment of the present utility model. As shown in fig. 1, an embodiment of the present utility model provides a reusable audio/video electronic device, including: the audio/video computing memory board 100, the board connecting unit 200 and the audio/video encoding/decoding module 300, the board connecting unit 200 comprises an audio/video transmission unit 21 and a network transmission unit 22, the audio/video computing memory board 100 comprises a display circuit, the display circuit is electrically connected with the audio/video encoding/decoding module 300 through the audio/video transmission unit 21 in a coupling way, the audio/video computing memory board 100 is also connected with the audio/video encoding/decoding module 300 through the network transmission unit 22 in a network way, wherein,
the audio/video computing memory card 100 is configured to transmit a first video image (computer image) to the audio/video codec module 300 through the audio/video transmission unit 21, and transmit an h.264/h.265 image to the audio/video codec module 300 through the network transmission unit 22.
In this embodiment, the audio/video computing memory card 100 includes, but is not limited to, a conventional audio/video computing card of standard 6U VPX architecture; specifically, the audio and video computing and storing board 100 adopts a Loongson 3A3000 chip as a processor, is matched with a 7A1000 bridge chip, and adopts 16 audio and video computing boards with 1GB of ultraviolet light storage patch memories.
The audio/video encoding/decoding module 300 is configured to decode a first video code stream and a locally displayed second video code stream transmitted from a remote server through a network interface when used as an audio/video terminal function, synthesize a video image (corresponding to the first video code stream and the second video code stream) obtained by decoding and the first video image into a video picture, transmit the video picture to the audio/video computing memory card 100 through the audio/video transmission unit 21, and transcode a received h.264/h.265 image when used as a media server function, that is, process h.265 and h.264 media compression code stream conversion, so as to facilitate access to an audio/video scheduling system to which different media streams are applied.
In an optional implementation manner of the embodiment of the present utility model, the audio/video codec module in the present utility model may be applied to different video synthesis scenes, for example, synthesis of surveillance video, synthesis of video images of a video conference, and so on. Taking video image synthesis of a video conference as an example, if 1 requirement for accessing the video conference exists in the current local area and 3 requirements for accessing the video conference exist in the external area, the audio/video coding/decoding module can acquire the 3 external first video code streams from the remote server through the network interface, and acquire 1 local second video code stream for accessing the video conference, so as to decode the 3 first video code streams and the 1 second video code stream. The first video image in the present utility model may be a video conference image that needs to be displayed in the current display in a video conference, for example, a nine-grid image, that is, each grid image displays an image of one video stream, or may be a first video image that is adaptive to the number of current video streams, for example, only 4 video images are displayed on the first image when only 4 video code streams need to be displayed, and the size of the first video image is adaptively adjusted, and if other people need to join the video conference, the size of the video image is reduced in the first video image. Based on the above, after the 3 first video code streams and the 1 second video code streams are decoded to obtain video images, the video images are further synthesized with the first video images to obtain the video conference images to be displayed currently.
In this embodiment, when implementing the function of the audio/video terminal, the audio/video codec module 300 is connected to the remote server through a network, and the remote server can transmit the first video code stream to the audio/video codec module 300, and meanwhile, the audio/video codec module 300 itself also locally stores or displays the corresponding second video code stream, and the audio/video codec module 300 decodes the first video code stream and the second video code stream to obtain corresponding video images, and then, the audio/video codec module 300 synthesizes the video images obtained by decoding with the first video image (corresponding computer image) transmitted by the audio/video computing memory card 100 through the audio/video transmission unit 21, thereby completing the functions of video decoding, screen mixing and picture synthesis; in this embodiment, when implementing the audio/video terminal function, the audio/video codec module 300 processes h.265 and h.264 media compression bitstream conversion.
In this embodiment, the audio/video encoding/decoding module 300 is used to complete the functions of video decoding, screen mixing, picture synthesis, audio decoding and audio mixing output, so as to solve the problem that the soft decoding capability of 1800P30 frame images in 16-channel h.264/h.265 network video compression format cannot be insufficient due to the poor operation capability of the audio/video computing memory board 100; meanwhile, when the audio/video service board is used as an audio/video service board, the audio/video coding/decoding module 300 is responsible for performing media conversion, so as to process H.265 and H.264 media compression code stream conversion.
In the above reusable audio/video electronic device, the board-to-board connection unit 200 connects the audio/video computing storage board 100 and the audio/video codec module 300, the display circuit of the audio/video computing storage board 100 transmits the computer image to the audio/video codec module 300 through the board-to-board connection unit 200, then the audio/video codec module 300 decodes the first video code stream transmitted by the remote server and the locally stored second video code stream, synthesizes the decoded video image and the first video image provided by the audio/video computing storage board 100, and outputs the synthesized image to the display circuit of the audio/video computing storage board 100 for display and playing through the audio/video transmission unit 21 of the board-to-board connection unit 200, thereby realizing the audio/video terminal function; the audio/video computing storage board 100 transmits the H.265/H.264 images to the audio/video encoding/decoding module 300 through the network transmission unit 21 for transcoding, so as to realize media conversion, achieve the audio/video server function of mutually converting the H.265/H.264 media streams, solve the problem that a computing platform for processing the audio/video cannot realize software decoding of multiple complex H.265 image code streams and conversion of H.265 and H.264 media compression code streams in the related art, and realize the beneficial effects of the multiplexing audio/video terminal function and the audio/video server function.
Fig. 2 is a block diagram of a multiplexing audio/video electronic device according to a preferred embodiment of the present utility model, in order to enable the audio/video computing memory card 100, the inter-board connection unit 200, and the audio/video codec module 300 to work in a matching manner, referring to fig. 2, in some embodiments, the multiplexing audio/video electronic device further includes a power module 400, where the power module 400 is electrically connected to the audio/video computing memory card 100, the inter-board connection unit 200, and the audio/video codec module 300, respectively, and is configured to provide voltages of preset voltage values to the audio/video computing memory card 100, the inter-board connection unit 200, and the audio/video codec module 300, respectively.
In the present embodiment, the voltage of the preset voltage value provided by the power module 400 includes 24V, 12V, 5V, 3.3V, 1.8V, and 1.2V.
In this embodiment, the audio/video computing memory board 100 and the audio/video codec module 300 may be respectively provided with a corresponding power module 400, for example: the power adapter and the signal voltage corresponding to the inter-board connection unit 200 are voltages for outputting and inputting corresponding signals on the audio/video computing storage board 100 side and the audio/video codec module 300 side respectively.
In this embodiment, the power module 400 includes, but is not limited to, a dc switching power supply.
To achieve direct transmission of the h.264/h.265 images by the audio video computing storage card 100 and the audio video codec module 300, in some embodiments, the network transmission unit 22 includes an ethernet transmission circuit and/or a serial-to-serial-parallel converter Serdes transmission circuit.
Fig. 3 is a block diagram of a multiplexing audio/video electronic device including a topology diagram of an RGMII conversion RJ45 and a Serdes network according to a preferred embodiment of the present utility model, fig. 4 is a schematic diagram of a data flow between an audio/video computing and storing board card and an audio/video codec module according to an embodiment of the present utility model, and for implementing a network function of the audio/video codec module 100, referring to fig. 3 and fig. 4, in some embodiments, the audio/video codec module 300 includes an ethernet transceiver chip, an Rg45 port of the ethernet transceiver chip is in butt joint with one end of an ethernet transmission circuit, and the other end of the ethernet transmission circuit is in butt joint with an Rg45 port of the audio/video computing and storing board card 100; the serial network port of the Ethernet transceiver chip is in butt joint with one end of a Serdes transmission circuit, and the other end of the Serdes transmission circuit is in butt joint with the Serdes port of the audio/video computing storage board card.
Referring to fig. 4, when data transmission is performed between the audio/video codec module 300 and the audio/video computing and storing board 100, the following four data transmission modes may be adopted: 1. the audio and video data are transmitted among the decoding unit of the audio and video encoding and decoding module 300, the SERDES serial network port, the SERDES transmission circuit, the SERDES serial network port and the audio and video computing and storing board card 100; 2. the audio and video data are transmitted among the decoding unit of the audio and video encoding and decoding module 300, the SERDES serial network port, the Ethernet transmission circuit, the RJ45 network port and the audio and video computing and storing board card 100; 3. the audio and video data are transmitted among the coding unit of the audio and video coding and decoding module 300, the RJ45 network port, the SERDES transmission circuit, the SERDES serial network port and the audio and video computing and storing board card 100; 4. the audio and video data are transmitted among the coding unit, the RJ45 network port, the Ethernet transmission circuit, the RJ45 network port and the audio and video computing and storing board card 100 of the audio and video coding and decoding module 300; in this embodiment, through modes 1 to 4, the network function of the audio/video codec module 300 is implemented, so that the audio/video computing and storing board 100 transmits the first video image to the audio/video codec module 300, and transmits the h.264/h.265 image to the audio/video codec module 300.
In this embodiment, the ethernet transceiver chip includes, but is not limited to, an RTL8211FS chip.
Fig. 5 is a block diagram of a multiplexing audio/video electronic device including a MIPI-to-HDMI topology according to a preferred embodiment of the present utility model, fig. 6 is a schematic diagram of a conversion data flow of an HDMI signal of an audio/video codec module according to a preferred embodiment of the present utility model, and referring to fig. 5 and 6, in order to convert an image signal into an HDMI signal, in some embodiments, the audio/video codec module 300 further includes an LT9611UX chip, an output port of the LT9611UX chip is electrically connected to an HDMI interface of the audio/video codec module (through a corresponding data GPIO port), where the LT9611UX chip is configured to convert a video image generated by processing of the audio/video codec module 300 into a corresponding HDMI video signal.
Fig. 7 is a block diagram of a multiplexing audio/video electronic device according to a preferred embodiment of the present utility model, wherein the block diagram includes a topology diagram of converting HDMI to VGA output, fig. 8 is a schematic diagram of a conversion data flow of VGA signals of an audio/video codec module according to a preferred embodiment of the present utility model, and in order to convert HDMI signals into standard video signals, referring to fig. 7 and 8, in some embodiments, the audio/video codec module 300 further includes a video conversion chip and a VGA interface, the HDMI interface is electrically connected to a data input port of the video conversion chip, a video transmission port of the video conversion chip is electrically connected to the VGA interface, and at least one of the VGA interface and the HDMI interface is electrically connected to the audio/video transmission unit, wherein the video conversion chip is configured to convert HDMI video signals outputted by the audio/video codec module 300 along the HDMI interface into VGA signals.
In the present embodiment, the video conversion chip includes, but is not limited to, an AG6200 chip; in this embodiment, referring to fig. 8, the audio/video codec module 300 is provided with an HDMI interface and a VGA interface, and the HDMI interface is electrically connected with the video conversion chip through a corresponding data signal line inside, so as to convert the HDMI video signal output by the audio/video codec module 300 into a VGA signal and output the VGA signal along the VGA interface.
In some of these embodiments, the audio video codec module 300 further includes a microcontroller and a memory, wherein,
the micro controller is used for decoding the first video code stream and the locally stored second video code stream transmitted by the remote server, synthesizing the decoded video image and the first video image into a video picture, transmitting the video picture to the audio/video computing memory board card through the audio/video transmission unit, and transcoding the received H.264/H.265 image.
And the memory is at least used for locally storing the second video code stream and/or caching the received H.264/H.265 images.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include others that are expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The reusable audio and video electronic device is characterized by comprising an audio and video computing and storing board card, an inter-board connecting unit and an audio and video encoding and decoding module, wherein the inter-board connecting unit comprises an audio and video transmission unit and a network transmission unit, the audio and video computing and storing board card comprises a display circuit, the display circuit is electrically connected with the audio and video encoding and decoding module in a coupling way through the audio and video transmission unit, the audio and video computing and storing board card is also connected with the audio and video encoding and decoding module in a network way through the network transmission unit,
the audio/video computing storage board is used for transmitting a first video image to the audio/video encoding and decoding module through the audio/video transmission unit and transmitting an H.264/H.265 image to the audio/video encoding and decoding module through the network transmission unit;
the audio/video encoding and decoding module is used for decoding a first video code stream and a locally stored second video code stream transmitted by a remote server, synthesizing a video image obtained by decoding and the first video image into a video picture, transmitting the video picture to the audio/video computing and storing board card through the audio/video transmission unit, and transcoding the received H.264/H.265 image.
2. The reusable audio-video electronic device as recited in claim 1, further comprising a power module electrically connected to the audio-video computing memory board card, the inter-board connection unit, and the audio-video codec module, respectively, and configured to provide voltages of preset voltage values to the audio-video computing memory board card, the inter-board connection unit, and the audio-video codec module, respectively.
3. The reusable audio-video electronic device as recited in claim 2, wherein the network transmission unit comprises an ethernet transmission circuit and/or a serial-to-parallel converter Serdes transmission circuit.
4. The reusable audio-video electronic device as recited in claim 3, wherein the audio-video codec module comprises an ethernet transceiver chip, an Rg45 port of the ethernet transceiver chip is in butt joint with one end of the ethernet transmission circuit, and the other end of the ethernet transmission circuit is in butt joint with an Rg45 port of the audio-video computing memory board card; and the serial network port of the Ethernet transceiver chip is in butt joint with one end of the Serdes transmission circuit, and the other end of the Serdes transmission circuit is in butt joint with the Serdes port of the audio/video computing storage board card.
5. The reusable audio-video electronic device as recited in claim 2, wherein the audio-video codec module is electrically connected to an HDMI interface of the audio-video codec module, for converting video images processed and generated by the audio-video codec module into corresponding HDMI video signals.
6. The reusable audio-video electronic device as recited in claim 5, wherein the audio-video codec module further comprises a video conversion chip and a VGA interface, the HDMI interface is electrically connected to a data input port of the video conversion chip, a video transmission port of the video conversion chip is electrically connected to the VGA interface, at least one of the VGA interface and the HDMI interface is electrically connected to the audio-video transmission unit, and the video conversion chip is configured to convert an HDMI video signal output by the audio-video codec module along the HDMI interface into a VGA signal.
7. The reusable audio-video electronic device as recited in claim 1, wherein the audio-video codec module further comprises a microcontroller and a memory, wherein,
the micro controller is used for decoding a first video code stream and a locally stored second video code stream transmitted by the remote server, synthesizing a video image obtained by decoding and the first video image into a video picture, transmitting the video picture to the audio/video computing and storing board card through the audio/video transmission unit, and transcoding a received H.264/H.265 image;
the memory is at least used for locally storing the second video code stream and/or caching the received H.264/H.265 images.
8. The reusable audio-video electronic device as recited in any one of claims 1 to 7, wherein the audio-video computing memory card comprises a standard 6U VPX architecture audio-video computing card.
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| CN202321433786.7U CN220173319U (en) | 2023-06-06 | 2023-06-06 | Reusable audio-video electronic device |
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| CN202321433786.7U CN220173319U (en) | 2023-06-06 | 2023-06-06 | Reusable audio-video electronic device |
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