CN111447377B - Multimedia signal conversion device - Google Patents
Multimedia signal conversion device Download PDFInfo
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- CN111447377B CN111447377B CN202010278397.6A CN202010278397A CN111447377B CN 111447377 B CN111447377 B CN 111447377B CN 202010278397 A CN202010278397 A CN 202010278397A CN 111447377 B CN111447377 B CN 111447377B
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 42
- 238000012545 processing Methods 0.000 claims abstract description 55
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- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
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- 238000012938 design process Methods 0.000 description 2
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- 230000002093 peripheral effect Effects 0.000 description 2
- 102100036285 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Human genes 0.000 description 1
- 101000875403 Homo sapiens 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Proteins 0.000 description 1
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- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The invention is suitable for the technical field of multimedia, in particular to a multimedia signal conversion device, which comprises an input port, a power supply module, a signal processing circuit and a plurality of output ports, wherein the output ports provide power supply for display equipment connected respectively, simultaneously receive upper point feedback signals and EDID signals fed back by the display equipment, feed back the upper point feedback signals and the EDID signals to terminal equipment through the signal processing circuit and the input port, the terminal equipment sends audio and video signals to the signal processing circuit according to the sequence of the received EDID signals, and the signal processing circuit communicates, decodes and processes the received audio and video signals and sends the processed audio and video signals to corresponding display equipment so as to realize synchronous display of the display equipment.
Description
Technical Field
The invention belongs to the technical field of multimedia, and particularly relates to a multimedia signal conversion device.
Background
With the continuous development of technology, various electronic products such as notebook computers, liquid crystal televisions, plasma televisions and the like are becoming more popular, and when the electronic devices are used, the electronic devices are usually required to be tightly combined to meet more functional requirements. The DP interface, namely a high definition multimedia interface, is a digital video/audio interface technology, can simultaneously transmit audio and video signals, and is widely applied to various application scenes in which the audio and video signals need to be simultaneously transmitted. However, the functions of the existing DP1.1 interface and DP1.2 interface are limited in the early development and design process, so that all the functional signals cannot be led out one by one, and the transmission requirement of high-definition multimedia signals is difficult to meet, so that the resolution requirement during multi-screen display cannot be met.
Disclosure of Invention
The invention aims to provide a multimedia signal conversion device, which aims to solve the problems that the functions of the prior DP1.1 interface and the prior DP1.2 interface are limited in the early development and design process, all functional signals cannot be led out one by one, the transmission requirement of high-definition multimedia signals is difficult to meet, and the resolution requirement during multi-screen display cannot be met.
A first aspect of an embodiment of the present invention provides a multimedia signal conversion device, including an input port, a power module, a signal processing circuit, and a plurality of output ports;
the input port and the plurality of output ports are respectively and electrically connected with the signal processing circuit, and the power supply module is respectively and electrically connected with the input port, the signal processing circuit and the plurality of output ports;
The input port is used for connecting terminal equipment;
The output ports are used for respectively connecting with a display device and outputting a power supply to the display device;
The signal processing circuit is used for receiving the power-on feedback signals and the EDID signals output by the display device through the plurality of output ports and feeding the power-on feedback signals and the EDID signals back to the terminal device, so that the terminal device sequentially outputs audio and video signals to the input port according to the feedback sequence of the EDID signals, and is also used for processing the audio and video signals sequentially output by the terminal device and then outputting the processed audio and video signals to the corresponding output port and the display device according to the sequence;
The input port and the output port are both DP1.4 interfaces.
In one embodiment, the number of output ports is three.
In one embodiment, the power module includes a power interface, a first DC/DC converter and a second DC/DC converter, the power interface is electrically connected to the first DC/DC converter and the second DC/DC converter, respectively, and the first DC/DC converter and the second DC/DC converter are further electrically connected to the input port, the signal processing circuit and the plurality of output ports, respectively.
In one embodiment, the signal processing circuit comprises an MCU.
In one embodiment, the MCU is model number VMM5330.
In one embodiment, the multimedia signal conversion device further includes a FLASH interface for externally connecting a FLASH memory, and the FLASH interface is electrically connected with the signal processing circuit.
In one embodiment, the multimedia signal conversion device further includes a memory, and the memory is electrically connected to the signal processing circuit.
In one embodiment, the memory includes RAM memory and ROM memory.
In one embodiment, the multimedia signal conversion device further comprises a debug interface, and the debug interface is electrically connected with the signal processing circuit;
the debugging interface is used for connecting external debugging equipment to debug the signal processing circuit.
In one embodiment, the multimedia signal conversion device further comprises a reset circuit for resetting the power module, and the reset circuit is electrically connected with the power module.
The input port, the power module, the signal processing circuit and the plurality of output ports form the multimedia signal conversion device, the output ports provide power supply for the display devices connected respectively, meanwhile, the upper point feedback signals and the EDID signals fed back by the display devices are received, the signals are fed back to the terminal device through the signal processing circuit and the input ports, the terminal device sends the audio and video signals to the signal processing circuit according to the sequence of the received EDID signals, the signal processing circuit carries out communication, decoding and TMDS signal processing on the audio and video signals received successively and then sends the audio and video signals to the corresponding display devices, so that synchronous display of the plurality of display devices is realized, the overall resolution is improved, meanwhile, the DP1.4 interface is compatible with the DP1.1 signals, the DP1.2 signals and the DP1.4 signals, the compatibility of the conversion device can be improved, and the transmission requirement of high-definition multimedia signals is met.
Drawings
Fig. 1 is a schematic diagram of a first structure of a multimedia signal conversion device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a second structure of a multimedia signal conversion device according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a multimedia signal conversion device according to an embodiment of the present invention;
Fig. 4 is a schematic circuit diagram of a first DC/DC converter according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a second DC/DC converter according to an embodiment of the present invention;
fig. 6 to 9 are schematic diagrams of various pins of the MCU according to the embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
A first aspect of an embodiment of the present invention provides a multimedia signal conversion apparatus 100.
Fig. 1 is a schematic block diagram of an embodiment of a multimedia signal conversion device according to the present invention, and fig. 2 is a schematic block diagram of an embodiment of a multimedia signal conversion device according to the present invention, wherein a multimedia signal conversion device 100 includes an input port 10, a power module 20, a signal processing circuit 30, and a plurality of output ports;
The input port 10 and the plurality of output ports are respectively and electrically connected with the signal processing circuit 30, and the power module 20 is respectively and electrically connected with the input port 10, the signal processing circuit 30 and the plurality of output ports;
an input port 10 for connecting to the terminal device 200;
The display device comprises a plurality of output ports, a plurality of control units and a control unit, wherein the output ports are used for respectively connecting with a display device and outputting a power supply to the display device;
The signal processing circuit 30 is configured to receive the power-on feedback signal and the EDID signal output by the display device through the multiple output ports and feed back the power-on feedback signal and the EDID signal to the terminal device 200, so that the terminal device 200 sequentially outputs the audio and video signals to the input port 10 according to the feedback sequence of the EDID signal, and is further configured to process the audio and video signals sequentially output by the terminal device 200 and then output the processed audio and video signals to the corresponding output port and display device according to the sequence;
the input port 10 and the output port are both DP1.4 interfaces.
In this embodiment, the input port 10 and the output port are both DP1.4 interfaces, which support an 8K resolution (7680 x 4320) HDR video of 60Hz and a 4K HDR video of 120Hz, and are compatible with a USB Type-C interface, so that a user can enjoy a signal image of 7680x 4320 resolution on a mobile device, thereby improving the image quality of the mobile device, and simultaneously, the DP1.4 interfaces are compatible with a DP1.1 interface and a DP1.2 interface, so that a DP1.1 data signal speed of 10Gbps or a DP1.2 data signal speed of 21.6Gbps can be converted into a speed 32Gbps data signal, thereby meeting the current display high-definition requirement.
When the multimedia signal conversion apparatus 100 works, the input port 10 is connected to the terminal device 200, the output port is respectively connected to a display device, the terminal device 200 can be a desktop computer, a notebook computer, a palm computer, or other devices, the display device can be a display screen or a television, the power module 20 is powered on and provides power supply for each module, the display device is started when receiving the power supply through the output interface, and feeds back a power-on feedback signal and an EDID (Extended Display Identification Data, expanding display identification data) signal, the EDID signal contains various information of the currently connected display device, including vendor information, maximum image size, color setting, manufacturer preset limit, frequency range limit, character strings of display names and serial numbers, the signal conversion circuit sends the power-on feedback signal and the EDID signal to the terminal device 200, establishes communication connection between the terminal device 200 and the display device, and simultaneously, the terminal device 200 processes the information communicated with each other at both ends in priority according to the sequence of the received EDID signal, and sends corresponding resolution and audio/video signal processing circuit 30 to decode the audio/video signal output from the terminal device 200, process the audio/video signal processing circuit to the display device, and the like.
The output ports include at least two and transmit audio and video signals to the display device to realize multi-screen synchronous display, in one embodiment, the number of the output ports is three, and three display devices can be connected simultaneously to realize three-screen display, as shown in fig. 1, the first output port 41 is connected with the first display device 310, the second output port 42 is connected with the second display device 320, the third output port 43 is connected with the third display device 330, and the highest resolution of three-screen simultaneous display can reach 4k and 60hz.
The signal processing circuit 30 may include a controller for performing signal communication, signal decoding, TDMS signal processing, etc., or include a plurality of controllers, each of which performs a corresponding signal processing function, and is specifically configured according to the requirements, and is not specifically required herein. In one embodiment, the signal processing Circuit 30 includes a controller, which may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (DIGITAL SIGNAL processors, DSPs), application Specific Integrated Circuits (ASICs), off-the-shelf Programmable gate arrays (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, and in an embodiment, the controller is an MCU, as shown in fig. 6 to 9, where the MCU includes four signal processing parts U1A, U1B, U C and U1D, and a power pin part (not shown), where U1A is responsible for establishing connection communication with the input port 10, U1B is responsible for establishing connection communication with the first output port, U1C is responsible for establishing connection communication with the second output port, and U1D is responsible for establishing connection communication with the third output port, and each signal processing part is correspondingly connected to each other for realizing communication connection and signal transmission between the terminal device 200 and a corresponding number of display devices.
The power module 20 may be a battery, a power adapter or other power structures, the power module 20 provides a power supply with a corresponding size according to each functional module, in one embodiment, the power module 20 includes a power interface J1, a first DC/DC converter 21 and a second DC/DC converter 22, the power interface J1 is electrically connected to the first DC/DC converter 21 and the second DC/DC converter 22, the first DC/DC converter 21 and the second DC/DC converter 22 are also electrically connected to the input port 10, the signal processing circuit 30 and a plurality of output ports, respectively, wherein the MCU model may be selected according to the requirements, and in one embodiment, the MCU model is VMM5330.
As shown in fig. 3,4 and 5, the first DC/DC converter 21 and the second DC/DC converter 22 are respectively connected with the power interface J1, the first DC/DC converter 21 includes a switch chip U2 and a peripheral switch circuit, the second DC/DC converter 22 includes a switch chip U3 and a peripheral switch circuit, and power conversion is implemented on the input DC power, where the power interface J1 may be a USB interface or other power interfaces J1, the power interface J1 is connected to the DC power, and the first power supply VDD1 is converted by the first DC/DC converter 21 and the second power supply VDD2 is converted by the second DC/DC converter 22.
As shown in fig. 3, in one embodiment, the multimedia signal conversion device 100 further includes a FLASH interface 50 for the external FLASH memory 60, where the FLASH interface 50 is electrically connected to the signal processing circuit 30 through an SPI signal line, and the multimedia signal conversion device 100 can perform MCU expansion and signal storage through the external FLASH memory.
In one embodiment, the multimedia signal conversion device 100 further includes a memory 60, where the memory 60 is electrically connected to the signal processing circuit 30, and the memory 60 may be an internal storage unit of the multimedia signal conversion device 100, such as a hard disk or a memory. The memory 60 may also be an external storage device of the multimedia signal conversion apparatus 100, for example, a plug-in hard disk provided on the multimedia signal conversion apparatus 100, and in one embodiment, as shown in fig. 2, the memory 60 includes a RAM memory 60 and a ROM memory 60, and the mcu may perform expansion of the inside of the apparatus and storage of corresponding information through the RAM memory 60 and the ROM memory 60.
With continued reference to fig. 3, in one embodiment, the multimedia signal conversion apparatus 100 further includes a debug interface 70, where the debug interface 70 is electrically connected to the signal processing circuit 30 through an I2S signal line, and the debug interface 70 is used for connecting an external debug device to debug the signal processing circuit 30.
With continued reference to fig. 3, in one embodiment, the multimedia signal conversion apparatus 100 further includes a reset circuit 80 for resetting the power module 20, where the reset circuit 80 is electrically connected to the first DC/DC converter 21 and/or the second DC/DC converter 22, and the first DC/DC converter 21 and/or the second DC/DC converter 22 can be controlled by controlling the reset circuit 80 to reset and restart the power module 20 when the output of the power supply is abnormal.
According to the embodiment of the invention, the input port 10, the power module 20, the signal processing circuit 30 and the plurality of output ports form the multimedia signal conversion device 100, the output ports provide power supply for the display devices connected respectively, meanwhile, the upper point feedback signals and the EDID signals fed back by the display devices are received, the signals are fed back to the terminal device 200 through the signal processing circuit 30 and the input port 10, the terminal device 200 sends the audio and video signals to the signal processing circuit 30 according to the sequence of the received EDID signals, the signal processing circuit 30 carries out communication, decoding and TMDS signal processing on the received audio and video signals and then sends the audio and video signals to the corresponding display devices, so that synchronous display of the plurality of display devices is realized, the resolution is improved, meanwhile, the DP1.4 interface is adopted, and the compatibility and the high-definition requirements of the conversion device are improved.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. The multimedia signal conversion device is characterized by comprising an input port, a power supply module, a signal processing circuit and a plurality of output ports;
the input port and the plurality of output ports are respectively and electrically connected with the signal processing circuit, and the power supply module is respectively and electrically connected with the input port, the signal processing circuit and the plurality of output ports;
The input port is used for connecting terminal equipment;
The output ports are used for respectively connecting with a display device and outputting a power supply to the display device;
The signal processing circuit is used for receiving the power-on feedback signals and the EDID signals output by the display device through the plurality of output ports and feeding the power-on feedback signals and the EDID signals back to the terminal device, so that the terminal device sequentially outputs audio and video signals to the input port according to the feedback sequence of the EDID signals, and is also used for processing the audio and video signals sequentially output by the terminal device and then outputting the processed audio and video signals to the corresponding output port and the display device according to the sequence;
The input port and the output port are both DP1.4 interfaces.
2. The multimedia signal conversion apparatus of claim 1, wherein the number of output ports is three.
3. The multimedia signal conversion device of claim 1, wherein the power module comprises a power interface, a first DC/DC converter and a second DC/DC converter, the power interface being electrically connected to the first DC/DC converter and the second DC/DC converter, respectively, the first DC/DC converter and the second DC/DC converter being further electrically connected to the input port, the signal processing circuit and the plurality of output ports, respectively.
4. The multimedia signal conversion apparatus of claim 1, wherein the signal processing circuit comprises an MCU.
5. The multimedia signal conversion apparatus of claim 4, wherein the MCU is model number VMM5330.
6. The multimedia signal conversion device of claim 1, further comprising a FLASH interface for external FLASH memory, the FLASH interface being electrically connected to the signal processing circuit.
7. The multimedia signal conversion device of claim 1, further comprising a memory electrically connected to the signal processing circuit.
8. The multimedia signal conversion apparatus of claim 7, wherein the memory comprises a RAM memory and a ROM memory.
9. The multimedia signal conversion device of claim 1, further comprising a debug interface electrically connected to the signal processing circuit;
the debugging interface is used for connecting external debugging equipment to debug the signal processing circuit.
10. The multimedia signal conversion device of claim 1, further comprising a reset circuit for resetting the power module, the reset circuit being electrically connected to the power module.
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| CN202010278397.6A CN111447377B (en) | 2020-04-10 | 2020-04-10 | Multimedia signal conversion device |
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| CN202010278397.6A CN111447377B (en) | 2020-04-10 | 2020-04-10 | Multimedia signal conversion device |
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| CN111447377B true CN111447377B (en) | 2024-06-21 |
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| CN112040183A (en) * | 2020-08-21 | 2020-12-04 | 中航华东光电（上海）有限公司 | Remote nondestructive transmission display and control system |
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| CN211880499U (en) * | 2020-04-10 | 2020-11-06 | 深圳市显盈科技股份有限公司 | Multimedia signal conversion device |
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| CN205510235U (en) * | 2016-02-19 | 2016-08-24 | 深圳市博胜电子技术有限公司 | High definition HDMI sound video switch |
| CN108848333B (en) * | 2018-08-01 | 2021-07-06 | 深圳市广和通无线股份有限公司 | Signal conversion module and mobile terminal |
| CN109618157A (en) * | 2018-12-29 | 2019-04-12 | 东南大学 | A kind of system for implementing hardware and method of video display stream compressed encoding |
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