CN111447377A - Multimedia signal conversion device - Google Patents
Multimedia signal conversion device Download PDFInfo
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- CN111447377A CN111447377A CN202010278397.6A CN202010278397A CN111447377A CN 111447377 A CN111447377 A CN 111447377A CN 202010278397 A CN202010278397 A CN 202010278397A CN 111447377 A CN111447377 A CN 111447377A
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- signal conversion
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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
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- 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
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- 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
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- 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 a multimedia signal conversion device consisting of an input port, a power supply module, a signal processing circuit and a plurality of output ports, wherein the output ports provide power supplies for display equipment which is respectively connected with the output ports, simultaneously receiving upper point feedback signals and EDID signals fed back by the display equipment, feeding the signals back to the terminal equipment through the signal processing circuit and the input port, sending audio and video signals to the signal processing circuit by the terminal equipment according to the sequence of the received EDID signals, communicating, decoding and processing TMDS signals by the signal processing circuit, and then sending the audio and video signals to the corresponding display equipment to realize synchronous display of the plurality of display equipment, meanwhile, the DP1.4 interface is adopted, so that the DP1.1 signal, the DP1.2 signal and the DP1.4 signal can be compatible, and the compatibility and high-definition requirements of the conversion device are improved.
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 science and technology, various electronic products such as notebook computers, liquid crystal televisions, plasma televisions and the like are more and more popular, and when the electronic devices are used, the electronic devices are generally required to be compact so as to meet more functional requirements. The DP interface, i.e. high definition multimedia interface, is a digital video/audio interface technology, can transmit audio and video signals simultaneously, and is widely applied to various application scenarios requiring simultaneous transmission of audio and video signals. However, the functions of the existing DP1.1 interface and DP1.2 interface are limited in the early development and design process, and all functional signals cannot be led out one by one, which is difficult to meet the transmission requirement of high-definition multimedia signals, and thus the resolution requirement during multi-screen display cannot be met.
Disclosure of Invention
The invention aims to provide a multimedia signal conversion device, and aims to solve the problems that the functions of the existing DP1.1 interface and 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 apparatus, including an input port, a power module, a signal processing circuit, and a plurality of output ports;
the input port and the 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 output ports;
the input port is used for connecting terminal equipment;
the output ports are used for being respectively connected 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 equipment through the plurality of output ports and feeding the power-on feedback signals and the EDID signals back to the terminal equipment so that the terminal equipment sequentially outputs audio and video signals to the input port according to the feedback sequence of the EDID signals, and is also used for performing signal processing on the audio and video signals sequentially output by the terminal equipment and then outputting the audio and video signals to the corresponding output port and the display equipment according to the sequential 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 of model VMM 5330.
In one embodiment, the multimedia signal conversion device further comprises an F L ASH interface for externally connecting an F L ASH memory, and the F L ASH interface is electrically connected with the signal processing circuit.
In one embodiment, the multimedia signal conversion device further comprises a memory, and the memory is electrically connected with the signal processing circuit.
In one embodiment, the memory includes RAM memory and ROM memory.
In one embodiment, the multimedia signal conversion apparatus further comprises a debugging interface electrically connected to the signal processing circuit;
and the debugging interface is used for connecting external debugging equipment to debug the signal processing circuit.
In one embodiment, the multimedia signal conversion apparatus further includes a reset circuit for resetting the power module, and the reset circuit is electrically connected to the power module.
The input port, the power module, the signal processing circuit and the plurality of output ports form a multimedia signal conversion device, the output ports provide power supply for the display equipment which is respectively connected, meanwhile, upper point feedback signals and EDID signals fed back by the display equipment are received and fed back to the 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, the signal processing circuit carries out communication, decoding and TMDS signal processing on the audio and video signals received in sequence and then sends the audio and video signals to the corresponding display equipment so as to realize synchronous display of a plurality of display equipment and improve the integral resolution, meanwhile, the DP1.4 interface is adopted to be compatible with DP1.1 signals, DP1.2 signals and DP1.4 signals, so that the compatibility of the conversion device can be improved, and the transmission requirement of high-definition multimedia signals can be met.
Drawings
Fig. 1 is a schematic diagram of a first structure of a multimedia signal conversion apparatus according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a second structure of a multimedia signal conversion apparatus according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a multimedia signal conversion apparatus 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 embodiments of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present 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 merely illustrative of the invention and are not intended to limit the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
A first aspect of an embodiment of the present invention provides a multimedia signal conversion apparatus 100.
As shown in fig. 1, fig. 1 is a block diagram of an embodiment of a multimedia signal conversion apparatus according to the present invention, and fig. 2 is a structural diagram of an embodiment of a multimedia signal conversion apparatus according to the present invention, wherein the multimedia signal conversion apparatus 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 electrically connected with the signal processing circuit 30, and the power module 20 is respectively electrically connected with the input port 10, the signal processing circuit 30 and the plurality of output ports;
an input port 10 for connecting a terminal device 200;
the output ports are used for respectively connecting 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 signals and the EDID signals output by the display device through the plurality of output ports and feed back the power-on feedback signals and the EDID signals to the terminal device 200, so that the terminal device 200 sequentially outputs the audio/video signals to the input port 10 according to the feedback sequence of the EDID signals, and further configured to output the audio/video signals sequentially output by the terminal device 200 to the corresponding output ports and the display device according to the sequence after performing signal processing on the audio/video signals;
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 8K resolution (7680x 4320) HDR video at 60Hz and 4K HDR video at 120Hz, and are compatible with USB Type-C interfaces, so that a user on a mobile device can enjoy signal images at 7680x 4320 resolution, thereby improving image quality of the mobile device, and meanwhile, the DP1.4 interface is also compatible with the DP1.1 interface and the DP1.2 interface, and can convert DP1.1 data signal speed of 10Gbps or DP1.2 data signal speed of 21.6Gbps into a data signal at 32Gbps, thereby satisfying the current high definition display requirement.
When the multimedia signal conversion device 100 works, the input port 10 is connected to the terminal device 200, the output ports are respectively connected to a Display device, the terminal device 200 may be a desktop computer, a notebook computer, a palm computer, or the like, the Display device may be a Display screen, a television, or the like, the power module 20 is powered on and provides power for each module, the Display device is started when receiving the power through the output interface and feeds back a power-on feedback signal and an EDID (Extended Display identification data) signal, the EDID signal includes various information of the currently connected Display device, including supplier information, a maximum image size, a color setting, a manufacturer presetting, a limit of a frequency range, and a character string of a Display name and a serial number, the signal conversion circuit sends the power-on feedback signal and the EDID signal to the terminal device 200, and establishes a communication connection between the terminal device 200 and the Display device, meanwhile, the terminal device 200 preferentially processes the received EDID signals according to the sequence thereof, and sends the information communicated between the two ends to the corresponding resolution and audio/video signal processing circuit 30 according to the specification requirement of the display device to decode the audio/video signal output by the terminal device 200, perform TDMS signal processing, and output the decoded audio/video signal to the display device.
In one embodiment, the number of the output ports is three, and three display devices can be simultaneously connected to realize three-screen display, as shown in fig. 1, the first output port 41 is connected to the first display device 310, the second output port 42 is connected to the second display device 320, the third output port 43 is connected to the third display device 330, and the maximum resolution of three-screen simultaneous display can reach 4K, 60 HZ.
The signal processing circuit 30 may include one controller to complete signal communication, signal decoding, TDMS signal processing, etc., or include a plurality of controllers, each of which completes a corresponding signal processing function, and the specific setting is designed according to the requirement, which is not specifically required herein. In one embodiment, the Signal Processing circuit 30 includes a controller, which may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. The general 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, the MCU includes four signal processing portions, i.e., U1A, U1B, U1C, and U1D, and a power pin portion (not shown), the U1A is responsible for establishing connection communication with the input port 10, the U1B is responsible for establishing connection communication with the first output port, the U1C is responsible for establishing connection communication with the second output port, the U1D is responsible for establishing connection communication with the third output port, and meanwhile, the signal processing portions are connected to each other to achieve 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 an 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 respectively, the first DC/DC converter 21 and the second DC/DC converter 22 are further electrically connected to the input port 10, the signal processing circuit 30 and the plurality of output ports respectively, wherein a type of the MCU may be selected according to a requirement, and in an embodiment, the type of the MCU is a VMM 5330.
As shown in fig. 3, 4 and 5, the first DC/DC converter 21 and the second DC/DC converter 22 are respectively connected to a 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 performs power conversion on an input DC power, where the power interface J1 may be a USB interface or other power interface J1, the power interface J1 is connected to the DC power and converts the first power supply VDD1 via the first DC/DC converter 21, and converts the second power supply VDD2 via the second DC/DC converter 22.
As shown in fig. 3, in an embodiment, the multimedia signal conversion apparatus 100 further includes an F L ASH interface 50 for externally connecting the F L ASH memory 60, the F L ASH interface 50 is electrically connected to the signal processing circuit 30 through an SPI signal line, and the multimedia signal conversion apparatus 100 can perform MCU expansion and signal storage through an externally connected F L ASH flash memory.
In one embodiment, the multimedia signal conversion apparatus 100 further includes a storage 60, the storage 60 is electrically connected to the signal processing circuit 30, and the storage 60 may be an internal storage unit of the multimedia signal conversion apparatus 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 can perform expansion of the inside of the apparatus and storage of corresponding information through the RAM memory 60 and the ROM memory 60.
Referring to fig. 3, in an embodiment, the multimedia signal conversion apparatus 100 further includes a debugging interface 70, the debugging interface 70 is electrically connected to the signal processing circuit 30 through an I2S signal line, and the debugging interface 70 is used for connecting an external debugging device to debug the signal processing circuit 30.
Referring to fig. 3, in an embodiment, the multimedia signal conversion apparatus 100 further includes a reset circuit 80 for resetting the power module 20, 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 power supply output is abnormal.
In the embodiment of the present 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 apparatus 100, the output ports provide power supplies to the display devices connected to the output ports, simultaneously receive the upper point feedback signal and the EDID signal fed back by the display devices, and feed back to the terminal device 200 through the signal processing circuit 30 and the input port 10, the terminal device 200 sends the audio/video signal to the signal processing circuit 30 according to the received sequence of the EDID signal, and the signal processing circuit 30 sends the audio/video signal received in sequence to the corresponding display device after performing communication, decoding and TMDS signal processing, so as to realize synchronous display of the plurality of display devices and improve the resolution, and meanwhile, the DP1.4 interface is adopted, so that the apparatus can be compatible with the DP1.1 signal, the DP1.2 signal and the DP1.4 signal, and improve the compatibility and the high.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A 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 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 output ports;
the input port is used for connecting terminal equipment;
the output ports are used for being respectively connected 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 equipment through the plurality of output ports and feeding the power-on feedback signals and the EDID signals back to the terminal equipment so that the terminal equipment sequentially outputs audio and video signals to the input port according to the feedback sequence of the EDID signals, and is also used for performing signal processing on the audio and video signals sequentially output by the terminal equipment and then outputting the audio and video signals to the corresponding output port and the display equipment according to the sequential 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 the output ports is three.
3. The multimedia signal conversion apparatus 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 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.
4. The multimedia signal conversion device of claim 1, wherein the signal processing circuit comprises an MCU.
5. The multimedia signal conversion device of claim 4, wherein said MCU is of model number VMM 5330.
6. The multimedia signal conversion device as claimed in claim 1, further comprising an F L ASH interface for externally connecting an F L ASH memory, wherein the F L ASH interface is electrically connected to the signal processing circuit.
7. The multimedia signal conversion device as claimed in 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 as claimed in claim 1, further comprising a debug interface electrically connected to the signal processing circuit;
and the debugging interface is used for connecting external debugging equipment to debug the signal processing circuit.
10. The multimedia signal conversion device as claimed in claim 1, further comprising a reset circuit for resetting the power module, wherein the reset circuit is electrically connected to the power module.
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| Application Number | Priority Date | Filing Date | Title |
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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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN108848333A (en) * | 2018-08-01 | 2018-11-20 | 深圳市广和通无线股份有限公司 | signal conversion module and mobile terminal |
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