CN110798644A - Wireless screen-casting conference system based on HDMI signal conversion - Google Patents
Wireless screen-casting conference system based on HDMI signal conversion Download PDFInfo
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- CN110798644A CN110798644A CN201911042843.7A CN201911042843A CN110798644A CN 110798644 A CN110798644 A CN 110798644A CN 201911042843 A CN201911042843 A CN 201911042843A CN 110798644 A CN110798644 A CN 110798644A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 44
- 238000005266 casting Methods 0.000 title claims description 13
- 238000004891 communication Methods 0.000 claims abstract description 11
- 230000005236 sound signal Effects 0.000 claims description 11
- 230000006855 networking Effects 0.000 claims description 3
- 238000013500 data storage Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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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
- H04N21/43635—HDMI
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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
- H04N21/43637—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
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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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
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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)
Abstract
The invention provides a wireless screen-projecting conference system based on HDMI signal conversion, which comprises a computer terminal for outputting HDMI signals, an HDMI signal processing system for receiving the HDMI signals and processing the signals, an NVR client for receiving data information processed by the HDMI signal processing system, a plurality of display screens for video playing and speakers for audio information playing, wherein the display screens are connected with the NVR client; the HDMI signal processing system comprises an HDMI signal conversion chip, a main control chip for receiving data information from the HDMI signal conversion chip and an Onvif protocol output port for being in communication connection with an NVR client, and the HDMI signal conversion, audio and video coding, Onvif, data storage and the like are combined, so that real-time audio and video picture sharing of a computer is realized, the computer can be easily switched to computers of different participants, information exchange and communication of the participants in the large-scale conference process are facilitated, and conference recording is also facilitated.
Description
[ technical field ]
The invention relates to the technical field of HDMI digital audio and video signal processing and transmission, in particular to a wireless screen-casting conference system based on HDMI signal conversion, which is convenient to use and outstanding in application effect.
[ background art ]
An HDMI digital audio/video signal is a digital audio/video technology capable of synchronously transmitting audio and video, and is widely used in the field of consumer electronics, such as high definition set top boxes, high definition cameras, televisions, notebook computers and other products, and is also an interface capable of supporting high definition and ultra high definition video transmission.
At present, economy develops rapidly, information, science and technology and day are new, people often need to participate in meetings to share information and discuss problems in work, and make important decisions, the important of network video meetings or ordinary company meetings also usually needs meeting recorders to record in a text mode, but the text record is inevitable to be omitted, so if conditional, the whole meeting scene can be directly recorded, then the arrangement is carried out, and the situation is easier relatively, and the omission is avoided.
In a large conference, each participant often needs to make positive statement and speak to introduce related data and information, and in order to enable the participants to clearly know the information, the information is often sent to a real-time picture of a notebook computer of a speaker through a large screen, so that the HDMI ports may need to be continuously switched, and the HDMI ports are required to be plugged into other computers every time the participants need to speak, which brings great inconvenience and easily affects the overall rhythm of the conference.
[ summary of the invention ]
In order to solve the problems in the prior art, the invention provides the wireless screen-casting conference system based on the HDMI signal conversion, which is convenient to use and has a remarkable application effect.
The scheme for solving the technical problem is to provide a wireless screen-casting conference system based on HDMI signal conversion, which comprises a computer terminal for outputting HDMI signals, an HDMI signal processing system for receiving the HDMI signals and processing the signals, an NVR client for receiving data information processed by the HDMI signal processing system, a plurality of display screens for video playing and speakers for playing audio information, wherein the display screens are connected with the NVR client; the HDMI signal processing system comprises an HDMI signal conversion chip, a main control chip for receiving data information from the HDMI signal conversion chip and an onvif protocol output port for being in communication connection with the NVR client; the system also comprises an SD card unit or a mobile hard disk unit which is respectively connected with the HDMI signal processing system and the NVR client and is used for storing data; the HDMI signal conversion chip converts the HDMI signal into an audio signal and an MIPI video signal; the main control chip receives the audio signal and the MIPI video signal from the HDMI signal conversion chip, then outputs audio data and video data, and finally outputs data through an output port of an onvif protocol.
Preferably, the HDMI signal processing system is further provided with a wireless WiFi module for networking in a local area network and transmitting the audio/video data information encoded by the main control chip to the NVR client.
Preferably, data transmission is performed between the wireless WiFi module and the NVR client through an onvif protocol.
Compared with the prior art, the wireless screen-casting conference system based on HDMI signal conversion simultaneously arranges a computer terminal for outputting HDMI signals, an HDMI signal processing system for receiving the HDMI signals and processing the signals, an NVR client for receiving data information processed by the HDMI signal processing system, a plurality of display screens for video playing and speakers for audio information playing, wherein the display screens are connected with the NVR client, the HDMI signal processing system comprises an HDMI signal conversion chip, a main control chip for receiving the data information from the HDMI signal conversion chip, an onvif protocol output port for communication connection with the NVR client, an SD card unit or a mobile hard disk unit which is respectively connected with the HDMI signal processing system and the NVR client and is used for data storage, the HDMI signal conversion chip converts the HDMI signals into audio signals and MIPI video signals, the method combines HDMI signal conversion, audio and video coding, Onvif, data storage and the like to realize real-time audio and video picture sharing of the computer, can be easily switched to computers of different participants, and is convenient for information exchange and communication of the participants in the large-scale conference process and conference recording.
[ description of the drawings ]
Fig. 1 is a schematic signal processing flow diagram of a wireless screen-casting conference system based on HDMI signal conversion according to the present invention.
Fig. 2 is a schematic view of a wireless screen-projection conference system based on HDMI signal conversion according to the present invention.
[ detailed description of the invention ]
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be 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.
Referring to fig. 1 and fig. 2, a wireless screen-casting conference system 1 based on HDMI signal conversion according to the present invention includes a computer terminal for outputting HDMI signals, an HDMI signal processing system for receiving and processing HDMI signals, an NVR client for receiving data information processed by the HDMI signal processing system, and a plurality of display screens for video playing and speakers for audio information connected to the NVR client; the HDMI signal processing system comprises an HDMI signal conversion chip, a main control chip for receiving data information from the HDMI signal conversion chip and an onvif protocol output port for being in communication connection with the NVR client; the system also comprises an SD card unit or a mobile hard disk unit which is respectively connected with the HDMI signal processing system and the NVR client and is used for storing data; the HDMI signal conversion chip converts the HDMI signal into an audio signal and an MIPI video signal; the main control chip receives the audio signal and the MIPI video signal from the HDMI signal conversion chip, then outputs audio data and video data, and finally outputs data through an output port of an onvif protocol.
This application is through setting up the computer terminal who is used for exporting the HDMI signal simultaneously, receive the HDMI signal processing system that the signal was handled, be used for receiving by the NVR client of HDMI signal processing system processing data information after accomplishing and with a plurality of be used for carrying on the display screen of video broadcast and the speaker of broadcast audio information that the NVR client is connected, HDMI signal processing system includes HDMI signal conversion chip, receive the main control chip that comes from HDMI signal conversion chip data information and be used for carrying on the onvif agreement output port of communication connection with the NVR client, still include respectively with HDMI signal processing system and NVR client are connected, are used for carrying on SD card unit or portable hard drive unit of data storage, HDMI signal conversion chip converts the HDMI signal into audio signal and MIPI video signal, combines HDMI signal conversion, audio video coding, audio frequency and video coding, The Onvif, data storage and the like realize the real-time audio and video picture sharing of the computer, and can be easily switched to computers of different participants, thereby facilitating the information exchange and communication of the participants in the large-scale conference process and the conference recording.
Preferably, the HDMI signal processing system is further provided with a wireless WiFi module for networking in a local area network and transmitting the audio/video data information encoded by the main control chip to the NVR client.
Preferably, data transmission is performed between the wireless WiFi module and the NVR client through an onvif protocol.
The system is a wireless screen-projecting conference system based on HDMI signal conversion, is convenient to switch to computer screens of participants who speak and state in a large conference, and is convenient to record information such as the whole conference scene and data provided by each conference participant.
According to the technology, the HDMI signal of the notebook computer is output, the HDMI signal is converted into the MIPI video signal and the audio analog signal by the conversion core product, the MIPI signal is coded into video data by the main control chip, the audio analog signal is coded into audio data, the audio data is transmitted to the NVR client by the onvif protocol, and finally the audio data and the video data are played by the display and the loudspeaker which are connected with the client, so that real-time audio and video picture sharing of the computer is realized, and information exchange and communication of participants in a conference process are facilitated.
Functional overview: the product aims to enable people to communicate and exchange information more conveniently when the people participate in a conference, and based on the HDMI signal conversion function, real-time audio and video data are stored through the data storage function after audio and video signals are coded, and a computer picture is projected to a large screen through the wireless screen projection function to be displayed, and sound is played through a loudspeaker.
HDMI signal conversion function:
the conversion chip converts the HDMI signals into MIPI signals and audio signals, and then the MIPI signals and the audio signals are coded into audio and video data through the main control chip.
Data storage function:
after being coded into audio and video data, the audio and video data can be directly recorded into an SD card or a mobile hard disk connected with the device, and data, explanation manuscripts and the like used by individuals in a conference are recorded. Meanwhile, after the NVR receives the audio and video data, the audio and video data can be stored through the SD card or the mobile hard disk connected with the NVR, and information such as the whole conference scene and shared data provided by each conference participant can be recorded.
The wireless screen projection function:
the WiFi module of the device enters an STA mode to be connected with the WiFi of the router to enable the WiFi of the device and the NVR equipment to be located in the same local area network, after audio and video data are coded, the audio and video data are transmitted to the NVR device through an Onvf protocol in the local area network, after the NVR device receives the audio and video data, the video data are displayed through a large screen connected with the NVR device, sound is played through a loudspeaker connected with the NVR device, and therefore the wireless screen-casting function is achieved
Compared with the prior art, the wireless screen-casting conference system 1 based on HDMI signal conversion simultaneously comprises a computer terminal for outputting HDMI signals, an HDMI signal processing system for receiving the HDMI signals and processing the signals, an NVR client for receiving data information processed by the HDMI signal processing system, a plurality of display screens for video playing and speakers for audio information playing, wherein the display screens are connected with the NVR client, the onvif protocol output ports are connected with the HDMI signal processing system and the NVR client, the SD card unit or the mobile hard disk unit are respectively connected with the HDMI signal processing system and the NVR client and are used for data storage, and the HDMI signal conversion chip converts the HDMI signals into audio signals and MIPI video signals, the method combines HDMI signal conversion, audio and video coding, Onvif, data storage and the like to realize real-time audio and video picture sharing of the computer, can be easily switched to computers of different participants, and is convenient for information exchange and communication of the participants in the large-scale conference process and conference recording.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (3)
1. The utility model provides a wireless screen-casting conference system based on HDMI signal conversion which characterized in that: the system comprises a computer terminal for outputting HDMI signals, an HDMI signal processing system for receiving the HDMI signals and processing the signals, an NVR client for receiving data information processed by the HDMI signal processing system, a plurality of display screens for video playing and speakers for playing audio information, wherein the display screens are connected with the NVR client; the HDMI signal processing system comprises an HDMI signal conversion chip, a main control chip for receiving data information from the HDMI signal conversion chip and an onvif protocol output port for being in communication connection with the NVR client; the system also comprises an SD card unit or a mobile hard disk unit which is respectively connected with the HDMI signal processing system and the NVR client and is used for storing data; the HDMI signal conversion chip converts the HDMI signal into an audio signal and an MIPI video signal; the main control chip receives the audio signal and the MIPI video signal from the HDMI signal conversion chip, then outputs audio data and video data, and finally outputs data through an output port of an onvif protocol.
2. The wireless screen-casting conference system based on HDMI signal conversion as claimed in claim 1, wherein: the HDMI signal processing system is also provided with a wireless WiFi module which is used for networking a local area network and transmitting the audio and video data information coded by the main control chip to the NVR client.
3. The wireless screen-casting conference system based on HDMI signal conversion as claimed in claim 2, wherein: and the wireless WiFi module and the NVR client side transmit data through an onvif protocol.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911042843.7A CN110798644A (en) | 2019-10-30 | 2019-10-30 | Wireless screen-casting conference system based on HDMI signal conversion |
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| CN201911042843.7A CN110798644A (en) | 2019-10-30 | 2019-10-30 | Wireless screen-casting conference system based on HDMI signal conversion |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113079357A (en) * | 2021-04-08 | 2021-07-06 | 天地伟业技术有限公司 | Encoder and system for realizing audio and video interaction |
| CN113473059A (en) * | 2020-05-27 | 2021-10-01 | 海信集团有限公司 | Data processing method, intelligent device and intelligent processing system |
| CN113645498A (en) * | 2021-09-07 | 2021-11-12 | 北京有竹居网络技术有限公司 | Media signal processing equipment |
| WO2022141275A1 (en) * | 2020-12-30 | 2022-07-07 | 广州视源电子科技股份有限公司 | Data transmission method and data transmission system |
| WO2023103671A1 (en) * | 2021-12-08 | 2023-06-15 | 华为技术有限公司 | Conference equipment, data processing method, and conference system |
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