CN110662101A - Network video multi-path display method and device based on UDP - Google Patents
Network video multi-path display method and device based on UDP Download PDFInfo
- Publication number
- CN110662101A CN110662101A CN201810694875.4A CN201810694875A CN110662101A CN 110662101 A CN110662101 A CN 110662101A CN 201810694875 A CN201810694875 A CN 201810694875A CN 110662101 A CN110662101 A CN 110662101A
- Authority
- CN
- China
- Prior art keywords
- video
- address information
- information
- terminal
- terminal video
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
-
- 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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
- H04N21/64322—IP
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a network video multi-path display method and a device based on a UDP protocol, wherein the method comprises the following steps: respectively creating a plurality of video window controls for playing a plurality of videos, and setting a storage device for storing a plurality of preset terminal video equipment address information; receiving video information of a plurality of terminal video devices based on a UDP protocol, and obtaining real source address information of the video information of the plurality of terminal video devices; and respectively playing the video information of the plurality of terminal video devices in the plurality of video window controls according to the result of comparing the address information of the plurality of terminal video devices with the address information of the plurality of real sources. The beneficial effects of the implementation of the invention are as follows: the problem that images of a plurality of terminal video devices are messy when transmitted and displayed to a client through a UDP (user Datagram protocol) protocol is solved, and the effect that different windows respectively display videos and do not interfere with each other is achieved through the combination of the windows and an address binding and callback mechanism.
Description
Technical Field
The invention relates to the technical field of network video communication, in particular to a network video multi-path display method and device based on a UDP protocol.
Background
Most of current network video monitoring comprises client software and terminal video equipment, wherein the terminal video equipment is used for acquiring a shot frame image and then sending the image to a client; the client software primarily receives video images and then displays them. When the number of the terminal video devices is multiple, how to display images acquired by different video devices on the client software needs to be considered. The terminal video equipment is responsible for providing video sources, and the client software is responsible for displaying the video images on a computer screen.
The terminal video device transmits video data to the client software according to the following steps.
Step 1) a client terminal actively initiates a TCP connection request to terminal video equipment;
step 2) after the terminal video equipment receives the request of the client, both sides establish a command control session;
step 3) the client sends a command for requesting video data to the video terminal equipment through the session;
step 4) after receiving the command, the terminal video equipment sends a response to the client on the session; meanwhile, the terminal video equipment transmits video data to a network communication port appointed by the client in a UDP mode;
step 5) after receiving the response, the client closes the session; binding a network communication port in addition, starting UDP session service, and waiting for receiving video data transmitted by the terminal video equipment;
and 6) after receiving the video data through the UDP session, the client decodes the video data and displays the video data on a computer screen.
The above interaction mode has technical obstacles for the client to play multiple videos simultaneously.
The UDP communication mode is non-connection-oriented, that is, the terminal video device may directly and actively send video data to the client without establishing a connection to the client, and the client passively receives the video data at this time. When a client requests videos from a plurality of terminal video devices, all the devices send data acquired by the devices to the same port number of the same client according to the network interaction flow appointed between the client and the devices.
To display these videos, the client typically starts a thread for receiving video data via UDP. All terminal video equipment sends video data to the same port of the client, and for one port, the client can only open one thread to receive the video data.
In the prior art, the commonly seen dynamic video is actually composed of a static picture, namely a frame picture, and the static pictures are sequentially presented on a plane range with fixed positions and sizes at a very fast speed according to the human persistence of vision effect to form the dynamic video. When the terminal video equipment continuously transmits respective video streams to the same client, namely, one frame of picture is transmitted to the client at each time, the client decodes one frame of picture and then displays one frame of picture on a screen, and finally, the client sees the video if receiving, decoding and displaying the sequential pictures in a continuous cycle.
Then, when multiple terminal video devices all send video streams to the same client, the video frame pictures received by the client are of the multiple terminal video devices. For example, referring to fig. 1, fig. 1 is a schematic diagram of a problem of a video surveillance system in the prior art, where a first picture transmitted by a terminal video device a is received by a client, a second picture, which may not be a picture, is received by the client, a first frame transmitted by a terminal video device B is received by the client, and so on. The videos acquired by each terminal video device are in different scenes, and finally, the images of the plurality of terminal video devices are displayed on the same window of the client side in disorder.
In view of the above problems, if the client starts a thread for each terminal device, each thread is only responsible for receiving video data transmitted by one terminal video device, and then decoding and displaying the video data, the final effect is achieved. However, based on a specific two-party network interaction flow, the client can only open one thread. Therefore, how to allow one receiving thread to distribute and display video streams of different devices in respective corresponding video windows is a technical key point.
Disclosure of Invention
The invention aims to provide a network video multi-path display method and device based on a UDP protocol, and solves the problems that in the prior art, images of a plurality of terminal video devices are displayed on the same window of a client side messily, and the client side can only start one thread.
The technical scheme of the invention is realized as follows:
in one aspect, the present invention provides a network video multi-path display method based on a UDP protocol, including:
respectively creating a plurality of video window controls for playing a plurality of videos, and setting a storage device for storing a plurality of preset terminal video device address information, wherein the plurality of terminal video device address information are respectively bound to the plurality of video window controls;
receiving video information of a plurality of terminal video devices based on a UDP protocol, and obtaining real source address information of the video information of the plurality of terminal video devices;
and according to the result of comparing the address information of the plurality of terminal video devices with the address information of the plurality of real sources, respectively playing the video information of the plurality of terminal video devices in the plurality of video window controls.
In the method for displaying multiple network video channels according to the present invention, the receiving video information of a plurality of terminal video devices based on UDP protocol and obtaining the real source address information of the plurality of terminal video devices includes:
receiving video information of a plurality of terminal video devices based on a UDP protocol, wherein the video information of each terminal video device comprises multi-frame sub-video information;
and obtaining the real source address information of the sub-video information of each frame.
In the network video multi-path display method of the present invention, the playing the video information of the plurality of terminal video devices in the plurality of video window controls respectively according to the result of comparing the address information of the plurality of terminal video devices with the address information of the plurality of real sources includes:
comparing a plurality of the terminal video device address information with a plurality of the real source address information, respectively;
establishing a corresponding relation between the address information of the terminal video equipment and the video information with the same real source address information;
and playing the video information in the video window control bound by the corresponding terminal video equipment address information through a callback function of Windows.
In the network video multi-path display method, the storage device is an array.
The network video multi-path display method of the invention also comprises the following steps:
and respectively establishing TCP (Transmission control protocol) connection with the plurality of terminal video equipment through the client.
In another aspect, there is provided a network video multiplex display device based on UDP protocol, in which a plurality of instructions are stored, the instructions being adapted to be loaded and executed by a processor, comprising:
respectively creating a plurality of video window controls for playing a plurality of videos, and setting a storage device for storing a plurality of preset terminal video device address information, wherein the plurality of terminal video device address information are respectively bound to the plurality of video window controls;
receiving video information of a plurality of terminal video devices based on a UDP protocol, and obtaining real source address information of the video information of the plurality of terminal video devices;
and according to the result of comparing the address information of the plurality of terminal video devices with the address information of the plurality of real sources, respectively playing the video information of the plurality of terminal video devices in the plurality of video window controls.
In the network video multi-path display device of the present invention, the receiving video information of a plurality of terminal video devices based on UDP protocol and learning the real source address information of the plurality of terminal video devices includes:
receiving video information of a plurality of terminal video devices based on a UDP protocol, wherein the video information of each terminal video device comprises multi-frame sub-video information;
and obtaining the real source address information of the sub-video information of each frame.
In the network video multi-path display apparatus of the present invention, the playing the video information of the plurality of terminal video devices in the plurality of video window controls respectively according to the result of comparing the address information of the plurality of terminal video devices with the address information of the plurality of real sources includes:
comparing a plurality of the terminal video device address information with a plurality of the real source address information, respectively;
establishing a corresponding relation between the address information of the terminal video equipment and the video information with the same real source address information;
and playing the video information in the video window control bound by the corresponding terminal video equipment address information through a callback function of Windows.
In the network video multi-path display device, the storage device is an array.
The network video multi-path display device of the invention also comprises:
and respectively establishing TCP (Transmission control protocol) connection with the plurality of terminal video equipment through the client.
Therefore, the invention has the advantages of solving the problem that the images of a plurality of terminal video devices are messy when being transmitted and displayed to the client through the UDP protocol, and realizing the effect that different windows respectively display videos and do not interfere with each other through the combination of the windows and the address binding and callback mechanism.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a problem with a prior art video surveillance system;
fig. 2 is a schematic flowchart of a network video multi-channel display method based on the UDP protocol according to an embodiment of the present invention;
fig. 3 is a diagram illustrating a final effect of the UDP-based network video multi-path display method according to an embodiment of the present invention.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the following description is only a specific illustration of the embodiments of the present invention and should not be taken as limiting the scope of the invention.
The abbreviations and terms presented in the present invention are explained as follows:
UPD: a connectionless IP network communication protocol. The source and the terminal do not establish a connection before transferring the data, and when it wants to transfer it simply grabs the data from the application and throws it on the network as soon as possible. The process of data transmission is similar to sending a mail, and a sender only manages to send the mail without knowing whether the other party can receive the mail.
TCP: a connection-oriented IP network communication protocol. Two applications using TCP (typically a client and a server) must establish a TCP connection before exchanging data with each other. This process is similar to making a call, dialing (initiating a connection), waiting for the other party to go off-hook (connection establishment), and then starting a call (transmitting data).
The terminal video equipment: an embedded device is provided for capturing video images and transmitting the video continuously in the form of a data stream over an IP network.
A client: software for viewing video images captured by devices located elsewhere over an IP network for use by software users. The client software is usually run on a PC, and may also be run on a mobile phone or a tablet computer.
Referring to fig. 2, fig. 2 is a schematic flowchart of a network video multi-channel display method based on UDP protocol according to an embodiment of the present invention, where the method is implemented mainly by a computer program, and includes steps S1-S3:
s1, respectively creating a plurality of video window controls for playing a plurality of videos, and setting a storage device for storing a plurality of preset terminal video device address information, wherein the plurality of terminal video device address information are respectively bound to the plurality of video window controls; preferably, referring to fig. 2, the storage device is an array, and the plurality of terminal video devices include device a, device B, and device C … …, which create a plurality of video window controls for playing a plurality of videos; and creating an array for storing the address information of the terminal video equipment, and binding the address information of the equipment with the video window when the user determines which window to play the video of which terminal video equipment.
S2, receiving video information of a plurality of terminal video devices based on a UDP protocol, and obtaining real source address information of the video information of the plurality of terminal video devices; step S2 includes steps S21-S22:
s21, receiving video information of a plurality of terminal video devices based on a UDP protocol, where, referring to fig. 2, the video information of each terminal video device includes multi-frame sub-video information; the problem of video coding and decoding is involved in the transmission of multi-frame sub-video information, the original video frame transmission occupies larger disk space and network bandwidth, the original frame data is organized according to a certain form by using a coding algorithm, and a large amount of space can be saved so as to be convenient for storage and transmission; when the video is played, the video frame is restored to the original frame by using a decoding algorithm and finally displayed.
And S22, acquiring the real source address information of the sub-video information of each frame. That is, in the thread for receiving video data, the terminal video device from which the data received this time comes (i.e. the address information of the terminal video device) can be obtained while receiving the data.
S3, playing the video information of the plurality of terminal video devices in the plurality of video window controls respectively according to the result of comparing the address information of the plurality of terminal video devices with the address information of the plurality of real sources. Step S3 includes steps S31-S33:
and S31, comparing the address information of the terminal video equipment with the real source address information respectively.
S32, establishing a corresponding relation between the video information with the same terminal video equipment address information and the real source address information.
And S33, playing the video information in the video window control bound by the address information of the corresponding terminal video equipment through a callback function of Windows.
Referring to fig. 3, fig. 3 is a diagram illustrating a final effect of the network video multi-path display method based on the UDP protocol according to an embodiment of the present invention. The network video multi-path display method utilizes a windows callback mechanism to continuously send the obtained video data to the corresponding video window for playing in the sub-thread execution body through a callback function. And in the callback function, according to the result of comparing the address information of the equipment to which the obtained video belongs with the address information bound to the video window determined by the current user, the video is streamed and placed in the bound video window.
Preferably, the network video multi-path display method further includes step S4:
and S4, respectively establishing TCP connection with the terminal video equipment through the client. When two parties communicate, connection-oriented IP network communication needs to be established first. Therefore, the final multi-channel display of a plurality of video terminal images on the client software is completed through the combination of the binding of the terminal device information and the client video display window and the callback mechanism.
The invention also provides a network video multi-path display device based on the UDP protocol, wherein a plurality of instructions are stored, and the instructions are suitable for being loaded and executed by a processor, so that the method is realized.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A network video multi-path display method based on UDP protocol is characterized by comprising the following steps:
respectively creating a plurality of video window controls for playing a plurality of videos, and setting a storage device for storing a plurality of preset terminal video device address information, wherein the plurality of terminal video device address information are respectively bound to the plurality of video window controls;
receiving video information of a plurality of terminal video devices based on a UDP protocol, and obtaining real source address information of the video information of the plurality of terminal video devices;
and according to the result of comparing the address information of the plurality of terminal video devices with the address information of the plurality of real sources, respectively playing the video information of the plurality of terminal video devices in the plurality of video window controls.
2. The method for multi-channel video display on network according to claim 1, wherein said receiving video information of a plurality of end video devices based on UDP protocol and learning the real source address information of the plurality of end video devices comprises:
receiving video information of a plurality of terminal video devices based on a UDP protocol, wherein the video information of each terminal video device comprises multi-frame sub-video information;
and obtaining the real source address information of the sub-video information of each frame.
3. The method according to claim 2, wherein said playing video information of a plurality of terminal video devices in a plurality of video window controls respectively according to a result of comparing address information of a plurality of terminal video devices with address information of a plurality of real sources comprises:
comparing a plurality of the terminal video device address information with a plurality of the real source address information, respectively;
establishing a corresponding relation between the address information of the terminal video equipment and the video information with the same real source address information;
and playing the video information in the video window control bound by the corresponding terminal video equipment address information through a callback function of Windows.
4. The method as claimed in claim 1, wherein the storage device is an array.
5. The method for multi-channel display of network video according to claim 1, further comprising:
and respectively establishing TCP (Transmission control protocol) connection with the plurality of terminal video equipment through the client.
6. A network video multiplex display device based on UDP protocol having a plurality of instructions stored therein, said instructions adapted to be loaded and executed by a processor, comprising:
respectively creating a plurality of video window controls for playing a plurality of videos, and setting a storage device for storing a plurality of preset terminal video device address information, wherein the plurality of terminal video device address information are respectively bound to the plurality of video window controls;
receiving video information of a plurality of terminal video devices based on a UDP protocol, and obtaining real source address information of the video information of the plurality of terminal video devices;
and according to the result of comparing the address information of the plurality of terminal video devices with the address information of the plurality of real sources, respectively playing the video information of the plurality of terminal video devices in the plurality of video window controls.
7. The apparatus according to claim 6, wherein said receiving video information of a plurality of terminal video devices based on UDP protocol and learning real source address information of the plurality of terminal video devices comprises:
receiving video information of a plurality of terminal video devices based on a UDP protocol, wherein the video information of each terminal video device comprises multi-frame sub-video information;
and obtaining the real source address information of the sub-video information of each frame.
8. The apparatus according to claim 7, wherein said playing video information of a plurality of terminal video devices in a plurality of video window controls respectively according to the result of comparing the address information of a plurality of terminal video devices with the address information of a plurality of real sources comprises:
comparing a plurality of the terminal video device address information with a plurality of the real source address information, respectively;
establishing a corresponding relation between the address information of the terminal video equipment and the video information with the same real source address information;
and playing the video information in the video window control bound by the corresponding terminal video equipment address information through a callback function of Windows.
9. The network video multiplex display device of claim 6 wherein said storage device is an array.
10. The network video multiplex display device of claim 6 further comprising:
and respectively establishing TCP (Transmission control protocol) connection with the plurality of terminal video equipment through the client.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810694875.4A CN110662101A (en) | 2018-06-29 | 2018-06-29 | Network video multi-path display method and device based on UDP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810694875.4A CN110662101A (en) | 2018-06-29 | 2018-06-29 | Network video multi-path display method and device based on UDP |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110662101A true CN110662101A (en) | 2020-01-07 |
Family
ID=69027529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810694875.4A Pending CN110662101A (en) | 2018-06-29 | 2018-06-29 | Network video multi-path display method and device based on UDP |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110662101A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113727175A (en) * | 2021-08-11 | 2021-11-30 | 西安诺瓦星云科技股份有限公司 | Multi-channel video source playback method and system and display control equipment |
| CN114915807A (en) * | 2022-07-14 | 2022-08-16 | 飞狐信息技术（天津）有限公司 | Information processing method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050162261A1 (en) * | 2004-01-22 | 2005-07-28 | Shih-Hsiung Li | Vehicular monitoring systems with a multi-window display |
| CN105872569A (en) * | 2015-11-27 | 2016-08-17 | 乐视云计算有限公司 | Video playing method and system, and devices |
| CN106028004A (en) * | 2016-07-25 | 2016-10-12 | 厦门视诚科技有限公司 | Multi-signal input and multi-image composition device and method |
| CN106993212A (en) * | 2017-03-20 | 2017-07-28 | 贵阳朗玛信息技术股份有限公司 | The method and device of multi-channel video is played in browser window |
| CN107483882A (en) * | 2017-07-07 | 2017-12-15 | 上海斐讯数据通信技术有限公司 | A kind of windows display system and method |
| EP3691255A1 (en) * | 2017-09-30 | 2020-08-05 | ZTE Corporation | Method for playing multiple videos on mobile terminal, mobile terminal, and readable storage medium |
-
2018
- 2018-06-29 CN CN201810694875.4A patent/CN110662101A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050162261A1 (en) * | 2004-01-22 | 2005-07-28 | Shih-Hsiung Li | Vehicular monitoring systems with a multi-window display |
| CN105872569A (en) * | 2015-11-27 | 2016-08-17 | 乐视云计算有限公司 | Video playing method and system, and devices |
| CN106028004A (en) * | 2016-07-25 | 2016-10-12 | 厦门视诚科技有限公司 | Multi-signal input and multi-image composition device and method |
| CN106993212A (en) * | 2017-03-20 | 2017-07-28 | 贵阳朗玛信息技术股份有限公司 | The method and device of multi-channel video is played in browser window |
| CN107483882A (en) * | 2017-07-07 | 2017-12-15 | 上海斐讯数据通信技术有限公司 | A kind of windows display system and method |
| EP3691255A1 (en) * | 2017-09-30 | 2020-08-05 | ZTE Corporation | Method for playing multiple videos on mobile terminal, mobile terminal, and readable storage medium |
Non-Patent Citations (1)
| Title |
|---|
| 李宗辰: "基于VLC的Android 多路视频监控系统", 《现代电子技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113727175A (en) * | 2021-08-11 | 2021-11-30 | 西安诺瓦星云科技股份有限公司 | Multi-channel video source playback method and system and display control equipment |
| CN114915807A (en) * | 2022-07-14 | 2022-08-16 | 飞狐信息技术（天津）有限公司 | Information processing method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110874959B (en) | Multi-terminal same-screen teaching system and teaching method | |
| TWI630825B (en) | Interactive video conferencing | |
| JP5199400B2 (en) | How to run rich video on mobile devices | |
| US9024995B2 (en) | Video calling using a remote camera device to stream video to a local endpoint host acting as a proxy | |
| US8903916B2 (en) | Method, system, and computer-readable medium to render repeatable data objects streamed over a network | |
| CN107040794A (en) | Video broadcasting method, server, virtual reality device and panoramic virtual reality play system | |
| US20110193932A1 (en) | Conference terminal, conference server, conference system and data processing method | |
| CN103248939A (en) | Method and system for achieving synchronous display of multiple screens | |
| CN105763832A (en) | Video interaction and control method and device | |
| EP3996355B1 (en) | Method for transferring media stream and user equipment | |
| CN106161219A (en) | Message treatment method and device | |
| US20180227340A1 (en) | Virtual video driver bridge system for multi-source collaboration within a web conferencing system | |
| US9756096B1 (en) | Methods for dynamically transmitting screen images to a remote device | |
| KR20140103156A (en) | System, apparatus and method for utilizing a multimedia service | |
| CN114546308A (en) | Application interface screen projection method, device, equipment and storage medium | |
| CN113286190A (en) | Cross-network and same-screen control method and device and cross-network and same-screen system | |
| CN110662101A (en) | Network video multi-path display method and device based on UDP | |
| CN111385518B (en) | Video processing system, video processing method, video processing device, storage medium, and electronic device | |
| US20060288108A1 (en) | Video distribution system having a call control and video distribution coordination server | |
| CN107291409B (en) | Online desktop sharing method and system | |
| KR20040081370A (en) | Control method and system for a remote video chain | |
| CN111385590A (en) | Live broadcast data processing method and device and terminal | |
| CN113726534A (en) | Conference control method, conference control device, electronic equipment and storage medium | |
| KR102164833B1 (en) | Apparatus and method for transmitting multimedia contents | |
| CN108011874B (en) | Low-delay live broadcasting method and system for doll machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200107 |