CN106993231B - Method and system for playing video by selecting segments - Google Patents
Method and system for playing video by selecting segments Download PDFInfo
- Publication number
- CN106993231B CN106993231B CN201710212647.4A CN201710212647A CN106993231B CN 106993231 B CN106993231 B CN 106993231B CN 201710212647 A CN201710212647 A CN 201710212647A CN 106993231 B CN106993231 B CN 106993231B
- Authority
- CN
- China
- Prior art keywords
- playing
- video
- data
- point
- current
- 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.)
- Expired - Fee Related
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
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
-
- 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
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47217—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for controlling playback functions for recorded or on-demand content, e.g. using progress bars, mode or play-point indicators or bookmarks
-
- 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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/81—Monomedia components thereof
- H04N21/8166—Monomedia components thereof involving executable data, e.g. software
- H04N21/8193—Monomedia components thereof involving executable data, e.g. software dedicated tools, e.g. video decoder software or IPMP tool
Abstract
The invention provides a method for playing video by selecting segments, which comprises the steps of creating a player control, and assigning a video file address to the attribute of the player control; setting playing data, wherein the playing data comprises a starting point and an ending point, and setting the cycle number of each group of playing data; creating a timer, acquiring a current playing position and playing times, and if the current playing position is greater than or equal to an end point and the playing times are equal to the cycle times, pausing the playing; if the current playing position is larger than or equal to the end point and the playing times are smaller than the cycle times, the video segment is played again according to the playing data; if the current playing position is smaller than the end point, continuing to play the video; the invention also provides a system for playing the video by selecting the segments, which is simple to realize and operate.
Description
Technical Field
The invention relates to a method and a system for playing video by selecting segments.
Background
In recent years, education is modernized and electronized, and along with the increase of the investment of the nation in education, the education shows a happy scene at present. In the actual teaching process, video teaching has become one of the most common teaching methods, however, in the teaching process, a teacher often needs to extract a part of a complete video segment, not the whole, or extract some segments of the complete video for explanation. At present, the solution to this problem is basically based on a video encoding and decoding mode, and has high difficulty coefficient, complex operation and difficult realization.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and a system for playing a video by selecting segments, which are simple in implementation and convenient to operate.
One of the present invention is realized by: a method for playing video clips comprises the following steps:
step 1, creating a player control, and assigning a video file address to the player control attribute;
step 2, setting playing data, wherein the playing data comprises a starting point and an ending point, and setting the cycle number of each group of playing data;
step 3, a timer is established, the current playing position and the playing times are obtained,
if the current playing position is larger than or equal to the end point and the playing times are equal to the circulation times, pausing the playing;
if the current playing position is larger than or equal to the end point and the playing times are smaller than the cycle times, the video segment is played again according to the playing data;
and if the current playing position is smaller than the end point, continuing to play the video.
Further, in the step 2, the playing data includes at least a start point and an end point; and when playing, sequentially playing each video segment according to the front-back sequence of the starting point.
Further, step 4, storing the playing data.
The second invention is realized by the following steps: a system for playing video clips comprises the following modules:
the creating module is used for creating a player control and assigning the video file address to the player control attribute;
the setting module is used for setting playing data, wherein the playing data comprises a starting point and an ending point, and the cycle number of each group of playing data is set;
a playing module for creating a timer to obtain the current playing position and playing times,
if the current playing position is larger than or equal to the end point and the playing times are equal to the circulation times, pausing the playing;
if the current playing position is larger than or equal to the end point and the playing times are smaller than the cycle times, the video segment is played again according to the playing data;
and if the current playing position is smaller than the end point, continuing to play the video.
Further, in the setting module, the playing data includes at least a start point and an end point; and when playing, sequentially playing each video segment according to the front-back sequence of the starting point.
Further, the system also comprises a storage module for storing the playing data.
The invention has the following advantages: the invention relates to a method and a system for playing video by selecting segments, which can play the video by selecting segments without destroying the data of a video file and starting from a video coding and decoding mode; the method is simple to realize and is friendly to operate; the method and the system do not need to specially develop a player, encode and decode, do not need to manage the specific format of the video, and do not damage the data content of the video in the realization process; is very simple and practical.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
FIG. 1 is a flow chart of the method of the present invention.
FIG. 2 is a schematic block diagram of the system of the present invention.
Detailed Description
As shown in fig. 1, the method for playing video clips of the present invention includes the following steps:
step 1, creating a player control, and assigning a video file address to the player control attribute;
step 2, setting playing data, wherein the playing data comprises a starting point and an ending point, and setting the cycle number of each group of playing data, and the playing data comprises at least one starting point and at least one ending point; when playing, each video segment is played in sequence according to the front-back sequence of the starting point;
step 3, a timer is established, the current playing position and the playing times are obtained,
if the current playing position is larger than or equal to the end point and the playing times are equal to the circulation times, pausing the playing;
if the current playing position is larger than or equal to the end point and the playing times are smaller than the cycle times, the video segment is played again according to the playing data;
and if the current playing position is smaller than the end point, continuing to play the video.
And 4, storing the playing data.
As shown in fig. 2, the system for playing video clips of the present invention includes the following modules:
the creating module is used for creating a player control and assigning the video file address to the player control attribute;
the setting module is used for setting playing data, wherein the playing data comprises a starting point and an end point, and setting the cycle number of each group of playing data, and the playing data comprises at least one starting point and at least one end point; when playing, each video segment is played in sequence according to the front-back sequence of the starting point;
a playing module for creating a timer to obtain the current playing position and playing times,
if the current playing position is larger than or equal to the end point and the playing times are equal to the circulation times, pausing the playing;
if the current playing position is larger than or equal to the end point and the playing times are smaller than the cycle times, the video segment is played again according to the playing data;
and if the current playing position is smaller than the end point, continuing to play the video.
And the storage module is used for storing the playing data.
In this embodiment, Delphi is used as a development tool.
A method for playing video clips based on software implementation comprises the following steps:
for convenience of explanation, we assume that a video with a playing time of one hour (3600 seconds) needs to be edited and played by a selected segment.
Step 1: the function description of video segment selection playing; the detailed description is as follows:
step 11: on the premise of not modifying the structure of a video file per se, the video segment to be played can be randomly defined for any segment of completely played video;
the explanation is as follows: the coding structure of the video is not modified and damaged, and the video is not specially processed after being processed by the method provided by the invention; so that the video file cannot be played by other players. This point is also one of the main features of the present invention.
Step 12: the videos of a plurality of selection segments can be defined at the same time, and the intersection of the plurality of selection segments in the playing time is allowed to exist;
the explanation is as follows: the video in the example can be segmented into three segments as follows:
a first stage: 10 th second to 100 th second
And a second stage: 1200 th second to 2500 th second
A third stage: 50 th second to 2000 th second
It is clear from the above that there is a temporal intersection of the first clip video with the third clip video. In the invention, if three video segments are played continuously, the three video segments are played in sequence without mutual interference.
Step 13: any selected video segment can be modified; examples are as follows:
once the second playing time (1200 th-2500 th seconds) listed in connection with step 12 is confirmed, the time for starting playing and the time for ending playing can be modified again.
Step 14: the prepared relevant data of the video selection can be stored, restored, opened and reproduced; examples are as follows:
by combining the three selected video segments listed in step 12, the information such as the playing start time and the playing end time of each video segment, the playing sequence of each video segment, the number of times of the loop playing, etc. can be saved, for example, saved as a recording file; the recording file is opened by software next time, so that the information of the playing time period, the playing sequence among the video segments, the circulating playing frequency and the like of each video segment still exist perfectly, and a user can use the recording file directly without remaking the recording file.
Step 2: modeling is realized by the video segment selection playing function; the detailed description is as follows:
step 21: establishing a model, and defining parameters necessary for the model;
step 22: defining a business logic relation and an implementation method according to the model;
each clip play is an instance of the data structure defined in step 21. For example, 3600 seconds of video is segmented into three segments as follows:
| sName | fStartPos | fEndPos | iSort | bLoop | iPlayCount | |
| first stage | First segment video | 10 | 100 | 1 | False | 1 |
| Second section | Second segment video | 1200 | 2500 | 2 | True | 0 |
| Third stage | Third segment video | 50 | 2000 | 3 | False | 3 |
In the first period, the start time is 10 seconds, the end time is 100 seconds, the playing sequence is 1, the playing is not circulated, and the playing times are 1 time;
in the second section, the starting time is 1200 seconds, the ending time is 2500 seconds, the playing sequence is 2, the playing is circulated, and the playing times is 0; specifically, the following description is provided: because the video is played circularly, the playing times have no practical significance, and the video can be played circularly all the time without user intervention;
the third section, the starting time is 50 th second, the ending time is 2000 th second, the playing sequence is 3, the playing is not circulated, and the playing times is 3; namely: the video is played three times continuously;
the playing sequence (iSort) is arranged from small to large, the first section is played, the second section is played, and the third section is played finally;
and step 3: a scheme for storing and recovering data played by video section selection;
step 31: defining and explaining which parameters in the model need to be stored and how to store;
obviously, all the parameters listed in the step 2 need to be saved, and the listed parameters can be selected whether to need to be saved according to the actual situation; the storage mode can write the relevant parameters into a configuration file, which can be a text file or a binary file; the data structure of the file can be determined according to the actual situation, and can be an xml structure, a json structure or even a self-defined structure;
step 32: defining and specifying those parameters in the model that allow the reopen to be resumed;
it is clear that more than the parameters listed in 2 are needed to support the recovery of open renditions. I.e. for the file save data structure defined in step 31, there is an inverse process of reading the configuration file.
The xml data structure, json data structure and custom data structure related to the steps 31 and 32 generally have corresponding analysis function libraries to be called according to the selected development tool and development language, and the data structure provided by the invention is relatively simple and easy to implement.
And 4, step 4: a software implementation description of video clip playing;
this side selects Delphi as a development tool and a video player with twindown mediaplayer.
The interface function functions of playing, pausing, fast forwarding, backing and the like of the player are utilized in the implementation process. Such a call interface, which is provided for most programming languages and video players, is somewhat different in situation, but the same in nature.
And 5: the practical use significance of the video section selection playing;
the method provided by the invention is completely independent of the video file, independent of any video coding and decoding, free of any new video file, and only needs to store some necessary model parameters, so that the method is simple and convenient to operate, accurate in positioning and simple to realize.
Nowadays, electronic whiteboard software is widely applied in the education field, the idea provided by the invention can be combined with the video playing function, for example, after the combination, the idea can be annotated, drawings and the like on the playing picture of the video, and the annotated pictures can be stored, so that teachers can change the pictures vividly in class.
The following are the specific implementation steps using delphi as a programming tool:
first, a player control TWindowsMediaPlayer instance fomediplayer is created, and a path address of a video file is assigned to a player control attribute:
FoMediaPlayer.URL:＝FsVideoFileName；
FsVideoFileName: is the path of the video file.
And secondly, modifying the method attribute of the player:
the formulary control currentposition can modify the position of playback so as to reach the start and end position points that define the playback of the clip. And stores the location information. I.e. the parameters defining the model:
fStartPos: Real; // Play Start position (Play Start time)
fEndPos: Real; // Play end position (Play end time)
And thirdly, setting the playing times of the selected segments and whether to play circularly on the basis of the first step and the second step.
And fourthly, forming a list with sequential significance by the sections edited in the first step to the third step.
And fifthly, a timer is established, and the user judges the playing position in real time within the range allowed by the error and memorizes the corresponding space.
// timer
FoCatchPosTimer:＝TTimer.Create(FoCatchVideoPnl)；
FoCatchPosTimer.Interval:＝100；
FoCatchPosTimer.OnTimer:＝FoCatchPosTimerTimer；
As listed above, a timer is created that triggers an event decision every 100 milliseconds. The timer-triggered event is executed in the function foctchpostimertimer. 100 milliseconds inside this
And sixthly, defining the execution content of the timer trigger event.
The determination is performed every 100 milliseconds. According to the playing position of the current video:
FoMediaPlayer.controls.currentPosition
judging the starting position and the ending position of the current playing position and the current playing selection time, if the starting position and the ending position are more than or equal to the ending position: fEndPos:
if the current playing is the loop playing or the playing times are more than once, directly setting the current playing position back to the starting position of the current selection segment position:
FoMediaPlayer.controls.currentPosition:＝fStartPos；
then, the playback is started to continue:
FoMediaPlayer.controls.play；
(2) if the selected segment is not played circularly or the playing times are reached; then
The first situation is as follows: if the playlist is played in sequence and there is a next selection, setting the playing position of the player as the starting position of the next selection:
FoMediaPlayer.controls.currentPosition:＝fStartPosNext；
then, the playing is started:
FoMediaPlayer.controls.play；
case two: if the playlist is the live current selection or there is no previous selection, the player is paused for playing:
FoMediaPlayer.controls.pause；
seventh step, like the common video and audio player, the user can click the segment to be played at any time. As long as the start position of the player is set to the "clip position" desired to be played:
FoMediaPlayer.controls.currentPosition:＝fStartPosSelect；
meanwhile, the end position is set as the "clip" end position desired to be played: fEndPosSelect;
the others are the same as the sixth step.
Step eight, storing the selected segment video, and only storing corresponding selected segment information, for example, storing the selected segment information as a binary file, wherein the main core processing is as follows:
len:＝Length(sName)；
stream.WriteBuffer(len,SizeOf(len))；
stream.WriteBuffer(sName[1],len)；
stream.WriteBuffer(fStartPos,SizeOf(fStartPos))；
stream.WriteBuffer(fEndPos,SizeOf(fEndPos))；
stream.WriteBuffer(iSort,SizeOf(iSort))；
stream.WriteBuffer(bLoop,SizeOf(bLoop))；
stream.WriteBuffer(iPlayCount,SizeOf(iPlayCount))；
opening the selected video, just processing the opposite way, and the main core processing is as follows:
stream.ReadBuffer(len,SizeOf(len))；
SetLength(sName,len)；
stream.ReadBuffer(sName[1],len)；
stream.ReadBuffer(fStartPos,SizeOf(fStartPos))；
stream.ReadBuffer(fEndPos,SizeOf(fEndPos))；
stream.ReadBuffer(iSort,SizeOf(iSort))；
stream.ReadBuffer(bLoop,SizeOf(bLoop))；
although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (6)
1. A method for playing video by selecting segments is characterized in that: the method comprises the following steps:
step 1, creating a player control, and assigning a video file address to the player control attribute;
step 2, setting playing data, wherein the playing data comprises a starting point and an ending point, and setting the cycle times of each group of playing data, and the video segments of the starting point and the ending point are a segment of selected video intercepted from an integral video;
step 3, a timer is established, the current playing position and the playing times are obtained,
if the current playing position is larger than or equal to the end point and the playing times are equal to the circulation times, pausing the playing;
if the current playing position is larger than or equal to the end point and the playing times are smaller than the cycle times, the video segment is played again according to the playing data;
and if the current playing position is smaller than the end point, continuing to play the video.
2. The method of claim 1, wherein: in step 2, the playing data comprises at least a start point and an end point; and when playing, sequentially playing each video segment according to the front-back sequence of the starting point.
3. The method of claim 1, wherein: and step 4, storing the playing data.
4. A system for playing a selected segment of a video, comprising: the system comprises the following modules:
the creating module is used for creating a player control and assigning the video file address to the player control attribute;
the setting module is used for setting playing data, wherein the playing data comprises a starting point and an ending point, and the cycle times of each group of playing data are set, and the video segments of the starting point and the ending point are a segment of selected video intercepted from an integral video;
a playing module for creating a timer to obtain the current playing position and playing times,
if the current playing position is larger than or equal to the end point and the playing times are equal to the circulation times, pausing the playing;
if the current playing position is larger than or equal to the end point and the playing times are smaller than the cycle times, the video segment is played again according to the playing data;
and if the current playing position is smaller than the end point, continuing to play the video.
5. The system of claim 4, wherein: in the setting module, the playing data comprises at least a starting point and an ending point; and when playing, sequentially playing each video segment according to the front-back sequence of the starting point.
6. The system for playing the video clips of claim 4, wherein: the device also comprises a storage module for storing the playing data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710212647.4A CN106993231B (en) | 2017-04-01 | 2017-04-01 | Method and system for playing video by selecting segments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710212647.4A CN106993231B (en) | 2017-04-01 | 2017-04-01 | Method and system for playing video by selecting segments |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106993231A CN106993231A (en) | 2017-07-28 |
| CN106993231B true CN106993231B (en) | 2020-02-18 |
Family
ID=59415791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710212647.4A Expired - Fee Related CN106993231B (en) | 2017-04-01 | 2017-04-01 | Method and system for playing video by selecting segments |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106993231B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114071208B (en) * | 2020-08-03 | 2023-11-28 | 中车株洲电力机车研究所有限公司 | Man-machine interaction device for TCMS and video display and control method thereof |
| CN113630657A (en) * | 2021-08-03 | 2021-11-09 | 广东九联科技股份有限公司 | Video playing optimization method and system based on hls protocol |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102682820A (en) * | 2012-05-03 | 2012-09-19 | 福建星网视易信息系统有限公司 | Method and system for embedding type linux platform media playing |
| CN102842317A (en) * | 2011-06-20 | 2012-12-26 | 腾讯科技（深圳）有限公司 | Multimedia playing method and player |
| CN103947216A (en) * | 2011-09-23 | 2014-07-23 | 谷歌公司 | Video segment presentaton tracking |
| CN104780456A (en) * | 2015-04-29 | 2015-07-15 | 无锡天脉聚源传媒科技有限公司 | Video dotting and playing method and device |
| CN105376612A (en) * | 2014-08-26 | 2016-03-02 | 华为技术有限公司 | Video playing method, media equipment, playing equipment and multimedia system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7801409B2 (en) * | 2004-03-19 | 2010-09-21 | Microsoft Corporation | Glitch-free realtime playback |
| KR100860547B1 (en) * | 2007-03-02 | 2008-09-26 | 광주과학기술원 | Method and Apparatus for Authoring Tactile Information, and Computer Readable Medium Including the Method |
| US20120017153A1 (en) * | 2010-07-15 | 2012-01-19 | Ken Matsuda | Dynamic video editing |
-
2017
- 2017-04-01 CN CN201710212647.4A patent/CN106993231B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842317A (en) * | 2011-06-20 | 2012-12-26 | 腾讯科技（深圳）有限公司 | Multimedia playing method and player |
| CN103947216A (en) * | 2011-09-23 | 2014-07-23 | 谷歌公司 | Video segment presentaton tracking |
| CN102682820A (en) * | 2012-05-03 | 2012-09-19 | 福建星网视易信息系统有限公司 | Method and system for embedding type linux platform media playing |
| CN105376612A (en) * | 2014-08-26 | 2016-03-02 | 华为技术有限公司 | Video playing method, media equipment, playing equipment and multimedia system |
| CN104780456A (en) * | 2015-04-29 | 2015-07-15 | 无锡天脉聚源传媒科技有限公司 | Video dotting and playing method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106993231A (en) | 2017-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100488242C (en) | Method and apparatus for repetitive playback of a video section based on subtitles | |
| CN106257930B (en) | Generate the dynamic time version of content | |
| US20140147095A1 (en) | Semi-automatic generation of multimedia content | |
| KR102024933B1 (en) | apparatus and method for tracking image content context trend using dynamically generated metadata | |
| US10880595B2 (en) | Method and apparatus for adjusting virtual reality scene, and storage medium | |
| WO2017062961A1 (en) | Methods and systems for interactive multimedia creation | |
| CN106993231B (en) | Method and system for playing video by selecting segments | |
| CN110505498A (en) | Processing, playback method, device and the computer-readable medium of video | |
| WO2022000991A1 (en) | Expression package generation method and device, electronic device, and medium | |
| US20180143741A1 (en) | Intelligent graphical feature generation for user content | |
| CN113395605B (en) | Video note generation method and device | |
| CN106326948A (en) | Multimedia book reading method, multimedia book reading terminal and multimedia book reading background server | |
| JP2008537439A (en) | Method, apparatus, and system for creating editing operation list of media content recorded in advance | |
| CN110784753A (en) | Interactive video playing method and device, storage medium and electronic equipment | |
| WO2016101849A1 (en) | Instant messenger method, client and system based on dynamic image grid | |
| CN108153882A (en) | A kind of data processing method and device | |
| JP2010268195A (en) | Video content editing program, server, apparatus and method | |
| CN104994429A (en) | Video playing method and device | |
| CN101803378B (en) | Method and apparatus for generating and accessing metadata in media file format | |
| KR20150010284A (en) | E-learning content authoring appratus using template and method thereof | |
| CN106792219B (en) | It is a kind of that the method and device reviewed is broadcast live | |
| CN106162376A (en) | A kind of multimedia is compiled as the method and device of video playback file automatically | |
| JP7297084B2 (en) | INTERNET MEME GENERATION METHOD AND DEVICE, ELECTRONIC DEVICE AND MEDIUM | |
| KR101721231B1 (en) | 4D media manufacture methods of MPEG-V standard base that use media platform | |
| CN102473088A (en) | Media processing comparison system and techniques |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |