CN106686466A - Video data positioning method - Google Patents
Video data positioning method Download PDFInfo
- Publication number
- CN106686466A CN106686466A CN201710016545.5A CN201710016545A CN106686466A CN 106686466 A CN106686466 A CN 106686466A CN 201710016545 A CN201710016545 A CN 201710016545A CN 106686466 A CN106686466 A CN 106686466A
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- Prior art keywords
- client
- positioning
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- data
- video data
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Classifications
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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
- H04N21/47—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
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/84—Generation or processing of descriptive data, e.g. content descriptors
-
- 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
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8455—Structuring of content, e.g. decomposing content into time segments involving pointers to the content, e.g. pointers to the I-frames of the video stream
Abstract
The invention provides a video data positioning method, and the method comprises the following steps: adding a content tag sTag to a frame head; enabling video monitoring equipment to carry out the automatic accumulation of the above content tag after the positioning operation of a client; taking the above content tag as a basis for change judgment after the client receives the video data after positioning. The method achieves the marking of the video data before and after positioning through adding one tag sTag in the packaging process of H264/H265 video image frame data (during the design of frame head data) under the condition that a relative timestamp is employed, so as to friendly and precisely control of the effect of remote positioning playback. Moreover, no blurred screen problem happens, and there is no problem of unconformity between play and expectation.
Description
Technical field
The present invention relates to technical field of video monitoring, and in particular to a kind of localization method of video data.
Background technology
Current video monitoring field generally uses H264/H265 coding standards and coding is compressed to video image, reaches
Higher-quality video image is transmitted under the identical network bandwidth.
So-called video is in 1 second by set time equably display image .H264/H265 standard code successively
Image type (being also frame type) is mainly divided to two kinds:Key frame (abbreviation I frames), reference frame (abbreviation P frames) .I frames are characterized in that bag
All image informations at coding moment are included, the scene .P frame for restoring at that time that can be complete according to this is characterized in that with previous moment
Based on image, extract the parts different from current time scene image and this is encoded, therefore reference frame is gone back
Original must fully rely on the frame (I frames or P frames) of its reference.
(such as 1 second) is usually chosen in a fixed cycle in actual application and compiles out an I frame and N number of P frames,
Because I frames include image information completely independently, therefore image data amount is larger. and P frames are simply saved and previous frame scene graph
The part changed as in, exactly because therefore data volume is less. this feature has reused data with existing such that it is able to save
Bandwidth. while exactly because this feature result in a problem:I.e. in network transmission or storing process, once I frames are broken
Bad or discarding, then all frames to before next I frames under connecing can not be correctly reduced to original scene image. one
Denier P frame it is destroyed or abandon also can there is a problem of it is same.
Because H264/H265 coding standards are simply encoded to view data, and for when each two field picture is being opened
Begin to show, show how long these control information (generally this information is referred to as timestamp by us) do not have concrete regulation.
In real process, the method that each manufacturer takes is to add the data of a regular length before view data preserving this
Category information (generally this is referred to as frame head by us). should at least include frame type (I frames or P frames) in existing header content,
Timestamp, frame data physical length etc.
In actual application, there are two methods in the design of timestamp:Absolute timestamp and relative time are stabbed.
The advantage of absolute timestamp is it is obvious that we can know that this two field picture is produced with accurate by this information
Detail time, be accurate to a millisecond rank. if that 0 point 0 second 500 when expressing such as 23 days 12 December in 2016 at a moment
Millisecond, in computer, we have selected 32 integers come millisecond number since expressing 1970, then this value is exactly
More than 1450656000000 (46 years), and the maximum that 32 signless integer can be expressed is 4294967295, then
Must handy 64 integers namely 8 bytes representing. thus and show at least three inferior positions：One, it is the use of 8 words
Section, relative to relative time multiplex 1 byte is stabbed. and two, it two frame times stamp difference is calculated is that 64 digit computings are transported than 32 to be
Calculate amount of calculation big, will also expend substantial amounts of computing resource when the concrete time is converted into by 64 integers in addition, reduce whole
Body performance. three, field of video monitoring video all possesses time osd function, is that the mode for taking hard coded is fused to view data
In, therefore the also just property of there is no need. consider us and take the method for designing of relative time stamp.
Relative time stamp takes 32 integer representation millisecond numbers, starts counting up from 0, and the 1st frame is 0, next frame time
Stamp accumulation time interval (millisecond number) on the basis of previous frame timestamp is 40 milliseconds, the like, the 3rd frame, the 4th frame, N
The timestamp of frame is 80,120, and (N-1) * 40. so a certain two field pictures will show how long i.e. calculate two frame times stamp
Difference. comparatively speaking, the method has evaded the inferior position of absolute timestamp method.
Table 1 is prior art frame head data structure：
Table 1
| Frame type | Relative time is stabbed | Actual image data length |
Intuitively illustrate for convenience in the present invention, here we simplify the complexity applied.Only consider 1 second
1 key frame, 2 reference frames are only encoded in clock. and the video that we to be played only has 4 seconds, and that whole video content can be with
It is described as shown in table 2 below；
Table 2
| Frame number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Frame type | I | P | P | I | P | P | I | P | P | I | P | P |
Below scheme describes process to succinctly using picture format numbering composition will be added to refer to concrete certain frame. such as
P5, I7, P11 represent the 5,7,11st frame, its type be P frames, I frames, P frames.
Prior art video transmission process describes positioning detail.
1, content is played after timing as shown in table 3 with the expected process signal not being inconsistent
Table 3
2, Huaping phenomenon process is played after positioning and is illustrated as shown in table 4
Table 4
The content of the invention
In order to solve the defect of above-mentioned deficiency, the invention provides a kind of localization method of video data, to H264/
In the case that H265 video frame image datas use relative time to stab when frame head data is designed during being packaged, by adding
A sTag has been added to carry out the video data come before and after labelling positioning, to be easily accurately controlled long-range playback positioning with open arms
Effect, is unlikely to cause to spend screen, plays the problems such as not being inconsistent with expection.
The invention provides a kind of localization method of video data, comprises the following steps：
Content identification sTag is added in frame head；
Video monitoring equipment is added up automatically to client operation the above mark；
Client turns to foundation when receiving the video data after positioning so that whether content identification sTag becomes.
Above-mentioned method, wherein, it is described that content identification sTag is added in the step in frame head：Content identification sTag is used
View data before and after showing to position.
Above-mentioned method, wherein, the video monitoring equipment is added up automatically to client operation the above mark
The step of in：If the sTag of each frame is 0 value before positioning, sTag values are 1 after positioning.
Above-mentioned method, wherein, the client is with the content identification of last labelling when receiving next video data
The step of foundation, includes：
Client is abandoned to the data before positioning.
Above-mentioned method, wherein, specifically include following steps：
Client sends request for the first time to Internet；
The first time request of reception is sent to monitoring and prepares and content identification sTag is added in frame head by Internet, its
The initialization value of middle sTag is 0；
The view data of positioning is sent to client and is played out by monitoring device, completes one-time positioning broadcasting.
Above-mentioned method, wherein, the view data of positioning is sent to client and is played out by the monitoring device, complete
The step of playing into one-time positioning also includes：
Client resends second Location Request to monitoring device；
The content identification of second positioning is labeled as sTag values for 1 by monitoring device；
Client receives the content identification of second positioning, and then client is abandoned to the data of labelling before, from
And complete the cumulative of a content identification.
Above-mentioned method, wherein, the client receives new content identification, then data of the client to labelling before
Abandoned, so as to the cumulative step for completing a content identification also includes：
Client sends third time Location Request to monitoring device；
Third time positioning content identification is labeled as sTag values for 2 by monitoring device；
Internet is by the data is activation of the data of second positioning and third time positioning to client；
Client is identified to the data for receiving and is that the data that sTag values are 1 are abandoned by content identification, will be interior
Appearance is labeled as the data that sTag values are 2 and plays out.
The present invention has advantages below：Frame is designed during being packaged to H264/H265 video frame image datas
Head data when using relative time stab in the case of, by with the addition of a sTag come labelling positioning before and after come video data,
To be easily accurately controlled the effect of long-range playback positioning with open arms, be unlikely to cause to spend screen, play with it is expected be not inconsistent etc. ask
Topic.
Description of the drawings
By reading the detailed description made to non-limiting example with reference to the following drawings, the present invention and its feature, outward
Shape and advantage will become more apparent upon.Identical labelling indicates identical part in whole accompanying drawings.Not deliberately proportionally
Draw accompanying drawing, it is preferred that emphasis is the purport of the present invention is shown.
Fig. 1 is a kind of schematic flow sheet of the localization method of video data of the present invention.
Specific embodiment
In the following description, a large amount of concrete details are given to provide more thorough understanding of the invention.So
And, it is obvious to the skilled person that the present invention can be able to without the need for one or more of these details
Implement.In other examples, in order to avoid obscuring with the present invention, for some technical characteristics well known in the art do not enter
Row description.
In order to thoroughly understand the present invention, detailed step and detailed structure will be proposed in following description, so as to
Explaination technical scheme.Presently preferred embodiments of the present invention is described in detail as follows, but in addition to these detailed descriptions, this
Invention can also have other embodiment.
For problems of the prior art, there is flower screen and play not being inconsistent with expection by analysis to be because client
If cannot be distinguished by the video data before and after positioning. can distinguish, it is only necessary to include delaying in Internet by the data before positioning
The view data deposited all is abandoned and emptied, and can precisely play picture material, in other words must realize a reliable frame losing plan
Slightly can be only achieved this target.In the present invention it is noted that be related to for the first time, second it is inferior it is merely meant that for the ease of
The sequencing of Location Request is distinguished, not with special limiting meaning.
With reference to shown in Fig. 1, the invention provides a kind of localization method of video data, comprises the following steps：
Step S1：Content identification sTag is added in frame head, this mark can clearly indicate that positioning before and after picture number
According to.
Step S2：Video monitoring equipment is added up automatically to client operation the above mark, is specifically included, client
End often operates this mark automatically to be added up by video monitoring equipment as one-time positioning, so as to client receives again video data with regard to energy
In this, as distinguishing foundation. the sTag of each frame is 0 value before such as positioning, and sTag values are 1 after positioning, even if the frame before positioning
Data buffer storage is in Internet, but the sTag values of these frames are still value i.e. 0 before positioning, so as to client can calmly by it
Abandon, because the sTag values of the frame data after positioning must not be all 1 with currency.Monitoring device must be made in client
Just sTag can be added up after positioning action.
Step S3：With the content identification of last labelling as foundation when client receives the video data after positioning, due to fixed
Frame data after position are inevitable from the beginning of I frames, therefore will not necessarily produce colored screen problem. also therefore frame losing strategy, necessarily will not
Occur playing the problem not being inconsistent with expection.Client turns to foundation when receiving the video data after positioning so that whether sTag becomes, its
Do not change and just abandon, it is exactly to meet expected video data to have changed.
Wherein relative to frame head data of the prior art, the present invention's it is critical only that there is a mark in frame head data structure
Knowing sTag is used to distinguish the frame image data before and after positioning. the frame head data structure after being improved using the method for patent of the present invention
Schematic diagram is as shown in table 5；
Table 5
| Frame type | Relative time is stabbed | sTag | Actual image data length |
Preferably and in non-limiting embodiment, the localization method of video data specifically includes following steps to the present invention one：
Client sends request for the first time to Internet；The request of first time of reception is sent to monitoring and is prepared and by content mark by Internet
Know sTag to be added in frame head, wherein the initialization value of sTag is 0；The view data of positioning is sent to client by monitoring device
And play out, complete one-time positioning broadcasting.
Preferably and in non-limiting embodiment, wherein the view data of positioning is sent to visitor to the present invention one by monitoring device
Family end simultaneously plays out, and completes also to include the step of one-time positioning is played：Client resends second Location Request to prison
Control equipment；The content identification of second positioning is labeled as sTag values for 1 by monitoring device；Client receives the content of second positioning
Mark, then client is abandoned to the data of labelling before, so as to complete the cumulative of a content identification.
Preferably and in non-limiting embodiment, wherein client receives new content identification to the present invention one, then client
The data to labelling before are held to abandon, so as to the cumulative step for completing a content identification also includes：Client sends
Third time Location Request is to monitoring device；Third time positioning content identification is labeled as sTag values for 2 by monitoring device；Internet will
Second positioning data and third time positioning data is activation to client；Client is identified simultaneously to the data for receiving
It is that the data that sTag values are 1 are abandoned by content identification, content identification is labeled as into the data that sTag values are 2 and is played out.
A specific embodiment presented below being expanded on further the present invention, with reference to shown in table 6.
Table 6
As can be seen from Table 6, the process for implementing of the invention is：Playback request is sent in T0 moment client
(C->V) to Internet, Internet forwarding playback request to monitoring device, monitoring device receives playback request and gets ready. just
Beginningization sTag is 0；Monitoring device completes the transmission of 6 two field pictures, and wherein Internet forwards 4 frame data, and 2 frames of caching are P5, P6, its
In this 6 frame data frame head structure in sTag=0；Client receives 4 frames, has played 2 two field pictures, next should play P3,
Wherein sTag=0 in the frame head structure of this 4 frame data；
At the T2 moment, client initiates request and navigates to I7, and Internet forwards Location Request to monitoring device, monitoring device
Receive request to get ready, now client empties immediately the 2 frames i.e. P3 not played, I4.
At the T3 moment, it is P6 that Internet forwarding P5 (V-C) caches 1 frame, including the frame and current cache frame for having sent still
STag=0, client is because I4 is I frames but is dropped at the T2 moment, and the P5 for newly receiving is with dependence on I4, according to set frame losing plan
Slightly and detect that its sTag=0 belongs to data before positioning and failed and make discard processing. so as to avoid, directly play will
Flower screen problem.
T4 moment, monitoring device completes I7 transmissions, is 1 because data sTag for being new definition accumulate once i.e. value, networking
Layer completes P6 and is sent to client, caches I7, the sTag=0 of P6；The sTag for newly receiving I7 is 1, and client receives P6, and process is done
Repeat no more as when method and T3.
T5 moment, networking layer forwards I7, now the sTag=1 of I7, and client receives I7 and detects sTag=1 (positioning
Front sTag=0) be that sTag there occurs change, that is, can determine that this frame data has been the data after positioning, it should carry out normal
Broadcasting, so far position fixing process normally complete.
T6 moment, monitoring device sends P8, P9, I10, sTag=1 because no-fix, sTag this value be always maintained at it is constant,
Internet forwards P8, P9. caching I10, the sTag=1 of P8, P9, I10, client to receive P8, and P9, sTag remains as 1, no to send out
Changing, normal play.
T7 moment, client initiates request and navigates to I4, then Internet forwarding Location Request, and monitoring device receives request
Get ready.
T8 moment, monitoring device sends I4, now content identification sTag=2, Internet forwarding I10, stag=1, caching
I4, sTag=2, client receives I10, and because I10 is I frames, directly playing will not spend screen. but because the sTag values of I10 are 1,
Expression is the data before positioning, and set strategy is to abandon, and so as to avoid the problem not being inconsistent with expection is played.
T9 moment, Internet forwards I4 to client, and now content identification is stag=2, and client receives I4 and detects
STag values are 2, there occurs change, represent the data for receiving now be position after, therefore, it is possible to normal play, so far into
Work(completes one-time positioning process.
Presently preferred embodiments of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, wherein the equipment and structure that do not describe in detail to the greatest extent are construed as giving reality with the common mode in this area
Apply；Any those of ordinary skill in the art, under without departing from technical solution of the present invention ambit, all using the disclosure above
Methods and techniques content make many possible variations and modification to technical solution of the present invention, or be revised as equivalent variations etc.
Effect embodiment, this has no effect on the flesh and blood of the present invention.Therefore, every content without departing from technical solution of the present invention, foundation
The technical spirit of the present invention still falls within the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification
In the range of technical scheme protection.
Claims (7)
1. a kind of localization method of video data, it is characterised in that comprise the following steps：
Content identification sTag is added in frame head；
Monitoring device is automatically added up the above mark after client location operation；
Next effective video data are received after client location basis on location is turned to above-mentioned content identification change.
2. a kind of localization method of video data as claimed in claim 1, it is characterised in that described to add content identification sTag
It is added in the step in frame head：Content identification sTag is used to show the view data before and after positioning.
3. a kind of localization method of video data as claimed in claim 2, it is characterised in that the monitoring device is to client
Operation the above mark is carried out in automatically cumulative step：If the sTag of each frame is 0 value, sTag after positioning before positioning
It is worth for 1.
4. a kind of localization method of video data as claimed in claim 1, it is characterised in that the client location is followed by
The step of next effective video data are received with the content identification of last labelling as basis on location includes：
Client is abandoned to the data before positioning.
5. the localization method of a kind of video data as described in any one of claim 1-4, it is characterised in that specifically include following
Step：
Client sends request for the first time to Internet；
The first time request of reception is sent to monitoring and prepares and content identification sTag is added in frame head by Internet, wherein
The initialization value of sTag is 0；
The view data of positioning is sent to client and is played out by monitoring device, completes one-time positioning broadcasting.
6. a kind of localization method of video data as claimed in claim 5, it is characterised in that the monitoring device will be positioned
View data is sent to client and plays out, and completes also to include the step of one-time positioning is played：
Client resends second Location Request to monitoring device；
The content identification of second positioning is labeled as sTag values for 1 by monitoring device；
Client receives the video data that the content identification of second positioning is 1, then client to be labeled as before 0 video
Data are abandoned, so as to complete the cumulative of a content identification.
7. a kind of localization method of video data as claimed in claim 6, it is characterised in that the client receives new interior
Hold mark, then client is abandoned to the data of labelling before, so as to complete a content identification cumulative step also
Including：
Client sends third time Location Request to monitoring device；
Third time positioning content identification is labeled as sTag values for 2 by monitoring device；
Internet is by the data is activation of the data of second positioning and third time positioning to client；
Client is identified to the data for receiving and is that the data that sTag values are 1 are abandoned by content identification, by content mark
Knowledge is labeled as the data that sTag values are 2 and plays out.
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| CN201710016545.5A CN106686466B (en) | 2017-01-10 | 2017-01-10 | Video data positioning method |
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| CN201710016545.5A CN106686466B (en) | 2017-01-10 | 2017-01-10 | Video data positioning method |
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Cited By (1)
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| CN106686466B (en) | 2020-10-23 |
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