CN107800989A - Image display method, system and Network Personal Video Recorder based on the detection of dynamic frame per second - Google Patents
Image display method, system and Network Personal Video Recorder based on the detection of dynamic frame per second Download PDFInfo
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- CN107800989A CN107800989A CN201710962860.7A CN201710962860A CN107800989A CN 107800989 A CN107800989 A CN 107800989A CN 201710962860 A CN201710962860 A CN 201710962860A CN 107800989 A CN107800989 A CN 107800989A
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- 238000001514 detection method Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000008859 change Effects 0.000 claims abstract description 41
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440281—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the temporal resolution, e.g. by frame skipping
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0127—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Closed-Circuit Television Systems (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
The present invention discloses image display method, system and Network Personal Video Recorder based on the detection of dynamic frame per second, wherein, image display method includes step：A, web camera gathers video data and encoded, then the code stream after coding is sent to Network Personal Video Recorder；B, Network Personal Video Recorder carries out frame per second detection to the code stream received, if detecting, frame per second changes, the frame per second after record change, and the code stream is decoded according to the frame per second after change；C, decoded video data transmitting is delivered on display and shown.Before the present invention decodes to the code stream received, frame per second is first detected, so when detecting that frame per second changes, is decoded according to the frame per second after change, so as to thoroughly solve the problems, such as that abnormal, interim card occurs in video, improve the fluency of video playback.
Description
Technical field
The present invention relates to protection and monitor field, more particularly to based on dynamic frame per second detection image display method, system and
Network Personal Video Recorder.
Background technology
In recent years with the fast development of Internet technology, security protection video monitoring trade also enter networking, it is intelligent when
Generation.Networking, the security protection network monitoring of intellectualization times are just showing the characteristic of strong internet industry.
In security protection video monitoring system, NVR (Network Personal Video Recorder) is sent in preview and playback IPC (web camera)
During bit stream data, because the frame per second of video data changes in real time, video can be caused to occur picture exception when decoding,
The problems such as video cardton.The main reason for causing the problem is due to IPC when monitoring, in order under special environment,
Reach the effect of more preferable monitoring video, so as to carry out certain regulation to frame per second.For example at night, IPC can carry out dropping at frame
Reason, so as to cause the frame per second of actual video data to change.
Because security protection industry access IPC frame per second will not vary widely, so processing in this respect is fewer, but
It is under special screne, there is the demand that frame per second changes again, is typically all now manually to adjust or pass through the long period
Statistics, solves problems using average frame per second.But deficiency existing for this solution method is to need artificial intervention and system
Meter, and video when frame per second changes still be present and the problems such as interim card, flower screen occur.
Therefore, prior art has yet to be improved and developed.
The content of the invention
In view of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide the video detected based on dynamic frame per second to show
Method, system and Network Personal Video Recorder, it is intended to solve security protection video in the prior art and the problems such as interim card, flower screen occur.
Technical scheme is as follows：
A kind of image display method based on the detection of dynamic frame per second, wherein, including step：
A, web camera gathers video data and encoded, then the code stream after coding is sent to Network Personal Video Recorder；
B, Network Personal Video Recorder carries out frame per second detection to the code stream received, if detecting, frame per second changes, record change
Frame per second afterwards, and the code stream is decoded according to the frame per second after change；
C, decoded video data transmitting is delivered on display and shown.
The described preview detected based on dynamic frame per second and back method, wherein, in the step B, Network Personal Video Recorder connects
After receiving code stream, the code stream is preserved.
The described image display method based on the detection of dynamic frame per second, wherein, in the step C, connect by VGA/HDMI
Shown on mouth output to display.
The described image display method based on the detection of dynamic frame per second, wherein, the step A is specifically included：
A1, web camera collection video data are simultaneously encoded, and the code stream after coding is sent to interchanger；
Code stream after coding is forwarded to Network Personal Video Recorder by A2, interchanger.
The described image display method based on the detection of dynamic frame per second, wherein, also include after the step C：
After Network Personal Video Recorder receives play-back command, preserved code stream is read, and carries out frame per second detection, if detecting frame
Rate is changed, the frame per second after record change, and the code stream is decoded according to the frame per second after change, is then forwarded to aobvious
Show and shown on device.
The described image display method based on the detection of dynamic frame per second, wherein, also include after the step C：
After Network Personal Video Recorder receives addition instruction, web camera is searched for, and add the web camera searched.
A kind of Network Personal Video Recorder, wherein, including：
Flow module is received, for receiving code stream；The code stream is that web camera gathers video and obtained after being encoded
Code stream；
Frame per second detection module, for carrying out frame per second detection to the code stream received, if detecting, frame per second changes, record
Frame per second after change；
Decoder module, it is used for and the code stream is decoded according to the frame per second after change；
Output module, shown for decoded video data transmitting to be delivered on display.
Described Network Personal Video Recorder, wherein, in addition to：
Code stream memory module, for preserving the code stream received.
A kind of video display system based on the detection of dynamic frame per second, wherein, including web camera, the network being sequentially connected
Video recorder and display screen；
The web camera gathers video data and encoded, then the code stream after coding is sent to network and recorded a video
Machine；
The Network Personal Video Recorder carries out frame per second detection to the code stream received, if detecting, frame per second changes, and record becomes
Frame per second after change, and the code stream is decoded according to the frame per second after change；Then decoded video data transmitting is delivered to
Display；
The display is shown to the video data received.
The described video display system based on the detection of dynamic frame per second, wherein, the Network Personal Video Recorder passes through VGA/HDMI
Interface is connected to display.
Beneficial effect：Before the present invention decodes to the code stream that receives, frame per second is first detected, so when detecting that frame per second sends out
During changing, decoded according to the frame per second after change, so as to thoroughly solve the problems, such as that abnormal, interim card occurs in video, improved
The fluency of video playback.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the image display method preferred embodiment based on the detection of dynamic frame per second of the present invention.
Fig. 2 is the Method And Principle block diagram of the present invention.
Fig. 3 is the video display system Organization Chart of the present invention.
Embodiment
The present invention provides a kind of preview and back method, system based on the detection of dynamic frame per second, for make the purpose of the present invention,
Technical scheme and effect are clearer, clear and definite, and the present invention is described in more detail below.It is it should be appreciated that described herein
Specific embodiment only to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 1, Fig. 1 is a kind of stream of the image display method preferred embodiment based on the detection of dynamic frame per second of the present invention
Cheng Tu, it includes step：
S1, web camera collection video data are simultaneously encoded, then the code stream after coding is sent to Network Personal Video Recorder；
S2, Network Personal Video Recorder carry out frame per second detection to the code stream received, if detecting, frame per second changes, record change
Frame per second afterwards, and the code stream is decoded according to the frame per second after change；
S3, decoded video data transmitting is delivered on display shown.
In the method for the present invention, before decoding is carried out to code stream and is shown, frame per second detection first is carried out to code stream, so can be accurate
Really judge whether the frame per second of code stream changes, if changing, then code stream is decoded according to the frame per second after change, institute
Even if being changed with frame per second, be also not in interim card, spend situations such as screen.
Further, the step S1 is specifically included：
S11, web camera collection video data are simultaneously encoded, and the code stream after coding is sent to interchanger；
Code stream after coding is forwarded to Network Personal Video Recorder by S12, interchanger.
With reference to shown in Fig. 2, in the step S11, terminal device web camera (IPC) 100 is the master of video acquisition
Want source.After web camera 100 gathers video data, video data is encoded, the code stream after coding is sent to friendship
Change planes.Web camera 100 can be set it is multiple, such as 10, and unified send to interchanger.
In the step S12, the effect of interchanger is to be forwarded the code stream after compressed encoding, that is, is transmitted to network
Video recorder 200.
In the step S2, after Network Personal Video Recorder 200 receives code stream, frame per second detection is carried out to the code stream received.
This step mainly judges whether frame per second is changed, if changed, and also according to the frame before change
Rate is decoded, then phenomena such as interim card or flower shield occurs.So the present invention, when detecting that frame per second changes, record changes
Frame per second afterwards, and the code stream is decoded according to the frame per second after change, so it can make video playback before and after frame per second change
It is more smooth, occur the problems such as playing interim card during without causing frame per second to change suddenly.It is no in the prior art to pass through step S2
Processing, but directly decoded after code stream is received according to unified frame per second, so the problems such as causing interim card.
In the step S3, decoded video data transmitting is delivered on display 300 and shown.
For multiple web cameras 100, step S2 processing is may pass through, then by treated each code stream
Integrated, i.e., integrated multichannel data, be then forwarded on display 300 and shown.
Further, in the step S3, exported by VGA/HDMI interfaces to being shown on display 300.VGA or
HDMI can realize the transmission of video data.
Further, in the step S2, after Network Personal Video Recorder 200 receives code stream, the code stream is preserved.Preserve the code
The purpose of stream is to be played back for convenience, to carry out transferring and browsing for video.
Specifically, also include after the step S3：
After Network Personal Video Recorder 200 receives play-back command, preserved code stream is read, and carries out frame per second detection, if detection
Changed to frame per second, the frame per second after record change, and the code stream is decoded according to the frame per second after change, then send
Shown on to display 300.
Some are similar for the process of playback and the foregoing process played in real time, only need from the preserved code stream of reading,
Then frame per second detection is carried out again, in the case of frame per second change occurs, then the frame per second after record changes, according still further to the frame after change
Rate is decoded, and is shown.
So during video playback, the problems such as being also not in video cardton or spend screen, so that it is guaranteed that playing back
Journey it is smooth.
Further, also include after the step S3：
After Network Personal Video Recorder 200 receives addition instruction, web camera 100 is searched for, and adds the network searched and takes the photograph
Camera 100.
Web camera 100 can set it is multiple, when need increase web camera 100 when, then can be recorded a video to network
Machine 200 sends addition instruction, the web camera 100 that such Network Personal Video Recorder 200 will be searched in network, and the net that will be searched
Network video camera 100 is added in whole system, and receives the video data that the web camera 100 newly added is shot, and carries out real
When monitor and playback.
The main process of dynamic frame per second detection, dynamic when wherein A, B, C are preview when preview and playback are shown in Fig. 2
The process of frame per second detection decoding display, the process of dynamic frame per second detection decoding display when D, E, B, C are playback.
A, the code stream that receipts flow module 210 receives is sent in frame per second detection module 220, come with providing the video of frame per second detection
Source；
B, whether the current frame per second of the interpretation of frame per second detection module 220 changes, if changing, by the frame per second after change
Set in decoder (i.e. decoder module 230), ensure the video frame rate in decoder and be currently needed for the frame per second of decoding video
It is consistent；
C, the video data after decoding and interface data are sent to VGA/HDMI output displays together；
D, will receive in the code stream deposit code stream memory module 250 that flow module 210 receives, to check playback afterwards；
E, code stream is obtained from code stream memory module 250, is sent to frame per second detection module 220 and carries out frame per second judgement；
F, search for add module 260 and search command is sent to IPC by network, and IPC is added.
Frame per second is how many frame in one second video played.Frame is the base unit for forming video.Video file is in itself
Be made up of many continuous pictures, simply can be understood as frame per second be exactly under being recorded in one second picture number (actually this
For a little pictures by compression, what a frame data not necessarily preserved is a completion picture).
Key frame is also I frames, and it is the important frame in interframe compression coding, and the interval regulation of I frames influences whether that GOP grows
Degree, and then have influence on the speed for reading GOP, if I frame periods set it is excessive, may be by the occasion for having to use I frames
Compel to be replaced with B/P frames, that is, reduce image quality, I frames are the basic bases of interframe compression, such as a typical GOP
(IBP frames bag) structure is usually：IBBPBBPBBPBBPBBPBB, B are RELATED APPLICATIONS frames, i.e. the number with reference to the frame of front and back two
Draw the data of this frame according to the change plus this frame, P is forward reference frame, explanation reference B frames.
Interval can by detecting I frames realizes the detection to frame per second, that is, whether the code stream for judging to send occurs
Frame per second change, you can realize that dynamic frame per second detects.
The present invention also provides a kind of Network Personal Video Recorder 200, and with reference to shown in Fig. 2, it includes：
Flow module 210 is received, for receiving code stream；The code stream is that web camera gathers video and obtained after being encoded
Code stream；
Frame per second detection module 220, for carrying out frame per second detection to the code stream received, if detecting, frame per second changes,
Frame per second after record change；
Decoder module 230, it is used for and the code stream is decoded according to the frame per second after change；
Output module 240, shown for decoded video data transmitting to be delivered on display.
Further, described Network Personal Video Recorder 200 also includes：
Code stream memory module 250, for preserving the code stream received.
Add module 260 is searched for, after receiving addition instruction, searches for web camera 100, and add what is searched
Web camera 100.
Particular technique details on above-mentioned Network Personal Video Recorder has been described in detail in method above, therefore is repeated no more.
The present invention also provides a kind of video display system based on the detection of dynamic frame per second, as shown in figure 3, it includes connecting successively
Web camera 100, Network Personal Video Recorder 200 and the display screen 300 connect；
The web camera 100 gathers video data and encoded, then the code stream after coding is sent to network and recorded
Camera 200；
The Network Personal Video Recorder 200 carries out frame per second detection to the code stream received, if detecting, frame per second changes, record
Frame per second after change, and the code stream is decoded according to the frame per second after change；Then decoded video data is sent
To display 300；
The display 300 is shown to the video data received.
Further, the Network Personal Video Recorder 200 is connected to display 300 by VGA/HDMI interfaces.
Further, interchanger 400, the exchange are also associated between the web camera 100 and Network Personal Video Recorder 200
Machine 400 can receive the transmitted stream of multi-channel network video camera 100 and be transmitted to Network Personal Video Recorder 200.
Ins and outs on said system module have been described in detail in method above, therefore are repeated no more.
In summary, before the present invention decodes to the code stream that receives, frame per second is first detected, so when detecting that frame per second sends out
During changing, decoded according to the frame per second after change, so as to thoroughly solve the problems, such as that abnormal, interim card occurs in video, improved
The fluency of video playback.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (10)
1. a kind of image display method based on the detection of dynamic frame per second, it is characterised in that including step：
A, web camera gathers video data and encoded, then the code stream after coding is sent to Network Personal Video Recorder；
B, Network Personal Video Recorder carries out frame per second detection to the code stream received, if detecting, frame per second changes, after record change
Frame per second, and the code stream is decoded according to the frame per second after change；
C, decoded video data transmitting is delivered on display and shown.
2. preview and back method according to claim 1 based on the detection of dynamic frame per second, it is characterised in that the step
In B, after Network Personal Video Recorder receives code stream, the code stream is preserved.
3. the image display method according to claim 1 based on the detection of dynamic frame per second, it is characterised in that the step C
In, exported by VGA/HDMI interfaces to being shown on display.
4. the image display method according to claim 1 based on the detection of dynamic frame per second, it is characterised in that the step A
Specifically include：
A1, web camera collection video data are simultaneously encoded, and the code stream after coding is sent to interchanger；
Code stream after coding is forwarded to Network Personal Video Recorder by A2, interchanger.
5. the image display method according to claim 2 based on the detection of dynamic frame per second, it is characterised in that the step C
Also include afterwards：
After Network Personal Video Recorder receives play-back command, preserved code stream is read, and carries out frame per second detection, frame per second is sent out if detecting
Changing, the frame per second after record change, and the code stream is decoded according to the frame per second after change, it is then forwarded to display
On shown.
6. the image display method according to claim 1 based on the detection of dynamic frame per second, it is characterised in that the step C
Also include afterwards：
After Network Personal Video Recorder receives addition instruction, web camera is searched for, and add the web camera searched.
A kind of 7. Network Personal Video Recorder, it is characterised in that including：
Flow module is received, for receiving code stream；The code stream is the code stream that web camera gathers video and obtained after being encoded；
Frame per second detection module, for carrying out frame per second detection to the code stream received, if detecting, frame per second changes, record change
Frame per second afterwards；
Decoder module, it is used for and the code stream is decoded according to the frame per second after change；
Output module, shown for decoded video data transmitting to be delivered on display.
8. Network Personal Video Recorder according to claim 7, it is characterised in that also include：
Code stream memory module, for preserving the code stream received.
9. it is a kind of based on dynamic frame per second detection video display system, it is characterised in that including be sequentially connected web camera,
Network Personal Video Recorder and display screen；
The web camera gathers video data and encoded, then the code stream after coding is sent to Network Personal Video Recorder；
The Network Personal Video Recorder carries out frame per second detection to the code stream received, if detecting, frame per second changes, after record change
Frame per second, and the code stream is decoded according to the frame per second after change；Then decoded video data transmitting is delivered into display
Device；
The display is shown to the video data received.
10. the video display system according to claim 9 based on the detection of dynamic frame per second, it is characterised in that the network
Video recorder is connected to display by VGA/HDMI interfaces.
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| CN201710962860.7A CN107800989B (en) | 2017-10-16 | 2017-10-16 | Video display method and system based on dynamic frame rate detection and network video recorder |
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| CN201710962860.7A CN107800989B (en) | 2017-10-16 | 2017-10-16 | Video display method and system based on dynamic frame rate detection and network video recorder |
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| CN111312149A (en) * | 2020-03-10 | 2020-06-19 | Tcl华星光电技术有限公司 | Driving method and driving device |
| CN111312149B (en) * | 2020-03-10 | 2023-12-08 | Tcl华星光电技术有限公司 | Driving method and driving device |
| CN117459771A (en) * | 2023-12-26 | 2024-01-26 | 杭州睿盯科技有限公司 | Method and system for storing, previewing and replaying video of network camera |
| CN117459771B (en) * | 2023-12-26 | 2024-04-19 | 杭州睿盯科技有限公司 | Method and system for storing, previewing and replaying video of network camera |
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