CN106998475A - Video transmission path tracking and device - Google Patents
Video transmission path tracking and device Download PDFInfo
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- CN106998475A CN106998475A CN201710184739.6A CN201710184739A CN106998475A CN 106998475 A CN106998475 A CN 106998475A CN 201710184739 A CN201710184739 A CN 201710184739A CN 106998475 A CN106998475 A CN 106998475A
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- 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
- H04N19/46—Embedding additional information in the video signal during the compression process
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- 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
- H04N19/46—Embedding additional information in the video signal during the compression process
- H04N19/467—Embedding additional information in the video signal during the compression process characterised by the embedded information being invisible, e.g. watermarking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
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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
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
- H04N2005/91335—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a watermark
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- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
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Abstract
The present invention provides a kind of video transmission path tracking and device, and applied to each node in video monitoring system, methods described includes：As the node of encoding device, the corresponding nodal information of the encoding device is embedded in video；It is used as the node of the other equipment outside encoding device, nodal information in the video that receives is recovered, and the corresponding nodal information of present node is inserted into the nodal information of the recovery, new nodal information is generated, and the new nodal information is embedded in the video.Each node that the present invention is flowed through by video in whole monitoring system performs operation respectively, and all operations are recorded, and realizes the accurate traceable of transmission of video track, so as to improve the security of video, prevents malice from distorting.
Description
Technical field
The present invention relates to field of video monitoring, more particularly to a kind of video transmission path tracking and device.
Background technology
In video monitoring system, video image propagation path may include video image through Video coding formation code stream, code
Streaming, by code stream be stored as video recording, from memory space read video recording, video recording code stream decoding be rendered into display etc., for protect
Hinder the security of video image, prevent hacker attacks, code stream is stolen by unauthorized, code stream of recording a video illegally is distorted for video recording, depending on
The links that frequency image propagation path is passed through are required for being recorded, and realize the track record of transmission of video images, so that
So that video monitoring system at any time, the obtained video recording code stream of any link, can be obtained by inquiring about track record
The operator of code stream Jing Guo which link, each link etc. before the link.In addition, by track record, even if video recording code stream is most
Outflow video monitoring system, can also obtain the information such as operator of last link by inquiring about track record eventually, so that
Ensure the security of video image.For convenience of describing, video code flow and image are collectively referred to as video herein.
At present, conventional way is that the security of video is improved by tamper-resistance techniques, and this is in as evidence in video
Now it is particularly important when court.Specifically, it is embedded in video to need what is hidden when encoding device is encoded to video
Information (also referred to as watermark), judges whether the video is illegal subsequently through the presence or absence of embedded watermark of detection or integrality
Distort.However, the simple embedded watermark in the video of coding stage, simply records to encoding this link, does not remember
Other links (for example, storage, broadcasting etc.) are recorded, but safety can not ensure the security of whole monitoring system on a node.
The content of the invention
The present invention provides a kind of video transmission path tracking and device.
Specifically, the present invention is achieved through the following technical solutions：
According to the first aspect of the invention there is provided a kind of video transmission path tracking, applied to video monitoring system
In each node, it is characterised in that methods described includes：
As the node of encoding device, the corresponding nodal information of the encoding device is embedded in video；
As the node of the other equipment outside encoding device, the nodal information in the video that receives is recovered,
And the corresponding nodal information of present node is inserted into the nodal information of the recovery, generate new nodal information, and by institute
New nodal information is stated to be embedded in the video.
Alternatively, it is described that the new nodal information is embedded in the video, including：
The video last node through link the new nodal information is embedded in visible form it is described
In video, its corresponding new nodal information is embedded in the video by other nodes in hiding or visible form.
Alternatively, it is described the new nodal information is embedded in the video before, in addition to：
According to preset format, the new nodal information is encapsulated；
New nodal information after the encapsulation is converted into watermark；
Nodal information in the described pair of video that receives recovers, including：If the nodal information in the video is
The form of watermark, then recover to the watermark in the video that receives.
Alternatively, it is described that the corresponding nodal information of present node is inserted into the nodal information of the recovery, including：
Separator nodal information corresponding with the node is sequentially inserted on the head of the nodal information of the recovery.
Alternatively, after the new nodal information of the generation, in addition to：The new nodal information is encrypted；
Nodal information in the described pair of video that receives recovers, including：If the nodal information in the video is
Encrypted state, then be decrypted processing to the nodal information in the video.
According to the second aspect of the invention there is provided a kind of video transmission path tracks of device, applied to video monitoring system
In each node,
As the node of encoding device, described device includes：
Embedded module, video is embedded in by the corresponding nodal information of the encoding device；
As the node of the other equipment outside encoding device, described device includes：
Recovery module, recovers to the nodal information in the video that receives；
Module is inserted, the corresponding nodal information of present node is inserted into the nodal information that the recovery module is recovered,
The new nodal information of generation；
Embedded module, the new nodal information is embedded in the video.
Alternatively, the video last node through link insertion module by corresponding new nodal information with can
The form seen is embedded in the video, and the insertion modules of other nodes is by its corresponding new nodal information to hide or visible
Form be embedded in the video.
Alternatively, in addition to：
Package module, before the new nodal information is embedded in the video by the embedded module, according to default
Form, encapsulates the new nodal information；
Modular converter, in the package module according to preset format, is encapsulated after the new nodal information, by the encapsulation
New nodal information afterwards is converted into watermark；
If nodal information in the video is the form of watermark, the recovery module is also to the water in the video that receives
Print is recovered.
Alternatively, the head of nodal information that the insertion module is recovered in the recovery module be sequentially inserted into separator with
The corresponding nodal information of the node.
Alternatively, in addition to：
Encrypting module, after the insertion module generates new nodal information, the new nodal information is encrypted
Processing；
If the nodal information in the video is encrypted state, the recovery module is also to the nodal information in the video
Processing is decrypted.
Beneficial effects of the present invention：Each node flowed through by video in whole monitoring system performs operation respectively,
And all operations are recorded, the accurate traceable of transmission of video track is realized, so as to improve the security of video, is prevented
Malice is distorted.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
Can the limitation present invention.
Brief description of the drawings
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows the implementation for meeting the present invention
Example, and for explaining principle of the invention together with specification.
Fig. 1 is the networking schematic diagram of the monitoring system shown in an exemplary embodiment of the invention；
Fig. 2 is the flow chart of the video transmission path tracking shown in an exemplary embodiment of the invention；
Fig. 3 is the schematic diagram of the nodal information insertion video process shown in an exemplary embodiment of the invention；
Fig. 4 is the schematic diagram of the nodal information insertion video process shown in another exemplary embodiment of the present invention；
Fig. 5 is the schematic diagram of the nodal information insertion video process shown in further example embodiment of the present invention；
Fig. 6 is the schematic diagram of the watermark adition process shown in prior art；
Fig. 7 is the schematic diagram of the watermark adition process shown in an exemplary embodiment of the invention；
Fig. 8 is the schematic diagram of each node insertion nodal information process shown in an exemplary embodiment of the invention；
Fig. 9 is the nodal information concatenation schematic diagram shown in an exemplary embodiment of the invention；
Figure 10 is the schematic diagram of each node processing nodal information shown in an exemplary embodiment of the invention；
Figure 11 is the structural representation of the video transmission path tracks of device shown in an exemplary embodiment of the invention；
Figure 12 is the structural representation of the video transmission path tracks of device shown in another exemplary embodiment of the present invention；
Figure 13 is the structural representation of the video transmission path tracks of device shown in further example embodiment of the present invention.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects be described in detail in claims, the present invention.In addition, not conflicting
In the case of, the feature in following embodiments and embodiment can be mutually combined.
It is the purpose only merely for description specific embodiment in terminology used in the present invention, and is not intended to be limiting the present invention.
" one kind ", " described " and "the" of singulative used in the present invention and appended claims are also intended to including majority
Form, unless context clearly shows that other implications.It is also understood that term "and/or" used herein refers to and wrapped
It may be combined containing one or more associated any or all of project listed.
It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the present invention
A little information should not necessarily be limited by these terms.These terms are only used for same type of information being distinguished from each other out.For example, not departing from
In the case of the scope of the invention, the first information can also be referred to as the second information, similarly, and the second information can also be referred to as
One information.Depending on linguistic context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determining ".
Referring to Fig. 1, the networking schematic diagram of monitoring system provided in an embodiment of the present invention, the monitoring system may include management
Server, encoding device (such as IPC), storage device, decoding display device etc..Wherein, the management server is to described
Encoding device, storage device, decoding display device etc. are managed concentratedly, and it preserves the encoding device, storage device, decoding
The device id (identification, identity) of display device etc., user profile (such as user of each equipment of operation
Name) etc..
The monitoring system is presented to user by decoding display device by video, the user can by screen shot or
The mode of video recording obtains the video of the monitoring system and sent to the other equipment outside the monitoring system.
For convenience of describing, herein, by management server, encoding device, storage device, decoding display device and user
Abstract is node Node, and the abstract link between each node is path P ath.
In one embodiment, referring to Fig. 1, the storage device includes the first storage device and the second storage device, this reality
Apply in example, abstract management server is Node0, and abstract encoding device is Node1, and abstract the first storage device is Node2, second
Abstract storage device is Node3, and abstract decoding display device is Node5, and abstract user is Node6, node Nodei and Nodej
Between directed walk (flow direction of video between i.e. two nodes) be expressed as Pathij, wherein, i, j be respective nodes mark
Number, i >=0, j >=0, i ≠ j.
In the present embodiment, the link of transmission of video can include following several situations：
a：Node1->Node5->Node6, Node1 are after code stream or picture is encoded video into, directly by live stream
Send to Node5 and decoded, so as to for user's viewing.Link a includes path P ath15 and Path56.
b：Node1->Node2->Node5->Node6, Node1 are sent extremely after code stream or picture is encoded video into
Node2 is stored, then the video transferred by Node5 in Node2 is decoded, so that user watches.Link b includes path
Path12、Path25、Path56。
c：Node1->Node2->Node3->Node5->Node6, Node1 are encoding video into code stream or picture
Afterwards, send to Node2 and stored, due to life cycle management, video structural or set up the needs such as case storehouse, Node2
Need video being transferred in Node3, the video that Node5 is transferred in Node3 is decoded, so that user watches.Link c includes
Path P ath12, Path23, Path35, Path56.
For convenience of describing, video code flow and image are collectively referred to as video herein.
Referring to Fig. 2, a kind of video transmission path tracking provided in an embodiment of the present invention, applied to video monitoring system
In each node, methods described may include：
Step S101：As the node of encoding device, the corresponding nodal information of the encoding device is embedded in video.
Step S102：As the node of the other equipment outside encoding device, to the nodal information in the video that receives
Recovered, and the corresponding nodal information of present node is inserted into the nodal information of the recovery, generate new node letter
Breath, and the new nodal information is embedded in the video.In step s 102, original nodal information in the video
It is resumed, now, nodal information is not present in video, after new nodal information is embedded into, then comprising described in the video
New nodal information.
Each node that the present embodiment is flowed through by video in whole monitoring system performs operation respectively, and to all behaviour
As being recorded, and current node information is associated with the nodal information that all nodes before present node are embedded in video, from
And the accurate traceable of transmission of video track is realized, the security of video is improved, prevents malice from distorting.
In the present embodiment, each node is embedded in after its corresponding new nodal information to described video, is only included in video
Its corresponding nodal information covering can be embedded in upper one in video by the corresponding new nodal information of present node, i.e., each node
On the nodal information of node insertion.Also, each node is after its embedded corresponding new nodal information is into video,
Can be by transmission of video to next node.
In the present embodiment, the corresponding nodal information of each node (also referred to as info, wherein, the corresponding nodal informations of Node1 are
The corresponding nodal information of info1, Node2 be info2 ..., by that analogy) there may be difference, for example, each node can foundation
The type of the node sets nodal information.In fact, the node that nodal information is mainly passed through comprising video on directed walk
Corresponding nodal community, it is used to identifying video and have passed through the node, and contains operation information that the node implies (i.e.
Action type).Alternatively, the nodal information may include attribute information and action type, and the attribute information at least includes setting
Standby ID.
Alternatively, the corresponding nodal community of encoding device may include the information such as device id, nodename, position, time, compile
The corresponding action type of decoding apparatus may include the information such as Video coding, resolution ratio, frame per second.The corresponding nodal community of storage device can
The information such as be specifically identified including device id, storage location ID, storage location, may also include equipment manufacturers logo information,
The logo of video monitoring system network operator operates username information of user etc., and the corresponding action type of storage device can be wrapped
Include video recording storage.The corresponding nodal community of decoding display device may include device id, operation user name, operating time, equipment
Hardware or software information etc..
In the present embodiment, nodal information can in the form of text, pattern form or binary coded form etc. be presented.
In one embodiment, the nodal information corresponding to encoding device, storage device and decoding display device is text
Form.
Wherein, encoding device is video camera, and the video camera is arranged on area B roads C roads intersection, the manufacturer of video camera
Logo texts are " D companies ".The nodal information of video camera can be rendered as：A areas B roads C roads intersection (location expression)+003
(device id)+IP address+resolution ratio+frame per second+encoder type (H.264HP/H.265MP/JPEG)+time.Alternatively, image
The nodal community of machine is：" A areas B roads C roads intersection "+" 003 "+" 192.168.0.135 "+" 1920x1080 "+" 25 "+
“H.264HP”+“2017.02.15.13:25:26 ", it is encoded to：
0XC287BDBBB2E6C2B7BFDA+0X0D0A+
0X003+0X0D0A+
0X3136382E302E313335+0X0D0A+
0X313932307831303830+0X0D0A+
0X3235+0X0D0A+
0X482E3236344850+0X0D0A+
0X353A323630+0X0D0A
The action type of video camera is：" Video coding ", is encoded to：
0XCAD3C6B5B1E0C2EB20+0X0D0A
The nodal community of storage device can be rendered as：" storage rack 01 "+" memory block 05 "+" IP address ".It is optional
Ground, the attribute information of node 2 is：" storage rack 01 "+" storage deblocking 05 "+" 192.168.0.126 ".It is encoded to：
0XB4E6B4A2BBFAB9F1303120+0X0D0A
0XB4E6B4A2C8A5BFE9303520+0X0D0A
0X3139322E3136382E302E31323620+0X0D0A
The action type of node 2 is：" video recording storage ", is encoded to：
0XC2BCCFF1B4E6B4B4A220+0X0D0A
The corresponding nodal community of decoding display device can be rendered as：Live stream link setup time or storage code stream are read
Take time+" Zhang San " (live stream link is set up or storage stream reads user name)+device name and type (NVR models/decoding
PC hardware informations software information).Alternatively, the node attribute information of decoding display device is：" Zhang San "+" M corporate clients end
v.200”+“Dell”+“IntelCorei7-4790”+“Win764Bit”+“192.168.0.124”+“2017.02.23.09:
16:23 ", it is encoded to：
0XD5C5C8FD20+0X0D0A+
0X756E6976696577BFCDBBA7B6CB76322E303020+0X0D0A+
0X44656C6C20+0X0D0A+
0X496E74656C436F726569372D34372D3437393020+0X0D0A+
0X57696E37363442697420+0X0D0A+
0X3139322E3136382E302E31323420+0X0DD0A+
0X323031372E30322E32332E30393A3131363A323320+0X0DD0A
The action type of node is：" decoding is rendered ", is encoded to：
0XBDE2C2EBE4D6C8BE20+0X0D0A
It should be noted that because the nodal community of each node and the byte length of action type are usually different, institute
With needed between the nodal information of two nodes insert separator, for example due to the nodal community of a certain node potentially include it is many
Individual property value, and action type potentially includes multiple operation informations, to distinguish multiple property values of nodal community, action type
Multiple operation informations, can insert one 0X0D0A of insertion between a 0X0D0A, two operation informations between two property values,
Thus, to further discriminate between nodal information between two nodes, two can be inserted between the nodal information of two nodes
0X0D0A, i.e. " 0X0D0A0D0A ", to distinguish over the segmentation inside nodal community and action type, so as to significantly more distinguish
The corresponding nodal information of two nodes.
In the present embodiment, each node embedded new nodal information in video image can be hiding form insertion,
Can be embedded in visible form.Alternatively, the insertion new nodal information is into the video, including：It is described
Video last node through link its corresponding new nodal information is embedded in the video in visible form, its
Corresponding new nodal information is embedded in the video node by he in hiding or visible form.This is due to decoding display
When, the nodal informations of all insertions is embedded into alpha passages in visible form, this display mode is similar in pdf
Embedded visible watermark in document.Because visible form shows the embedded node letter of all accumulations over the display
Breath, so viewing user have directly perceived the complete path information of the display video and nodal information (including each section of each node
Operation user profile of point etc.).Such as in Fig. 1, even if the video shown by the decoding display device is again by user (Node6)
Record screen resurveys into encoding video pictures, and complete path information before is all embedded in source in the form of visible watermark and regarded
Frequency image (the decoding and reconstituting video image in node Node5).
Wherein, embedded mode includes but is not limited to：
H.264 or H.265 (1) video is encoded in the form of, then use " unspecified " type (referring to
The ITU-T H.264 Table7-1 or ITU-T H.265 (04/2015) of (02/2014) Table7-1) NAL unit it is (each
NAL unit is the variable length byte character string of certain syntactic element, including the header comprising a byte (is used for representing
Data type), and some integer bytes load data；One NAL unit can carry a coded slice, A/B/C type numbers
According to segmentation or a sequence or picture parameter set) carry nodal information.
(2) video is with JPEG form coding, then using APPn sections of (data blocks, referring to ISO/IEC 10918-1:1993
(E) TableB.1) carry nodal information.When video encapsulation is that MPEG-2TS/PS carries out network transmission or video recording storage,
Can also be with the PES of " User Private (referring to the Table 2-34 of ISO/IEC 13818-1/ITU-T H.222.0) " (i.e.
The elementary stream of packing) carry.
H.264 or H.265 however, no matter video is encoded in the form of, or encoded using JPEG form,
In the present embodiment, nodal information in the form of watermark to be embedded in video.Certainly, if JPEG, H.264, H.265 include standard
Syntactic element and compression algorithm, can not be to be embedded in nodal information in the form of watermark into video.
In the present embodiment, its corresponding new nodal information is embedded in institute by each node after new nodal information is generated
Before stating in video, in addition it is also necessary to the new nodal information is encapsulated according to the first preset format.
In one embodiment, the nodal information is embedded in MPEG-2TS/PS in PES forms, referring to Fig. 3, with two nodes
Exemplified by (being referred to as first node, Section Point).First, video uses JPEG/H.264/H.265 coding generation source code flows
ES (i.e. elementary stream), PES is encapsulated as according to MPEG-2TS/PS consensus standards.Then, first node is the corresponding section of the node
Point information is encapsulated as " User Private " types PESinfo1 according to the first preset format.In Section Point, first to preceding
All nodes (in Fig. 3 only have first node) accumulation in face " User Private " types PES are according to the first preset format solution
The corresponding nodal information of Section Point, is then added in above all nodal informations progress accumulation extension by analysis, according still further to the
One preset format is re-packaged into " User Private " types PESinfo12.It should be noted that in the present embodiment, no matter
It is first node, or in Section Point, when " after User Private " types PES encapsulation is finished, finishing encapsulation
PES is attached in video, according still further to MPEG-2 TS/PS agreements (wherein, the English full name of TS：TransportStream, Chinese is complete
Claim：Transmitting stream；PS English full name：ProgramStream, Chinese full name：Program stream), it is TS/PS by video encapsulation.
In another embodiment, with the NALU of " unspecified " type, (it includes NAL and figure to the nodal information
As parameter set RBSP) during H.264/H.265 form be embedded into, or with APPn insertions JPEG.Referring to Fig. 4, with two nodes
Exemplified by (being referred to as first node, Section Point).In first node, by its corresponding nodal information according to the first preset format
The NALUinfo1 of " unspecified " type is encapsulated as, then the NALU is attached in the NALU streams for carrying video.Second
Node, is first according to the first preset format to its all node (there was only first node in Fig. 4) accumulation previous
" unspecified " type NALU is parsed, then the corresponding nodal information of Section Point it is cumulative on, it is pre- according still further to first
If form Reseals into the NALU that type is " unspecified ", finally the NALU Resealed is attached to and carries video
In NALU streams.
Although it should also be noted that, NALU types H.264 and H.265 are all " unspecified " and all using the
One preset format is packaged, i.e., H.264 identical with payload H.265, but according to the H.264 and H.265 NALU heads of agreement
H.264 and the H.265 differentiation of the video of protocol code portion is different, so as to can realize to based on.
Alternatively, each node is encapsulated after the new nodal information according to the first preset format, in addition it is also necessary to by the encapsulation
New nodal information afterwards is converted into watermark.Also, each node carries out recovery to the nodal information in the video that receives to be included：
If nodal information in the video is the form of watermark, the watermark in the video that receives is recovered.
In one embodiment, nodal information is embedded in JPEG or NALU H.264/H.265 in the form of invisible watermark
When, such as Fig. 5 is by taking the first two node as an example.In first node, nodal information according to the second preset format formation watermark text or
After binary system watermark recovery, it is embedded into the NALU or JPEG that carry video.In Section Point, the second default lattice are first according to
Formula is in the NALU or JPEG for carrying video, to the nodal information of all nodes (being here first node) accumulation before it
Recovered, i.e., the watermark that Section Point is generated to first node recovers, then the corresponding node of Section Point is believed
On breath is cumulative, and watermark text or binary system watermark recovery are re-formed, be then embedded in again according still further to the second preset format
Into the NALU or JPEG that carry video image.In the present embodiment, although the accumulation for being related to watermark content updates, but water
Print embedded mobile GIS (also referred to as watermark transcoding), which does not have, to change, i.e. the watermark position of embedded block and embedding grammar in the picture
Do not change.It should be noted that the first preset format and the second preset format can for each nodal information distributing order or
Separator content inserted between each nodal information etc..
Referring to Fig. 6, it is traditional using in the form of watermark insert nodal information to video process as：First, by the section being inserted into
Point information is converted into binary system picture, and line translation is then entered to the binary system picture, obtains the binary system picture of deformation, again will
Each pixel value (0 or 1) of the binary system picture of the deformation of reading is inserted into video according to watermarking algorithm.
Referring to Fig. 7, the present embodiment and the difference of conventional watermark inserted mode are：The intermediate node of transmission of video link
It is not simple watermark extracting.Specifically, watermark of each intermediate node first to its all node formation previous is extracted, so
The inverse process inserted afterwards according to watermark into the nodal information of all nodes before present node, connects the watermark recovery extracted
, current node information is being inserted into the head of all nodal informations recovered, to form new nodal information, according still further to
Nodal information is inserted video by traditional watermark insertion process with watermark form.As can be seen here, traditional watermark insertion and watermark
Extraction is separation, and in the present embodiment, each node need to enter after extension after watermark is extracted to all nodal informations before
Watermark insertion is carried out again.
Video in video monitoring system records each node of video process in video along each link transmission
The mode of corresponding nodal information, is also referred to as video monitoring " trace logs record ".However, different from the day of journal file
The difference of nodal information record form in will form, the present embodiment is：The nodal information record first passed through rear, by
The nodal information crossed is recorded preceding.
With reference to Fig. 8 and Fig. 9, in one embodiment, the link of transmission of video is Node1->Node2->Node3->……->
NodeN.Video is after Node1 is sent, and the corresponding nodal informations of Node1 can be recorded in video；Transmission of video is arrived
Node2, Node2 can insert its corresponding nodal information after the corresponding nodal informations of Node1 embedded in parsing video
To the head of the corresponding nodal informations of Node1；All nodes that transmission of video is embedded in Node3, Node3 in video is parsed
After the nodal information of (it includes Node1 and Node2), its corresponding nodal information can be inserted into obtained nodal information head
Portion；The like, video reaches last node NodeN, NodeN all nodes embedded in video is parsed, and (it is wrapped
Include Node1, Node2 ... NodeN-1) nodal information after, its corresponding nodal information can be inserted into obtained node
The head of information.
In the present embodiment, video constantly advances along oriented transmission path, and embedded nodal information constantly recovers and again
It is embedded, while embedded information constantly updates extension due to constantly accumulating.Referring to figure, video is oriented by N number of node
Path P ath12->Path23->....->PathN-1N, the nodal information that embedded each node is accumulated successively is Info1,
Info2 ..., Infoi ..., InfoN.
In one embodiment, nodal information is inserted using PES, NALU or APPn form, because the node of each node is believed
Byte length in breath is usually different, for the ease of distinguishing, is used between the nodal information of two nodes
" 0X0D0A0D0A " separator, i.e., in some node, extend currently before the node in the head of the nodal information of all nodes
During the nodal information of node, the nodal information of separator and the node, user's all sections in video is extracted can be sequentially inserted into
During point information, all nodal informations can be extracted backward, one by one according to separator successively from last node.I.e. each node is inserted
Entering the corresponding nodal information of the node this process into the nodal information of the recovery may include：Believe in the node of the recovery
The head of breath is sequentially inserted into separator nodal information corresponding with the node.
It is each why the present embodiment is concatenated in the form of inverted order (order opposite with the order that video flows through each node)
The nodal information of individual node, can fast, accurately judge that video flows through the order of each node, simultaneously because being inserted in some node
When entering current node information, it is possible to it is to be understood that the nodal information corresponding to node closer to the distance, can use the form of inverted order
The head for concatenating the nodal information that the nodal information of each node conveniently and efficiently can analytically go out starts, and searches backward successively
Separator, the corresponding nodal information of parsing one by one each node of distance from the close-by examples to those far off.
It is of course also possible to the corresponding section of afterbody insertion present node of all nodal informations parsed in present node
Point information.Although the nodal information amount corresponding to different nodes may be different, during watermark is inserted, binary system
The size of picture can be with constant, and the binary system dimension of picture of deformation is also constant, so the watermark information total amount in embedded video is not
Become, but the inner capacities of binary system picture can become more to enrich and complicated.
It is further to improve after security, the new nodal information of the acquisition referring to Figure 10, in addition to：To described new
Nodal information is encrypted.Also, the nodal information in the described pair of video received, which carries out recovery, to be included：If described regard
Nodal information in frequency is encrypted state, then processing is decrypted to the nodal information in the video.
In one embodiment, before nodal information is embedded in into video, the new nodal information that each node can be obtained to it
It is encrypted in the form of asymmetric encryption.Alternatively, each node uses public key to all nodes before the node first
Nodal information be decrypted, then current node information is sealed in the head of the nodal information parsed to the node, then
The nodal information that it is obtained is encrypted using private key.It should be noted that in the present embodiment, the processing of encryption or decryption
The not all node of step is performed both by, in other words each node be encrypted, decryption processing the step of can be independent progress.
Embodiment with aforementioned video transmission path tracking is corresponding, and the embodiment of the present invention additionally provides a kind of video
The embodiment of transmission path tracks of device.
Referring to Figure 11, the video transmission path tracks of device is applied to each node in monitoring system, wherein, it is used as volume
The node of decoding apparatus, described device may include to be embedded in module 300, for being embedded in the corresponding nodal information of the encoding device to regarding
Frequently；As the node of the other equipment outside encoding device, described device may include recovery module 100, insert module 200 and embedding
Enter module 300.Nodal information in the video that 100 pairs of the recovery module is received recovers；The insertion module 200 is used
In the corresponding nodal information of present node will be inserted into the nodal information that the recovery module 100 is recovered, new section is generated
Point information；The embedded module 300 is used to the new nodal information being embedded in the video.
In the present embodiment, the nodal information includes attribute information and action type, and the attribute information at least includes setting
Standby ID.Wherein, the nodal community have passed through the node for identifying video, and the action type indicates the operation of the node
Information.
Further, the video the insertion module 300 of last node through link corresponding new node is believed
Breath is embedded in the video in visible form, so that user is capable of the fullpath of video described in visual perception
Information；The insertion module 300 of other nodes (video any node) before last node through link will correspondence
New nodal information to hide or visible form is embedded in the video, new nodal information is embedded in the form of hiding
Into video, so as to prevent the illegal acquisition of nodal information.
Further, the head for the nodal information that the insertion module 200 is recovered in the recovery module 100 is sequentially inserted into
Separator nodal information corresponding with the node.Due to when some node inserts current node information, it is possible to it is to be understood that away from
From the nodal information corresponding to nearer node, the head for the nodal information that can analytically go out starts, and searches divide backward successively
Every symbol, the corresponding nodal information of parsing one by one each node of distance from the close-by examples to those far off.
Referring to Figure 12, to prevent from illegally distorting video information, security of system, the video transmission path tracking dress are improved
Put and may also include package module 400 and modular converter 500.
The package module 400 is used to be embedded in the new nodal information into the video in the embedded module 300
Before, according to preset format, encapsulate the new nodal information.
The modular converter 500 is used in the package module 400 according to preset format, encapsulates the new nodal information
Afterwards, the new nodal information after the encapsulation is converted into watermark.
If the nodal information in the video is the form of watermark, the recovery module 100 is also needed in the video
Watermark is recovered.
It is further to prevent from illegally distorting video information referring to Figure 13, improves security, the video transmission path tracking
Device may also include encrypting module 600.
The encrypting module 600 is used for after the insertion module 200 obtains new nodal information, to the new node
Information is encrypted.
If the nodal information in the video is encrypted state, the recovery module 100 is also needed to the section in the video
Processing is decrypted in point information, and the insertion module 200 can be by corresponding nodal information (the place node of insertion module 200
Corresponding nodal information) seal in the heads of all nodal informations recovered to the recovery module 100.
Alternatively, the encrypting module 600 is after the insertion module 200, before package module 400.
It should also be noted that, in some instances, all nodes include the encrypting module 600, so as to improve whole
The security of individual system.In some other example, only part of nodes includes the encrypting module 600.
The function of unit and the implementation process of effect specifically refer to correspondence step in the above method in said apparatus
Implementation process, will not be repeated here.
For device embodiment, because it corresponds essentially to embodiment of the method, so related part is real referring to method
Apply the part explanation of example.Device embodiment described above is only schematical, wherein described be used as separating component
The unit of explanation can be or may not be physically separate, and the part shown as unit can be or can also
It is not physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Can be according to reality
Selection some or all of module therein is needed to realize the purpose of the present invention program.Those of ordinary skill in the art are not paying
In the case of going out creative work, you can to understand and implement.
The present invention video transmission path tracking and device by video flowed through in whole monitoring system it is each
Node performs operation respectively, and all operations are recorded, and the accurate traceable of transmission of video track is realized, so as to improve
The security of video, prevents malice from distorting.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (10)
1. a kind of video transmission path tracking, applied to each node in video monitoring system, it is characterised in that the side
Method includes：
As the node of encoding device, the corresponding nodal information of the encoding device is embedded in video；
As the node of the other equipment outside encoding device, the nodal information in the video that receives is recovered, and will
The corresponding nodal information of present node is inserted into the nodal information of the recovery, generates new nodal information, and will be described new
Nodal information be embedded in the video.
2. video transmission path tracking as claimed in claim 1, it is characterised in that described by the new nodal information
It is embedded in the video, including：
The video last node through link the new nodal information is embedded in the video in visible form
In, its corresponding new nodal information is embedded in the video by other nodes in hiding or visible form.
3. video transmission path tracking as claimed in claim 1, it is characterised in that described by the new nodal information
Before being embedded in the video, in addition to：
According to preset format, the new nodal information is encapsulated；
New nodal information after the encapsulation is converted into watermark；
Nodal information in the described pair of video that receives recovers, including：If the nodal information in the video is watermark
Form, then the watermark in the video that receives is recovered.
4. video transmission path tracking as claimed in claim 1, it is characterised in that described by the corresponding section of present node
Point information is inserted into the nodal information of the recovery, including：
Separator nodal information corresponding with the node is sequentially inserted on the head of the nodal information of the recovery.
5. video transmission path tracking as claimed in claim 1, it is characterised in that the new nodal information of the generation
Afterwards, in addition to：The new nodal information is encrypted；
Nodal information in the described pair of video that receives recovers, including：If the nodal information in the video is encryption
State, then be decrypted processing to the nodal information in the video.
6. a kind of video transmission path tracks of device, applied to each node in video monitoring system, it is characterised in that
As the node of encoding device, described device includes：
Embedded module, video is embedded in by the corresponding nodal information of the encoding device；
As the node of the other equipment outside encoding device, described device includes：
Recovery module, recovers to the nodal information in the video that receives；
Module is inserted, the corresponding nodal information of present node is inserted into the nodal information that the recovery module is recovered, generation
New nodal information；
Embedded module, the new nodal information is embedded in the video.
7. video transmission path tracks of device as claimed in claim 6, it is characterised in that the video through the last of link
Corresponding new nodal information is embedded in the video by the insertion module of one node in visible form, other nodes it is embedding
Enter module to be embedded in its corresponding new nodal information in the video in hiding or visible form.
8. video transmission path tracks of device as claimed in claim 6, it is characterised in that also include：
Package module, before the new nodal information is embedded in the video by the embedded module, according to preset format,
Encapsulate the new nodal information；
Modular converter, in the package module according to preset format, is encapsulated after the new nodal information, after the encapsulation
New nodal information is converted into watermark；
If nodal information in the video is the form of watermark, the recovery module is also entered to the watermark in the video that receives
Row recovers.
9. video transmission path tracks of device as claimed in claim 6, it is characterised in that the insertion module is recovered described
The head of the nodal information of module recovery is sequentially inserted into separator nodal information corresponding with the node.
10. video transmission path tracks of device as claimed in claim 6, it is characterised in that also include：
Encrypting module, after the insertion module generates new nodal information, the new nodal information is encrypted；
If the nodal information in the video is encrypted state, the recovery module is also carried out to the nodal information in the video
Decryption processing.
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