CN107979765A - A kind of video data handling procedure, apparatus and system - Google Patents
A kind of video data handling procedure, apparatus and system Download PDFInfo
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- CN107979765A CN107979765A CN201610939838.6A CN201610939838A CN107979765A CN 107979765 A CN107979765 A CN 107979765A CN 201610939838 A CN201610939838 A CN 201610939838A CN 107979765 A CN107979765 A CN 107979765A
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- video data
- check code
- sequence number
- verification
- data packet
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000012795 verification Methods 0.000 claims abstract description 39
- 238000012545 processing Methods 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000012937 correction Methods 0.000 claims description 5
- 230000002441 reversible effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 12
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving video stream encryption
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Databases & Information Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
An embodiment of the present invention provides a kind of video data handling procedure, apparatus and system, wherein, this method includes：Receive video data；The sequence number of the corresponding check code of video data and the corresponding video data packet of the check code is obtained, wherein, which is generated by the video data packet in the video data；The video data is verified according to the check code and the sequence number；In the case where verification passes through, the video data is played.By the above method, receiving terminal can verify data stream by check code, and only in the case of verification successfully, receiving terminal can just play corresponding video, so as to effectively prevent data flow to be tampered.
Description
Technical field
The present invention relates to the communications field, the more particularly to processing method of video data, apparatus and system.
Background technology
Existing IPTV networks are all much to transmit video data stream using plaintext, with network attack means increasingly
More, plaintext transmission data are easy to distort by data flow, so that cause user's viewing is not original data stream, and are possible to
It is some illegal videos.
At present, it is main to prevent data flow from distorting using being encrypted to data stream.But existing traffic encryption mode
There are following defect：First, existing encryption method is primarily used to copyright protection, and terminal will not be right after receiving data flow
Data flow is verified, therefore hacker still can distort data stream without being found by terminal；Second, existing encryption
System expensive, so as to cause the increase of operator's cost.
The content of the invention
To solve the above problems, the embodiment of the present invention proposes a kind of processing method of video data, apparatus and system.With
Solve existing encryption method expensive and terminal does not verify data stream, so as to can not prevent what data flow from distorting to ask
Topic.
Specific implementation of embodiment of the present invention step is as follows：
A kind of video data handling procedure, including：
Receive video data；
The sequence number of the corresponding check code of video data and the corresponding video data packet of the check code is obtained, wherein, institute
Check code is stated to be generated by the video data packet in the video data；
The video data is verified according to the check code and the sequence number；
In the case where verification passes through, the video data is played.
Further, it is described verification is carried out to the video data according to the check code and the sequence number to include：
The corresponding video data packet of the sequence number is obtained from the video data；Using the video data packet as key,
It is encrypted according to algorithm set in advance, to generate corresponding verification data, wherein, the algorithm set in advance and described
The generating algorithm of check code is consistent；It is whether consistent with the verification data to compare the check code.
Further, the algorithm set in advance is non-reversible algorithm, wherein, the non-reversible algorithm is calculated including MD5
Method.
Further, the corresponding check code of video data and the corresponding video data packet of the check code of obtaining
Sequence number includes：
Parsing obtains the check code and the sequence number in the video data sent from transmitting terminal；Or
The check code and the sequence number that third-party server is sent are received, wherein, the third-party server is used
In obtaining the video data packet from the transmitting terminal, to generate the check code.
Further, the method further includes：In verification not in the case of, the video data is abandoned.
The embodiment of the present invention additionally provides a kind of video data processing apparatus, including：
Receiving module, for receiving video data；
Acquisition module, for obtaining the corresponding check code of video data and the corresponding video data packet of the check code
Sequence number, wherein, the check code is generated by the video data packet in the video data；
Correction verification module, for being verified according to the check code and the sequence number to the video data；
Playing module, in the case of passing through in verification, plays the video data.
Further, the correction verification module includes：
Acquisition submodule, for obtaining the corresponding video data packet of the sequence number from the video data；Generate submodule
Block, for using the video data packet as key, being encrypted according to algorithm set in advance, to generate corresponding check number
According to, wherein, the algorithm set in advance is consistent with the generating algorithm of the check code；Comparison sub-module, for described in comparison
Whether check code is consistent with the verification data.
Further, the acquisition module includes：
Analyzing sub-module, the check code and the sequence are obtained for being parsed from the video data that transmitting terminal is sent
Number；Alternatively,
Receiving submodule, for the check code for receiving third-party server transmission and the sequence number, wherein, it is described
Third-party server is used to obtain the video data packet from the transmitting terminal to generate the check code.
Further, described device further includes：Discard module, for not in the case of, being regarded in verification described in discarding
Frequency evidence.
The embodiment of the present invention additionally provides a kind of video data processing system, including transmitting terminal and receiving terminal, wherein, institute
Transmitting terminal is stated, for sending video data；
The receiving terminal, for receiving the video data；Obtain the corresponding check code of the video data and described
The sequence number of the corresponding video data packet of check code, wherein, the check code is by the video data packet in the video data
Generation；The video data is verified according to the check code and the sequence number；In the case where verification passes through, play
The video data.
By the above method, receiving terminal can verify data stream by check code, only verify successful feelings
Under condition, receiving terminal can just play corresponding video, so as to effectively prevent data flow to be tampered.
Brief description of the drawings
Fig. 1 is a kind of video data handling procedure flow chart provided in an embodiment of the present invention；
Fig. 2 is a kind of video data processing apparatus block diagram one provided in an embodiment of the present invention；
Fig. 3 is a kind of video data processing apparatus block diagram two provided in an embodiment of the present invention；
Fig. 4 is a kind of video data processing apparatus block diagram three provided in an embodiment of the present invention；
Fig. 5 is a kind of video data processing apparatus block diagram four provided in an embodiment of the present invention；
Fig. 6 is a kind of video data processing system block diagram provided in an embodiment of the present invention；
Fig. 7 is a kind of video data handling procedure flow chart that the embodiment of the present invention one provides；
Fig. 8 is a kind of video data processing system block diagram that the embodiment of the present invention one provides；
Fig. 9 is a kind of video data handling procedure flow chart provided by Embodiment 2 of the present invention.
Embodiment
Below by drawings and examples, technical scheme is described in further detail.
An embodiment of the present invention provides a kind of video data handling procedure, Fig. 1 is that one kind provided in an embodiment of the present invention regards
Frequency is according to process flow figure, as shown in Figure 1, this method comprises the following steps：
Step S102：Receive video data；
Step S104：Obtain the sequence of the corresponding check code of the video data and the corresponding video data packet of the check code
Number, wherein, which is generated by the video data packet in the video data；
Step S106：The video data is verified according to the check code and the sequence number；
Step S108：In the case where verification passes through, the video data is played.
Critical data frame I frames in video data packet preferred video data flow in above-mentioned steps.By above-mentioned steps, connect
Receiving end will not directly play out video when receiving video data, but video data is verified first, to judge
Whether video data is tampered.
Further, this carries out verification according to the check code and the sequence number to the video data includes：From the video counts
According to the corresponding video data packet of middle acquisition sequence number；Using the video data packet as key, added according to algorithm set in advance
It is close, to generate corresponding verification data, wherein, the algorithm set in advance is consistent with the generating algorithm of the check code；Compare this
Whether check code is consistent with the verification data.
Wherein, which is non-reversible algorithm, for example, MD5 algorithms.
It is consistent in check code generating algorithm and for non-reversible algorithm in the case of, it is ensured that in the case that verification passes through,
Video data stream is reliable.
Further, the sequence number of the corresponding check code of acquisition video data and the corresponding video data packet of the check code
Including：Parsing obtains the check code and the sequence number in the video data sent from transmitting terminal；Or receive third-party server
The check code sent and the sequence number, wherein, which is used to obtain the video data packet from the transmitting terminal,
To generate the check code.
Above two method is the two ways of check code generation and transmission.Under first way, check code is by transmitting terminal
Equipment generates, and as video data transmits together, implementation is relatively easy with transmission mode；Under the second way, verification
Code is generated by third party device, and transmission channel needs third-party ginseng also different from the passage of transmission of video, reliability higher
With.
Further, this method further includes：In verification not in the case of, the video data is abandoned.
The embodiment of the present invention additionally provides a kind of video data processing apparatus, and Fig. 2 is one kind provided in an embodiment of the present invention
Video data processing apparatus block diagram one, as shown in Fig. 2, the device is included with lower module：
Receiving module 22, for receiving video data；
Acquisition module 24, for obtaining the corresponding check code of the video data and the corresponding video data packet of the check code
Sequence number, wherein, the check code by the video data the video data packet generate；
Correction verification module 26, for being verified according to the check code and the sequence number to the video data；
Playing module 28, in the case of passing through in verification, plays the video data.
Further, Fig. 3 is a kind of video data processing apparatus block diagram two provided in an embodiment of the present invention, as shown in figure 3,
The calibration equipment 26 is included with lower module：
Acquisition submodule 32, for obtaining the corresponding video data packet of the sequence number from the video data；
Submodule 34 is generated, for using the video data packet as key, being encrypted according to algorithm set in advance, with life
Into corresponding verification data, wherein, the algorithm set in advance is consistent with the generating algorithm of the check code；
Comparison sub-module 36, it is whether consistent with the verification data for comparing the check code.
Further, Fig. 4 is a kind of video data processing apparatus block diagram three provided in an embodiment of the present invention, as shown in figure 4,
The acquisition module 24 is included with lower module：
Analyzing sub-module 42, the check code and the sequence number are obtained for being parsed from the video data that transmitting terminal is sent；
Alternatively,
Receiving submodule 44, for receiving the check code and the sequence number of third-party server transmission, wherein, the 3rd
Square server is used to obtain the video data packet from the transmitting terminal to generate the check code.
Further, Fig. 5 is a kind of video data processing apparatus block diagram four provided in an embodiment of the present invention, as shown in figure 5,
The device is further included with lower module：
Discard module 52, for not in the case of, abandoning the video data in verification.
The embodiment of the present invention additionally provides a kind of video data processing system, and Fig. 6 is one kind provided in an embodiment of the present invention
Video data processing system block diagram, as shown in fig. 6, the system includes transmitting terminal 62 and receiving terminal 64, wherein,
The transmitting terminal 62, for sending video data；
The receiving terminal 64, for receiving the video data；Obtain the corresponding check code of the video data and the check code
The sequence number of corresponding video data packet, wherein, which is generated by the video data packet in the video data；According to the school
Test code and the sequence number verifies the video data；In the case where verification passes through, the video data is played.
Embodiment one
The embodiment of the present invention one additionally provides a kind of video data processing system.
Fig. 7 is a kind of video data handling procedure flow chart that the embodiment of the present invention one provides, as shown in fig. 7, this method
Comprise the following steps：
Step S702：A third-party server is affixed one's name in transmitting terminal content distribution network CDN service device sidepiece.The third party
Server is used to extracting the key frame I frame data of code stream, and generates check code according to checking algorithm, and by check code with it is corresponding
Data packet sequence number issues receiving terminal Interactive Internet TV IPTV terminal together；
Step S704：It is by third party's service that IPTV terminal, which receives video flowing, check code and data packet sequence number, check code,
The link that device is different from media code stream using another is sent；
Step S706：IPTV terminal receives video flowing with after check code, being looked for according to the corresponding network bag sequence number of check code
Media bag into video flowing, then obtains check code by checking algorithm, uses the check code and the check code of receiving of generation
It is compared.
Step S708：If can match, illustrating not distort, then this video data is sent to decoder plays, if
It cannot match, then abandon the data.
Fig. 8 is a kind of video data processing system block diagram that the embodiment of the present invention one provides, as shown in figure 8, the system bag
Include：
CDN server 82, for sending video data；
Third-party server 84, check code is generated for extracting the key frame I frame data of code stream, and according to checking algorithm,
And check code is issued into receiving terminal Interactive Internet TV IPTV terminal together with corresponding data packet sequence number；
IPTV terminal 86, for receiving video flowing, check code according to data packet sequence number, according to the corresponding network bag of check code
Sequence number finds the media bag in video flowing, then obtains check code by checking algorithm, uses check code and the receiving of generation
Check code is compared.
Embodiment two
The embodiment of the present invention two additionally provides a kind of video data handling procedure.Fig. 9 is provided by Embodiment 2 of the present invention
A kind of video data handling procedure flow chart, as shown in figure 9, this method comprises the following steps：
Step S902：Transmitting terminal content distributing network CDN identifies I frame data bags, and generates check code using checking algorithm,
Then check code is inserted into original code stream and is sent to IPTV terminal；
Step S904：IPTV terminal receives video flowing, check code and data packet sequence number；
Check code is inserted into original code stream and sends, for example is placed in rtp extension header, or is inserted into an empty matchmaker
In body bag, parsed according to the specification being inserted into server.
Step S906：After IPTV terminal parses check code from code stream, looked for according to the corresponding network bag sequence number of check code
Media bag into video flowing, then obtains check code by checking algorithm, uses the check code and the check code of receiving of generation
It is compared；
Step S908：If can match, illustrating not distort, then this video data is sent to decoder plays, if
It cannot match, then abandon the data.
If IPTV terminal detects I frame data, but MD5 check codes corresponding with this I frame data, terminal are not received
This media bag data is also considered as to be tampered.
Claims (10)
- A kind of 1. video data handling procedure, it is characterised in that including：Receive video data；The sequence number of the corresponding check code of the video data and the corresponding video data packet of the check code is obtained, wherein, institute Check code is stated to be generated by the video data packet in the video data；The video data is verified according to the check code and the sequence number；In the case where verification passes through, the video data is played.
- 2. the method as described in claim 1, it is characterised in that described to be regarded according to the check code and the sequence number to described Frequency includes according to verification is carried out：The corresponding video data packet of the sequence number is obtained from the video data；Using the video data packet as key, it is encrypted according to algorithm set in advance, to generate corresponding verification data, its In, the algorithm set in advance is consistent with the generating algorithm of the check code；It is whether consistent with the verification data to compare the check code.
- 3. method as claimed in claim 1 or 2, it is characterised in that described to obtain the corresponding check code of video data and institute Stating the sequence number of the corresponding video data packet of check code includes：Parsing obtains the check code and the sequence number in the video data sent from transmitting terminal；OrReceive third-party server send the check code and the sequence number, wherein, the third-party server be used for from The video data packet is obtained in the transmitting terminal, to generate the check code.
- 4. method as claimed in claim 3, it is characterised in that the method further includes：In verification not in the case of, lose Abandon the video data.
- 5. method as claimed in claim 2, the algorithm set in advance is non-reversible algorithm, wherein, it is described can not inverse operator Method includes MD5 algorithms.
- A kind of 6. video data processing apparatus, it is characterised in that including：Receiving module, for receiving video data；Acquisition module, for obtaining the corresponding check code of the video data and the corresponding video data packet of the check code Sequence number, wherein, the check code is generated by the video data packet in the video data；Correction verification module, for being verified according to the check code and the sequence number to the video data；Playing module, in the case of passing through in verification, plays the video data.
- 7. device as claimed in claim 6, it is characterised in that the correction verification module includes：Acquisition submodule, for obtaining the corresponding video data packet of the sequence number from the video data；Submodule is generated, for using the video data packet as key, being encrypted according to algorithm set in advance, with generation pair The verification data answered, wherein, the algorithm set in advance is consistent with the generating algorithm of the check code；Comparison sub-module, it is whether consistent with the verification data for the check code.
- 8. device as claimed in claims 6 or 7, it is characterised in that the acquisition module includes：Analyzing sub-module, the check code and the sequence number are obtained for being parsed from the video data that transmitting terminal is sent；Or Person,Receiving submodule, for the check code for receiving third-party server transmission and the sequence number, wherein, the described 3rd Square server is used to obtain the video data packet from the transmitting terminal to generate the check code.
- 9. device as claimed in claim 8, it is characterised in that described device further includes：Discard module, for not in the case of, abandoning the video data in verification.
- A kind of 10. video data processing system, it is characterised in that including transmitting terminal and receiving terminal, wherein,The transmitting terminal, for sending video data；The receiving terminal, for receiving the video data；Obtain the corresponding check code of the video data and the verification The sequence number of the corresponding video data packet of code, wherein, the check code is generated by the video data packet in the video data； The video data is verified according to the check code and the sequence number；In the case where verification passes through, described in broadcasting Video data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610939838.6A CN107979765A (en) | 2016-10-25 | 2016-10-25 | A kind of video data handling procedure, apparatus and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610939838.6A CN107979765A (en) | 2016-10-25 | 2016-10-25 | A kind of video data handling procedure, apparatus and system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110572721A (en) * | 2018-06-05 | 2019-12-13 | 北京松果电子有限公司 | Video transmission method and device |
| CN110719499A (en) * | 2019-09-19 | 2020-01-21 | 北京字节跳动网络技术有限公司 | Video downloading method, system, medium and electronic device |
| CN111246387A (en) * | 2019-01-22 | 2020-06-05 | 中国信息通信研究院 | Method and system for acquiring position information by broadband network gateway |
| CN111711863A (en) * | 2020-06-29 | 2020-09-25 | 北京数码视讯科技股份有限公司 | Method and device for preventing program insertion, electronic equipment and storage medium |
| CN113784168A (en) * | 2020-06-10 | 2021-12-10 | 西安诺瓦星云科技股份有限公司 | Program checking method, device and system |
| CN114826669A (en) * | 2022-03-23 | 2022-07-29 | 惠州华阳通用电子有限公司 | Communication data sending and receiving method and device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102884744A (en) * | 2010-05-03 | 2013-01-16 | 罗伯特·博世有限公司 | Method and device for securing data packets to be transmitted via an interface |
-
2016
- 2016-10-25 CN CN201610939838.6A patent/CN107979765A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102884744A (en) * | 2010-05-03 | 2013-01-16 | 罗伯特·博世有限公司 | Method and device for securing data packets to be transmitted via an interface |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110572721A (en) * | 2018-06-05 | 2019-12-13 | 北京松果电子有限公司 | Video transmission method and device |
| CN110572721B (en) * | 2018-06-05 | 2022-02-22 | 北京小米松果电子有限公司 | Video transmission method and device |
| CN111246387A (en) * | 2019-01-22 | 2020-06-05 | 中国信息通信研究院 | Method and system for acquiring position information by broadband network gateway |
| CN110719499A (en) * | 2019-09-19 | 2020-01-21 | 北京字节跳动网络技术有限公司 | Video downloading method, system, medium and electronic device |
| CN113784168A (en) * | 2020-06-10 | 2021-12-10 | 西安诺瓦星云科技股份有限公司 | Program checking method, device and system |
| CN111711863A (en) * | 2020-06-29 | 2020-09-25 | 北京数码视讯科技股份有限公司 | Method and device for preventing program insertion, electronic equipment and storage medium |
| CN114826669A (en) * | 2022-03-23 | 2022-07-29 | 惠州华阳通用电子有限公司 | Communication data sending and receiving method and device |
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