CN111314644A - Video compression method and system based on analog video compressor - Google Patents
Video compression method and system based on analog video compressor Download PDFInfo
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- CN111314644A CN111314644A CN202010182693.6A CN202010182693A CN111314644A CN 111314644 A CN111314644 A CN 111314644A CN 202010182693 A CN202010182693 A CN 202010182693A CN 111314644 A CN111314644 A CN 111314644A
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- 230000006835 compression Effects 0.000 title claims abstract description 41
- 238000007906 compression Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 238000012795 verification Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 238000013500 data storage Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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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
- 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
- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—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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- 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
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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)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
The invention relates to a video compression method and a video compression system based on an analog video compressor. The method comprises the steps of obtaining initialization data of a current frame of a video; determining a private key of the initialization data of the current frame according to the initialization data; according to the initialization data, a video encoder is used for encoding, and the video stream after encoding and compression is determined; determining fingerprint information according to the video stream after encoding and compressing; signing the fingerprint information by using the private key to determine first signature information; signing the coded and compressed video stream by using the private key to determine second signature information; and storing the first signature information and the second signature information into a block chain. The video compression method and the video compression system based on the analog video compressor provided by the invention can prevent the compressed file from being tampered and improve the accuracy of the compressed file.
Description
Technical Field
The invention relates to the field of data processing, in particular to a video compression method and a video compression system based on an analog video compressor.
Background
The existing video systems for obtaining evidence by public inspection and the like have the problems that data storage is centralized, other auxiliary systems are needed for preventing compressed files from being tampered, the compressed files cannot be disclosed to the outside, and the like, or the compressed files are disclosed, so that data are easily tampered.
Disclosure of Invention
The invention aims to provide a video compression method and a video compression system based on an analog video compressor, which can prevent a compressed file from being tampered and improve the accuracy of the compressed file.
In order to achieve the purpose, the invention provides the following scheme:
a video compression method based on an analog video compressor, comprising:
acquiring initialization data of a current frame of a video;
determining a private key of the initialization data of the current frame according to the initialization data;
according to the initialization data, a video encoder is used for encoding, and the video stream after encoding and compression is determined;
determining fingerprint information according to the video stream after encoding and compressing;
signing the fingerprint information by using the private key to determine first signature information;
signing the coded and compressed video stream by using the private key to determine second signature information;
and storing the first signature information and the second signature information into a block chain.
Optionally, the determining the private key of the initialization data of the current frame according to the initialization data specifically includes:
judging whether the initialization data is data of a first frame or not;
if the initialization data is data of a first frame, generating a random number by using a pseudo-random number generator according to the data of the first frame;
generating a private key by adopting an SM2 algorithm according to the random number;
and if the initialization data is not the data of the first frame, directly determining the private key of the initialization data of the current frame according to the initialization data.
Optionally, the storing the first signature information and the second signature information into a block chain further includes:
and packaging, storing or streaming live broadcasting the coded and compressed video stream.
Optionally, the storing the first signature information and the second signature information into a block chain further includes:
determining a public key by using an SM2 algorithm according to the private key;
determining an address according to the public key;
and verifying the signature information by using the public key and the address.
A video compression system based on an analog video compressor, comprising:
the initialization data acquisition module is used for acquiring initialization data of a current frame of the video;
the private key determining module is used for determining a private key of the initialization data of the current frame according to the initialization data;
the video stream determining module after coding compression is used for coding by using a video coder according to the initialization data and determining the video stream after coding compression;
the fingerprint information determining module is used for determining fingerprint information according to the video stream after the coding compression;
the first signature information determining module is used for signing the fingerprint information by using the private key and determining first signature information;
the second signature information determining module is used for signing the coded and compressed video stream by using the private key and determining second signature information;
and the uplink module is used for storing the first signature information and the second signature information into a block chain.
Optionally, the private key determining module specifically includes:
a judging unit, configured to judge whether the initialization data is data of a first frame;
a random number generation unit, configured to generate a random number by using a pseudo-random number generator according to the data of the first frame if the initialization data is the data of the first frame;
the first private key generating unit is used for generating a private key by adopting an SM2 algorithm according to the random number;
and the second private key generating unit is used for directly determining the private key of the initialization data of the current frame according to the initialization data if the initialization data is not the data of the first frame.
Optionally, the method further includes:
and the video stream processing module after encoding and compressing is used for packaging, storing or live broadcasting the video stream after encoding and compressing.
Optionally, the method further includes:
the public key determining module is used for determining a public key by utilizing an SM2 algorithm according to the private key;
the address determining module is used for determining an address according to the public key;
and the verification module is used for verifying the signature information by utilizing the public key and the address.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
according to the video compression method and system based on the analog video compressor, when video data are generated, the uplink of fingerprint information is determined according to the video stream after encoding and compression, and the fingerprint information is carried out by using a block chain technology, so that the verifiability of video tamper resistance is achieved. And simultaneously, the video stream after the coding compression is provided for chain storage, so that the non-tampering characteristic of the video data is achieved. The accuracy of the compressed file is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic flow chart of a video compression method based on an analog video compressor according to the present invention;
fig. 2 is a schematic structural diagram of a video compression system based on an analog video compressor according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a video compression method and a video compression system based on an analog video compressor, which can prevent a compressed file from being tampered and improve the accuracy of the compressed file.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The block chain is a set of governing architecture, and the core of the block chain is an excitation constraint mechanism established based on a plurality of technology combinations. The method adopts technologies such as distributed data storage, point-to-point transmission, consensus mechanism and encryption algorithm to subvert the calculation mode, thereby greatly improving the 'doing harm' threshold. In addition, the block chain also promotes the transition of the information internet to the value internet and the trust internet by setting an incentive mechanism, so that the internal positive force is fully exploited, the ecological order of the network world is maintained, a more benign management architecture is realized, the national management system and the management capacity modernization construction are effectively enabled, and the block chain is widely considered to possibly cause a global technical innovation and industrial change.
Fig. 1 is a schematic flow chart of a video compression method based on an analog video compressor according to the present invention, and as shown in fig. 1, the video compression method based on an analog video compressor according to the present invention includes:
s101, acquiring initialization data of a current frame of a video.
S102, determining a private key of the initialization data of the current frame according to the initialization data.
And judging whether the initialization data is data of a first frame or not.
And if the initialization data is the data of the first frame, generating a random number by using a pseudo-random number generator according to the data of the first frame.
And generating a private key by adopting an SM2 algorithm according to the random number.
And if the initialization data is not the data of the first frame, directly determining the private key of the initialization data of the current frame according to the initialization data.
And S103, encoding by using a video encoder according to the initialization data, and determining the video stream after encoding and compression. The models of video encoders include: h.264, h.265, VP9, MPEG4, or Daala.
And S104, determining fingerprint information according to the coded and compressed video stream. And specifically, determining fingerprint information of the encoded and compressed video stream by using an SM3 algorithm.
S105, signing the fingerprint information by using the private key, and determining first signature information.
S106, signing the coded and compressed video stream by using the private key, and determining second signature information.
S107, storing the first signature information and the second signature information into a block chain. The first signature information and the second signature information may be stored in the same block chain, or may be stored in different block chains.
And packaging, storing or streaming live broadcasting the coded and compressed video stream.
In order to further verify the accuracy of the video compression system based on the analog video compressor provided by the invention, the invention further comprises:
and determining a public key by using an SM2 algorithm according to the private key.
And determining an address according to the public key.
And verifying the signature information by using the public key and the address.
Fig. 2 is a schematic structural diagram of a video compression system based on an analog video compressor provided by the present invention, and as shown in fig. 2, the video compression system based on an analog video compressor provided by the present invention includes: the system comprises an initialization data acquisition module 201, a private key determination module 202, an encoded and compressed video stream determination module 203, a fingerprint information determination module 204, a first signature information determination module 205, a second signature information determination module 206 and an uplink module 207.
The initialization data acquisition module 201 is configured to acquire initialization data of a current frame of a video;
the private key determining module 202 is configured to determine a private key of the initialization data of the current frame according to the initialization data.
The encoded and compressed video stream determining module 203 is configured to perform encoding by using a video encoder according to the initialization data, and determine an encoded and compressed video stream.
The fingerprint information determining module 204 is configured to determine fingerprint information according to the encoded and compressed video stream.
The first signature information determining module 205 is configured to sign the fingerprint information with the private key, and determine first signature information.
The second signature information determining module 206 is configured to sign the encoded and compressed video stream with the private key, and determine second signature information.
The uplink module 207 is configured to store the first signature information and the second signature information in a block chain.
The private key determining module 202 specifically includes: the device comprises a judging unit, a random number generating unit, a first private key generating unit and a second private key generating unit.
The judging unit is used for judging whether the initialization data is data of a first frame.
And the random number generation unit is used for generating a random number by using a pseudo-random number generator according to the data of the first frame if the initialization data is the data of the first frame.
The first private key generating unit is used for generating a private key by adopting an SM2 algorithm according to the random number.
The second private key generating unit is used for directly determining the private key of the initialization data of the current frame according to the initialization data if the initialization data is not the data of the first frame.
The video compression system based on the analog video compressor provided by the invention also comprises: the device comprises a video stream processing module after encoding and compression, a public key determining module, an address determining module and a verifying module.
And the video stream processing module after encoding and compressing is used for packaging, storing or live broadcasting the video stream after encoding and compressing.
And the public key determining module is used for determining a public key by utilizing an SM2 algorithm according to the private key.
And the address determining module is used for determining an address according to the public key.
And the verification module is used for verifying the signature information by using the public key and the address.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A video compression method based on an analog video compressor is characterized by comprising the following steps:
acquiring initialization data of a current frame of a video;
determining a private key of the initialization data of the current frame according to the initialization data;
according to the initialization data, a video encoder is used for encoding, and the video stream after encoding and compression is determined;
determining fingerprint information according to the video stream after encoding and compressing;
signing the fingerprint information by using the private key to determine first signature information;
signing the coded and compressed video stream by using the private key to determine second signature information;
and storing the first signature information and the second signature information into a block chain.
2. The method according to claim 1, wherein the determining the private key of the initialization data of the current frame according to the initialization data specifically comprises:
judging whether the initialization data is data of a first frame or not;
if the initialization data is data of a first frame, generating a random number by using a pseudo-random number generator according to the data of the first frame;
generating a private key by adopting an SM2 algorithm according to the random number;
and if the initialization data is not the data of the first frame, directly determining the private key of the initialization data of the current frame according to the initialization data.
3. The method of claim 1, wherein the storing the first signature information and the second signature information into a block chain further comprises:
and packaging, storing or streaming live broadcasting the coded and compressed video stream.
4. The method of claim 1, wherein the storing the first signature information and the second signature information into a block chain further comprises:
determining a public key by using an SM2 algorithm according to the private key;
determining an address according to the public key;
and verifying the signature information by using the public key and the address.
5. A video compression system based on an analog video compressor, comprising:
the initialization data acquisition module is used for acquiring initialization data of a current frame of the video;
the private key determining module is used for determining a private key of the initialization data of the current frame according to the initialization data;
the video stream determining module after coding compression is used for coding by using a video coder according to the initialization data and determining the video stream after coding compression;
the fingerprint information determining module is used for determining fingerprint information according to the video stream after the coding compression;
the first signature information determining module is used for signing the fingerprint information by using the private key and determining first signature information;
the second signature information determining module is used for signing the coded and compressed video stream by using the private key and determining second signature information;
and the uplink module is used for storing the first signature information and the second signature information into a block chain.
6. The video compression system based on the analog video compressor of claim 5, wherein the private key determining module specifically comprises:
a judging unit, configured to judge whether the initialization data is data of a first frame;
a random number generation unit, configured to generate a random number by using a pseudo-random number generator according to the data of the first frame if the initialization data is the data of the first frame;
the first private key generating unit is used for generating a private key by adopting an SM2 algorithm according to the random number;
and the second private key generating unit is used for directly determining the private key of the initialization data of the current frame according to the initialization data if the initialization data is not the data of the first frame.
7. The analog video compressor-based video compression system of claim 5, further comprising:
and the video stream processing module after encoding and compressing is used for packaging, storing or live broadcasting the video stream after encoding and compressing.
8. The analog video compressor-based video compression system of claim 5, further comprising:
the public key determining module is used for determining a public key by utilizing an SM2 algorithm according to the private key;
the address determining module is used for determining an address according to the public key;
and the verification module is used for verifying the signature information by utilizing the public key and the address.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105975868A (en) * | 2016-04-29 | 2016-09-28 | 杭州云象网络技术有限公司 | Block chain-based evidence preservation method and apparatus |
| CN106604023A (en) * | 2016-11-29 | 2017-04-26 | 北京航天爱威电子技术有限公司 | Video stream authenticity verification method and video stream authenticity verification system |
| CN109035024A (en) * | 2018-08-15 | 2018-12-18 | 杭州链汇通区块链科技有限公司 | Method, system and the storage medium of electronic signature |
| CN109067524A (en) * | 2018-07-31 | 2018-12-21 | 杭州复杂美科技有限公司 | A kind of public private key pair generation method and system |
| WO2019046317A1 (en) * | 2017-08-28 | 2019-03-07 | (N)Alibaba Group Holding Limited | Key data processing method and apparatus, and server |
| CN109871709A (en) * | 2018-12-20 | 2019-06-11 | 顺丰科技有限公司 | Block chain private data deposits card method, system and storage medium |
| US20190355059A1 (en) * | 2018-05-16 | 2019-11-21 | Chicago Mercantile Exchange Inc. | Secure deterministic tokens for encrypting electronic communications |
| CN110601853A (en) * | 2019-09-17 | 2019-12-20 | 腾讯科技（深圳）有限公司 | Block chain private key generation method and equipment |
| EP3591930A1 (en) * | 2017-03-03 | 2020-01-08 | Tencent Technology (Shenzhen) Company Limited | Information storage method, device, and computer-readable storage medium |
-
2020
- 2020-03-16 CN CN202010182693.6A patent/CN111314644A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105975868A (en) * | 2016-04-29 | 2016-09-28 | 杭州云象网络技术有限公司 | Block chain-based evidence preservation method and apparatus |
| CN106604023A (en) * | 2016-11-29 | 2017-04-26 | 北京航天爱威电子技术有限公司 | Video stream authenticity verification method and video stream authenticity verification system |
| EP3591930A1 (en) * | 2017-03-03 | 2020-01-08 | Tencent Technology (Shenzhen) Company Limited | Information storage method, device, and computer-readable storage medium |
| WO2019046317A1 (en) * | 2017-08-28 | 2019-03-07 | (N)Alibaba Group Holding Limited | Key data processing method and apparatus, and server |
| US20190355059A1 (en) * | 2018-05-16 | 2019-11-21 | Chicago Mercantile Exchange Inc. | Secure deterministic tokens for encrypting electronic communications |
| CN109067524A (en) * | 2018-07-31 | 2018-12-21 | 杭州复杂美科技有限公司 | A kind of public private key pair generation method and system |
| CN109035024A (en) * | 2018-08-15 | 2018-12-18 | 杭州链汇通区块链科技有限公司 | Method, system and the storage medium of electronic signature |
| CN109871709A (en) * | 2018-12-20 | 2019-06-11 | 顺丰科技有限公司 | Block chain private data deposits card method, system and storage medium |
| CN110601853A (en) * | 2019-09-17 | 2019-12-20 | 腾讯科技（深圳）有限公司 | Block chain private key generation method and equipment |
Non-Patent Citations (1)
| Title |
|---|
| 孙韵秋等: "基于区块链技术的高校成绩管理系统", 《密码学报》 * |
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