CN114915768B - Intelligent building security system based on passive optical network - Google Patents
Intelligent building security system based on passive optical network Download PDFInfo
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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
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/40—Scenes; Scene-specific elements in video content
- G06V20/46—Extracting features or characteristics from the video content, e.g. video fingerprints, representative shots or key frames
- G06V20/47—Detecting features for summarising video content
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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
- H04N21/231—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
- H04N21/23106—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion involving caching operations
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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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/84—Generation or processing of descriptive data, e.g. content descriptors
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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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8549—Creating video summaries, e.g. movie trailer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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Abstract
The invention discloses an intelligent building security system based on a passive optical network, and relates to the technical field of Internet of things. The system comprises a plurality of acquisition terminals, a plurality of user terminals, a passive optical network and a cloud server; wherein: each acquisition terminal acquires a security video and uploads the security video to the passive optical network; the passive optical network extracts key frames of the security video as video summaries, intercepts video segments containing the key frames and with preset frame lengths in the security video as target segments, caches the video summaries and the target segments, and uploads the security video to the cloud server for storage; each user terminal is used for acquiring the video abstract and the target segment through a passive optical network to play, or acquiring the security video through the passive optical network to play. The system can cache the target segments which are possibly called by the user in the passive optical network, reduce the local storage pressure, quickly search the required video segments through the video abstract, and reduce the delay and the bandwidth of calling the video through calling the cache video.
Description
Technical Field
The invention relates to the technical field of Internet of things, in particular to an intelligent building security system based on a passive optical network.
Background
With the rapid development of the internet of things and internet + technology, the traditional security system cannot meet the increasing demands of customers for informatization and data application. According to the intelligent security management solution, the advanced technologies such as the Internet of things, cloud computing and big data are adopted, data collection and data analysis processing coexist, and the increasing requirements of customers in the information era can be better met, so that security work is combined effectively through people's air defense, physical defense and technical defense, and personal and property safety is protected comprehensively, quickly, accurately and comprehensively.
The security video is the most common technical means of the current intelligent building security system, but in the prior art, the security video is usually stored in a local or cloud server, the daily accumulated data volume of the security video is huge, the required video data is difficult to search, a large amount of time is consumed, the security video is stored in a local place, a storage burden is caused to the local place, and the security video is stored in the cloud server, so that the security video is called for a longer time delay and occupies a larger bandwidth.
Disclosure of Invention
The invention aims to solve the problems of the background technology and provides an intelligent building security system based on a passive optical network.
The purpose of the invention can be realized by the following technical scheme:
the embodiment of the invention provides an intelligent building security system based on a passive optical network, which comprises a plurality of acquisition terminals, a plurality of user terminals, a passive optical network and a cloud server; wherein:
each acquisition terminal is used for acquiring a security video and uploading the security video to the passive optical network according to a preset period;
the passive optical network is used for extracting a key frame of the security video as a video abstract of the security video, intercepting a video segment containing the key frame and with a preset frame length in the security video as a target segment of the security video, caching the video abstract and the target segment, and uploading the security video to a cloud server for storage;
each user terminal is used for acquiring the video abstract and the target segment through the passive optical network to play, or acquiring the security video through the passive optical network to play.
Optionally, the system further comprises an SDN controller; the passive optical network comprises an optical line terminal OLT and a plurality of optical network units ONU; each acquisition terminal corresponds to one ONU;
each ONU is used for receiving the security video sent by the corresponding acquisition terminal, extracting a key frame of the security video as a video abstract of the security video, generating an abstract directory, and sending the security video, the abstract directory and ONU node information to the OLT;
the OLT is used for intercepting video fragments containing key frames with preset frame lengths in the security video according to the abstract catalog to serve as target fragments of the security video, generating a target fragment catalog, and sending the abstract catalog, the target fragment catalog, OLT node information and ONU node information of each ONU to the SDN controller;
the SDN controller controls the OLT and each ONU to assist in caching the video summary and the target segment.
Optionally, the target ONU includes a first caching unit and a key frame extraction unit; the target ONU is any one of a plurality of ONUs;
the key frame extraction unit is used for selecting a group of candidate key frames in the security video by using a window rule and determining the candidate key frames containing preset image information as a video abstract of the security video;
the first caching unit is used for caching the video summary and/or the target segment according to an instruction of the SDN controller.
Optionally, the summary directory includes a position of a key frame corresponding to each video summary of the security video and image feature information of the key frame;
the OLT comprises an OpenFlow module, a second cache unit and a target fragment intercepting module; wherein
The target segment intercepting module is used for dividing the security video into to-be-selected video segments with preset frame lengths, determining the video abstract number contained in each to-be-selected video segment and the video characteristic information of the to-be-selected video segment according to the abstract catalog, and determining the target segment of the security video according to a preset rule;
the OpenFlow module is used for carrying out data communication with the SDN controller and sending the summary directory, the target fragment directory, OLT node information and ONU node information of each ONU to the SDN controller;
the second caching unit is used for caching the video summary and/or the target segment according to an instruction of the SDN controller.
Optionally, the ONU node information of each ONU comprises at least one of the remaining storage amount of the first caching unit of the node, the arrival rate of the video request, and the characteristics of the cached video; the OLT node information comprises at least one of the residual storage capacity of the second cache unit of the OLT, the arrival rate of video requests and the characteristics of cached videos;
the SDN controller is specifically configured to determine, according to ONU node information of each ONU and the OLT node information, a first number and a first type that the OLT can cache the target segment, and determine a second number and a second type that the ONU can cache the target segment; for the OLT, determining a first number of target segments of a first type in the target segments of all the security videos as first cache videos, and generating a first cache instruction; for the ONU, determining a second number of target fragments of a second type from the target fragments of the security video uploaded by the ONU as a second cache video, and generating a second cache instruction; sending the first cache instruction and the second cache instruction to the OLT;
the OLT is further configured to cache the video summary and/or the target segment according to the first cache instruction, and forward the second cache instruction to the ONU;
the ONU is also used for caching the video abstract and/or the target segment according to the second caching instruction.
Optionally, the types of the user terminal include a common terminal and a management terminal; if the user terminal is a common terminal, the ONU corresponding to the user terminal caches the video abstract sent by the ONU; and if the user terminal is a management terminal, the ONU corresponding to the user terminal caches all the video abstracts in the passive optical network sent by the OLT.
Optionally, each user terminal is specifically configured to send a first video call request to an ONU corresponding to the user terminal, receive the video summary returned by the ONU for the first video call request, determine, according to the video summary, that the target segment to be called is a target call segment, and send a second video call request for the target call segment to the ONU;
the ONU is used for locally searching the target calling segment, sending the target calling segment to the user terminal if the target calling segment is found, and sending the second video calling request to the OLT if the target calling segment is not found;
the OLT is further used for locally searching the target calling segment, if the target calling segment is found, the target calling segment is sent to the user terminal, and if the target calling segment is not found, the second video calling request is sent to the cloud server;
the cloud server is further used for sending the security protection video containing the target calling fragment to the user terminal.
The embodiment of the invention provides an intelligent building security system based on a passive optical network, which comprises a plurality of acquisition terminals, a plurality of user terminals, a passive optical network and a cloud server; wherein: each acquisition terminal is used for acquiring a security video and uploading the security video to the passive optical network according to a preset period; the passive optical network is used for extracting a key frame of the security video as a video abstract of the security video, intercepting a video segment containing the key frame with a preset frame length in the security video as a target segment of the security video, caching the video abstract and the target segment, and uploading the security video to the cloud server for storage; each user terminal is used for acquiring the video abstract and the target segment through a passive optical network to play, or acquiring the security video through the passive optical network to play. The key frame of the security video is extracted through the passive optical network to serve as a video abstract, and the target segment containing the key frame is cached, namely the target segment which is possibly called by a user is cached in the passive optical network, so that the local storage pressure is reduced, the required video segment can be quickly searched through the video abstract, and the delay and the bandwidth of the calling video can be reduced through calling the cached video.
Drawings
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a system block diagram of an intelligent building security system based on a passive optical network according to an embodiment of 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 embodiment of the invention provides an intelligent building security system based on a passive optical network. Referring to fig. 1, fig. 1 is a system block diagram of an intelligent building security system based on a passive optical network according to an embodiment of the present invention. The system includes a plurality of acquisition terminals (a first acquisition terminal, a second acquisition terminal, and a third acquisition terminal), a plurality of user terminals (a first user terminal, a second user terminal, and a third user terminal), a passive optical network, and a cloud server. Wherein:
each acquisition terminal is used for acquiring a security video and uploading the security video to the passive optical network according to a preset period;
the passive optical network is used for extracting a key frame of the security video as a video abstract of the security video, intercepting a video segment containing the key frame with a preset frame length in the security video as a target segment of the security video, caching the video abstract and the target segment, and uploading the security video to the cloud server for storage;
each user terminal is used for acquiring the video abstract and the target segment through a passive optical network to play, or acquiring the security video through the passive optical network to play.
According to the intelligent building security system based on the passive optical network, the key frames of the security videos are extracted through the passive optical network to serve as video abstracts, target segments containing the key frames are cached, namely the target segments which can be called by a user are cached in the passive optical network, the local storage pressure is reduced, the required video segments can be quickly searched through the video abstracts, and the delay and the bandwidth of the called videos can be reduced through calling the cached videos.
In one implementation, the passive optical network may cache the video summary and the target segment within a recent preset time period, and delete the video summary and the target segment beyond the preset time period.
In one implementation, a user may check a video summary through a user terminal to determine whether a passive optical network caches a target segment to be called. If the target segment is cached, the target segment cached by the passive optical network can be directly called, and if the target segment is not cached, the security video can be acquired from the cloud server through the passive optical network.
In one embodiment, referring to fig. 1, the system further comprises an SDN controller; the passive optical network includes an optical line terminal OLT and a plurality of optical network units ONU (a first ONU, a second ONU, and a third ONU), and the embodiment of the present invention is described by taking three ONUs as an example, but the actual situation is not limited thereto; each acquisition terminal corresponds to one ONU;
each ONU is used for receiving the security video sent by the corresponding acquisition terminal, extracting key frames of the security video to serve as video abstracts of the security video, generating an abstract directory, and sending the security video, the abstract directory and ONU node information to the OLT;
the OLT is used for intercepting video fragments containing key frames and with preset frame lengths in the security video according to the abstract directory to serve as target fragments of the security video, generating a target fragment directory, and sending the abstract directory, the target fragment directory, OLT node information and ONU node information of each ONU to the SDN controller;
and the SDN controller controls the OLT and each ONU to assist in caching the video abstract and the target fragment.
In one implementation, an OLT (Optical Line Terminal) is a core component of an Optical access network, and is equivalent to a switch or a router in a conventional communication network, and is also a multi-service providing platform. The Optical fiber interface is generally placed at a local side to provide an Optical fiber interface of a passive Optical Network facing a user, and mainly realizes the functions of connecting an upper Network to complete uplink access of the passive Optical Network, connecting an ONU (Optical Network Unit) to a lower Network, and realizing the functions of controlling, managing, ranging and the like of the ONU. The ONU is connected with the user terminal and is matched with the OLT for use, thereby realizing the functions of two layers and three layers of Ethernet and providing voice, data and multimedia services for users.
In one embodiment, the target ONU comprises a first buffering unit and a key frame extracting unit; the target ONU is any one of a plurality of ONUs;
the key frame extraction unit is used for selecting a group of candidate key frames in the security video by using a window rule and determining the candidate key frames containing the preset image information as the video abstract of the security video;
the first caching unit is used for caching the video abstract and/or the target segment according to an instruction of the SDN controller.
In one implementation, the key frame extraction unit may extract the 1 st frame, the N +1 th frame, the 2N +1 th frame, and so on in sequence from the 1 st frame of the security video. N may be set by a technician according to an actual situation, and is not limited herein, for example, N may be a number of frames of security videos per second.
In one implementation, the preset image information may be set by a technician according to actual situations, and is not limited herein, for example, the preset image information may be a person, an animal, a vehicle, and the like.
In one embodiment, the summary directory comprises the position of a key frame corresponding to each video summary of the security video and the image characteristic information of the key frame;
the OLT comprises an OpenFlow module, a second cache unit and a target fragment intercepting module; wherein
The target segment intercepting module is used for dividing the security video into to-be-selected video segments with preset frame lengths, determining the video abstract number contained in each to-be-selected video segment and the video characteristic information of the to-be-selected video segment according to the abstract catalog, and determining the target segments of the security video according to preset rules;
the OpenFlow module is used for carrying out data communication with the SDN controller and sending the summary directory, the target fragment directory, the OLT node information and the ONU node information of each ONU to the SDN controller;
and the second cache unit is used for caching the video abstract and/or the target segment according to the instruction of the SDN controller.
In one implementation, the image feature information may record content information contained in key frames, for example, people, animals, vehicles, and so on, contained in the key frames. The video feature information may be image feature information of all key frames included in the video segment to be selected.
In one implementation manner, the video segment to be selected, which contains the number of the key frames exceeding the preset threshold, can be determined as the target segment of the security video according to the preset rule. Or all the video clips to be selected can be sequenced from small to large according to the number of the key frames, and the video clips to be selected with the front preset number are selected as target clips of the security video according to the preset rule.
In one embodiment, the ONU node information of each ONU comprises at least one of the remaining storage capacity of the first caching unit of the node, the arrival rate of the video requests and the characteristics of the cached video; the OLT node information comprises at least one of the residual storage capacity of a second cache unit of the OLT, the arrival rate of the video request and the characteristics of the cached video;
the SDN controller is specifically used for determining a first number and a first type of target fragments which can be cached by the OLT according to ONU node information and OLT node information of each ONU, and determining a second number and a second type of the target fragments which can be cached by the ONU; aiming at the OLT, determining a first number of first type target segments in all target segments of security videos as first cache videos, and generating a first cache instruction; for the ONU, determining a second number of target fragments of a second type from the target fragments of the security video uploaded by the ONU as a second cache video, and generating a second cache instruction; sending a first cache instruction and a second cache instruction to the OLT;
the OLT is further used for caching the video abstract and/or the target fragment according to the first caching instruction and forwarding a second caching instruction to the ONU;
the ONU is also used for caching the video abstract and/or the target segment according to the second caching instruction.
In one embodiment, the types of the user terminal include a general terminal and a management terminal; if the user terminal is a common terminal, the ONU corresponding to the user terminal caches the video abstract sent by the ONU; and if the user terminal is a management terminal, the ONU corresponding to the user terminal caches all video abstracts in the passive optical network sent by the OLT.
In one implementation, the permission for viewing the video is different between the common terminal and the management terminal, the common terminal can view the video content uploaded by the ONU corresponding to the user terminal, and the management terminal can view all the video content uploaded through the passive optical network.
In one embodiment, each user terminal is specifically configured to send a first video call request to an ONU corresponding to the user terminal, receive a video summary returned by the ONU for the first video call request, determine, according to the video summary, a target segment to be called as a target call segment, and send a second video call request for the target call segment to the ONU;
the ONU is used for locally searching a target calling fragment, sending the target calling fragment to the user terminal if the target calling fragment is found, and sending a second video calling request to the OLT if the target calling fragment is not found;
the OLT is further used for locally searching a target calling fragment, if the target calling fragment is found, the target calling fragment is sent to the user terminal, and if the target calling fragment is not found, a second video calling request is sent to the cloud server;
and the cloud server is also used for sending the security video containing the target calling fragment to the user terminal.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (6)
1. An intelligent building security system based on a passive optical network is characterized by comprising a plurality of acquisition terminals, a plurality of user terminals, the passive optical network and a cloud server; wherein:
each acquisition terminal is used for acquiring a security video and uploading the security video to the passive optical network according to a preset period;
the passive optical network is used for extracting a key frame of the security video as a video abstract of the security video, intercepting a video segment containing the key frame and with a preset frame length in the security video as a target segment of the security video, caching the video abstract and the target segment, and uploading the security video to a cloud server for storage;
each user terminal is used for acquiring the video abstract and the target segment through the passive optical network for playing, or acquiring the security video through the passive optical network for playing;
the system also includes an SDN controller; the passive optical network comprises an optical line terminal OLT and a plurality of optical network units ONU; each acquisition terminal corresponds to an ONU;
each ONU is used for receiving the security video sent by the corresponding acquisition terminal, extracting a key frame of the security video as a video abstract of the security video, generating an abstract directory, and sending the security video, the abstract directory and ONU node information to the OLT;
the OLT is used for intercepting video fragments containing key frames with preset frame lengths in the security video according to the abstract catalog to serve as target fragments of the security video, generating a target fragment catalog, and sending the abstract catalog, the target fragment catalog, OLT node information and ONU node information of each ONU to the SDN controller;
the SDN controller controls the OLT and each ONU to assist in caching the video summary and the target segment.
2. The intelligent building security system based on the passive optical network as claimed in claim 1, wherein the target ONU comprises a first buffer unit and a key frame extraction unit; the target ONU is any one of a plurality of ONUs;
the key frame extraction unit is used for selecting a group of candidate key frames in the security video by using a window rule and determining the candidate key frames containing preset image information as a video abstract of the security video;
the first caching unit is used for caching the video summary and/or the target segment according to an instruction of the SDN controller.
3. The intelligent building security system based on the passive optical network as claimed in claim 2, wherein the summary directory includes the position of the key frame corresponding to each video summary of the security video and the image feature information of the key frame;
the OLT comprises an OpenFlow module, a second cache unit and a target fragment intercepting module; wherein
The target segment intercepting module is used for dividing the security video into to-be-selected video segments with preset frame lengths, determining the video abstract number contained in each to-be-selected video segment and the video characteristic information of the to-be-selected video segment according to the abstract catalog, and determining the target segment of the security video according to a preset rule;
the OpenFlow module is used for carrying out data communication with the SDN controller and sending the summary directory, the target fragment directory, OLT node information and ONU node information of each ONU to the SDN controller;
the second caching unit is used for caching the video summary and/or the target segment according to an instruction of the SDN controller.
4. The intelligent building security system based on the passive optical network according to claim 3, wherein the ONU node information of each ONU comprises at least one of the remaining storage capacity of the first cache unit of the node, the arrival rate of video requests and the characteristics of cached videos; the OLT node information comprises at least one of the residual storage capacity of the second cache unit of the OLT, the arrival rate of video requests and the characteristics of cached videos;
the SDN controller is specifically configured to determine, according to ONU node information of each ONU and the OLT node information, a first number and a first type of the OLT cache target segments, and determine a second number and a second type of the ONU cache target segments; for the OLT, determining a first number of first type target segments in all target segments of the security videos as first cache videos, and generating first cache instructions; for the ONU, determining a second number of target fragments of a second type in the target fragments of the security video uploaded by the ONU as a second cache video, and generating a second cache instruction; sending the first cache instruction and the second cache instruction to the OLT;
the OLT is further configured to cache the video summary and/or the target segment according to the first cache instruction, and forward the second cache instruction to the ONU;
the ONU is also used for caching the video abstract and/or the target segment according to the second caching instruction.
5. The intelligent building security system based on the passive optical network as claimed in claim 4, wherein the types of the user terminal include a common terminal and a management terminal; if the user terminal is a common terminal, the ONU corresponding to the user terminal caches the video abstract sent by the ONU; and if the user terminal is a management terminal, the ONU corresponding to the user terminal caches all the video abstracts in the passive optical network sent by the OLT.
6. The intelligent building security system based on the passive optical network as claimed in claim 5,
each user terminal is specifically used for sending a first video calling request to an ONU (optical network unit) corresponding to the user terminal, receiving the video abstract returned by the ONU aiming at the first video calling request, determining the target fragment to be called as a target calling fragment according to the video abstract, and sending a second video calling request aiming at the target calling fragment to the ONU;
the ONU is used for locally searching the target calling segment, sending the target calling segment to the user terminal if the target calling segment is found, and sending the second video calling request to the OLT if the target calling segment is not found;
the OLT is further used for locally searching the target calling segment, if the target calling segment is found, the target calling segment is sent to the user terminal, and if the target calling segment is not found, the second video calling request is sent to the cloud server;
the cloud server is further used for sending the security protection video containing the target calling fragment to the user terminal.
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