Sumikawa Vision Beyond Boundaries

Technological Trend




  • F.A.Q
    		•
  • Technological Trend
    		•
  • Glossary
    		•
  • RMA
    		•
  • Product Live Demo
    		•
  • Download Center
    		•


    What is ONVIF


    In 2008 May, by the axis (AXIS) combined with Bosch (BOSCH) and Sony (SONY) three announced that will work to gether to set up an international open network video products standard network interface development forum, na med ONVIF (Open Network Video Interface Forum), and to the public, the principles of openness jointly formulate open industry standard. Is an open network video interface forum. As of 2011 March, already had 279 companies to join the ONVIF membership. In 2008 November, the forum officially released the first version of ONVIF specification. In 2010 November, the forum has released version second of the ONVIF specification. The device discovery, real-ti me audio and video camera, PIZ control, video control, video analysis etc..


    ONVIF standard function
    The ONVIF specification describes the network video model, interface, data type and data interactive mode. And r euse some existing standards, such as the WS series of standards ONVIF's goal is to realize a video network framework, network video products produced by different manufacturer s (including video front-end, video equipment etc.) complete interoperability.


    Realization of ONVIF standard

    Defined by the ONVIF specification of equipment management and control part of the interface are provided in the form of WebServices. The ONVIF specification covers the definition of XML and WSDL complete. Each support ONVI F standard terminal equipment shall be provided with the function of the corresponding Web Service. The client se rver and data exchange using SOAP protocol. ONVIF in the other parts such as audio and video stream through the RTP/RTSP.


    The advantage of ONVIF specification

    Synergy: different manufacturers to provide products, can be through a unified "language to communicate. To facilitate system integration.

    Flexibility: the end user and the user need not be bound by the inherent some equipment solutions. Greatly reduced the development cost.

    Guarantee of quality: the continued expansion of the specification will be guided by the market, follow the norms also satisfy the mainstream user demand.


    The future of ONVIF

    Due to the adoption of the WSDL+XML model, the expansion will not make ONVIF specification had too much troub le. Convenient expansibility and XML strong and SOAP protocol development will attract more people to pay attent ion to and use ONVIF code. The ONVIF organization is getting more and more powerful, and with the field of PSIA, compared to HDCCTV, occup y the absolute advantage of personnel. The member enterprise equipment manufacturers and integrators famous at home and abroad. A set of specification, protocol of the life cycle, and market share are closely related. And th e development of the ONVIF specification is oriented by market, by the user to enrich. Each member enterprises h ave to strengthen, expand the ONVIF specification right. Covered by ONVIF standard field will continue to increase . At present, relevant content access control system will be incorporated into the ONVIF specification. In the rapid development of security, monitoring system today, the efficiency and quality of the leading value brought by it is self-evident. The ONVIF protocol provides such potential.


    The realization mechanism of standard

    ONVIF Web Service introduction WebService is a modular component of the network, based on distributed, to perform a specific task. WebService mainly uses HTTP and SOAP protocol data transmission in Web. Web users can use SOAP and HTTP to call remote objects by calling the Web method.


    The client based on WSDL description document, will generate a SOAP request, the request may be embedded in an HTTP POST request, sent to the Web Services Web server. Web Services request processor parses the received SOAP request, call the corresponding Web Services. And then generate the corresponding SOAP response. Web s erver SOAP response, then pass through HTTP response way to send messages back to the client.


    WSDL is a Webservices description language (Web Service Description Language) abbreviation. Used to describe a Web service and how to communicate with the Web service of the XML language, provides detailed instructions f or the user interface.


    Construction of SOAP message SOAP Simple Object Access Protocol abbreviation. Is a protocol based on XML. A SOAP message is a simple XML do cument, contains the following elements:

  • The Envelope element must, to this XML document is identified as a SOAP message
  • The optional Header element, contains header information
  • The Body element contains all necessary, call and response information
  • The optional Fault element, provide the relevant information in the error handling the message
  • In sends to the Web Service SOAP request, field in the Body element should be consistent with the WSDL data type. In the process of constructing SOAP, must be obtained from WSDL file and mapping the corresponding relations hips between. However, such a corresponding process will be full of repetitive and mechanical property, in order to avoid the artificial error is not necessary and save development time, a gSOAP compiler tools emerge as the time s require. GSOAP provides a set of transparent SOAP API using compiler technology, and will be developed with independent SOAP implementation details related to the user to hide. The WSDL file parsing serialized as an C/C++ file, the de velopment process of Web Service to minimize.


    The concept of ONVIF specification introduces Web Service to video surveillance. The actual function of the equipm ent are service abstraction to Web Service, the control unit of video monitoring system in the identity of the client, the Web request form to complete the control operation.


    Web Service can bring what video monitoring system?

  • Device independent, any equipment access system, will not impact on other systems.
  • The independence of the equipment, each device is only responsible for the feedback of the received request, don It even need to know the existence of the control terminal.
  • Centralized management, all controlled by the client to initiate.


    • The ONVIF specification can bring what video monitoring system?

    Abstract the function interface. The unification of the equipment configuration and operation mode. The control end is not concerned with the type of equipment, but the equipment provided by the Web Service spe cification for the Service range of Web video system behavior. ONVIF provides the various modules of the WSDL, has a very high efficiency development.


    The contents of ONVIF specification Device discovery

  • Equipment management
  • Equipment input and output service
  • Image configuration
  • Media configuration
  • Real time streaming media
  • The receiver configuration
  • Display service
  • Event processing
  • PTZ control
  • Other

    The application of ONVIF This is a LAN Application of traditional video surveillance system scenarios

  • PU equipment on the line, to the CMU registration, establishing a connection.
  • For the interaction of CMU and PU, request ability set, obtaining configuration
  • CU on the line, to the CMU registration, establishing a connection.
  • For the interaction of CMU and CU, transmission equipment list
  • The CU request to the PU stream


    The application of ONVIF specification of the corresponding scene:

  • PU equipment on the line, to send the CMU HELLO message.
  • CMU needs to search for the device to send the PROBE message, PU.
  • For the interaction of CMU and PU, request ability set, obtaining configuration
  • CU on the line, to the CMU registration, establishing a connection.
  • For the interaction of CMU and CU, transmission equipment list
  • In coordination with the CMU, CU and PU connection transmission stream


    In the above scenario, ONVIF bring what changes? Changes in PU and CMU interaction. CMU is no longer with the PU to keep the long connection. Following the ONVIF specification, signalling and message content with a unified standard


    The development of ONVIF specification based on Project Keyword WSDL gSOAP


    • Border