WO2007055442A1 - Method and system for controlling network camera through session initiation protocol - Google Patents

Method and system for controlling network camera through session initiation protocol Download PDF

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Publication number
WO2007055442A1
WO2007055442A1 PCT/KR2006/000410 KR2006000410W WO2007055442A1 WO 2007055442 A1 WO2007055442 A1 WO 2007055442A1 KR 2006000410 W KR2006000410 W KR 2006000410W WO 2007055442 A1 WO2007055442 A1 WO 2007055442A1
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WO
WIPO (PCT)
Prior art keywords
network camera
audio
session
client
sip
Prior art date
Application number
PCT/KR2006/000410
Other languages
French (fr)
Inventor
Kwang-Man Oh
Seung-Seok Jang
Tomohiro Takeuchi
Original Assignee
Netcodec Co.
Asiavision Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Netcodec Co., Asiavision Inc. filed Critical Netcodec Co.
Publication of WO2007055442A1 publication Critical patent/WO2007055442A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H04L65/1104—Session initiation protocol [SIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • 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]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/4223—Cameras
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/6437—Real-time Transport Protocol [RTP]
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/65—Transmission of management data between client and server
    • H04N21/658—Transmission by the client directed to the server
    • H04N21/6587—Control parameters, e.g. trick play commands, viewpoint selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof

Definitions

  • the present invention relates to a method and system for controlling a network camera using session initiation protocol (SIP).
  • SIP session initiation protocol
  • a network camera has been proposed which is connected to a network and allows users to receive images and control the movement of the network camera over the network.
  • the network camera has its own IP address and a server program therein.
  • a remote user logs in to the IP address and receives the images from the network camera.
  • different protocols are used when the remote users access the network cameras. Accordingly, there is a problem in that it is not advantageous in terms of system extendibility and stability, and the remote users should know IP addresses of the network cameras.
  • the present invention provides a method and system for controlling a network camera, which allows a remote client to access the network camera, receive audio and video data, and control the network camera using session initiation protocol (SIP).
  • SIP session initiation protocol
  • the present invention it is possible to ensure the system stability and extendibility through a ubiquitous network camera system, and to use any network camera and terminal which support SIP.
  • the audio/video data is transmitted through real-time protocol, such as RTP/RTCP, it is possible to provide high-quality images and sounds.
  • RTP/RTCP real-time protocol
  • the present invention can be applied to an image monitor system by detecting occurrence of external events.
  • Fig. 1 shows a protocol stack of a SIP-based network camera control system.
  • Fig. 2 is a signaling diagram of session-setup and media-channel-opening procedures between clients.
  • FIG. 3 shows a SIP-based network.
  • FIG. 4 is a block diagram of a SIP-based network camera control system according to an exemplary embodiment of the present invention.
  • FIG. 5 is a signaling diagram showing connection to a network camera and control of the network camera using SIP according to an exemplary embodiment of the present invention.
  • FIG. 6 is a block diagram of a SIP-based network camera according to an exemplary embodiment of the present invention. Best Mode for Carrying Out the Invention
  • the present invention discloses a method of controlling a network camera through a remote client, including: setting up a session with the network camera through session initiation protocol (SIP); setting up an audio/video channel between the remote client and the network camera after the session setup is completed; and displaying audio/ video data received from the network camera through the audio/video channel.
  • SIP session initiation protocol
  • the client may transmit a setup instruction to the network camera through SIP to set up the network camera, or transmit a movement control instruction to the network camera to control the movement of the network camera.
  • the operation of setting up a session may include setting up a session with the network camera through an Internet telephone number which is assigned to the network camera.
  • the present invention also discloses a network camera control system including a remote client, a proxy and a network camera, where the remote client sets up a session with the network camera through session initiation protocol (SIP), an audio/video channel is set up between the remote client and the network camera after the session setup is completed, and audio/video data received from the network camera through the audio/video channel is displayed.
  • SIP session initiation protocol
  • Fig. 1 shows a protocol stack of a session initiation protocol (S ⁇ P)-based network camera control system
  • a SIP layer 130 is provided between an application layer 110 and a UDP layer 150 and performs session setup with a network camera to open an audio/video channel.
  • the session setup is performed through the application layer 110, SIP layer 130, UDP layer 150, IP layer 160 and MAC layer 170.
  • the audio/ video channel is open through an audio/video layer 120 and a RTP (real time protocol)/RTCP (RTP control protocol) layer 140.
  • the audio/video channel is used to transmit audio/video data from the network camera to clients in real time.
  • Fig. 2 is a signaling diagram of session-setup and media-channel-opening procedures between clients.
  • the client A 210 dials the client B 220 and transmits a call through an INVITE method, which is one of methods of SIP.
  • the client B 220 transmits a response message " 100 Trying" to notify that call setup has been attempted, and transmits a message "180 Ringing".
  • a message "200 OK" is transmitted to the client A 210.
  • the client A 210 transmits a response message "ACK".
  • a bidirectional RTP media channel between the clients A and B 210 and 220 is open to transmit/receive the audio/video data.
  • the client B 220 issues a communication completion instruction by hook- on.
  • a response message "200 OK" is received.
  • FIG. 3 shows a SIP-based network.
  • a SIP network includes SIP clients 310a and 310b and SIP proxies 320a and 320b and performs session setup and audio/video channel setup between a SIP client 310a and another SIP client 310b.
  • the SIP client is a network camera.
  • FIG. 4 is a block diagram of a SIP-based network camera control system according to an exemplary embodiment of the invention.
  • a client 410 and a network camera 430 are connected to a network through a proxy
  • the client 410, proxy 420 and network camera 430 support SIP.
  • the network camera 430 has an IP address and an IP telephone number which corresponds to the IP address.
  • the client 410 accesses the network camera 430 through the IP telephone number. An access procedure between the client 410 and the network camera 430 will be described in detail with reference to Fig. 5.
  • Fig. 5 is a signaling diagram showing connection to a network camera and control of the network camera using SIP according to an exemplary embodiment of the present invention.
  • the client 410 performs a user authentication procedure 510 through the proxy 420.
  • the user authentication procedure 510 may be omitted.
  • the user authentication procedure 510 is completed by attempting a call setup through an "INVITE (telephone number)" method, transmitting a response message "407 Proxy Authorization” and retransmitting a message "ACK".
  • INVITE telephone number
  • a session setup procedure 520 is performed.
  • the proxy 420 forwards the "INVITE" method to the network camera 430.
  • the proxy 420 transmits a response message "100 Trying" to notify that the call setup has been attempted.
  • the network camera 430 receives the call, and transmits a message "180 Ringing" to the proxy 420.
  • the proxy 420 transmits the message "180 Ringing" to the client 410.
  • the proxy 420 transmits the message "200 OK" to the client 410.
  • the client 410 transmits a message "ACK" to the network camera 430 through the proxy 420.
  • the session setup procedure 520 is completed.
  • a bidirectional RTP audio/video channel is open to set up an A/V channel.
  • the "INFO” method is typically used in a PSTN signaling message which is performed by MIME appending.
  • the "INFO” method is used in changing the setup value of a camera (CamConfig), PTZ (Pan/Tilt/Zoom) control (PtzControl), or transmission of an alarm signal with respect to an external event.
  • the setup value of a camera can be changed through the INFO (CamConfig) method. For example, it is possible to change the size of a screen, or to control the brightness or contrast of a screen.
  • the network camera 430 transmits a message "200 OK" to notify that the setup value of a camera has been changed.
  • the INFO (PtzControl) method it is possible to control the movement of a camera through the INFO (PtzControl) method. That is, the camera can be moved up and down or zoomed in and out by a driver which drives the network camera. After the camera is moved, the message "200 OK" is transmitted.
  • a sensor may be provided to deal with events. For example, in the event an unwarranted intrusion occurs, audio/video data from the network camera 430 is recorded, or an operator or police station/security agent is notified of the intrusion. After alarming, the message "200 OK" is transmitted.
  • FIG. 6 is a block diagram of a SIP-based network camera according to an exemplary embodiment of the present invention.
  • the network camera includes an audio codec 610, a video buffer 620, an audio/ video processor 630, an Ethernet controller 640, a memory unit 650 and a device controller 660.
  • SIP is incorporated in the audio/video processor 630 and the Ethernet controller
  • Audio data inputted through a microphone is compressed and coded by the audio codec 610.
  • Video data inputted through an image sensor is stored in the video buffer 620.
  • the audio/video processor 630 encodes coded audio data and video data from the video buffer 620 by a coding method such as MPEG-4.
  • the device controller 660 receives a signal from the sensor and controls the video buffer 620 to store the video data in the memory unit 650 or to transmit the video data to the audio/video processor 630.
  • the device controller 660 transmits an instruction to drive a driver so that the driver can perform an operation according to the signal received from the external sensor through an input/output port, such as GPIO (General Purpose Input Output) port, or can perform PAN, TILT or Zoom operation through a serial interface, such as RS485.
  • the Ethernet controller 640 transmits and receives session setup or audio/video channel setup instructions based on SIP.
  • the audio data processed by the audio/video processor 630 is decoded by the audio codec 610 and is output through a speaker.
  • the present invention can be efficiently applied to a method and system for controlling a network camera using session initiation protocol (SIP).
  • SIP session initiation protocol

Abstract

A method of controlling a network camera through a remote client is provided, including: setting up a session with the network camera through session initiation protocol (SIP); setting up an audio/video channel between the remote client and the network camera after the session setup is completed; and displaying audio/video data received from the network camera through the audio/video channel. Accordingly, it is possible to ensure the system stability and extendibility through a ubiquitous network camera system, and to use any network camera and terminal which support SIP.

Description

Description
METHOD AND SYSTEM FOR CONTROLLING NETWORK CAMERA THROUGH SESSION INITIATION PROTOCOL
Technical Field
[1] The present invention relates to a method and system for controlling a network camera using session initiation protocol (SIP).
Background Art [2] A network camera has been proposed which is connected to a network and allows users to receive images and control the movement of the network camera over the network. The network camera has its own IP address and a server program therein. A remote user logs in to the IP address and receives the images from the network camera. [3] In the event network cameras have different server programs, different protocols are used when the remote users access the network cameras. Accordingly, there is a problem in that it is not advantageous in terms of system extendibility and stability, and the remote users should know IP addresses of the network cameras.
Disclosure of Invention
Technical Problem [4] A standard protocol and scheme does not exist when remote users access network cameras to set up sessions and receive images.
Technical Solution [5] The present invention provides a method and system for controlling a network camera, which allows a remote client to access the network camera, receive audio and video data, and control the network camera using session initiation protocol (SIP). [6] Additional features of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention.
Advantageous Effects
[7] According to the present invention, it is possible to ensure the system stability and extendibility through a ubiquitous network camera system, and to use any network camera and terminal which support SIP. [8] In addition, since the audio/video data is transmitted through real-time protocol, such as RTP/RTCP, it is possible to provide high-quality images and sounds. [9] In addition, it is convenient for users to use the network camera since the users access the network camera through Internet telephone numbers rather than IP addresses. [10] Further, the present invention can be applied to an image monitor system by detecting occurrence of external events. Brief Description of the Drawings
[11] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention.
[12] Fig. 1 shows a protocol stack of a SIP-based network camera control system.
[13] Fig. 2 is a signaling diagram of session-setup and media-channel-opening procedures between clients.
[14] Fig. 3 shows a SIP-based network.
[15] Fig. 4 is a block diagram of a SIP-based network camera control system according to an exemplary embodiment of the present invention.
[16] Fig. 5 is a signaling diagram showing connection to a network camera and control of the network camera using SIP according to an exemplary embodiment of the present invention.
[17] Fig. 6 is a block diagram of a SIP-based network camera according to an exemplary embodiment of the present invention. Best Mode for Carrying Out the Invention
[18] The present invention discloses a method of controlling a network camera through a remote client, including: setting up a session with the network camera through session initiation protocol (SIP); setting up an audio/video channel between the remote client and the network camera after the session setup is completed; and displaying audio/ video data received from the network camera through the audio/video channel.
[19] The client may transmit a setup instruction to the network camera through SIP to set up the network camera, or transmit a movement control instruction to the network camera to control the movement of the network camera.
[20] The operation of setting up a session may include setting up a session with the network camera through an Internet telephone number which is assigned to the network camera.
[21] The present invention also discloses a network camera control system including a remote client, a proxy and a network camera, where the remote client sets up a session with the network camera through session initiation protocol (SIP), an audio/video channel is set up between the remote client and the network camera after the session setup is completed, and audio/video data received from the network camera through the audio/video channel is displayed.
[22] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. Mode for the Invention
[23] The invention is described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure is thorough, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like reference numerals in the drawings denote like elements.
[24] Fig. 1 shows a protocol stack of a session initiation protocol (SΙP)-based network camera control system
[25] A SIP layer 130 is provided between an application layer 110 and a UDP layer 150 and performs session setup with a network camera to open an audio/video channel. The session setup is performed through the application layer 110, SIP layer 130, UDP layer 150, IP layer 160 and MAC layer 170. When the session setup is completed, the audio/ video channel is open through an audio/video layer 120 and a RTP (real time protocol)/RTCP (RTP control protocol) layer 140. The audio/video channel is used to transmit audio/video data from the network camera to clients in real time.
[26] Fig. 2 is a signaling diagram of session-setup and media-channel-opening procedures between clients.
[27] In order to open a media channel between a client A 210 and a client B 220, the client A 210 dials the client B 220 and transmits a call through an INVITE method, which is one of methods of SIP. The client B 220 transmits a response message " 100 Trying" to notify that call setup has been attempted, and transmits a message "180 Ringing". When the client B 220 permits a call connection with the client A 210 by hook-off, a message "200 OK" is transmitted to the client A 210. In response to this message, the client A 210 transmits a response message "ACK".
[28] A bidirectional RTP media channel between the clients A and B 210 and 220 is open to transmit/receive the audio/video data. After the audio/video data is completely transmitted, the client B 220 issues a communication completion instruction by hook- on. At this time, when the call from the client B 220 to the client A 210 is terminated by "BYE" method, a response message "200 OK" is received.
[29] Fig. 3 shows a SIP-based network.
[30] A SIP network includes SIP clients 310a and 310b and SIP proxies 320a and 320b and performs session setup and audio/video channel setup between a SIP client 310a and another SIP client 310b. In the present invention, the SIP client is a network camera.
[31] Fig. 4 is a block diagram of a SIP-based network camera control system according to an exemplary embodiment of the invention.
[32] A client 410 and a network camera 430 are connected to a network through a proxy
420. The client 410, proxy 420 and network camera 430 support SIP. The network camera 430 has an IP address and an IP telephone number which corresponds to the IP address. The client 410 accesses the network camera 430 through the IP telephone number. An access procedure between the client 410 and the network camera 430 will be described in detail with reference to Fig. 5.
[33] Fig. 5 is a signaling diagram showing connection to a network camera and control of the network camera using SIP according to an exemplary embodiment of the present invention.
[34] The client 410 performs a user authentication procedure 510 through the proxy 420.
The user authentication procedure 510 may be omitted. The user authentication procedure 510 is completed by attempting a call setup through an "INVITE (telephone number)" method, transmitting a response message "407 Proxy Authorization" and retransmitting a message "ACK".
[35] After the user authentication procedure is completed, a session setup procedure 520 is performed. When the client 410 attempts a session setup to the proxy 420 through the "INVITE" method, the proxy 420 forwards the "INVITE" method to the network camera 430. The proxy 420 transmits a response message "100 Trying" to notify that the call setup has been attempted. The network camera 430 receives the call, and transmits a message "180 Ringing" to the proxy 420. The proxy 420 transmits the message "180 Ringing" to the client 410.
[36] When the network camera 430 transmits a message "200 OK" to the proxy 420, the proxy 420 transmits the message "200 OK" to the client 410. The client 410 transmits a message "ACK" to the network camera 430 through the proxy 420. The session setup procedure 520 is completed.
[37] After the user authentication procedure 510 and the session setup procedure 520 are completed, a bidirectional RTP audio/video channel is open to set up an A/V channel. When the A/V channel is open, the operation of a camera can be controlled through an "INFO" method. The "INFO" method is typically used in a PSTN signaling message which is performed by MIME appending. In the present invention, the "INFO" method is used in changing the setup value of a camera (CamConfig), PTZ (Pan/Tilt/Zoom) control (PtzControl), or transmission of an alarm signal with respect to an external event.
[38] The setup value of a camera can be changed through the INFO (CamConfig) method. For example, it is possible to change the size of a screen, or to control the brightness or contrast of a screen. When the setup value of camera through the INFO (CamConfig) method is changed, the network camera 430 transmits a message "200 OK" to notify that the setup value of a camera has been changed. In addition, it is possible to control the movement of a camera through the INFO (PtzControl) method. That is, the camera can be moved up and down or zoomed in and out by a driver which drives the network camera. After the camera is moved, the message "200 OK" is transmitted.
[39] In addition, a sensor may be provided to deal with events. For example, in the event an unwarranted intrusion occurs, audio/video data from the network camera 430 is recorded, or an operator or police station/security agent is notified of the intrusion. After alarming, the message "200 OK" is transmitted.
[40] Fig. 6 is a block diagram of a SIP-based network camera according to an exemplary embodiment of the present invention.
[41] The network camera includes an audio codec 610, a video buffer 620, an audio/ video processor 630, an Ethernet controller 640, a memory unit 650 and a device controller 660.
[42] SIP is incorporated in the audio/video processor 630 and the Ethernet controller
640. Audio data inputted through a microphone is compressed and coded by the audio codec 610. Video data inputted through an image sensor is stored in the video buffer 620. The audio/video processor 630 encodes coded audio data and video data from the video buffer 620 by a coding method such as MPEG-4. The device controller 660 receives a signal from the sensor and controls the video buffer 620 to store the video data in the memory unit 650 or to transmit the video data to the audio/video processor 630.
[43] The device controller 660 transmits an instruction to drive a driver so that the driver can perform an operation according to the signal received from the external sensor through an input/output port, such as GPIO (General Purpose Input Output) port, or can perform PAN, TILT or Zoom operation through a serial interface, such as RS485. The Ethernet controller 640 transmits and receives session setup or audio/video channel setup instructions based on SIP. The audio data processed by the audio/video processor 630 is decoded by the audio codec 610 and is output through a speaker.
[44] The above-mentioned method according to the present embodiment of the invention may be stored in any form of recording media, such as CD-ROM, RAM, ROM, floppy disk, hard disk, or magneto-optical disk, or in any computer-readable form, such as computer code organized into executable programs. A description of a method of storing an exemplary embodiment of the present invention is well known in the art and will be omitted. [45] It will be apparent to those skilled in the art that various modifications and variation can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. Industrial Applicability
[46] The present invention can be efficiently applied to a method and system for controlling a network camera using session initiation protocol (SIP).

Claims

Claims
[1] A method of controlling a network camera through a remote client, comprising: setting up a session with the network camera through session initiation protocol
(SIP); setting up an audio/video channel between the remote client and the network camera after the session setup is completed; and displaying audio/video data received from the network camera through the audio/video channel. [2] The method of claim 1, wherein the client transmits a setup instruction to the network camera through SIP to set up the network camera, or transmits a movement control instruction to the network camera to control the movement of the network camera. [3] The method of claim 1, wherein setting up a session comprises setting up a session with the network camera through an Internet telephone number which is assigned to the network camera. [4] The method of any one of claims 1 to 3, further comprising authenticating a user between the client and the network camera prior to setting up a session with the network camera through SIP. [5] A network camera control system including a remote client, a proxy and a network camera, wherein the remote client sets up a session with the network camera through session initiation protocol (SIP), an audio/video channel is set up between the remote client and the network camera after the session setup is completed, and audio/video data received from the network camera through the audio/video channel is displayed. [6] The network camera control system of claim 5, wherein the network camera sets up the network camera according to a setup instruction received from the client, or controls the movement of the network camera according to a movement control instruction received from the client. [7] The network camera control system of claim 5, wherein the remote client sets up a session with the network camera through an Internet telephone number which is assigned to the network camera.
PCT/KR2006/000410 2005-11-08 2006-02-03 Method and system for controlling network camera through session initiation protocol WO2007055442A1 (en)

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KR1020050106463A KR100756271B1 (en) 2005-11-08 2005-11-08 Control method of network camera using session initiation protocol, and system thereof
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