Video Phone DVR Viewer supports video surveillance function in AddPac next generation network DVR solution and AddPac video phone environment. AddPac network DVR solution is composed of MPEG-4 based network camera, DVR data saving and streaming server, live displayer for multichannel live video display, PC based Smart DVR Viewer for live video and archive video surveillance, video phone based DVR Viewer for live video and archive image surveillance, and Smart DVR Manager to manage network DVR.
Video Phone Based DVR Viewer for Live and Archive Image Surveillance Function
AddPac video phone can be used in various video communication environments such as 1:1 video calling, IP video telephony function (IP-PBX environment), and video conference environment. AddPac also provides application services such as IP video broadcasting, VoD service, IPTV service function, and network surveillance function.
DVR surveillance function in video phone can be used under AddPac network DVR solution environment as described below.
AddPac Video Phone DVR Viewer uses TCP/IP protocol from DVR server. It receives live or archive video bit stream to display on screen by decoding.
Live Video Surveillance Function
Video Phone DVR Viewer can display the MPEG-4 based multichannel live video bit stream on TCP/IP reception, MPEG4 decoding, and video phone screen. Live DVR Viewer functions are including; live camera selection function, live PTZ function, live audio control function, and information display.
PAN/TILT/ZOOM Camera Remote Controlling
Video Phone DVR Viewer performs to control network camera PAN/TILT/ZOOM. Smart DVR Manager supports additional services such as camera brightness, mirror function and reset function along with specific network camera PAN/TILT/ZOOM function.
Audio Play Function
Video Phone DVR Viewer plays both video broadcasting and audio information from network camera. It also provides to play the audio information of live video or saved video. Audio codec supports G.711, G.726 and listen to the actual sound of the specific place with selected network camera.
Saved DVR Video Play Function
Video Phone DVR Viewer supports to play archive video which is saved in DVR server. It provides the player to decode the media file by date and time in each network camera. Archive video player in Video Phone DVR Viewer shows detail information of network camera bandwidth, frame rate, video resolution, screen skip, slow rewind (1/4X, 1/2X), and fast rewind (2X, 4X, 8X).
Video Error Concealment Function
The network DVR solution can be used in various internet environments such as IP based leased line, DSL, ATM, frame relay, and satellite network. It can have different QoS qualities (packet loss, jitter, etc) depending on internet network quality. For instance, Qos quality is low compare to other network due to jitter and packet loss in satellite network. In this case, compressed video image with VLC (variable length coding) causes distorted screen. A severe distorted screen may occur with higher compressibility codec such as MPEG-4. The video error concealment prevents distorted screen image in case of losing video packet. It is basically designed to use this function.