AiVu-NVR allows managing parameters such as framerate, resolution and compression ratio by more than one user simultaneously. The video cameras can be accessed independently by several users in order to display images and set parameters involving live streams and recordings. Video stream transmission is carried out using communication services based on the IP protocol family (TCP or UDP).

AiVu-NVR is also capable of encoding and managing signals controlling PTZ video cameras, door opening or any field device.

AiVu-NVR is capable of high-performance transmission on narrow-band channels or wide-band channels. The system performance is optimal over GSM/GPRS networks as well thanks to the high compression ratio achieved by the H.264, MPEG-4, H.263 and MJPEG video encodings.

The device is a “hybrid” DVR/NVR: it can optionally be provided with 4 analog inputs to acquire video signals originating from video cameras. AiVu-NVR is provided with 8/16/32 IP inputs to support devices such as native IP video cameras, megapixel video cameras or video servers generating digital streams.

Video analysis module (optional)

AiVu-NVR integrates modules for Video Content Analysis (VCA). The employed image processing algorithms perform motion detection on the images provided by the video cameras, generating alarm notifications in case of events involving the security of the monitored area. AiVu-Smart Modules is the ideal “Full Software” solution for applications involving the control of road traffic safety conditions (AID - Automatic Incident Detection) and the detection of dangerous events for the security of railways and subways.

AiVu-NVR supports AXIS, ACTi, DALLMEIER, SIQURA, IQINVISION, HITRON, LUMENERA and SONY video cameras and video servers and all video cameras/video servers based on the MJPEG standard. The device manages the commonest PTZ protocols: PELCO P/D and PELCO P/D-compatible, BOSCH G3/G4, SAMSUNG, PANASONIC, ULTRAK KD6, VIDO, HITRON, COMERSON.

Features

• Optimal usage of limited-band transmission lines and distribution to mobile devices such as “smart phones”

• Video stream transcoding with user-definable coding standards, resolutions and framerates

• Video stream crypting to guarantee a high security level and the respect of privacy

• Video analysis on board the same machine to aid the operator in managing a large number of video cameras

• The software-only version is also available for use on selected hardware

• Processor architecture to guarantee high reliability and ease of maintenance

• Embedded Linux operating system on an encrypted flash disk with a web interface for system management/administration

• Video encoding software package compliant with H.264, H.263, MPEG-4, MJPEG standards to reduce the required space for image storing and to optimize the required bandwidth

• Device operating parameters settable from the Operator Console: the framerate (number of images per second) can be dynamically set for each video camera, in a range between 1 and 25 F/sec., as well as the bandwidth of each video stream, in a range between 5 Kbit/sec. and 2 Mbit/sec.

• Live and recorded images can be cropped in order to optimize bandwidth occupation and image quality: the cropping is carried out directly on the NVR and a video stream is created only for the selected image region.

• Programmable time slots to prevent recording, live stream displaying, PTZ command transmission, digital I/O management and alarm control.

• Independent live and/or recorded video stream encrypting for each connected video camera.

High performance

The AiVu-NVR device acquires, converts and records video streams for each channel with a framerate up to 25 images per second (30 in case of NTSC video signals) at 4CIF resolution (704x576). The employed algorithms allow defining how much bandwidth to use for communications, how much space to use in case of local storage and video quality.  An automatic trade-off mechanism kicks in in case of excessive network load.

Multistandard compression

Video compression is available in H.264/H.263 standards for limited-bandwidth networks, MPEG-4  for efficiency and quality, MPEG for the best static definition. Each of these standards offers different advantages and the possibility to choose allows meeting different requirements. Several output digital video streams, each with its own parameters and compression standards, can be defined for each input video camera. For example, it is possible to transmit with a certain standard, to record with another and to display the recorded  streams with yet another.

Video stream transcoding

The “transcoding” functionality allows to acquire and store locally at high resolution (even Megapixel), and to “re-encode” and transmit live/recorded streams with different resolution parameters, framerates and encoding standards. For example, the system can record megapixel video camera streams at a 30Mbit/s bitrate and later allow easy browsing of the recordings with a common ADSL line with a 256 Kb/s upload bandwidth.