The user adjusted encoding parameters can take effect at once without pausing or restarting of network transmitting and recording.

In the surveillance system, for static monitoring scene, video can be recorded in low bit rate through reducing resolution, image quality, bit rate and frame rate, while changing of image scene requires higher resolution , bit rate and frame rate of video, etc to get high quality video stream. Since the above parameters can be dynamically modified, continuous images can be maintained without switching files frequently. And it does not only meet the requirement of high-quality images at critical moments, but also save the disk space and network bandwidth.

Double Common Intermediate Format, a format of color images whose resolution is 528 x 384 pixels (PAL) or 528 x 320 pixels (NTSC)

It means a channel of video images passing through the video coder, and output 2 independent bit streams as shown in the figure:

The resolution, frame rate, bit rate and other parameters of output bit stream can be set independently. The output dual steam can meet different demands, for example, one for hard disk storage and the other for network transmission.

ABF  (Auto Back Focus) technology allows Hikvision box cameras to adjust the  position of the image sensor to obtain optimal focus. This feature can  also be accessed via the Web client. 

                                                                 

NVRs (Network Video Recorders) with  the ANR (Automatic Network Replenishment) function can automatically  store video data on the IPC (Internet Protocol Camera) storage card when  the network is disconnected. After recovery of the network, the NVR  automatically retrieves the video data stored on the camera.

Audio  Loss Detection is one of the exception detections in Hikvision’s Smart  Features set. When this function is enabled, alarm actions will be  triggered when there is audio loss. 

                                                                 

BLC  (Backlight Compensation) compensates for the luminance of video  captured in a backlit environment, while maintaining the luminance of  the overall video sequence. Simply put, BLC enables objects that appear  dark to be visible against a very bright background such as in front of a  window or entrance. BLC is usually effective for some specific region  in the video, as the background is usually overexposed.

DIS  (Digital Image System) cameras are a new series of analog entry-level  products developed by Hikvision. With excellent image quality, low power  consumption, and high reliability, DIS cameras can provide a perfect  cost-effective alternative to traditional analog cameras. 

                                                                 

By  modeling the imaging features of smoke, dust, fog, etc., defog  technology effectively restores details and color to obtain accurate and  natural video. Defog technology helps maintain clarity in images  captured in poor weather conditions such as rain, smog, or fog.    

                                                                 

Digital watermark technology embeds the device information onto the recorded video. Digital watermarks may be used to verify the authenticity or integrity of the video or to show the identity of its owners.

                                                                 

Defocus  detection is one of the exception detections in Hikvision’s Smart  Features set. When this function is enabled, alarm actions will be  triggered when the camera is out of focus.

                                                                 

Hikvision  cameras adopt 3D digital noise reduction to provide images with less  noise in low-light surveillance scenes compared to conventional cameras.  3D DNR can be used to enhance image quality and save bandwidth.  

In  conditions with slight vibrations (e.g., an electrical pole in strong  winds), videos will appear fuzzy due to the vibration. EIS (Electronic  Image Stabilization) can help reduce the effects of vibration in a  video.

                                                                 

Face  Detection is one of the detection features in Hikvision’s Smart  Features set. With Hikvision face detection technology, a 4-line network  camera can accurately detect human faces, capture facial images, or  trigger an alarm. 

HDD  (Hard Disk Drive) Group mode is one of the HDD storage modes in  Hikvision DVRs/NVRs. Multiple HDDs can be managed in groups. Video from  specified channels can be recorded onto a certain HDD group through HDD  settings.

HDD  (Hard Disk Drive) Quota mode is one of the HDD storage modes in  Hikvision DVRs/NVRs. Each camera can be configured with an allocated  quota of HDDs to store recorded files. 

                                                                 

The  video surveillance heat map records the motion of customer foot traffic  over a period of time and displays temporal density and spatial  statistics in different colors. For instance, in the figure red shows  the areas customers most frequently visited and tended to stay longer,  and blue reflects otherwise. Heat map is ideal for use in locations such  as supermarkets, retail stores, etc., to help businesses identify the  most popular merchandise and where to place products in order to  increase sales. 

                                                                 

In  conditions with a strong light source towards the camera, there will be  over-exposed areas, or “high light.” The HLC (High Light Compensation)  function can automatically recognize and constrain the high light to  make objects more distinguishable. 

HD-TVI  (High Definition Transport Video Interface) is an open standard for  analog video transmission and is based on the original analog  transmission media. The advantages of HD-TVI are as follows: 

1) Farther transmission distance

2) Higher video resolution

3) Reliable anti-interference performance as it carries low-frequency signal 

Cameras  with the ICR (IR Cut filter Removable) function have a mechanical IR  filter that filters infrared light during the day to correct color casts  caused by infrared light. At night the camera removes the filter  automatically to let infrared light pass through, enhancing night  visibility.