10 terms you need to know to choose your Hikvision cameras
1. WDR (Wide Dynamic Range)
WDR: In conditions with very bright and dark areas, such as at an entrance door in an office building or an entranceway to an indoor parking garage or tunnel, a camera may capture over-exposed images in bright areas and under-exposed images in dark areas, which greatly affects image quality. A camera with WDR (Wide Dynamic Range) can help solve this issue. By combining images with short exposure (for bright areas) and long exposure (for dark areas) into one image, WDR technology captures both bright areas and dark areas clearly. Read More: Hikvision Australia
2. VF(Vari-focal), Motorised VF, Fixed Lens
VF(Vari-focal): A varifocal lens is a lens that can zoom in and out. You can adjust the lens so that it captures a wider area or so that it focuses in more detail on a smaller area.
Motorised VF: Compared with the conventional manual vari-focal lens, a camera has the motorised zoom lens can automatically adjust the focal length of camera to get clear auto focused image. This makes security camera installation become much quicker and easier. Additionally, the motorised zoom lens can be controlled through Zoom/Focus buttons on web interface, smartphone App, or even the Joystick PTZ controller.
Fixed Lens: A fixed lens is set to focus on objects at a certain distance, and it cannot be adjusted. It is a bit like those disposable cameras you used to take on school field trips in middle school, where you cannot adjust the zoom.
3. Dual Stream, Triple Streams
Dual Stream: 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.
Triple Streams: Triple streams provide much more flexibility to users by allowing different data streams to be sent simultaneously. Each stream has independent purposes:
• The first stream with high resolution and full frame rate can be used for main monitoring.
• The second stream with lower resolution can be used for mobile monitoring.
• The third stream with high, low, or dynamic resolution offers more flexible choices.
4. ICR (IR Cut filter Removable)
ICR: 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.
5. 3D DNR
3D DNR: 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.
6. BLC (Backlight Compensation)
BLC: 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.
7. EXIR IR
Hikvision has developed the EXIR system which uses a lens configuration to make the illumination pattern rectangular and more evenly dispersed. EXIR technology gives uniform IR illumination. This eliminates traditional LED lens issues, such as over-exposure at the centre of images, and darker areas at corners.
8. H.265
H.265/ HEVC was developed with the goal of providing twice the compression efficiency of the previous standard, H.264 / AVC. Although compression efficiency results vary depending on the type of content and the encoder settings, at typical consumer video distribution bit rates HEVC is typically able to compress video twice as efficiently as AVC. End-users can take advantage of improved compression efficiency, it makes 4K video much easier to stream, download, or rip to your hard drive.
9. Dome, Turret and Bullet Camera
Dome camera offers an amazing vandal proof ability as the lens is fully covered in a vandal proof glass dome. Also some customers say this model makes people difficult to tell the direction of lens, they may think this camera is '360 degree'.
The Turret camera is becoming the more preferred camera of choice amongst professionals. This camera offers the same high quality imagery of the dome, but without the pitfalls caused by the glass housing. These cameras also have an EXIR which is Hikvision’s ‘Extended IR’. This is a single IR glass to the side of the lense, as opposed to the traditional ring of leds.
The Bullet camera, Because its shape and size, the body can house large zoom capabilities and extended IR. This camera choice is more popular for commercial and rural installations where lighting is poor.
10. HD-TVI (High Definition Transport Video Interface) and Network Camera
HD-TVI: 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
A network camera, often also called an IP camera, can be described as a camera and computer combined in one unit. The main components of a network camera include a lens, an image sensor, one or several processors, and memory. The processors are used for image processing, compression, video analysis and networking functionalities. The memory is used for storing the network camera’s firmware (computer program) and for local recording of video sequences.
1. WDR (Wide Dynamic Range)
WDR: In conditions with very bright and dark areas, such as at an entrance door in an office building or an entranceway to an indoor parking garage or tunnel, a camera may capture over-exposed images in bright areas and under-exposed images in dark areas, which greatly affects image quality. A camera with WDR (Wide Dynamic Range) can help solve this issue. By combining images with short exposure (for bright areas) and long exposure (for dark areas) into one image, WDR technology captures both bright areas and dark areas clearly. Read More: Hikvision Australia
2. VF(Vari-focal), Motorised VF, Fixed Lens
VF(Vari-focal): A varifocal lens is a lens that can zoom in and out. You can adjust the lens so that it captures a wider area or so that it focuses in more detail on a smaller area.
Motorised VF: Compared with the conventional manual vari-focal lens, a camera has the motorised zoom lens can automatically adjust the focal length of camera to get clear auto focused image. This makes security camera installation become much quicker and easier. Additionally, the motorised zoom lens can be controlled through Zoom/Focus buttons on web interface, smartphone App, or even the Joystick PTZ controller.
Fixed Lens: A fixed lens is set to focus on objects at a certain distance, and it cannot be adjusted. It is a bit like those disposable cameras you used to take on school field trips in middle school, where you cannot adjust the zoom.
3. Dual Stream, Triple Streams
Dual Stream: 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.
Triple Streams: Triple streams provide much more flexibility to users by allowing different data streams to be sent simultaneously. Each stream has independent purposes:
• The first stream with high resolution and full frame rate can be used for main monitoring.
• The second stream with lower resolution can be used for mobile monitoring.
• The third stream with high, low, or dynamic resolution offers more flexible choices.
4. ICR (IR Cut filter Removable)
ICR: 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.
5. 3D DNR
3D DNR: 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.
6. BLC (Backlight Compensation)
BLC: 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.
7. EXIR IR
Hikvision has developed the EXIR system which uses a lens configuration to make the illumination pattern rectangular and more evenly dispersed. EXIR technology gives uniform IR illumination. This eliminates traditional LED lens issues, such as over-exposure at the centre of images, and darker areas at corners.
8. H.265
H.265/ HEVC was developed with the goal of providing twice the compression efficiency of the previous standard, H.264 / AVC. Although compression efficiency results vary depending on the type of content and the encoder settings, at typical consumer video distribution bit rates HEVC is typically able to compress video twice as efficiently as AVC. End-users can take advantage of improved compression efficiency, it makes 4K video much easier to stream, download, or rip to your hard drive.
9. Dome, Turret and Bullet Camera
Dome camera offers an amazing vandal proof ability as the lens is fully covered in a vandal proof glass dome. Also some customers say this model makes people difficult to tell the direction of lens, they may think this camera is '360 degree'.
The Turret camera is becoming the more preferred camera of choice amongst professionals. This camera offers the same high quality imagery of the dome, but without the pitfalls caused by the glass housing. These cameras also have an EXIR which is Hikvision’s ‘Extended IR’. This is a single IR glass to the side of the lense, as opposed to the traditional ring of leds.
The Bullet camera, Because its shape and size, the body can house large zoom capabilities and extended IR. This camera choice is more popular for commercial and rural installations where lighting is poor.
10. HD-TVI (High Definition Transport Video Interface) and Network Camera
HD-TVI: 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
A network camera, often also called an IP camera, can be described as a camera and computer combined in one unit. The main components of a network camera include a lens, an image sensor, one or several processors, and memory. The processors are used for image processing, compression, video analysis and networking functionalities. The memory is used for storing the network camera’s firmware (computer program) and for local recording of video sequences.
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