Samsung covers HDip & HDcctv markets.
The term HD (hi definition) video, i.e. high definition video, came to CCTV from the field of television and multimedia. At the beginning of the new century, the rapid development of liquid crystal and plasma display technologies — the possibility of creating inexpensive screens with a large diagonal — made it possible to appreciate the advantages of high-resolution images. Digital high-definition television formats replaced analog ones.
Of course, the processes taking place in broadcast television, digital photo and video technology could not bypass applied television, which is CCTV. The transition to digital standards of high-definition video images opens up new horizons for security video surveillance systems.
First of all, we are talking about obtaining a highly detailed image with the possibility of subsequent scaling. Digital processing of megapixel images allows you to analyze individual areas of the frame — to recognize a car number or the face of an intruder.
The second important advantage of the transition of CCTV to digital high-definition standards was the achievement of a balance between the resolution of the video image formed by the camera and the resolution of the monitor. Outputting an image of an analog standard to the screen of an LCD or plasma monitor is accompanied by a deterioration in the contrast and brightness of the image, and the color suffers. The resolution of megapixel cameras corresponds to the resolution of modern monitors and guarantees a high degree of image reliability and visual comfort for the operator.
Finally, a number of companies producing megapixel cameras in their products implement the idea of replacing several analog cameras installed side by side with one high-resolution digital camera. There is some truth in this. Small objects — cafes, gas stations, small shops, can be equipped with one or two megapixel cameras with a specialized wide-angle lens. In conditions of a limited observation area, they are capable of replacing 3-4 analog standard TV cameras.
Of course, the penetration of high-definition video technologies into the CCTV field was associated with the need to solve a number of technical problems.
The most fundamental task was the need to select an image transmission interface.
The information computing network based on the TCP/IP protocol stack became such an interface. Indeed, the IP network is best suited for creating a high-definition video surveillance system. Data is transmitted digitally, which means we are not bound by any analog standard. The topology of the IP network can be so diverse and complex that scaling the system is not difficult. Support by manufacturers of Onvif specifications allows us to talk about the existence of a certain standard and compatibility of devices, which has a positive effect on the spread of HD ip systems.
Currently, Samsung Techwin offers a wide range of IP cameras with HD (1280 x 720) and Full HD (1920 x 1080) resolution. The model range is represented by fixed and rotating cameras for indoor and outdoor installation (up to -50°C).
The model range is based on the most modern CMOS matrices and WizeNet I and WizeNet II processors, which provide the following characteristics and functions:
— Image resolution: 2048 x 1536, 1920 x 1080, 1600 x 1200 (WizeNet II), 1280 x 1024, 1280 x 720p, 800 x 600, 640 x480, 320 x 240 (WizeNet I, WizeNet II);
— Simultaneous generation of up to ten H.264/MPEG-4/M-JPEG video streams with different resolution/speed characteristics depending on the nature of the events and the applications used; streams can also have an aspect ratio corresponding to the HD format (16:9);
— built-in video analytics (WizeNet I), supporting scheduled operation and alarm activation based on a system event: crossing a virtual line by an object in a certain direction, entering or leaving a zone by an object, detection of abandoned/disappeared objects, attempt to interfere with the camera operation (changing the angle, focus, etc.);
— control of the intensity of the infrared LED illumination depending on the shooting distance (implemented in cameras with IR illumination);
— SSNRIII noise reduction (two-dimensional and three-dimensional filtering);
— Samsung SSDR dynamic range expansion technology;
— the presence of an analog output for adjusting the camera at the installation point or for use in traditional analog CCTV systems;
— use of a web interface for setting up and operating the camera;
— electronic scaling and panning of the image;
— the ability to fine-tune the GOP structure of H.264/MPEG4 video streams;
— simultaneous transmission and reception of audio;
— 5 different white balance settings;
— backlight compensation from bright light sources entering the frame;
— privacy masking function, allowing you to specify up to 12 image areas that are not subject to video monitoring;
— the ability to locally store video data on a built-in SDHC memory card, — activated when certain events occur and/or according to a schedule;
— support for the ONVIF specification version 1.02.
In addition to the listed functions, cameras with a WizeNet II processor and a resolution of 3 MP have Smart Compression technology, which allows for more efficient use of the transmission channel bandwidth. Thus, by selecting areas of interest in the image, you can adjust the degree of compression in them independently of the general part of the frame. Smart Compression technology also works with the Face Detection algorithm. Thus, automatically selected face images are subject to less compression.
However, Samsung Techwin offers not only a high-definition IP solution. The company is actively involved in the creation of devices of another standard — HD cctv. The idea of using coaxial cables and topology inherent in analog systems to create high-definition CCTV arose in the early 2000s. HD-SDI technology, known as the SMPTE 292M standard, is used in television broadcast systems to transmit high-definition video — HD and FullHD. A coaxial cable with a wave resistance of 75 Ohm is used for transmission. The transmission range of the image depends on the quality of the cable, since the transmission is carried out in digital form, and the transmission speed in the SMPTE 292M standard is 1.5 Gbit/s. On average, the transmission range is 150 m, which is a typical average distance for existing analog systems using coaxial cable. HD-SDI signals are recorded on HD video recorders, switching can be performed by HD-SDI switches, widely used in broadcast systems, and image output to a monitor with an SDI or HDMI input is performed using converters. As a result, HD cctv technologies can be attractive not only for creating new systems, but also for upgrading existing analog standard definition systems.
Samsung Tehwin currently produces two HD cctv cameras: SCB-6000 and SCB-6080. The cameras can broadcast HD (1280 x 720) and FullHD (1920 x 1080) images. The choice is made in the camera menu, where you can also select various SCB-6080
image adjustment modes, including Samsung's proprietary technologies — SSNR III noise reduction, SSDR extended dynamic range, etc.
For image recording, the company has developed a 4-channel digital video recorder SRD-480D, which provides a set of functions typical of existing standard definition models, including access via IP network, copying to DVD-RW and USB.
Perhaps the question arises: can two technologies HD ip and HD cctv coexist? And aren't they mutually exclusive?
Indeed, the technologies compete with each other, but each of them has advantages that the other does not have. Thus, HD ip systems have greater flexibility and scalability advantages due to the use of an IP network. The issue of remoteness of objects is not so acute here. On the other hand, IP technologies are still complex for most installers, and compression and latency of video transmission limit the use of IP cameras for objects where the image must be truly «live». Thus, HD cctv systems can be in demand as an inexpensive option for broadcast systems for meetings, courts, conferences.