HD-CCTV is a new standard designated for joint development of high-definition surveillance system (High DefiniTIon Surveillance Systems) applications proposed by several chip and system suppliers in 2009. Although the standard has been proposed in less than two years, due to its own advantages, and more and more manufacturers join, the HD-CCTV standard in today's high-definition surveillance industry can be said to have gradually started and The Open Network Video Interface Forum (ONVIF) and the Physical Security Interoperability Alliance (PSIA) form a three-legged situation.
To put it simply, HD-CCTV utilizes the earliest SDI link developed for the professional broadcast market, that is, the transmission line from the camera-DVR in the analog security system that is now widely used. Handshake protocol for information such as video resolution and frame rate. Such an analog high-definition video transmission mode (HD-SDI) is the most important basic core technology in HD-CCTV. HD-CCTV camp supporters expect the new standard to lead to an easier-to-deploy, lower-cost alternative to Internet Protocol (IP) systems.
When it comes to IP systems, it is currently the mainstream standard for high-definition video surveillance system applications. As the IP standard is put forward, the high-definition monitoring solution can really gain practical application value. The IP system greatly improves the video data carrying capacity, which greatly improves the resolution of the video image, and it has the advantages of high scalability, scalability (wide coverage of the IP system), and centralized management. The current ONVIF and PSIA are camps based on IP solutions. At present, they all have the support of some industry leaders. For example, ONVIF has IP camera sales giants such as Axis and Sony. There are also many big brands such as Cisco, GE, Honeywell and Panasonic in PSIA. In various exhibitions in the security industry in recent years, IP-based high-definition video surveillance solutions are really popular. However, from the actual use of IP systems in security systems in recent years, only accounted for 10%. So the actual achievements and the expectations of these manufacturers have to say that there is still a big gap, which is not related to the characteristics of the IP system. Simply analyze, the current problems with the IP system mainly include the following:
1. IP device management is difficult.
Although the good management and good scalability of IP equipment is a big advantage, from the actual construction of such a management system, especially for existing security system solutions that are mainly simulation-based, it requires more investment Large human and material costs.
2. Upgrading from a simulated system is expensive
As mentioned earlier, the vast majority of current security solutions are based on analog systems. Then if you upgrade from an analog system to an IP system, there are various difficulties in rewiring, reinvesting hardware resources, and retraining personnel.
3. There are still technical flaws
One of the data transmitted by IP is that the back-end device can no longer obtain the original image. In some applications that need to save the original code stream or have high requirements on the code stream, it cannot be satisfied. Second, the image restoration is a process of encoding and decoding, which brings delay (more than 50ms), which cannot be satisfied in some occasions where high real-time requirements are required.
Looking back at HD-CCTV, it can be said that he has inherent advantages. From the beginning of the design, he considered how to solve the problems brought about by the IP system at that time. In simple terms, there are mainly the following advantages:
1. In the wiring scheme, the results of the old analog system can be used, without rewiring, and the device management can also use the structure of the old analog system. Upgrading from the old system only requires replacing hardware devices (cameras, DVR, etc.) There are other inputs. There is no need to go through the new knowledge training required for system changes.
2. Undistorted reliability: unlike digital monitoring data, it is transmitted in a packetized network after compression, and uncompressed digital data is transmitted on a coaxial cable without distortion.
3. High-definition real-time images: It does not produce compression and packetization during transmission, and does not cause image delay problems like ordinary digital high-definition. It is particularly suitable for real-time monitoring.
4. Provide high-definition images required for intelligent monitoring (IVS): Uncompressed high-definition images provided by HD-CCTV, the integrity of the image is guaranteed, and can provide the best source of high-definition images required for intelligent monitoring.
In fact, the most fundamental benefit brought by HD-CCTV is that it can be smoothly upgraded from the current large number of analog video surveillance solutions to high-definition solutions. This point, whether it is the end user, to the system integrator, or now a large number of analog camera manufacturers, is a way to accept.
Objectively speaking, IP-based standards and HD-CCTV have their own strengths. However, judging from the current pattern of the security industry, the future of HD-CCTV is exciting and looking forward to. Of course, HD-CCTV has only a short time from its introduction to the present, regardless of the introduction of camp members, marketing, and technical difficulties to overcome, it is still in its infancy, for example, the transmission distance of HD-SDI and traditional SDI In comparison, there is still a big gap. HD-CCTV cameras and DVRs have a small selection area and relatively high cost. The marketing efforts are also far from IP high-definition surveillance solutions. However, as more and more technical difficulties are overcome, more and more companies and manufacturers join, and the cost of hardware and solutions will be lower and lower, which will attract more and more attention from the security industry.
Shanghai Fuhan Microelectronics has accumulated many years of experience in the video surveillance industry, has advanced video H.264 encoding technology, and independently developed FH8735 / FH8736 and other special security video compression chips, which is the leader in the domestic security chip R & D industry. On the basis of high-performance compression chips, it provides CIF / D1 / HD IP cameras, DVR, DVS and board cards and other application solutions, providing customers with superior performance industry solutions, and has been recognized by many customers. With the success in the analog monitoring solution, it was the first to provide the HD-CCTV board solution.
Fullhan HD-CCTV board solution
Full Han HD-CCTV board real shot
FH8735 specifications:
FH8735 is a high-performance multi-channel video and audio encoding chip that supports H.264 Main Profile and Baseline Profile. FH8735 has 1 channel 1920 * 1080, 2 channel 1280 * 720 or 8 channel standard definition real-time encoding capabilities, built-in rich video preprocessing functions and various I / O interfaces, which can meet the various needs of video surveillance products and can effectively improve The integration of products and the reduction of system costs provide a powerful encoding power for the high-definition of the video surveillance industry.
Multi-channel video and audio coding
H.264 Main Profile and Baseline Profile
D1 @ 240fps or 1280 * 720 @ 60fps encoding, dual stream
Support frame coding and field coding, I, P, B frame coding, CAVLC and CABAC entropy coding, CBR and VBR
G.711 / G.726 G.71 audio encoding
Video input interface
8 channels BT.656 input
8-channel 54MHz enhanced 656 input
4-channel 54MHz TIme MulTIplexed
QUAD / CIF input
2 channel HD video input interface (up to 3 million pixels)
Video processor and OSD
Deinterlacing, denoising, motion detection, occlusion detection, area masking, watermark overlay, encoding and preview video with independent scaler, text and image OSD
Audio input interface (I2S)
8 stereo audio inputs, 16 mono inputs
Host interface
32-bit PCI, compatible with PCI 2.2 specification, 16-bit HPI
External memory interface
2 sets of DDR SDRAM, 32-bit @ 400MHz
Other interface
JTAG, I2C, UART, SPI, GPIO
Package and voltage
Package BGA456
Voltage: I / O 3.3V, DDR 2.5V, core 1.2V
HD-CCTV board features:
Single chip supports 2 720P30 encoding or 1 1080P30 encoding
1 card supports 4-channel 720P30 encoding
Support CBR and VBR
Support area shielding and motion detection
Support H.264 and Raw YUV data acquisition
Provide driver and API
The image quality of high-definition images is at least 3 times the image resolution of D1. At this time, the excellent coding performance of Fuhan FH8735 provides a strong guarantee for the original image compression and storage of HD-CCTV. The PCI / PCI-E bus can be selected according to the actual application. For applications with high preview requirements, the bandwidth of PCI-E is sufficient to ensure that the high-definition original code stream is transmitted to the HOST terminal for post-processing. It also provides a guarantee for high-quality original images for intelligent analysis.
Introduction
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