The analysis of several high-definition programs Shiguo 【explosion-proof camera】

Date：2012-12-24

Although HD pilot applications in many industries, but also in the explosion monitoring budding, there are a lot of customers come to ask, but how long it takes to achieve scale unknown, and even HD launched a large number of different markets and customers will inevitably exist for different quality requirements. In this regard, chip makers have full consideration, we have introduced HD-SDI, 960H and other high-definition programs, and ultimately for users, integrators to provide a variety of options. Three programs have their own characteristics, how to find a more economical solution requires relatively excessive discretionary. We Shiguo proof camera also careful selection of these three scenarios, careful experiments, a careful and seek a more reasonable solution, is the enterprise with clients to achieve win-win situation.

Shiguo in the beginning, because the popularity of the network, the network must eventually become mainstream high-definition, high-definition is no doubt that the future trend, but where on the road towards HD, the industry is filled with a variety of different sounds. The first launch of Network HD , because real-time bandwidth, storage , compatibility , cost and other problems which are difficult in a short time -scale application , the promotion coverage rate failed to meet industry expectations. How to transition from D1 to the 720P, 1080P million or even higher level, for many users, are looking for a more economical transition program.

A, IP solutions

IP Megapixel will undoubtedly become the most mainstream choice, because computational complexity is very large, the performance of the chip can be achieved indeed no end.

The end of the core IP cameras dominate video compression chip CODEC output after the transfer conditions, including image flow , stream number provided , processing CPU speed, screen delay difference , video frame rate speed and the amount of heat and so on.

Shiguo chief engineer Huangzeng Jun said that, CODECSoC these aspects of performance are very different from the past, manufacturers in the fixed code changes in stream flow and compression ratio will have progressed past the 720P stream up 4Mbps, and even up to 1080p 8Mbps, now IP million at 720p @ 30fps can be pressed at 2-3Mbps, 1080p @ 30fps pressure in the 6Mbps or less, greatly reducing the transmission load.

From the chip supply perspective, Hass Hi3516 chip launched on upgrades to improve its effectiveness , so that TI is no longer a high-end IP camera million only choice , whether there will be more manufacturers choose Hass is still worthy of attention .

According to an important observation chip business, we understand that IP million cameras on the market by the image sensor, codecs and compression chip to match the structure has the following major programs.

• Sony / OV / Aptina Hass (Hi3516, Hi3517);

• Aptina / PIXIM Hass (Hi3507).

• Aptina / PIXIM Fullhan micro / Hass (Hi3507);

• Sony / OV / Aptina TI / Ambarella ( or Panasonic , Axis , Sony and other proprietary chip ) ;

Of course, Moore's Law has been in the semiconductor to improve performance, security core chips have been used to improve and continue to have a new program introduced , chip makers are constantly adjusting product planning, according to market demand also has classic scheme, but any changes will produce . These four programs only on the current observation purposes. Relatively speaking, the latter two have four options above cost advantages, OEM products have applications in many. Shiguo proof cameras are screened carefully one by one.

Two, HD-SDI program

Better quality, lower or even negligible delay, and good compatibility with existing analog systems, HD-SDI no IP background for most contractors, integrators themselves, causing a number of chip vendor 's attention, Ambarella , TI, Hass other manufacturers have added HD-SDI chip market competition , Gennum is no longer thriving , prompting the HD-SDI chip solutions appear in the structure and cost of competitive differentiation .

The ISP program launch, but also to SDI camera manufacturers more options on the component, to better reflect the difference. Emphasize here is that we can not observe the chip stays on a single chip , but the overall chip solution , you need to observe the assembly of the match, with SDI camera perspective, chips, sensors and ISP (DSP) jointly affect their product form and cost. Comprehensive publication on all major chip consultant Zhang's observations, we learned that the current market mainly in the following four kinds of HD-SDI chip solutions.

• CMOS / CCD ISP Encoder

The first program uses a dedicated ISP processing chips and coding process , the program more flexible ISP using a dedicated chip stability , to ensure the quality of the image , but not the real definition VLDS @ 60fps;

• CMOS / CCD (ISP CODEC)

The second program uses an integrated ISP's encoder chip , the flexibility of the program inferior to the first option , and integrated processing chip ISP stability is high, but the image quality is generally high cost ;

• CMOS / CCD FPGA

The third scenario using FPGA chip, such as signal processing and encoding functions to achieve the most flexible solution , but poor stability, highest cost, image quality is difficult to guarantee ;

• CMOS / CCD ISP SDITx

The fourth program uses a dedicated ISP processing chip and SDI transmitter chip, the program more flexible, using a dedicated ISP chip stability, to ensure the quality of the image , providing HD @ 60fps.

Thus, all with both advantages and disadvantages , more excellent quality HD-SDI is a major bright spot, from which can be seen on -chip solution , HD-SDI in many ISP's are processed by a separate chip , rather than integrated into the cODEC cODEC on . Shiguo engineers compare the value of this program, because the costs and effects, there is relatively good value for money for the company and the customer can bring a better advantage.

Three, 960H program

Was known as the analog HD 960H program Techwell and Sony Corporation jointly by the definition and development is seen as an interim solution while HD attracting much attention . 960H internal components use more SonyEffioDSP SonyHADSensor, Effio divided into P, S, E three, can be used with general functionality SonyHAD-II, or with WDR / BLC / DN function SuperHAD-II, or with WDR BLC DN Lowlight capabilities ExviewHAD -II.

Shiguo chief engineer Huangzeng Jun said that , EffioE, S, P led chip makers 960H of DSP, and 960HEncoder/Decoder production inputs , 960H camera , Hong DSP market turmoil , and to WDR / BLC / DNR demand for the standard configuration will lead to the DSP (ISP) sales. You can see, 960HDSP with 960HENCODER/DECODER is a relatively new development chips, and 960H competition is seen as more DSP performance competition.

However, 960H proof camera technology and applications products there are still many deficiencies. Huang Zengjun example, 960H (976x494NTSC) format is currently not supported LCD can not display all the LCD monitor. CRT monitors can complete display better, but has less production , 960H losses under the analog part of the screen video , which may affect the integrity of the evidence . Therefore 960H products and applications in the backend there is still many problems to be resolved. WHO country also make every effort to overcome these technical problems, we can agree to create a national high-definition world proof cameras.