High-definition IP chip-level solution based on Hass chips

Market Overview In 2011, as the outbreak of high-definition products in the surveillance field, the words “HD” and “IP” became well-deserved hot words. More and more manufacturers have joined the field, making the cake of HD IP bigger and bigger. Digital HD network cameras have been gradually recognized by customers through concept and promotion. Digitalization, intelligence, high-definition, and networking of security products are an irreversible trend. HD products on the market are springing up before users. Currently, there are many high-definition IP solutions on the market, including Hass, TI, NXP, TRIDENT, TECHWELL, Zhiyuan and many other chip manufacturers have put forward their own characteristics of high-definition IP solutions, how to choose their own high-definition IP The solution has become a topic of great concern to everyone.

High-Definition IP Solution Although there are many solutions for high-definition network cameras on the market, from the perspective of architecture, there are two basic architectures:

(1) CCD/CMOS sensor (SENSOR) is used as the image acquisition equipment, and the SOC chip of the ISP is provided. This type of solution has obvious cost advantages. The imaging effect of this solution mainly depends on the integrated ISP of the chip manufacturer (eg 3A, wide Such effects as dynamic and etc.; The obvious advantage of adopting such a scheme is that such programs are more flexible and can be customized according to the features of the program, such as capture, low frame rate, and the like.

(2) Front-end camera modules (movements such as Hitachi's SC110 and SONY's H11) are used as image acquisition devices, supporting an ASIC or DSP for encoding compression and transmission. These types of solutions are relatively expensive due to the use of professional imaging. The module, the original image effect is good, so the effect of the entire IPC product depends on the effect of the supporting compression transmission module. The main indicator is the clarity and real-time performance of the compressed image.

In addition to the above architecture, for security manufacturers, according to different market needs and product positioning to choose solutions that meet the direction of its own product development, is the confusion faced by each device manufacturer. When choosing a plan, consider the following aspects:

1, storage and bandwidth usage:

The increase in image resolution will inevitably consume more bandwidth and storage space. Take 1920X1080@30 as an example, and use H. 264 encoding algorithm, in order to ensure clarity, the code stream needs to be controlled at about 6Mbps, so that the hourly storage space needs 2.7GB. In an ordinary LAN environment, 100M bandwidth can only reliably transmit 10 encoded video, and a 1T hard disk can only store about 400 hours. How to balance storage and bandwidth is a challenge for vendors.

2, HD lens performance:

The improvement of image resolution has raised new requirements for lens precision and level control. The resolution of two million network cameras is ten times more than that of PAL, and the technology used in ordinary high-definition DC or DV The high cost of security products is not conducive to the promotion of network HD cameras. How to reduce the threshold of the imaging system is a key factor in the development of network HD cameras.

3, 3A control technology:

On the analog camera, various manufacturers have relatively perfect 3A control technology such as auto focus, white balance, and automatic exposure, but the application of these technologies on digital high-definition cameras is relatively weak, and 3A control is very important for high-definition image quality. . At present, there are few accumulated experiences in the control algorithms involved in these technical fields. Especially in high-definition systems, the increase of the resolution will increase the corresponding algorithm overhead. How to ensure that these control algorithms are completed in real time is very important.

Chip Solutions Hass is a chip design company specializing in digital media, 3G terminals, and data communications. In the field of digital media, it has introduced HD network monitoring chips and solutions. Currently, the most mainstream HD IP solution on the market is non-History. From Hi3512, Hi3515 to the latest Hi3516, Hass provides a complete set of high-definition solutions. Taking the Hi3512 as an example, this solution is based on the ARM9 processor core and the high-performance communication media processor of the video hardware acceleration engine. It is highly integrated, programmable, and supports H. The advantages of multi-protocols such as 264 and MJPEG, where the video processing unit can support H. 264 Main Profile, Baseline, Profile, MJPEG, JPEG and other protocols implement codec; support 1.3M Pixels @ 30fps, support up to 3 million pixel JPEG capture; video processing unit can also support dual-stream encoding and other functions. Hi3512 solution rich peripheral interface to meet the needs of equipment specifications, reduce overall BOM costs.

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