High-speed ball: HD integrated movement

High-speed high-speed ball core core components - "high-definition integrated movement"

After years of development of the integrated camera movement, the design of its core technology integrated lens and auto-focus algorithm has been quite mature.

The standard of high-definition integrated lens quality is roughly divided into: optical performance, stability and consistency of key components. The optical performance mainly refers to the resolution of the lens under various optical multiples. Of course, it also includes the seriousness of ghosting, purple fringing, and dispersion. The key components mainly include the aperture, motor, and filter switching components.

After entering the era of high-definition, these technical problems have been resolved quickly. Currently, different products represented by Japanese lenses, Taiwan lenses, and domestic lenses have been formed. Japanese lenses generally perform well in terms of optical performance and stability, but their prices are relatively high. Taiwan's lenses are relatively cost-effective, but their optical performance, especially high-resolution image performance, is insufficient; while domestic manufacturers' one-camera lenses do not perform well in terms of stability and consistency. ideal.

In terms of autofocus algorithms, several major solutions have also been formed. For example, HD autofocus solutions represented by TI's DM368, FPGA and ASIC. The FPGA solution belongs to the hardware circuit implementation mode, and the stability is high. The effect and speed of autofocus are fast. The solution of the DM368 is a software system combined with the implementation of the hardware register. Its autofocusing effect is relatively good, but the speed and stability The sexual aspect needs to be tested; the ASIC solution is implemented by the hardware circuit and the simple software method, and the stability is high, but the development flexibility of the movement manufacturer is greatly limited, and it is difficult to improve the effect and speed of the autofocus.

Core Algorithm - "Efficient Stream Control"

After years of development, video coding technology has made great strides in MPEG-1 (MP3, VCD), MPEG-2 (DVD, SVCD), and MPEG-4 video compression efficiency and image quality.

In particular, the H.264 technology developed from MPEG-4 Part10 has become the mainstream coding technology in the current surveillance market with its high image compression efficiency and good image quality. In recent years, H.264 technology has continued to evolve. From the initial Baseline Profile, only I/P frames were provided. Only progressive scan and CAVLC (content-based adaptive variable length encoding) are supported. The mainstream MainProfile has not only been provided. I/P/B frames, while also supporting progressive and interlaced scanning, and multiple encoding methods CAVLC (content-based adaptive variable-length encoding) or CABAC (content-based adaptive binary arithmetic encoding), compared to CABAC CAVLC can improve compression efficiency by at least 10%-15%.

At present, products based on H.264 Main Profile can provide compressed video of 3M bitstream at 720P resolution and compressed video of 6M bitstream at 1080P resolution under the premise of ensuring image quality.

The H.264 compression coding technology will be further developed. It will also be possible to implement HighProfile's compression coding capability on HD high-speed balls. HighProfile will provide higher compression efficiency and better image quality while also providing highly lossless video coding. To meet the needs of platform video intelligence analysis.