Introduction to Nancy Codec compression technology

Most of the compression technologies currently used in the video field belong to technologies similar to the MPEG series. Although MPEG-4 or H.264/AVC has achieved a higher compression ratio, it is still difficult to implement video transmission using this compression method on a 2.5G or even 2G mobile communication network. Therefore, in general, mobile communication Video services are mainly locked in the services that will be provided after the popularity of 3G. However, if you can immediately provide video services on a 2G or 2.5G network, it will bring huge benefits to the telecom operators, and will also enable mobile users to enjoy more and more mobile services. Nancy Codec technology was developed for this purpose.

Nancy Codec is mainly developed by Japan Office Noa. Currently, in addition to Japan J-Phone and NTT DoCoMo, there are also major telecom operators in Asia and Europe, including China Mobile Communications. The stage of testing or research. Traditional video compression requires a high-speed CPU or a dedicated processing chip, which not only takes up space, but also increases power consumption. Relatively speaking, software solutions like Nancy Codec do not need high-speed CPUs or dedicated processing chips, so they can address the mobile communication market's demand for mobile devices with video processing capabilities.

Nancy Codec is mainly developed using the concept of SMSP (Structure Meta Sale Polygon). The principle is to divide the action image into many models of different shapes and sizes, and then compress it. Because of the new simple four algorithm, Motion detection (MoTIon EsTImaTIon) and discrete cosine transform (DCT) are required, so the amount of calculation is small and the transmission rate is fast.

Nancy Codec is a compression technology with considerable advantages. Because Nancy Codec implements video compression in software, the hardware processing power is only 10% of MPEG4, and the operation speed is 1 times faster than MPEG4. The compression ratio is MPEG4. One of the points, so the video can be transmitted using the existing mobile communication network. A number of companies have launched DSP chips supporting Nancy Codec, including Texas Instruments and Epson. There are also a lot of support from telecom operators, including Japan J-phone and China Mobile. However, although Nancy Codec does have advantages in developing applications, it also has some problems: Because Japan's OFFICE NOA company owns this technology exclusively, it is not technically open, so it is not conducive to further development of the technology. On the one hand, it is possible to cause difficulties in promotion and application because of conflicts of interest between the parties.

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