文档介绍：????????????I???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????, ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????3G?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????YUI????????????????DCT????????????????????????????????????????????????????????????????????????????VQ???????????????????1?????Symbian????????????????????????????????????????LBG???PNN?????????????????LBG?PNN ??????????????FS?EENNS???IEENNS??????????IEENNS?????????????2????????????????????????????????????????????????????YIQ????????????????DCT???????????????????????????????????????JPEG?VQ??????????????????????3?????????????????????Symbian Os????????????Nokia??????????????????????????????????????????????????II??????????????VQ??????????????????????????????????????????????????????????????????? Abstract III Abstract Vector quantization is a highly efficient pression techniques,as pression ratio is large and simple it was widely used in decoding the pression, voice coding and other fields. Digital watermarking technology which embedded the serial number, text, binary images and other information into the multimedia data, multimedia information is aimed at tracking and copyright protection of copyright, especially in the image, the video has been widely used as multi-media information security area of research is a key point. The study of digital watermarking which base on vector quantization, that is, to study in pressed domain digital watermarking . Vector quantization of digital watermarking technology basic idea is to match the input vector set to use the code word index table transfer of copyright protected information. With the upgrading of digital products, high-definition digital e into the daily life,