The specific transfer process is:when images sent by the television and sound signals,after digital compression and digital modulation,and formation of digital television signals,then via the satellite,and broadcasting or cable transmission,then the digital television receivers,solute and reconcile the figures as the audio decoder to deal with to restore the original images and sound.
其具体传输过程是:由电视台送出的图像及声音信号,经数字压缩和数字调制后,形成数字电视信号,经过卫星、地面无线广播或有线电缆等方式传送,由数字电视接收后,通过数字解调和数字视音频解码处理还原出原来的图像及伴音。
In this paper,it firstly analyses the development procedure and status in quo of the technology of digital video compression,then describes the all parts of MPEG4 standard,the video coding technology of the MPEG4,such as the shape coding,the motion estimation, and so on.
首先对数字视频压缩技术的发展和现状进行了详细分析,然后重点分析了MPEG4系统各组成部分,着重阐述了MPEG4标准中视频部分的形状编码技术、运动估计与预测等编码技术,最后展望了MPEG4的应用前景。