期刊名称：International Journal of Electronics and Computer Science Engineering
电子版ISSN：2277-1956
出版年度：2012
卷号：1
期号：3
页码：1321-1327
出版社：Buldanshahr : IJECSE
摘要：Compression basically means reducing image data. As mentioned previously, a digitized analog video sequence can comprise of up to 165 Mbps of data. To reduce the media overheads for distributing these sequences, the following techniques are commonly employed to achieve desirable reductions in image data Reduce color nuances within the image, reduce the color resolution with respect to the prevailing light intensity, Remove small, invisible parts, of the picture, Compare adjacent images and remove details that are unchanged between two images. The first three are image based compression techniques, where only one frame is evaluated and compressed at a time. The last one is or video compression technique where different adjacent frames are compared as a way to further reduced the image data. All of these techniques are based on an accurate understanding of how the human brain and eyes work together to form a complex visual system. As a result of these subtle reductions, a significant reduction in the resultant files size for the image sequences is achievable with little or no adverse effect in their visual quality. The extent, to which these image modifications are humanly visible, is typically dependent upon the degree to which the chosen compression technique is used. Often 50% to 90% compression can be achieved with no visible difference, and in some scenarios even beyond 95%. In this paper variable block sizes in motion estimation process is used for video compression
关键词：Residual energy maps; DCT; Spatial Correlation; H.264 standard; High efficiency Video Codec
