Ray-space 數據片內和片間相關性壓縮分析

Ray-space 數據特征分析表明其片內和片間均存在很大相關性并且其數據有明顯的方向
性特征通過最優宏塊分割不同精度的塊匹配和多參考片預測結果分析討論了適合Ray-space數據特點的片內和片間預測技術與傳統的只利用片內相關性的壓縮技術相比利用上述兩類相關性并結合Ray-space 數據方向性特征能進一步提高編碼壓縮效率在獲得相同重建圖像質量下可使基于H.264 的Ray-space 壓縮方法比基于H.263 的方法在碼率上節省50% 比JPEG 的方法節省75%左右.

Analysis of characteristics of Ray-space indicates that there are high intra correlations within
a slice of Ray-space, as well as inter correlations between adjacent slices, and significant directionality characteristic in Ray-space data. Through analyzing optimal macroblock segmentation, block matching with different precision and multi-slices prediction, the techniques of intra-slice and inter slice predications suited to Ray-space compression are discussed. Compared with traditional Ray-space coding techniques only utilizing intra-slice correlations, the Ray-space coding efficiency can be further improved if the two correlations are used combined with the directionality characteristic of Ray-space.
In addition, compared with Ray-space compression method based on H.263, Ray-space compression method based H.264 can save 50% bit rate at the same reconstruction quality of Ray-space, and the economization is about 75% in comparison with JPEG.