计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2010年
3期
142-144,147
,共4页
JPEG2000%嵌入式块编码%回归分析%预测截断
JPEG2000%嵌入式塊編碼%迴歸分析%預測截斷
JPEG2000%감입식괴편마%회귀분석%예측절단
JPEG2000%embedded block coding%regression analysis%prediction truncation
针对JPEG2000中基于率失真优化后压缩处理的嵌入式块编码算法所存在的运行复杂、浪费大量编码时间等问题,提出了一种有效提高编码效率的方法,即基于回归分析的嵌入式块编码预测截断算法.该算法根据多元线性回归分析得到的回归方程来预测截断点,避免了对将被截断的位平面进行扫描编码,并舍弃了复杂耗时的率失真计算与搜索,有效地加快了嵌入式块编码算法的运行速度.实验结果表明,算法获得了可观的编码速度提升收益.
針對JPEG2000中基于率失真優化後壓縮處理的嵌入式塊編碼算法所存在的運行複雜、浪費大量編碼時間等問題,提齣瞭一種有效提高編碼效率的方法,即基于迴歸分析的嵌入式塊編碼預測截斷算法.該算法根據多元線性迴歸分析得到的迴歸方程來預測截斷點,避免瞭對將被截斷的位平麵進行掃描編碼,併捨棄瞭複雜耗時的率失真計算與搜索,有效地加快瞭嵌入式塊編碼算法的運行速度.實驗結果錶明,算法穫得瞭可觀的編碼速度提升收益.
침대JPEG2000중기우솔실진우화후압축처리적감입식괴편마산법소존재적운행복잡、낭비대량편마시간등문제,제출료일충유효제고편마효솔적방법,즉기우회귀분석적감입식괴편마예측절단산법.해산법근거다원선성회귀분석득도적회귀방정래예측절단점,피면료대장피절단적위평면진행소묘편마,병사기료복잡모시적솔실진계산여수색,유효지가쾌료감입식괴편마산법적운행속도.실험결과표명,산법획득료가관적편마속도제승수익.
To solve the problems of execution complexity and time waste in compression process induced by Post Compression Rate Distortion(PCRD) Optimization in embedded block coding in JPEG2000,this paper proposes an effective method to promote coding efficiency-embedded block coding with prediction truncation based on regression analysis.This algorithm predicts the trun-cation points based on regression formula derived from linear regression analysis.It avoids scanning and encoding the bit-planes that can be truncated,and discards the time-consuming rate-distortion truncation processing,so that the algorithm is able to speed up the compression process.The experiment results show the considerable speed promotion.
