计算机工程
計算機工程
계산궤공정
COMPUTER ENGINEERING
2010年
7期
233-235,238
,共4页
单宝堂%王豫生%沈庭芝%吕建民
單寶堂%王豫生%瀋庭芝%呂建民
단보당%왕예생%침정지%려건민
全零检测%运动估计%小菱形搜索%峰值信噪比
全零檢測%運動估計%小蔆形搜索%峰值信譟比
전령검측%운동고계%소릉형수색%봉치신조비
Detection of All-Zero(DAZ)%motion estimation%small diamond search%Peak Signal to Noise Ratio(PSNR)
为减小H.264/AVC编码器中的运动搜索时间并降低计算量,提出一种基于全零检测技术的改进小菱形搜索算法.在搜索中心及周围4个点进行匹配计算,计算过程中插入全零检测,提高搜索速度.与其他几种典型运动搜索算法的比较结果表明,该算法在保证一定峰值性噪比的条件下,能降低运动搜索次数、减少编码时间,适用于背景相对固定或中低运动强度的视频序列.
為減小H.264/AVC編碼器中的運動搜索時間併降低計算量,提齣一種基于全零檢測技術的改進小蔆形搜索算法.在搜索中心及週圍4箇點進行匹配計算,計算過程中插入全零檢測,提高搜索速度.與其他幾種典型運動搜索算法的比較結果錶明,該算法在保證一定峰值性譟比的條件下,能降低運動搜索次數、減少編碼時間,適用于揹景相對固定或中低運動彊度的視頻序列.
위감소H.264/AVC편마기중적운동수색시간병강저계산량,제출일충기우전령검측기술적개진소릉형수색산법.재수색중심급주위4개점진행필배계산,계산과정중삽입전령검측,제고수색속도.여기타궤충전형운동수색산법적비교결과표명,해산법재보증일정봉치성조비적조건하,능강저운동수색차수、감소편마시간,괄용우배경상대고정혹중저운동강도적시빈서렬.
To decrease the computation and the motion estimation time in a H.264/AVC coding converter, this paper presents a new improved small diamond search algorithm, which is based on the Detection of All-Zero(DAZ). In the matching computation of the search center and its near four points, DAZ is used to increase the searching rate. The method is compared with several other typical motion search methods. Keeping with certain Peak Signal to Noise Ratio(PSNR) performance, the improved small diamond search method decreases the searching points and shortens the coding time obviously. The improved small diamond search method fits for the video sequence in a stationary or middle-small motion-intensity background and the application result is good.
