適應性移動補償的空間-時間域之解交錯演算法

Spatial-Temporal De-interlacing Algorithm in Adaptive Motion Compensation System

楊大宗(Ta-Tsung Yang)

指導教授 ： 章明 ； 范憶華

中原大學/工學院/光機電及資電控產業研發碩士專班/碩士(2007年)

https://doi.org/10.6840/cycu200700310

摘要

隨著科技的進步，影像傳送與儲存方式也在變革，傳統類比式影像由交錯掃瞄方式改用連續掃瞄在技術上已日漸成熟。連續掃瞄所提供的高品質影像讓多媒體電腦與數位電視紛紛使用做為顯示的方式。然而目前仍有許多影像用交錯掃瞄方式紀錄，因此將交錯掃瞄轉換成連續式掃瞄的解交錯掃瞄線演算法便成為一個重要的課題。
現今的電視訊號格式，以交錯式掃描作為電視畫面的視訊傳輸與儲存的主要格式，這種播放格式會產生不良的視覺效果，而且會產生畫面抖動、閃爍、爪痕現象，這些現象都是由於交錯掃描所造成的。隨著視訊系統的技術快速發展，解交錯式掃描被提出，它將交錯掃描的格式換成循序掃描的格式，它可以解決交錯式掃描所產生的缺點，並且逐漸廣泛的被採用。適應性移動的解交錯演算法已經被廣泛應用在許多商用的產品中。然而其在移動區域的畫質仍有待提昇，透過沿著移動方向的內插，移動補償與移動估測解交錯演算法可以提昇移動區域的解析度，因而成為下一代解交錯演算法的主要架構。然而當移動估測不正確時，內插出的畫面中出現的錯誤變成移動估測解交錯演算法的主要缺陷，本篇論文中提出的適應性移動補償解交錯演算法可以有效提昇移動區域的畫面，在視覺上也提高了畫面的解析度。
關鍵字:交錯掃瞄、循序掃瞄、解交錯、移動補償、移動估測。

關鍵字

移動估測 ； 交錯掃瞄 ； 解交錯 ； 移動補償 ； 循序掃瞄

並列摘要

The interlaced scanning process technique is widely applied in current TV systems to reduce both of the bandwidth requirement and the large area flicker. However, the interlaced scanning produces line flicker and other artificial effects. In order to provide high vision quality image for the display of the multimedia computer and digital television, the de-interlacing algorithm is proposed for converting the interlaced signals to the progressive signals.
The current NTSC system uses the interlaced scan technique to display video sequence. However, the technique creates undesirable visual artifacts and makes the lines flicker, twitter, and crawl as results of the interlaced scan. Moreover, the new display systems support progressive scan in order to reduce artifacts in display and improve the quality of the picture. Thus, deinterlacing techniques are important to the quality of display. Motion adaptive de-interlacing has been used widely in various kinds of commercial products but the picture quality is still not good at motion area, Motion compensated and Motion detection de-interlacing solves this problem by interpolation along the motion trajectory and has become the next generation technology for de-interlacing. However, it suffers visible artifacts caused by incorrect motion detection. This thesis presents a adaptive motion compensated de-interlacing algorithm can be effective promote motion the frame of the area, have improved analysis degree of the frame too on the vision.
Key words : Interlace scan、Progressive scan、De-interlacing、Motion compenstaion、Motion detection.

並列關鍵字

Motion compenstaion ； De-interlacing ； Progressive scan ； Motion detection ； Interlace scan

參考文獻

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