지상파 방송 환경에서 지상파 UHD 사용자 선택형 입체미디어 서비스를 제공할 때, 비대칭적인 양안 영상의 화질 문제는 항상 대두됐다. 이를 해결하기 위해, 양안 영상의 상관도를 활용한 조건부 대체 알고리즘이 연구된 바 있다. 기존의 알고리즘은 고화질 기준 영상을 시차 보상하여 저화질 부가 영상에 적용하는 방식으로 화질을 개선 시켜왔다. 본 논문은 조건부 대체 알고리즘에 시간적 상관도를 이용하여 더욱 효율적으로 부호화 하는 확장된 알고리즘을 제안한다. 이전 시각에 이미 보상되어 복원된 고화질의 부가 영상을 이용해, 현재 시각의 저화질 부가영상을 움직임 보상한다. 제안하는 알고리즘은 이전 알고리즘에 비해 실사 및 애니메이션 540P, 1080P 클립에 대해 각각 평균 30.5%, 19.8% 의 개선된 비트 절감율을 보였다.
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