실시간 운영체제 기반의 세탑박스나 휴대 단말기에는 값싸고, 파워 소모량이 적은 CPU 를 대부분 탑재하는데, CPU 의 처리속도가 낮아 MPEG-4 미디어 객체의 삽입, 삭제, 변경 명령과 같은 사용자 상호 작용에 의한 장면 변화 프리젠테이션시 화면이 껌뻑이거나 프리젠테이션 속도가 현저하게 떨어지는 경우가 있다. 이에 랜더링되는 객체에 우선 순위를 부여하여, 장면 변화가 있을 때마다 전체 장면을 다시 프리젠테이션할 필요없이, 초기 장면에서 변경된 객체들만 우선 순위에 따라 다시 랜더링하여, 랜더링되는 객체수를 최소화하는 객체 우선 순위 컴포지션 방법을 제안한다. 객체에 우선 순위를 부여함으로써 프리젠테이션시 랜더링 순서를 임의로 변경할 수 있어 자유롭게 장면을 구성할 수 있고, 화면이 껌뻑이지 않고 속도가 빨라 자연스러운 프리젠테이션을 가능하게 한다.
KSP Keywords
Mpeg-4
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