JVET은 VVC 표준화 완료 후, 새로운 비디오 압축 표준화를 위한 기술 탐색을 진행하고 있으며 이를 위한 탐색모델 소프트웨어로 ECM(Enhanced Compression Model)을 개발하고 있다. 현재 ECM에는 새로운 화면내 예측 부호화 기술의 하나로 TIMD (Template-based Intra Mode Derivation)가 채택되어 있다. TIMD는 현재블록 주변의 복원된 샘플들로 구성된 템플릿(template)과 MPM(Most Probable Mode) 리스트를 사용하여 화면내 예측 모드를 유도하는 기술이다. 본 논문은 TIMD의 예측 모드 결정을 위한 비용함수인 SATD(Sum of Absolute Transformed Difference) 계산에서 현재블록과 가까운 템플릿에 많은 가중치를 적용하여 보다 적절한 예측 모드를 유도하는 방법을 제안한다. 실험결과 ECM-10.0 대비 휘도성분에서 0.03% BD-rate 이득을 확인하였다.
KSP Keywords
Compression model, Most Probable Mode, Sum of Absolute Transformed Differences(SATD), intra mode, template-based
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