차세대 비디오 압축 표준기술에 대한 요구가 지속적으로 증가함에 따라, JVET은 최신 비디오 코덱 표준인 VVC 이후의 성능향상 가능성을 탐색하기 위해 ECM(Enhanced Compression Model) 참조 소프트웨어를 개발하면서 다양한 후보 기술을 검증하고 있다. ECM에서 화면내 예측 중 참조샘플이 가용하지 않는 경우 최근접 샘플을 복사하는 기존 패딩(padding) 방식은 예측 성능을 저하시킬 수 있다. 본 논문에서는 이러한 한계를 해결하기 위해 참조샘플을 패딩하는 기존 방식을 블록벡터(BV: Block Vector) 기반 참조샘플로 대체하는 기법을 제안한다. 제안하는 BV 기반 참조샘플 생성 기법을 ECM 18.0에 구현하였으며, 실험결과 ECM-18.0 대비 0.01% BD-rate 절감의 성능향상을 보였다.
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