A DCT-based hierarcical finite state vector quantization for image coding

영상 부호화를 위한 이산 여현변환 기반의 계층적 유한 상태 벡터 양자화 기법

In this paper, we introduce a new DCT based hierarchical finite state vector quantization. Our proposed scheme uses difference of DCT coefficients to find a representative vector, and classifies image blocks into different hierarchical levels depending on their structural characteristics, and uses different coding rates and different number os state codebooks at each hierarchical levels. As a result, we obtained reconstructed images having satisfiable quality objectively.