Hierarchical coding of super high definition images with subband+multistage VQ

A subband based hierarchical coding algorithm is proposed and an examination is made of its coding performance for super high definition images. Several quadrature mirror filters are examined from the viewpoints of reconstruction accuracy, coding gain, and low pass characteristics. The two-stage vector quantization scheme is also introduced to control quantization accuracy in each subband. Hierarchical image reconstruction and efficient bit-rate compression can simultaneously be obtained by using the proposed algorithm.<
>