直交変換領域における動画像のベクトル・スカラー量子化法

抄録

Vector quantization techniques have been widely investigated because of the remarkable efficiency of vector quantization. This paper describes a hybrid coding method consisting of vector and scalar quantization. Coefficient blocks, obtained by orthogonal transformation of pixel blocks, are first vector quantized, after which residua of the vector quantizing are then scalar quantized. A classification method using vector quantization criteria which improves scalar quantization efficiency, is also presented.