INVERSE QUANTIZER FOR DIGITAL VIDEO CAMERA

摘要

PURPOSE: An inverse quantizing apparatus of a DVC(digital video camera) is to optimize an inverse quantizing function to be fit for a specification of the DVC, thereby simplifying a circuit construction of the apparatus. CONSTITUTION: A state controlling portion(100) controls an entire timing to perform an inverse quantizing operation. An area number output portion(110) counts input VLD data in a DCT(discrete cosine transform) block unit according to control of a state controlling portion. A DC register(140) stores a class number and an inverse quantizing number according to control of a state controlling portion. An amp register(130) stores amp data according to control of a state controlling portion. A run generating portion(120) generates 0 according to input run data. An inverse quantization deciding portion(150) receives the area number output from the area number output portion, and the class number and the inverse quantizing number output from the DC register to decide an inverse quantizing step and then output the step according to control of the run generating portion.