| 摘要 |
Provided are a versatile inverse quantization circuit which performs inverse quantization operable for various encoding systems by a single circuit, an inverse quantization method, and an image reproducing apparatus. A first multiplier generation unit (10) generates a first multiplier M1, a second multiplier generation unit (20) generates a second multiplier M2, a shift quantity generation unit (180) generates shift quantity data SF indicating a bit shift quantity, a multiplication unit (140) multiplies quantized coefficient data CD by the first multiplier M1 and the second multiplier M2, a shift unit (170) carries out bit shift operation in accordance with the shift quantity data SF, at least one of the multiplication unit (140) and the shift unit (170) determines whether or not to perform operation depending on the encoding system, and at least one of the first multiplier generation unit (10), the second multiplier generation unit (20) and the shift quantity generation unit (180) determines a value to be generated or a way of generating the value depending on the encoding system. |
