Abstract: |
This invention relates to an inverse-quantization method and a device, in which, the method includes: judging the type of inverse-quantization to determine the second multiplier v, that is an constant or inverse-quantitative parameter or the result of inverse-quantitative parameter's calculating, and the first multiplier 'u' is the inverse quantized index or its modulus., Calculating the product of u and v to get m to obtain the exchange coefficient of the inverse-quantization by inverse-quantization with 'm' or the formula of mod 'f' equals 'm' plus 'y' is much greater than 'z'( |F'|=(m+y)>>z ). The device consists of obtaining and calculating modules for inverse-quantitative parameter, three multi-route selectors, a multiplier, a summator, a shifter and a saturation arithmetic module. |