Patent ID: 6687726
Filing Date: 2004-02-03
Classification: G06F,H04N

Abstract:
An apparatus for multiplication by constant factors, comprising:(a) a table having an input for inputting a code of an input variable quantization scale, a first output for outputting, a factor element of a multiplier and a second output for outputting a shift element of said multiplier; (b) a bit-reduced multiplication device having a first input for receiving the factor element, a second input for receiving a multiplicand, and an output for outputting a multiplication result; and (c) a shift device having an input connected to said output of said bit-reduced multiplication device and having a control signal input; said shift device receiving the shift element as a control signal with the number of shift steps from the second output of said table via said control signal input; and said shift device outputting a final multiplication result of a multiplication of the multiplicand with a the respective multiplier.