0.75-power computing apparatus and method and program for use therewith
AssigneeNEC Corporation
InventorYuichiro Takamizawa
Life of this patent
Estimating the term…
Abstract
To provide an audio signal quantization device in which an amount of arithmetical operation can be reduced. A 0.75-power computing apparatus includes: an inverse number computing unit; a first −0.5-power computing unit; a multiplication unit; a second −0.5-power computing unit; and a program storage medium that is connected to an outside, whereby a program stored in the program storage medium is executed to compute the 0.75-power in a quantization computing expression. The inverse number computing unit, the first −0.5-power computing unit, the multiplication unit, and the second −0.5-power computing unit operate in such a manner that a multiplication between an infinity and zero which leads its operation result to an indefinite value is inhibited.
Claims9
A 0.75-power computing apparatus, comprising:
- inverse number computing means for computing an inverse number of an input value;
- first −0.5-power computing means for computing the −0.5-power of said input value;
- multiplication means for computing a product between a computed result of said inverse number computing means and a computed result of said −0.5-power computing means;
- and second −0.5-power computing means for computing the −0.5-power of a computed result of said multiplication means.
The 0.75-power computing apparatus according to claim 2, being used for a coding method employing the computation of the 0.75-power.
The 0.75-power computing apparatus according to claim 3, being used for an audio signal quantization device quantizing a transformed audio signal by using the computation of the 0.75-power.
A 0.75-power computing method, comprising:
- a first step for computing, on a computer, an inverse number of an input value;
- a second step for computing, on the computer, the −0.5-power of said input value;
- a third step for computing, on the computer, a product between a computed result at said first step and a computed result at said second step;
- and
- a fourth step for computing, on the computer, the −0.5-power of a computed result at said third step.
A program product having machine readable program code for performing 0.75-power computing, the program code, when executed, causing a machine to perform the following steps:
- a first step for computing an inverse number of an input value;
- a second step for computing the −0.5-power of said input value;
- a third step for computing a product between a computed result at said first step and a computed result at said second step;
- and
- a fourth step for computing the −0.5-power of a computed result at said third step.
Dependencies are inferred from the claim text.