APPARATUS AND METHOD OF DETERMINING POWER OF BASE VALUES USED IN VEHICLE APPLICATIONS

• US 20130211671A1
• Filed: 02/01/2013
• Published: 08/15/2013
• Est. Priority Date: 02/01/2012
• Status: Active Grant

• Current Assignee: Continental Automotive Systems, Inc. (Continental AG)
• Original Assignee: Continental Automotive Systems, Inc. (Continental AG)
• Inventors: Joshi, Bijal
• Granted Patent: US 8,849,511 B2
• Time in Patent Office: Days
• US Class Current: 701/36
• CPC Class Codes: G06F 1/0307 Logarithmic or exponential functions G06F1/0314, G06F1/035 take precedence
• CPC Class Codes: G06F 7/00 Methods or arrangements for processing data by operating upon the order or content of the data handled logic circuits H03K19/00
• CPC Class Codes: G06F 7/556 Logarithmic or exponential functions

Abstract

A signal representing a numerical value from a vehicular application is received. A power value is calculated and the power value is a predetermined based raised to the power of the numerical value. The calculating using multiplication and shifting operations and the calculating further accesses a look-up table stored in a memory. The calculated power value is returned to the vehicular application. At the vehicular application, the calculated power value is utilized in a calculation and a result of the calculation is obtained. A parameter of the vehicular application according is altered to the result.

Claims

1. A method of calculating a power value for use in a vehicular application, the method comprising:

receiving a signal representing a numerical value from a vehicular application;

calculating a power value, the power value being a predetermined base raised to the power of the numerical value, the calculating using at least some multiplication and shifting operations, the calculating further accessing a look-up table stored in a memory;

returning the calculated power value to the vehicular application;

at the vehicular application, utilizing the calculated power value in a calculation and obtaining a result of the calculation;

altering a parameter of the vehicular application according to the result.

2. The method of claim 1 wherein the vehicular application is an application selected from the group consisting of a noise removal application, an echo canceller application, and a display application.

3. The method of claim 1 wherein the base is selected from the group consisting of 2, e, and 10.

4. The method of claim 1 wherein the calculating obtains a value for 2^x.y where x and y are integers.

5. The method of claim 4 wherein the calculating obtains 2^x by using a shifting operation and obtains 2^0.y by using the look-up table.

6. The method of claim 1 wherein the application is an echo canceller application and wherein the parameter relates to an amount of echo present in a received signal.

7. An apparatus for calculating a power of, the apparatus comprising:

an interface with an input and output, the interface configured to receive a signal at the input representing a numerical value from a vehicular application;

a memory including and having stored therein a look-up table;

a processor coupled to the interface and the memory, the processor configured to calculate a power value, the power value being a predetermined base raised to the power of the numerical value, the calculation using at least some multiplication and shifting operations, the calculation further accessing the look-up table stored in a memory, the processor further configured to return the calculated power value to the vehicular application at the output;

wherein at the vehicular application, the calculated power value is utilized in a calculation and a result of the calculation is obtained and wherein a parameter of the vehicular application according to the result is altered.

8. The apparatus of claim 7 wherein the vehicular application is an application selected from the group consisting of a noise removal application, an echo canceller application, and a display application.

9. The apparatus of claim 7 wherein the base is selected from the group consisting of 2, e, and 10.

10. The apparatus of claim 7 wherein the calculation obtains a value for 2^x.y where x and y are integers.

11. The apparatus of claim 10 wherein the calculation obtains 2^x by using a shifting operation and obtains 2^0.y by using the look-up table.

12. The apparatus of claim 7 wherein the application is an echo canceller application and wherein the parameter relates to an amount of echo present in a received signal.

13. A computer usable medium having a computer readable program code embodied therein, said computer readable program code adapted to be executed to implement a method of of calculating a power value, the method comprising:

receiving a signal representing a numerical value from a vehicular application;

calculating a power value, the power value being a predetermined base raised to the power of the numerical value, the calculating using at least some multiplication and shifting operations, the calculating further accessing a look-up table stored in a memory;

returning the calculated power value to the vehicular application;

at the vehicular application, utilizing the calculated power value in a calculation and obtaining a result of the calculation;

altering a parameter of the vehicular application according to the result.

14. The computer usable medium of claim 13 wherein the vehicular application is an application selected from the group consisting of a noise removal application, an echo canceller application, and a display application.

15. The computer usable medium of claim 13 wherein the base is selected from the group consisting of 2, e, and 10.

16. The computer usable medium of claim 13 wherein the calculating obtains a value for 2^x.y where x and y are integers.

17. The computer usable medium of claim 16 wherein the calculating obtains 2^x by using a shifting operation and obtains 2^0.y by using the look-up table.

18. The computer usable medium of claim 13 wherein the application is an echo canceller application and wherein the parameter relates to an amount of echo present in a received signal.