The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 2010
Filed:
Nov. 30, 2004
Methods for selecting an initial quantization step size in audio encoders and systems using the same
Applicants:
Ravindra Ramkrishna Chaugule, Pune, IN;
Sachin P. Ghanekar, Pune, IN;
Inventors:
Ravindra Ramkrishna Chaugule, Pune, IN;
Sachin P. Ghanekar, Pune, IN;
Assignee:
Cirrus Logic, Inc., Austin, TX (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10L 19/12 (2006.01); G10L 19/02 (2006.01); G10L 19/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of performing quantization in an audio encoder includes determining a number of bits available in a frame of encoded audio data. Determinations are also made for the maximum transform coefficient value and a distribution of transform coefficient values across the transform coefficient spectrum being encoded. A an estimate for an initial quantization step value is determined from the number of available bits in the frame, the maximum transform coefficient value, and the distribution of coefficient values across the coefficient spectrum.