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. 07, 1995
Filed:
Sep. 29, 1993
David J Anderson, Ann Arbor, MI (US);
Donghoon Lee, Ann Arbor, MI (US);
David L Neuhoff, Ann Arbor, MI (US);
Omar A Nemri, Ann Arbor, MI (US);
Other;
Abstract
The digitally sampled data is split into a plurality of subbands each covering a different frequency range. The subbands are each individually expanded to normalize the energy in each band and the subbands are converted by FFT to the frequency domain and the magnitude and phase portions are processed by different techniques based on psychoacoustic principles. Magnitude data are processed by tree structured vector processing to develop code books for each subband which are unique to each song. Phase data are uniformly quantized with dynamic bit allocation used to increase resolution on transient passages.