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:
Sep. 25, 2007
Filed:
Oct. 15, 2004
Ralf Geiger, Wuembach, DE;
Thomas Sporer, Fuerth, DE;
Karlheinz Brandenburg, Erlangen, DE;
Juergen Herre, Erlangen, DE;
Juergen Koller, Wuembach, DE;
Joachim Deguara, Ilmenau, DE;
Ralf Geiger, Wuembach, DE;
Thomas Sporer, Fuerth, DE;
Karlheinz Brandenburg, Erlangen, DE;
Juergen Herre, Erlangen, DE;
Juergen Koller, Wuembach, DE;
Joachim Deguara, Ilmenau, DE;
Abstract
A time-discrete audio signal is processed to provide a quantization block with quantized spectral values. Furthermore, an integer spectral representation is generated from the time-discrete audio signal using an integer transform algorithm. The quantization block having been generated using a psychoacoustic model is inversely quantized and rounded to then form a difference between the integer spectral values and the inversely quantized rounded spectral values. The quantization block alone provides a lossy psychoacoustically coded/decoded audio signal after the decoding, whereas the quantization block, together with the combination block, provides a lossless or almost lossless coded and again decoded audio signal in the decoding. By generating the differential signal in the frequency domain, a simpler coder/decoder structure results.