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:
Jul. 12, 2011
Filed:
Jul. 23, 2004
Axel Haupt, Langenhagen, DE;
Volker Schmitt, Hannover, DE;
Johannes Huber, Langensendelbach, DE;
Bernd Matschkal, Zirndorf, DE;
Axel Haupt, Langenhagen, DE;
Volker Schmitt, Hannover, DE;
Johannes Huber, Langensendelbach, DE;
Bernd Matschkal, Zirndorf, DE;
Sennheiser electronic GmbH & Co. KG, Wedemark, DE;
Friedrich-Alexander-Universitaet Erlangen-Nuernberg, Erlangen, DE;
Abstract
The invention is based on the idea of providing a method for high-resolution, waveform-preserving digitization of analog signals, wherein conventional scalar logarithmic quantization is transferred to multi-dimensional spherical coordinates, and the advantages resulting from this, e.g., a constant signal/noise ratio over an extremely high dynamic range with very low loss with respect to the rate-distortion theory. In order to make use of the statistical dependencies present in the source signal for an additional gain in the signal/noise ratio, the differential pulse code modulation (DPCM) is combined with spherical logarithmic quantization. The resulting method achieves an effective data reduction with a high long-term and short-term signal/noise ratio with an extremely small signal delay.