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:
Dec. 17, 2013
Filed:
Jan. 31, 2006
Martin Gartner, Ekolsund, SE;
Bernd Geiser, Aachen, DE;
Peter Jax, Hannover, DE;
Stefan Schandl, Vienna, AU;
Herve Taddei, Bonn, DE;
Peter Vary, Aachen, DE;
Martin Gartner, Ekolsund, SE;
Bernd Geiser, Aachen, DE;
Peter Jax, Hannover, DE;
Stefan Schandl, Vienna, AU;
Herve Taddei, Bonn, DE;
Peter Vary, Aachen, DE;
Siemens Enterprise Communications GmbH & Co. KG, Munich, DE;
Abstract
To form an audio signal, frequency components of the audio signal which are allotted to a first subband are formed by means of a subband decoder using supplied fundamental period values which respectively indicate a fundamental period for the audio signal. Frequency components of the audio signal which are allotted to a second subband are formed by exciting an audio synthesis filter using an excitation signal which is specific to the second subband. To produce this excitation signal, an excitation signal generator derives a fundamental period parameter from the fundamental period values. The fundamental period parameter is used by the excitation signal generator to form pulses with a pulse shape which is dependent on the fundamental period parameter at an interval of time which is determined by the fundamental period parameter and to mix them with a noise signal.