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:
Jun. 24, 2014
Filed:
May. 28, 2009
Aleksey Alexandrovich Letunovskiy, Tokarevka, RU;
Ilya Viktorovich Lyalin, Moscow, RU;
Alexander Markovic, Media, PA (US);
Ivan Leonidovich Mazurenko, Khimki, RU;
Andrey Anatolevich Nikitin, Moscow, RU;
Aleksey Alexandrovich Letunovskiy, Tokarevka, RU;
Ilya Viktorovich Lyalin, Moscow, RU;
Alexander Markovic, Media, PA (US);
Ivan Leonidovich Mazurenko, Khimki, RU;
Andrey Anatolevich Nikitin, Moscow, RU;
LSI Corporation, San Jose, CA (US);
Abstract
In one embodiment, a DSP having four arithmetic logic units (ALUs) and able to have two read/write operations per clock cycle performs silence detection and tone detection for data frames containing samples of an audio signal. The ALUs are used together in parallel to process the samples in the data frames received by the DSP. A received data frame is filtered by the silence detection so that substantially silent frames are dropped and non-silent frames are further processed. In the tone detection, a filtered data frame is processed, four samples at a time, to determine the power of the signal at a given frequency, where the power determination is used to determine whether a given tone (i.e., a signal at a given frequency) is present in the data frame.