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:
Oct. 29, 2013
Filed:
Jun. 23, 2010
Stefan Strommer, Stockholm, SE;
Karsten Vandborg Sorensen, Stockholm, SE;
Soren Skak Jensen, Malmo, SE;
Koen Vos, San Francisco, CA (US);
Jon Bergenheim, Uppsala, SE;
Stefan Strommer, Stockholm, SE;
Karsten Vandborg Sorensen, Stockholm, SE;
Soren Skak Jensen, Malmo, SE;
Koen Vos, San Francisco, CA (US);
Jon Bergenheim, Uppsala, SE;
Skype, Dublin, IE;
Abstract
A method and apparatus for transmitting an audio signal over a communication channel comprising encoding the audio signal with an encoderusing a first sampling rate, filtering the audio signal using a first cut off frequency, the first cut off frequency being chosen in dependence upon the first sampling rate, and transmitting the encoded and filtered audio signal over the communication channel. The presence of a condition in which the sampling rate of the encoderis to be switched to a second sampling rate at a switching time is determined and if the condition has been determined to be present, the cut off frequency used in the filtering step is gradually changed from the first cut off frequency to a second cut off frequency, the second cut off frequency being chosen in dependence upon the second sampling rate, such that the audio bandwidth of the transmitted signal changes gradually when the sampling rate is switched to the second sampling rate.