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. 26, 2012
Filed:
Jul. 29, 2008
Shan-ting Hong, Tai-Chung, TW;
Yi-chang Tu, Tai-Nan, TW;
Ching-hsien Liao, Tainan, TW;
Show-hong Chen, Taipei County, TW;
Ying-chuan Peng, Hsinchu County, TW;
Shan-Ting Hong, Tai-Chung, TW;
Yi-Chang Tu, Tai-Nan, TW;
Ching-Hsien Liao, Tainan, TW;
Show-Hong Chen, Taipei County, TW;
Ying-Chuan Peng, Hsinchu County, TW;
Realtek Semiconductor Corp., Hsinchu, TW;
Abstract
An audio multi-standard detection apparatus is provided to pre-record a plurality of audio broadcasting format carrier bands. The detection apparatus includes: a carrier calculation unit and a switch controller. The carrier calculation unit is used for receiving an intermediate frequency signal and calculates the first carrier energy of the intermediate frequency signal in each of the frequency bands. From this first carrier energy, the switch controller determines which frequency bands are existed in the intermediate frequency signal, then analyzes the signal via at least one threshold value to determine the frequency band's primary carrier. The switch controller obtains an effective carrier. Further, the switch controller compares the effective carrier with the pre-recorded carrier bands for selectively outputting the appropriate audio broadcasting format. Hence, the present invention achieves the objective of determining the appropriate audio multi-standard and enables the support of broadcast systems in various countries with a single audio decoding chip.