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. 14, 2004
Filed:
Jul. 03, 2002
Phillip Marc Johnson, Raleigh, NC (US);
Abstract
A system and method of determining whether a receiver in active (non-DTX) mode should remain in active (non-DTX) mode or switch to inactive (DTX) mode and vice versa. For switching from non-DTX to DTX mode in a receiver, a received AMR frame is subjected to a SID_FIRST marker comparison. If the results of the SID_FIRST marker comparison exceed a SID_FIRST threshold, then the received AMR frame is processed as a SID_FIRST frame and the receiver is switched to DTX mode. Otherwise, the received AMR frame is subjected to a SID_UPDATE marker comparison. If the results of the SID_UPDATE marker comparison exceed a SID_UPDATE threshold, then the received AMR frame is processed as a SID_UPDATE frame and the receiver is switched to DTX mode. Otherwise, the received AMR frame is processed as a voice frame in non-DTX mode. For switching from DTX to non-DTX mode in a receiver, a received AMR frame in DTX mode is subjected to an ONSET frame comparison. If the results of the ONSET frame comparison exceed a threshold, then the received AMR frame is processed as an ONSET frame and the receiver is switched to non-DTX mode. Otherwise, the received AMR frame is subjected to a SID_UPDATE marker comparison. If the results of the SID_UPDATE marker comparison exceed a threshold, then the received AMR frame is processed as a SID_UPDATE frame and the receiver remains in inactive DTX mode. Otherwise, it is determined whether the received AMR frame is a voice frame, and if so, the receiver is switched to non-DTX mode, and if not, the received AMR frame is classified as a NO_DATA frame and the receiver remains in inactive DTX mode.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile