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:
Apr. 15, 2003
Filed:
Dec. 30, 1999
Jonathan Alistair Gibbs, Southampton, GB;
David Pearce, Harrow, GB;
Dominic Chan, Kowloon, HK;
Andrew John Aftelak, Newbury, GB;
Motorola, Inc., Schaumburg, IL (US);
Abstract
A method and apparatus for smooth transitions of background noise as a mobile communication unit roams from a first communication system having a first speech encoder ( ) to a second communication system having a second speech encoder ( ). As the mobile communication unit roams into the second communication system, the first communication system will transfer the communication signal to the second communication system. Background noise from the first communication system is sampled ( ), and as the communication signal is transferred, the noise signal sampled in the first communication system is mixed in a mixer of the second communication system with background noise sampled ( ) from the second communication system. As the change in noise progresses, the noise from the first communication system will gradually be decreased and faded out while the noise from the second communication system will be gradually increased to a high power level.