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:
Sep. 14, 2004
Filed:
Oct. 05, 1999
Michael C. G. Lee, Ottawa, CA;
Frederic Simard, Nepean, CA;
Nortel Networks Limited, St. Laurent, CA;
Abstract
The invention provides a method and apparatus for establishing a non-obtrusive data channel within a voice communication channel to transmit data during an audio transmission without disruption. This audio transmission can be for example, an audio conversation between a first and a second party. The invention uses spread spectrum modulation to hide the reception and transmission of data from the first and second party and allow the ongoing conversation to proceed uninterrupted. In a preferred embodiment, the invention is used to provide an enhanced call waiting feature whereby caller identifying (ID) information of a third party is transmitted over a telephone line from a local central office (CO) to a first party engaged in a telephone conversation with a second party. Advantageously, the use of spread spectrum modulation to transmit data in a voice channel carrying a telephone conversation prevents any interruption in the on-going conversation and does not result in any noticeable disruption.