Nortel Networks Corporation

Nuance Communications, Inc.

Michael Leong

Marc W Regan

Sergey Fedorov

Ryan S LaSante

John R Watson

Carmit Brikman

Yuriy Zakharov

Galina Titova

Some embodiments relate to techniques for receiving a query from a device and location data indicating a location of the device, the location data having a level of specificity; in response to the query being received, identifying at least one first search engine to which to submit a representation of the query; determining whether the level of specificity of the received location data is sufficient for the at least one first search engine; if the level of specificity of the location data is sufficient, instructing the device to issue the representation of the query to the at least one first search engine; and if the level of specificity of the location data is not sufficient, instructing the device to send, to the at least one computer, location data at a greater level of specificity.

Methods and apparatus for employing a user's location in providing information to the user

A general purpose network tone detection method and apparatus that allows the precise and accurate recognition of North American tones (MF, DTMF (Dual-Tone Multifrequency), and CPT (Call Progress Tones)) and international MF-R2 tones as well as taking into consideration other common tones such as Calling Card Service Prompt and Recall Dial. Through the use of the Discrete Fourier Transform (DFT) on small time windows and by providing phase continuity between these windows, the results of the successive DFTs may be combined and processed by a second DFT computation. This second DFT allows higher frequency resolution without requiring the re-computation of the DFT from the time samples. The resulting effect is a tone receiver with both high time and frequency resolution which consequently leads to robust and accurate tone recognition systems conforming even to the most stringent specification while maintaining low computational requirements.

Method and apparatus for performing spectral processing in tone detection

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Montreal, Canada

Michael Leong