ROBERT L DUNN
Broker in Quincy, MA

2008005, Feb 28, 2008

Aug 10, 2007

11/889332

Joseph Aguilar - Lawrenceville NJ, US
David Campana - Princeton NJ, US
Robert Dunn - Quincy MA, US
Robert McAulay - Lexington MA, US
Xiaoquin Sun - Plainsboro NJ, US
Wei Wang - Plainsboro NJ, US
Craig Watkins - Hamilton, AU
Robert Zopf - Lawrenceville NJ, US

G10L 21/00

704230000

A system and method for processing of audio and speech signals is disclosed, which provide compatibility over a range of communication devices operating at different sampling frequencies and/or bit rates. The analyzer of the system divides the input signal in different portions, at least one of which carries information sufficient to provide intelligible reconstruction of the input signal. The analyzer also encodes separate information about other portions of the signal in an embedded manner, so that a smooth transition can be achieved from low bit-rate to high bit-rate applications. Accordingly, communication devices operating at different sampling rates and/or bit-rates can extract corresponding information from the output bit stream of the analyzer. In the present invention embedded information generally relates to separate parameters of the input signal, or to additional resolution in the transmission of original signal parameters. Non-linear techniques for enhancing the overall performance of the system are also disclosed. Also disclosed is a novel method of improving the quantization of signal parameters. In a specific embodiment the input signal is processed in two or more modes dependent on the state of the signal in a frame. When the signal is determined to be in a transition state, the encoder provides phase information about N sinusoids, which the decoder end uses to improve the quality of the output signal at low bit rates.

7272556, Sep 18, 2007

Sep 23, 1998

09/159481

Joseph Gerard Aguilar - Lawrenceville NJ, US
David A. Campana - Princeton NJ, US
Raymond Chen - Neshanic Station NJ, US
Robert B. Dunn - Quincy MA, US
Robert J. McAulay - Lexington MA, US
Xiaoquin Sun - Plainsboro NJ, US
Wei Wang - Plainsboro NJ, US
Craig Watkins - Hamilton, AT
Robert W. Zopf - Lawrenceville NJ, US

Lucent Technologies Inc. - Murray Hill NJ

G10L 21/00

704230, 704226, 704201

A system and method for processing of audio and speech signals is disclosed, which provide compatibility over a range of communication devices operating at different sampling frequencies and/or bit rates. The analyzer of the system divides the input signal in different portions, at least one of which carries information sufficient to provide intelligible reconstruction of the input signal. The analyzer also encodes separate information about other portions of the signal in an embedded manner, so that a smooth transition can be achieved from low bit-rate to high bit-rate applications. Accordingly, communication devices operating at different sampling rates and/or bit-rates can extract corresponding information from the output bit stream of the analyzer. In the present invention embedded information generally relates to separate parameters of the input signal, or to additional resolution in the transmission of original signal parameters. Non-linear techniques for enhancing the overall performance of the system are also disclosed.