Microsoft Technology Licensing, LLC

Siemens Medical Solutions USA, Inc.

Siemens Medical Systems, Inc.

Hong Wang

Hosam Adel Khalil

Allen Gersho

Vladimir Cuperman

Robert Nolen Phelps

John R Klepper

Zuhua Mao

Lin-Xin Yao

Zoran B Banjanin

Tai-Kyong Song

Paul T Kuhn

A method and system of performing postfiltering in the frequency domain to improve the quality of a speech signal, especially for synthesized speech resulting from codecs of low bit-rate, is provided. The method comprises LPC tilt computation and compensation methods and modules, a formant filter gain computation method and module, and an anti-aliasing method and module. The formant filter gain calculation employs an LPC representation, an all-pole modeling, a non-linear transformation and a phase computation. The LPC used for deriving the postfilter may be transmitted from an encoder or may be estimated from a synthesized or other speech signal in a decoder or receiver. The invention may be implemented in a linked decoder and encoder. A separate LPC evaluation unit that is responsible for processing and or deriving the LPC may be implemented within the invention.

Frequency domain postfiltering for quality enhancement of coded speech

An image processing system according to an implementation of the invention includes a plurality of signal processing modules ( ) inline in a data stream receiving signals. The signal processing modules include input multiplexers ( ) adapted to control an order of or bypassing of processing by the signal processing modules. The signal processing modules may be implemented as hardware-based, nonlinear signal processing modules, such as log compress, decimation, compounding, blending, edge enhancement, automatic gain control, BHNS, lateral, or persistence filters.

System and method for re-orderable nonlinear echo processing

An ultrasound array imaging system ( ) and method for improving beamforming quality and ultimately for improving an ultrasound image are disclosed. The ultrasound array imaging system ( ) includes a transducer ( ), a first beamformer ( ), a second beamformer ( ) and a comparator ( ). The first beamformer ( ) receives a first electronic echo signal from the transducer ( ) and produces a first apodized beam signal in accordance with a first beamforming apodization function. The second beamformer ( ) receives the same electronic echo signal from the transducer ( ) and produces a second apodized beam signal in accordance with a second beamforming apodization function. The first and second apodized beam signals are compared in the comparator ( ) which then combines the first and second apodized beam signals to create a combined apodized beam signal for producing an image that has its lateral and contrast resolution simultaneously optimized.

System and method for adaptive beamformer apodization

A BcD mode ultrasound imaging system including a Doppler processor which is configured to receive a Doppler signal having components that are corrupted by residue from color mode interleaving. The Doppler processor is configured to analyze the residue effect and compensate for the residue by filtering the received Doppler signal.

Removing beam interleave effect on doppler spectrum in ultrasound imaging

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Bellevue, WA, United States of America

Hong Wang