Method and system for doppler ultrasound audio dealiasing
AssigneeSiemens Medical Systems, Inc.
InventorsJa-il Koo, Scott D. Otterson
Life of this patent
Estimating the term…
Abstract
A Doppler audio dealiasing system has a zero inserter that inserts zeros between input samples of signal. The resultant signal is then processed in various ways. After the zeros are inserted and a new signal is formed, the newly formed signal is filtered with or without a modulator and otherwise processed to remove inappropriate parts to generate forward and reverse audio signals corresponding to the adjuster.
Claims10
A method for use in a Doppler ultrasound system including a transducer which transmits and receives ultrasound signals, said transducer generating an ultrasound signal and receiving an echo of said signal, wherein said echo is sampled by a sampling process to generate a stream of aliased input sample signals, wherein the combination of each of said input sample signals with the next sampled signal in said stream is an input sample pair, said method comprising the steps of:
- inserting a zero value sample between each of said input sample pairs to form a new signal stream which includes both appropriate parts and inappropriate parts;
- and
- filtering said new signal stream to remove said inappropriate parts to provide a dealiased output signal.
A Doppler ultrasound system including a transducer for transmitting an ultrasound signal and for receiving an echo of said ultrasound signal, wherein said system further includes a sampling process for converting said echo into a stream of input sample signals, wherein the combination of each of said input sample signals in said stream with the next sampled signal in said stream is an input sample pair, said system comprising:
- a zero inserter component which inserts a zero-value sample between each of input sample pairs to form a new signal stream including both appropriate parts and inappropriate parts;
- and
- a filter component which removes said inappropriate parts from said new signal stream to provide an output signal.
Dependencies are inferred from the claim text.