Fractional delay filter-based beamformer apparatus using post filtering
AssigneeIndustry-University Cooperation Foundation Sogang University
InventorsTai-Kyong Song, Jeong Cho, Jae-Hee Song
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Abstract
A beamforming apparatus is provided for improving beamforming accuracy by employing fractional delay filters in an interpolation process and reducing hardware complexity by using post-filtering technique. The beamforming apparatus of the present invention includes a post-filtering means implemented with fractional delay filters that combines block data, on the respective channels, supposed to be fractionally delayed and obtains a delay value of fractional part from the combined data. The post-filtering means collects the block data of the channels assigned identical coefficients and performs a filtering process simultaneously.
Claims8
A multichannel beamforming apparatus for an ultrasonic imaging system which includes a memory for storing sampled data for each channel and a means for generating block data on the basis of an integer part of a delay value, comprising:
- a post-filtering means including a fractional delay filter which combines block data, on respective channels, supposed to be identically fractionally-delayed and obtains a delay value of fractional part from the combined data, the post-filtering means combining the block data of the channels assigned an identical coefficient and performing a filtering process simultaneously.
A beamforming method for an ultrasonic imaging system including a multichannel beamforming apparatus having a memory for storing sampled data for each channel and a means for generating block data on the basis of an integer part of a delay value, comprising:
- post-filtering including combining block data supposed to be identically fractionally-delayed and obtaining a delay value of fractional part from the combined data, the block data assigned an identical coefficient being combined and filtered simultaneously.
Dependencies are inferred from the claim text.