3 results about "Channel data" patented technology

The invention discloses an FPGA implementation method of a multi-channel data source DDR buffer, including: hanging a plurality of DDR granules with the FPGA, randomly configuring the number of channels, and then arbitrating the DDR reading and writing of each channel, wnerein the arbitration rule is an arbitration rule through polling or matching the bandwidth. The invention buffers the data of each channel to the address space corresponding to each channel of the DDR, the address space size of each channel can be arbitrarily divided, the total address space size is the sum of the memory space of each DDR granule, and the channel data and the DDR are respectively transferred through asynchronous fifo. The invention flexibly and efficiently uses a plurality of DDR granules to carry out read-write arbitration on each channel, can carry out handover on the terminal domain channel when expanding a plurality of asynchronous clocks, flexibly matches the address space mapped by the cache DDR, and centralizes the cache data bandwidth of the plurality of DDRs to cache the arbitrated channel.

Provided are a method and device for ultrasonic imaging by synthetic focusing. The method comprises: exciting a plurality of matrix elements of an ultrasonic probe to transmit plane waves many times, wherein transmitting apodizations at the time of every transmission of the plane waves by the plurality of matrix elements correspond to the respective lines in a measurement matrix in which elements are randomly distributed; after every transmission of the plane waves, exciting all the matrix elements of the ultrasonic probe to receive echo signals, in order to obtain channel data; recovering a synthetic focusing channel data set by use of a compressed sensing reconstruction algorithm according to a channel data set and the measurement matrix; and subjecting the synthetic focusing channel data set to beamforming so as to generate an ultrasonic image.