Howard IP Law, PLLC
Apparatus and method for parallel polyphase image interpolation
The present invention provides apparatus and method for parallel polyphase image interpolation. The apparatus comprises: a local memory, a first memory access control unit, a second memory access control unit, a source image data buffering unit, a filter coefficient buffering unit, a multiply-accumulator, a third memory access control unit and a state machine; the first memory access control unit is configured for obtaining source image data from the local memory and buffering them into a source image data buffering unit; the second memory access control unit is configured for obtaining filter coefficients from the local memory and buffering them into a filter coefficient buffering unit; the source image data buffering unit is configured for inputting source image data to each multiply-accumulator, the filter coefficient buffering unit is configured for broadcasting filter coefficients corresponding to the source image data to the multiply-accumulators; and the multiply-accumulator is configured for performing multiply-accumulation operation on the source image data and the filter coefficients, and outputting the multiply-accumulation result every F clocks. The interpolation apparatus of the present invention is reconfigurable and can support interpolation filters with any order, so it is universal.
Institute of Automation Chinese Academy of Sciences
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Lei Chen Rui Donglin Ruoshan
Wang Lin Han Wang Guo