Hewlett-packard Company

Hewlett Packard Enterprise Development LP

David B Fujii

Robert A Rust

Siamak Tavallaei

Yoocharn Jeon

David Hershberger

A multimodal memristor memory provides selectable or reconfigurable operation in a plurality of operational modes of a memristor. The multimodal memristor memory includes a memristor having a plurality of operational modes. The multimodal memristor memory further includes a reconfigurable interface driver to select an operational mode of the plurality of operational modes of the memristor. The memristor is to operate in the operational mode selected by the reconfigurable interface driver.

Multimodal memristor memory

A system converts a source image into destination image pixels that are binary. The system includes a memory which stores at least a portion of a row of source grey level pixels, and a corresponding row of a threshold matrix of plural rows of grey level pixel values, each row including at least W pixel values. A scale register stores N source grey level pixel values that have been scaled to match N grey level destination image pixel locations. A threshold register outputs, in parallel, up to N of the W threshold pixel values. Alignment logic controllably enters the threshold pixel values into the threshold register. A controller operates the alignment logic to enter the W threshold pixel values into N contiguous storage positions in the threshold register, and if W greater than N, enables entry of excess ones of the W threshold pixel values into contiguous storage positions in the threshold register after the (W-N) previously entered threshold pixel values have been outputted. A comparator compares the N source pixel values with corresponding ones of the N threshold pixel values and assigns N binary values to the destination image in accordance with the comparing action.

High speed system for threshold matrix alignment and tiling, during

A system converts a source image, which may include plural grey level source pixels at a first resolution level, to a destination image at a second resolution level. The system employs a scaling subsystem including a memory which stores at least a portion of a row of source pixels, a scale factor and a relative input index array (RIIA) comprising a single index bit for each column of the destination image. Each index bit enables a grey level source pixel to be identified to be used in scaling of the source image to the second resolution. A scale logic circuit is responsive to each index bit and the source pixels, to associate at least one source pixel with each column of the destination image. The scaling subsystem further includes a control processor which calculates the RIIA based upon the scale factor stored in the memory.

High speed system for image scaling

A system converts a source image of grey level pixel values into a destination image of binary pixel values, the source and destination images having different levels of resolution. The system includes a memory which stores at least a portion of a row of source pixels, a corresponding row of a grey level threshold matrix and a relative input index array (RIIA) which employs a single index bit for each column of the destination image. Index bits are read from the memory and placed in an index bit register, and N source pixel values are written into a source register. A scale logic circuit includes N destination image column outputs and is responsive to each index bit, to output one grey level source pixel on each output. An alignment switch is responsive to a clock input to provide N threshold pixel value outputs that are aligned with corresponding destination image pixels. A comparator compares each source grey level pixel with a corresponding threshold pixel value and assigns a binary value in accordance with the comparison action. A controller initially loads the registers with values from the memory and then synchronously operates the system to output, in parallel, N destination image binary pixel values per clock cycle.

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Boise, ID, United States of America

David B Fujii