Silicon Graphics, Incorporated

Shutterfly, Inc.

Jarrett Redd

Mark Stefan Grossman

Shrijeet Mukherjee

Daniel R Baum

Xin Wen

Russ Ennio Muzzolini

John Voris

Alex Chalfin

Jeff Boone

Jeannine Marie Smith

Jeffrey Daudel

Peter Ostrin

A system, method, and computer program product is presented for simulating a system of hardware components. Each component is simulated in a hardware definition language such as VERILOG. Each component is represented as a simulated device under test (DUT) that is incorporated into a simulation module. The invention synchronizes the simulation modules by issuing clock credit to each simulation module. Each simulation module can only operate when clock credit is available, and can only operate for some number of clock cycles corresponding to the value of the clock credit. Operation is said to consume the clock credit. After a simulation module has consumed its clock credit, its DUT halts. Once every simulation module has consumed its clock credit and halted, another clock credit can be issued. This allows checkpointing of the operation of each DUT and simulates parallelism of the DUTs using executable images of manageable size. A given DUT can include two or more subsets of logic that each require a clock signal having a different rate. Such subsets of the logic of a DUT are referred to as clock domains. The appropriate clock signals are created by a test bench component of the simulation module. The test bench creates a master clock signal for the DUT. The test bench then divides this clock signal to produce clock signals applied to the clock domains of the DUT. The test bench can be created through automated means by providing a system specification that defines the inputs (including clocks) and outputs of a DUT. This allows a test bench specific to the DUT to be created.

Synchronization of hardware simulation processes

A high-speed digital photographic printing system and method includes image-specific backprinting and automatic tracking and sorting of printed jobs. The system includes one or more photographic printers, where each printer can have a different printing rate. A scheduler schedules printing orders to the different printers. The printer-independent image rendering is conducted asynchronous to the printing to maximize the printing throughput. In some embodiments, the rendering image processor does the vast majority of the image processing and outputs a printer-independent data file (generally much larger than the source image data file) that requires little if any further data manipulations or processing in the exposure unit. A photographic printing method and system for producing prints in response to input digital images includes a high-speed exposure unit that exposes a photosensitive material coated on a substrate in response to the input digital image, a chemical processor unit that receives and processes the exposed photosensitive material to form visible dye images on the substrate, a backprinting unit that receives the substrate having the visible dye images and prints information on the opposite surface of the substrate to the dye image, and a cutting unit that produces separate sheets of printed images after the backprinting unit prints information.

Apparatus, architecture and method for high-speed printing

Growing community of inventors

San Jose, CA, United States of America

Jarrett Redd