Nvidia Corporation

Martin Schwarzer

Fred D Nicklisch

One embodiment of the invention sets forth a method for toggling between video scanouts generated by a plurality of graphics processing units. The method includes the steps of transmitting a set of programming instructions to a first graphics processing unit and to a second graphics processing unit, configuring a first state machine within the first graphics processing unit to cause a trigger signal to be included with each video frame transmitted by the first graphics processing unit for display, and configuring a second state machine within the second graphics processing unit to cause a trigger signal to be included with each video frame transmitted by the second graphics processing unit for display. The method advantageously creates a direct relationship between the transmission frequencies of the individual graphics processing units and the switching frequency of a video bridge, not relying on a driver to control the video bridge switching.

Methods and apparatus for toggling between graphics processing unit video scanouts

A method for assembling image data for transport across a digital video interface includes receiving and converting first-formatted pixel data to a second-formatted pixel data. The second-formatted pixel data is readable by a rendering device, the second-formatted pixel data having a bit width that differs from an input bit width standard of the digital video interface. The second-formatted pixel data is assembled into a transport packet having a bit width which is equal to the input bit width standard of the digital video interface. The digital video interface is operable to receive the transport packet comprising the second-formatted pixel data, and thereby communicate the second-formatted pixel data to the rendering device.

Systems and methods for assembling image data for transmission across a digital video interface

A method for selecting a pixel output format includes selecting a first pixel to be output, and determining whether the first pixel to be output overlaps with a second pixel. The second pixel is available in the first format from a first source, and in a second format from a second source. The method further includes converting the second pixel in the second format to the first format to produce a converted second pixel. The converted second pixel is compared to the second pixel having the first format, and the second pixel having the first format or the second pixel having the second format is selected for output based upon the comparison.

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Wuerselen, Germany

Martin Schwarzer