1. A method for providing video signals comprising:
rendering an entire first frame of video using a first graphics device;
rendering an entire second adjacent frame with video; and
outputting either the first or second frame of rendered video from either the first or second graphics devices through a common port.
2. The method of claim 1 comprising correlating video out voltages of the first and second graphics devices.
3. An apparatus for providing video signals comprising:
a first graphics device operative to render an entire first frame of video;
a second graphics device operative to render an entire second alternating temporally adjacent frame of video; and
a common port operatively coupled to the first graphics device and the second graphics device, the common port being operative to receive the first and second frames of rendered video from either of the first and second graphics devices; and
a first switch having a first input coupled to a first video component output of the first graphics device, and a second input coupled to a first video component output of the second graphics device, and an output coupled to the common port, wherein the common port is coupled to the first and second graphics devices through the switch.
4. The apparatus of claim 3 including a first frame buffer operatively coupled to the first graphics device and a second frame buffer operatively coupled to the second graphics device.
5. The apparatus of claim 4 including at least one digital to analog converter operatively coupled to output video and having voltage adjusted in order to correlate video out voltages being provided by at least one of the graphics devices.
6. The apparatus of claim 3 including circuitry operative to provide digital to analog conversion voltage equalization associated with the first and second graphics devices.
7. The apparatus of claim 3 wherein the first graphics device includes a controller operative to select video from the second graphics device to be output to the common port.
8. The apparatus of claim 3 including a load operatively couplable to either one of first and second graphics devices when at least one of the first and second graphics devices is not driving the common port.
9. The apparatus of claim 3 wherein the first graphics device acts as a master to the second graphics device and provides synchronization control for the second graphics device.
10. The apparatus of claim 9 wherein the first graphics device includes a reference signal generator for the second graphics controller.
11. The apparatus of claim 3 wherein the first graphics device and second graphics devices are video graphics adapters.
12. The apparatus of claim 3 wherein the first and second rendered frames are adjacent frames of video.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A device for aiding the selection of a restraint orthosis of compressive orthosis type made of elastic or inelastic material, and its adaptation to the morphology of a limb for which this orthosis is intended, this device comprising:
means (10) for numerically simulating the action of the restraint on the hemodynamics of the venous return, able to deliver values of blood flow rate andor intravenous pressure at a plurality of points of a numerical model representative of the sural venous network of a limb, and
means (26) for presenting said values of blood flow rate andor intravenous pressure determined by these numerical simulation means,
which device is characterized in that it furthermore comprises means (14; 16) for:
producing restraint pressure values capable of being exerted by said orthosis at the surface of the limb at a corresponding plurality of predetermined points, and
applying the values thus produced as input to said numerical simulation means (10).
2. The device of claim 1, where said means for producing restraint pressure values (14) comprise a set of sensors for measuring the pressure exerted by the orthosis at the surface of the limb at the location of the sensor.
3. The device of claim 1, where said means for producing restraint pressure values (16) comprise:
means for establishing a first file of data representative of the morphological characteristics of the limb (20),
means for establishing a second file of data representative of the dimensional and rheological characteristics of the orthosis (22), and
restraint pressure mapping calculation means (18) able to determine said restraint pressure values on the basis of the data of the first and second files.
4. The device of claim 1, where the numerical simulation means (10) are also able to receive as input a posture parameter (24) and to select or adapt the numerical model of the venous network as a function of this posture parameter.
5. The device of claim 1, where the means (26) for presenting the values of blood flow rate andor intravenous pressure comprise means for displaying a weighted directed graph (30, 36) comprising a plurality of interconnected arcs (32) each representative of a vessel segment of the sural venous network, these display means being able to associate with each arc of the graph a corresponding value of blood flow rate andor intravenous pressure calculated by the numerical simulation means.
6. The device of claim 5, where the display means are able to apply locally to each arc (32) of the graph (30, 36) a color coding representative of the corresponding value of blood flow rate andor intravenous pressure.
7. The device of claim 5, where the display means comprise means able to produce a plane representation of the graph (30).
8. The device of claim 5, where the display means comprise means able to produce, in overlay, a three-dimensional representation of the graph (36) and a three-dimensional representation of the surface of the limb (38).