System and method for communicating graphics over a network
First Claim
1. An apparatus for communicating graphics across a network comprising:
- a frame buffer memory for storing and maintaining at least a portion of a previous frame of graphics information, the graphics information being contained in a video signal;
a temporary memory configured to store at least a portion of a current frame of graphics information;
comparison logic for comparing a portion of the current frame of graphics information with a corresponding portion of the previous frame; and
transmission logic for transmitting the portion of the current frame to a destination computer, if the comparison logic determines that the portion of the current frame of graphics information differs from the corresponding portion of the previous frame by more than a predetermined measure.
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Accused Products
Abstract
The present invention is generally directed to a system and method for communicating video across one or more computer networks. Broadly, the system comprises a frame buffer memory for storing and maintaining a previous frame of graphics information, a temporary memory configured to store at least a portion of a current frame of graphics information, comparison logic for comparing a portion of the current frame of graphics information with a corresponding portion of the previous frame, and transmission logic for transmitting the portion of the current frame to a destination computer, if the comparison logic determines that the portion of the current frame of graphics information differs from the corresponding portion of the previous frame by more than a predetermined measure. Similarly, a method is provided that stores a frame of graphics information obtained from a video signal, receives at least a portion of a current frame of graphics information, compares a portion of the current frame of graphics information with a corresponding portion of the stored frame of graphics information. Then, if the compared portion of the current frame of graphics information differs by at least a predetermined amount from the corresponding portion of the stored graphics information, the method transmits the compared portion of the current frame of graphics information to a destination computer and overwrites the corresponding portion of the stored graphics information with the compared portion of the current frame of graphics information.
85 Citations
19 Claims
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1. An apparatus for communicating graphics across a network comprising:
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a frame buffer memory for storing and maintaining at least a portion of a previous frame of graphics information, the graphics information being contained in a video signal;
a temporary memory configured to store at least a portion of a current frame of graphics information;
comparison logic for comparing a portion of the current frame of graphics information with a corresponding portion of the previous frame; and
transmission logic for transmitting the portion of the current frame to a destination computer, if the comparison logic determines that the portion of the current frame of graphics information differs from the corresponding portion of the previous frame by more than a predetermined measure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for displaying graphics information received from a remote computer and communicated across a network comprising:
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an input for receiving packetized graphics information; and
input logic configured to format and store a portion of a frame of graphics information received at the input into an appropriate location of a frame buffer memory, the portion being an amount less than the whole frame buffer. - View Dependent Claims (15)
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16. A method for communicating graphics across a computer network comprising:
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storing at least a portion of a frame of graphics information obtained from a video signal;
receiving at least a portion of a current frame of graphics information;
comparing a portion of the current frame of graphics information with a corresponding portion of the stored frame of graphics information;
if the compared portion of the current frame of graphics information differs by at least a predetermined amount from the corresponding portion of the stored graphics information, then transmitting the compared portion of the current frame of graphics information to a destination computer; and
if the compared portion of the current frame of graphics information differs by at least a predetermined amount from the corresponding portion of the stored graphics information, then overwriting the corresponding portion of the stored graphics information with the compared portion of the current frame of graphics information. - View Dependent Claims (17, 18, 19)
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Specification