Method for assisting video compression in a computer system
First Claim
1. A method for compressing video data in a computer system comprising:
- receiving a current video frame at a dedicated video input of a core logic chip;
computing at the core logic chip a difference frame from the current video frame and a previous video frame as the current video frame streams into the dedicated video input of the core logic chip and without conveying the previous video frame to or from a system memory, the previous video frame being also received through the dedicated video input of the core logic chip as a previous current video frame and retained therein until the difference frame is computed;
conveying the previous video frame to the system memory over a memory interface separate from the dedicated video input and storing the previous video frame therein after computing the difference frame;
storing the difference frame directly from the core logic chip to the system memory over the memory interface separate from the dedicated video input; and
retrieving the difference frame directly from the system memory for a processor to complete compression of the video data.
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Abstract
One embodiment of the present invention provides a method that facilitates compression of video data in a computer system by performing the time-consuming task of computing the difference between successive frames of video data independently from the central processing unit. This frees the often-overburdened central processing unit from performing this time-consuming compression operation and can thereby improve the handling of video data. Thus, one embodiment of the present invention can be characterized as a method thr compressing video data in a computer system. This method includes receiving a stream of data from a current video frame in the computer system. It also includes computing a difference frame from the current video frame and a previous video frame “on-the-fly” as the current video frame streams into the computer system. The method additionally includes storing the difference frame in a memory in the computer system.
25 Citations
10 Claims
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1. A method for compressing video data in a computer system comprising:
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receiving a current video frame at a dedicated video input of a core logic chip; computing at the core logic chip a difference frame from the current video frame and a previous video frame as the current video frame streams into the dedicated video input of the core logic chip and without conveying the previous video frame to or from a system memory, the previous video frame being also received through the dedicated video input of the core logic chip as a previous current video frame and retained therein until the difference frame is computed; conveying the previous video frame to the system memory over a memory interface separate from the dedicated video input and storing the previous video frame therein after computing the difference frame; storing the difference frame directly from the core logic chip to the system memory over the memory interface separate from the dedicated video input; and retrieving the difference frame directly from the system memory for a processor to complete compression of the video data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification