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Method for assisting video compression in a computer system

  • US 7,595,844 B2
  • Filed: 09/11/2006
  • Issued: 09/29/2009
  • Est. Priority Date: 03/26/1998
  • Status: Expired due to Fees
First Claim
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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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