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Image encoding apparatus, image encoding method, and recording medium

  • US 9,986,239 B2
  • Filed: 01/27/2014
  • Issued: 05/29/2018
  • Est. Priority Date: 03/27/2013
  • Status: Active Grant
First Claim
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1. An image encoding apparatus comprising circuitry configured to:

  • store an update time of a tile which is a region obtained by dividing a frame of an image into a predetermined size;

    detect an update tile, which is a tile in which update occurs between a latest frame and a frame before the latest frame, and an update region, which is a region where update occurs, when the latest frame of the image has been provided;

    calculate an update interval index representing an index having a long update interval in an entire update tile overlapping the update region, for each update region;

    specify an important region from each update region by using the update interval index;

    calculate a proportional division result by dividing a total target code amount, per one frame, proportionally according to a ratio defined as an area of an entirety of the important region to an area of an entirety of the update region;

    allocate a code amount, as an amount larger than the proportional division result, to be a target code amount of the entire important region, and specify a quality value of the entire important region on the basis of the target code amount; and

    encode the entire important region with the quality value.

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