Video compression based on spatial-temporal features

An encoder comprising:

• a processing system;
• and
• a memory storing instructions that, when executed by the processing system, causes the encoder to:
• receive a plurality of first pixel values associated with a first image in a sequence of images;
• calculate a difference between each of the plurality of first pixel values and a respective one of a plurality of second pixel values associated with a second image that precedes the first image in the sequence of images;
• calculate a degree of change between the plurality of first pixel values and the plurality of second pixel values as a function (D [C, P]) of the differences between the plurality of first pixel values and the plurality of second pixel values;
• calculate a difference between each of the plurality of first pixel values and an average first pixel value associated with the plurality of first pixel values;
• calculate a degree of variation among the plurality of first pixel values as a function (V [C]) of the differences between the plurality of first pixel values and the average first pixel value;
• calculate a difference between each of the plurality of second pixel values and an average second pixel value associated with the plurality of second pixel values;
• and
• calculate a degree of variation among the plurality of second pixel values as a function (V [P]) of the differences between the plurality of second pixel values and the average second pixel value;
• determine a change importance factor (CIF) based on the degree of variation among the plurality of first pixel values, the degree of change between the plurality of first pixel values and the plurality of second pixel values, and the degree of variation among the plurality of second pixel values;
• and
• selectively transmit the plurality of first pixel values to a receiving device based at least in part on the CIF.

A method of encoding, comprising:

• receiving a plurality of first pixel values associated with a first image in a sequence of images;
• calculating a difference between each of the plurality of first pixel values and a respective one of a plurality of second pixel values associated with a second image that precedes the first image in the sequence of images;
• calculating a degree of change between the plurality of first pixel values and the plurality of second pixel values as a function of the differences between the plurality of first pixel values and the plurality of second pixel values;
• calculating a difference between each of the plurality of first pixel values and an average first pixel value associated with the plurality of first pixel values;
• calculating a degree of variation among the plurality of first pixel values as a function of the differences between the plurality of first pixel values and the average first pixel value;
• calculating a difference between each of the plurality of second pixel values and an average second pixel value associated with the plurality of second pixel values;
• calculating a degree of variation among the plurality of second pixel values as a function of the differences between the plurality of second pixel values and the average second pixel value:
• determining a change importance factor (CIF) based on the degree of variation among the plurality of first pixel values, the degree of change between the plurality of first pixel values and the plurality of second pixel values, and qathe degree of variation among the plurality of second pixel values;
• and
• encoding the plurality of first pixel values in accordance with one or more encoding parameters associated with the CIF.