Motion estimation methods for residual prediction

A computer-implemented method, comprising:

• at a video encoder:
• determining a first value by reducing a bit-length of a reference pixel value and adding a first predetermined value to the result;
• determining a second value by subtracting a residual pixel value from a current pixel value to generate a difference value, reducing a bit-length of the difference value and adding the first predetermined value to the result;
• and
• setting the second value to zero when the second value is equal to or less than a second predetermined value and setting the second value to a third predetermined value when the second value is equal to or greater than a fourth predetermined value.

An article comprising a computer program product having stored therein instructions that, if executed, result in:

• at an video encoder:
• determining a first value by reducing a bit-length of a reference pixel value and adding a first predetermined value to the result;
• determining a second value by subtracting a residual pixel value from a current pixel value to generate a difference value, reducing a bit-length of the difference value and adding the first predetermined value to the result;
• and
• setting the second value to zero when the second value is equal to or less than a second predetermined value and setting the second value to a third predetermined value when the second value is equal to or greater than a fourth predetermined value.

An apparatus, comprising:

• a processor configured to:
• determine a first value by reducing a bit-length of a reference pixel value and adding a first predetermined value to the result;
• determine a second value by subtracting a residual pixel value from a current pixel value to generate a difference value, reducing a bit-length of the difference value and adding the first predetermined value to the result;
• and
• set the second value to zero when the second value is equal to or less than a second predetermined value and set the second value to a third predetermined value when the second value is equal to or greater than a fourth predetermined value.

A system comprising:

• a antenna to transmit encoded video data;
• and
• a video encoder, wherein the video encoder is communicatively coupled to the antenna and wherein the video encoder is to generate the encoded video data by, at least in part:
• determining a first value by reducing a bit-length of a reference pixel value and adding a first predetermined value to the result;
• determining a second value by subtracting a residual pixel value from a current pixel value to generate a difference value, reducing a bit-length of the difference value and adding the first predetermined value to the result;
• and
• setting the second value to zero when the second value is equal to or less than a second predetermined value and setting the second value to a third predetermined value when the second value is equal to or greater than a fourth predetermined value.