Method and apparatus for constructing motion information list in video encoding and decoding and device

A computer device, comprising a processor and a memory, the memory storing at least one instruction, the at least one instruction, when executed by the processor, causes the computing device to perform operations comprising:

• obtaining a motion information list, wherein the motion information list is a candidate motion information list that is used for providing a candidate prediction displacement vector;
• determining at least one piece of motion information when a length of the motion information list meets a condition, the length referring to a number of pieces of motion information comprised in the motion information list;
• and
• adding the at least one piece of motion information to the candidate motion information list to obtain an updated motion information list when a length of the candidate motion information list is less than a threshold, wherein the motion information list is a historical motion information list used for recording historical motion information and the at least one piece of motion information includes motion information exported from another historical motion information list, wherein the another motion historical motion information list comprises a historical motion information list of an encoding and decoding unit adopting a prediction mode different from that of a current encoding and decoding unit and at least one piece of preset motion information comprising a displacement vector;
• and the displacement vector comprises at least one of the following:
• (0, 0), (−w, 0), (−2*w, 0), (0, −h), (0, −2*h), (−w, −h), (−w, −2*h), (−2*w, −h), or (−2*w, −2*h), wherein w is a width of a minimum encoding and decoding unit, and h is a height of the minimum encoding and decoding unit;
• and
• wherein the preset motion information further comprises position information;
• and the position information comprises at least one of the following:
• coordinates of a pixel of a left boundary of a picture, wherein a horizontal coordinate is 0 and a value range of a vertical coordinate is [0, pic_h−1]);
• coordinates of a pixel of an upper boundary of a picture, wherein a value range of a horizontal coordinate is [0, pic_w−1] and a vertical coordinate is 0;
• coordinates of a pixel of a left boundary of a current CTU row, wherein a horizontal coordinate is 0 and a value range of a vertical coordinate is [y, y+ctu_h−1]);
• coordinates of a pixel of an upper boundary of a current CTU row, wherein a value range of a horizontal coordinate is [0, pic_w−1] and a vertical coordinate is y;
• coordinates of a pixel of a left boundary of a current CTU, wherein a horizontal coordinate is x and a value range of a vertical coordinate is [y, y+ctu_h−1]);
• or
• coordinates of a pixel of an upper boundary of a current CTU, wherein a value range of a horizontal coordinate is [x, x+ctu_w−1] and a vertical coordinate is y, wherein
• coordinates of an upper left corner of the current CTU are (x, y), a width of the picture is pic_w, a height of the picture is pic_h, a width of the current CTU is ctu_w, and a height of the current CTU is ctu_h.

A non-transitory computer-readable storage medium, storing at least one instruction, the at least one instruction, when executed by a processor of a computer device, causes the computing device to perform operations comprising:

• obtaining a motion information list, wherein the motion information list is a candidate motion information list that is used for providing a candidate prediction displacement vector;
• determining at least one piece of motion information when a length of the motion information list meets a condition, the length referring to a number of pieces of motion information comprised in the motion information list;
• and
• adding the at least one piece of motion information to the candidate motion information list to obtain an updated motion information list when a length of the candidate motion information list is less than a threshold, wherein the motion information list is a historical motion information list used for recording historical motion information and the at least one piece of motion information includes motion information exported from another historical motion information list, wherein the another motion historical motion information list comprises a historical motion information list of an encoding and decoding unit adopting a prediction mode different from that of a current encoding and decoding unit and at least one piece of preset motion information comprising a displacement vector;
• and the displacement vector comprises at least one of the following:
• (0, 0), (−w, 0), (−2*w, 0), (0, −h), (0, −2*h), (−w, −h), (−w, −2*h), (−2*w, −h), or (−2*w, −2*h), wherein w is a width of a minimum encoding and decoding unit, and h is a height of the minimum encoding and decoding unit;
• and
• wherein the preset motion information further comprises position information;
• and the position information comprises at least one of the following:
• coordinates of a pixel of a left boundary of a picture, wherein a horizontal coordinate is 0 and a value range of a vertical coordinate is [0, pic_h−1]);
• coordinates of a pixel of an upper boundary of a picture, wherein a value range of a horizontal coordinate is [0, pic_w−1] and a vertical coordinate is 0;
• coordinates of a pixel of a left boundary of a current CTU row, wherein a horizontal coordinate is 0 and a value range of a vertical coordinate is [y, y+ctu_h−1]);
• coordinates of a pixel of an upper boundary of a current CTU row, wherein a value range of a horizontal coordinate is [0, pic_w−1] and a vertical coordinate is y;
• coordinates of a pixel of a left boundary of a current CTU, wherein a horizontal coordinate is x and a value range of a vertical coordinate is [y, y+ctu_h−1]);
• or
• coordinates of a pixel of an upper boundary of a current CTU, wherein a value range of a horizontal coordinate is [x, x+ctu_w−1] and a vertical coordinate is y, wherein
• coordinates of an upper left corner of the current CTU are (x, y), a width of the picture is pic_w, a height of the picture is pic_h, a width of the current CTU is ctu_w, and a height of the current CTU is ctu_h.