Method for encoding video information and method for decoding video information, and apparatus using same

Patent metadata

Field	Value
Publication number	US-11889052-B2
Application number	US-202217590161-A
Country	US
Kind code	B2
Filing date	Feb 1, 2022
Priority date	Dec 31, 2010
Publication date	Jan 30, 2024
Grant date	Jan 30, 2024

Abstract

A method for coding image information includes generating prediction information by predicting information on a current coding unit, and determining whether the information on the current coding unit is the same as the prediction information. When the information on the current coding unit is the same as the prediction information, a flag indicating that the information on the current coding unit is the same as the prediction information is coded and transmitted. When the information on the current coding unit is not the same as the prediction information, a flag indicating that the information on the current coding unit is not the same as the prediction information and the information on the current coding unit are coded and transmitted. At the generating of the prediction information, the prediction information is generated by using the information on the coding unit neighboring to the current coding unit.

First claim

The invention claimed is:

1. A method of decoding video information, the method comprising:
generating an occurrence probability of a split flag for a current coding unit based on a split depth value for one or more spatial neighboring blocks of the current coding unit,
wherein the split flag indicates whether a coding unit is split and the split depth value indicates a depth level of a coding unit according to the split flag, and
wherein the coding unit is not split when the split flag is equal to 0, and the coding unit is split into four coding units with half horizontal and vertical size of the coding unit when the split flag is equal to 1;
performing entropy decoding of the split flag on the current coding unit based on the generated occurrence probability;
decoding a prediction flag indicating whether information of the current coding unit is the same as prediction information derived from information of a temporal neighboring block of the current coding unit, the information of the current coding unit including a motion vector of the current coding unit;
determining the information of the current coding unit based on the decoded prediction flag; and
performing inter-prediction of the current coding unit based on the determined information of the current coding unit,
wherein, when the information of the current coding unit is the same as the prediction information derived from information of the temporal neighboring block, the information of the current coding unit is determined to be the prediction information, and each of a first reference index and a second reference index for the current coding unit has a specific value indicating a specific reference frame of a current frame to which the current coding unit belongs, based on that two lists of reference frames are used for the current coding unit,
wherein the current coding unit is decoded based on a temporally previous frame and a temporally subsequent frame of the current frame, the temporally previous frame being indicated by the first reference index and the temporally subsequent frame being indicated by the second reference index, and
wherein, when the information of the current coding unit is different from the prediction information derived from information of the temporal neighboring block, the information of the current coding unit is derived by adding a difference value obtained from a bitstream to the prediction information.

2. A method of encoding video information, the method comprising:
generating an occurrence probability of a split flag for a current coding unit based on a split depth value for one or more spatial neighboring blocks of the current coding unit,
wherein the split flag indicates whether a coding unit is split and the split depth value indicates a depth level of a coding unit according to the split flag, and
wherein the coding unit is not split when the split flag is equal to 0, and the coding unit is split into four coding units with half horizontal and vertical size of the coding unit when the split flag is equal to 1;
performing entropy encoding of the split flag on the current coding unit based on the generated occurrence probability;
performing inter-prediction of the current coding unit based on information of the current coding unit, the information of the current coding unit including a motion vector of the current coding unit; and
encoding a prediction flag into a bitstream, the prediction flag indicating whether the information of the current coding unit is the same as prediction information derived from information of a temporal neighboring block of the current coding unit;
wherein, when the information of the current coding unit is the same as the prediction information derived from information of the temporal neighboring block, the information of the current coding unit is not encoded into the bitstream, each of a first reference index and a second reference index for the current coding unit has a specific value indicating a specific reference frame of a current frame to which the current coding unit belongs, based on that two lists of reference frames are used for the current coding unit, and
the current coding unit is encoded based on a temporally previous frame and a temporally subsequent frame of the current frame, the temporally previous frame being indicated by the first reference index and the temporally subsequent frame being indicated by the second reference index,
wherein, when the information of the current coding unit is different from the prediction information derived from information of the temporal neighboring block, a difference value between the information of the current block and the prediction information that is encoded into the bitstream.

3. A method of transmitting a bitstream generated by a method of encoding video information, the method of encoding video information comprising:
generating an occurrence probability of a split flag for a current coding unit based on a split depth value for one or more spatial neighboring blocks of the current coding unit,
wherein the split flag indicates whether a coding unit is split and the split depth value indicates a depth level of a coding unit according to the split flag, and
wherein the coding unit is not split when the split flag is equal to 0, and the coding unit is split into four coding units with half horizontal and vertical size of the coding unit when the split flag is equal to 1;
performing entropy encoding of the split flag on the current coding unit based on the generated occurrence probability;
performing inter-prediction of the current coding unit based on information of the current coding unit, the information of the current coding unit including a motion vector of the current coding unit; and
encoding a prediction flag into the bitstream, the prediction flag indicating whether the information of the current coding unit is the same as prediction information derived from information of a temporal neighboring block of the current coding unit;
wherein, when the information of the current coding unit is the same as the prediction information derived from information of the temporal neighboring block, the information of the current coding unit is not encoded into the bitstream, each of a first reference index and a second reference index for the current coding unit has a specific value indicating a specific reference frame of a current frame to which the current coding unit belongs, based on that two lists of reference frames are used for the current coding unit, and
the current coding unit is encoded based on a temporally previous frame and a temporally subsequent frame of the current frame, the temporally previous frame being indicated by the first reference index and the temporally subsequent frame being indicated by the second reference index,
wherein, when the information of the current coding unit is different from the prediction information derived from information of the temporal neighboring block, a difference value between the information of the current block and the prediction information that is encoded into the bitstream.

Assignees

• Electronics & Telecommunications Res Inst
• Univ—Industry Cooperation Group Of Kyung Hee Univ
• Univ Industry Cooperation Group Kyung Hee Univ

Inventors

• Jeong Se Yoon
• Kim Hui Yong
• Lim Sung Chang
• Lee Jin Ho
• Lee Ha Hyun
• Kim Jong Ho
• Choi Jin Soo
• Kim Jin Woong
• Ahn Chie Teuk
• Park Gwang Hoon
• Kim Kyung Yong
• Lee Han Soo
• Kim Tae Ryong

Classifications

• H04N19/10 Primary

  using adaptive coding · CPC title

• H04N19/105 Primary

  Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction · CPC title

• H04N19/136

  Incoming video signal characteristics or properties · CPC title

• H04N19/197

  including determination of the initial value of an encoding parameter (H04N19/56 takes precedence) · CPC title

• H04N19/196

  being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters (processing of motion vectors H04N19/513) · CPC title