Image encoding/decoding method and apparatus, and recording medium for storing bitstream
A coding and usability technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of increased transmission cost and storage cost, improve compression efficiency, enhance coding and decoding efficiency, and improve image coding/decoding The effect of efficiency
Pending Publication Date: 2021-10-22
ELECTRONICS & TELECOMM RES INST
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[0048] The present invention can be variously modified and there are various embodiments of the present invention, examples of which will now be provided and described in detail with reference to the accompanying drawings. However, the present invention is not limited thereto although the exemplary embodiments can be construed as including all modifications, equivalents or substitutions within the technical idea and technical scope of the present invention. Like reference numerals refer to the same or similar functionality in various respects. In the drawings, the shapes and sizes of elements may be exaggerated for clarity. In the following detailed description of the invention, reference is made to the accompanying drawings, which show by way of illustrations specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure. It should be understood that the various...
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The present invention relates to an image encoding / decoding method and apparatus. An image decoding method according to the present invention comprises the steps of: acquiring symmetrical motion vector differential mode available information from a bitstream; acquiring first prediction direction zero motion vector differential information from the bitstream; acquiring symmetrical motion vector differential mode information of a current block from the bitstream on the basis of the symmetrical motion vector differential mode available information and the first prediction direction zero motion vector differential information; acquiring first prediction direction reference image index information, second prediction direction reference image index information, and a first prediction direction motion vector differential value on the basis of the symmetrical motion vector differential mode information; and generating a prediction block of the current block by using at least one of the first prediction direction reference image index information, the second prediction direction reference image index information, and the first prediction direction motion vector differential value, wherein in the step for acquiring the first prediction direction reference image index information, the second prediction direction reference image index information, and the first prediction direction motion vector differential value, the first prediction direction reference image index information, the second prediction direction reference image index information, and the first prediction direction motion vector differential value can be acquired by being derived from the bitstream rather than being decoded, when the symmetrical motion vector differential mode information of the current block indicates a symmetrical motion vector differential mode.
Description
technical field [0001] The present invention relates to an image encoding / decoding method and device, and a recording medium for storing bit streams. Background technique [0002] Recently, demands for high-resolution and high-quality images such as high-definition (HD) or ultra-high-definition (UHD) images have increased in various applications. As the resolution and quality of images increases, the amount of data increases accordingly. This is one of the reasons for the increase in transmission cost and storage cost when image data is transmitted through an existing transmission medium such as a wired or wireless broadband channel or when image data is stored. In order to solve these problems of high-resolution and high-quality image data, efficient image encoding / decoding techniques are required. [0003] Various video compression techniques exist, such as: inter-frame prediction technology, which predicts the value of pixels in the current image from the values of pi...
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IPC IPC(8): H04N19/51H04N19/105H04N19/91H04N19/176H04N19/119
CPCH04N19/52H04N19/577H04N19/70H04N19/51H04N19/105H04N19/91H04N19/176H04N19/119H04N19/137H04N19/157
Inventor 李河贤姜晶媛林成昶李镇浩金晖容
Owner ELECTRONICS & TELECOMM RES INST