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Method and device for encoding motion vector and method and device for encoding/decoding image using it

A motion vector and motion vector prediction technology, applied in image communication, television, electrical components, etc., can solve the problems of reduced compression efficiency and increased bit volume, and achieve the effect of improving efficiency

Active Publication Date: 2011-12-07
SK TELECOM CO LTD
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Problems solved by technology

Therefore, the amount of generated bits increases and the compression efficiency decreases
Also, when the encoder additionally encodes the information of the predicted motion vector to reduce the differential motion vector, the amount of bits required to encode the additional information increases, resulting in lower compression efficiency

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Embodiment Construction

[0038] Various aspects of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, the same elements will be denoted by the same reference numerals although shown in different drawings. Also, in the following description of the present disclosure, descriptions of known functions and configurations incorporated herein will be omitted when it would make the subject matter of the present disclosure more unclear.

[0039] Also, in the description of the components of the present disclosure, expressions like first, second, A, B, (a) and (b) will be used. These are only for distinguishing one component from another without implying or suggesting the nature, sequence or sequence of the components. If one component is described as being "connected" or "coupled" to another component, they can mean that the component is not only directly "connected" or "coupled", but also indirectly "connected" or "coupled" throu...

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Abstract

The present invention relates to a method and to an apparatus for encoding a motion vector, and to a method and to an apparatus for encoding / decoding an image using same. The apparatus for encoding the motion vector according to the present invention comprises: a prediction candidate selector for selecting one or more motion vector prediction candidates; a prediction motion vector determiner for determining a prediction motion vector from among the one or more motion vector prediction candidates; and a differential motion vector encoder for calculating a differential motion vector by subtracting the determined prediction motion vector from the present motion vector, and encoding the differential motion vector.The present invention encodes a motion vector by using the prediction motion vector which is more accurately predicted, and reduces the bitrate for encoding information on the prediction motion vector, thus improving compression efficiency.

Description

technical field [0001] The present disclosure relates to a method and apparatus for encoding a motion vector, and a method and apparatus for encoding / decoding images using it. More specifically, the present disclosure relates to a method and apparatus for performing intra prediction using pixels reconstructed by encoding and decoding prior to a block currently to be encoded, efficiently Encoding and decoding are performed, and data of a still image or video is encoded or decoded using the encoded or decoded motion vector. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not represent prior art. [0003] Methods for efficiently compressing image signals include JPEG and JPEG-2000 for still images, and H.261, H.263, MPEG-2, and MPEG-4 for moving images. Furthermore, the International Organization for Standardization (ISO: International Standardization Organization) standardized MPEG-4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/32
CPCH04N7/26867H04N19/00696H04N19/0069H04N19/00781H04N7/26872H04N7/50H04N19/517H04N19/52H04N19/61H04N19/51H04N19/176H04N19/44H04N19/521H04N19/56
Inventor 金河润文柱禧李英烈金海光全炳宇金东元朴旻瞮
Owner SK TELECOM CO LTD
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