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Image encoding method, image decoding method, image encoding device, and image decoding device

A decoding method and a technology for decoding objects, which are applied in the fields of image encoding, image decoding, image encoding devices and image decoding devices, can solve problems such as inability to obtain sufficiently high encoding efficiency, and achieve the effect of improving encoding efficiency

Active Publication Date: 2017-05-10
SUN PATENT TRUST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, in conventional image coding methods, there are cases where sufficiently high coding efficiency cannot be obtained.

Method used

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  • Image encoding method, image decoding method, image encoding device, and image decoding device
  • Image encoding method, image decoding method, image encoding device, and image decoding device
  • Image encoding method, image decoding method, image encoding device, and image decoding device

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Embodiment approach 1

[0130] Figure 5 It is a block diagram of the image encoding device of this embodiment. Figure 5 The illustrated image encoding device 500 encodes an image for each block, and outputs an encoded stream including the encoded image. Specifically, the image encoding device 500 includes a subtraction unit 501, a transformation unit 502, a quantization unit 503, an entropy encoding unit 504, an inverse quantization unit 505, an inverse transformation unit 506, an addition unit 507, a block memory 508, a picture memory 509, a frame An intra prediction unit 510 , an inter prediction unit 511 , and a selection unit 512 .

[0131] The subtraction unit 501 outputs a differential image by subtracting a predicted image from an image input to the image encoding device 500 . The conversion unit 502 generates a plurality of frequency coefficients by performing frequency conversion on the difference image output from the subtraction unit 501 . The quantization unit 503 generates a plurali...

Embodiment approach 2

[0189] The configurations of the image encoding device and the image decoding device of the present embodiment are the same as those of the first embodiment. Therefore, using Figure 5 The structure of the image encoding device 500 and Image 6 These operations of the present embodiment will be described with reference to the configuration of the image decoding device 600 .

[0190] In addition, the image coding device 500 of the present embodiment performs Figure 7 action shown. In addition, the image decoding device 600 of the present embodiment performs Figure 8 action shown. In this embodiment, the derivation process of the predictive motion vector is different from that in the first embodiment. Details are given below.

[0191] Figure 10 It is a flowchart showing the details of the export processing in this embodiment. The inter prediction unit 511 of this embodiment replaces Figure 9 perform the actions shown Figure 10 action shown. The following mainly sho...

Embodiment approach 3

[0221] The configurations of the image encoding device and the image decoding device of the present embodiment are the same as those of the first embodiment. Therefore, using Figure 5 The structure of the image encoding device 500 and Image 6 These operations of the present embodiment will be described with reference to the configuration of the image decoding device 600 .

[0222] In addition, the image coding device 500 of the present embodiment performs Figure 7 action shown. In addition, the image decoding device 600 of the present embodiment performs Figure 8 action shown. In this embodiment, the derivation process of the predictive motion vector is different from that in the first embodiment. Details are given below.

[0223] Figure 12 It is a flowchart showing the details of the export processing in this embodiment. The inter prediction unit 511 of this embodiment replaces Figure 9 perform the actions shown Figure 12 action shown. The following mainly sho...

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Abstract

An image coding method, comprising: a deriving step (S1301), deriving a candidate for predicting a motion vector from a co-located motion vector; an adding step (S1302), adding the candidate to a list; a selecting step (S1303), selecting a prediction from the list motion vector; and an encoding step (S1304), encoding the current block and encoding the current motion vector; in the deriving step (S1301), when it is determined that the current reference picture and the co-located reference picture are long-term reference pictures respectively Next, candidates are derived by the first derivation method, and when it is determined that the current reference picture and the co-located reference picture are short-term reference pictures, candidates are derived by the second derivation method.

Description

technical field [0001] The present invention relates to an image coding method for separately coding a plurality of blocks in a plurality of pictures. Background technique [0002] As a technology related to an image coding method for coding a plurality of blocks in a plurality of pictures, there is a technology described in Non-Patent Document 1. [0003] prior art literature [0004] non-patent literature [0005] Non-Patent Document 1: ISO / IEC 14496-10 "MPEG-4 Part10 Advanced Video Coding" [0006] Summary of the invention [0007] The problem to be solved by the invention [0008] However, in conventional image coding methods, there are cases where sufficiently high coding efficiency cannot be obtained. Contents of the invention [0009] Here, the present invention provides an image encoding method capable of improving encoding efficiency in encoding an image. [0010] means to solve the problem [0011] An image coding method according to one aspect of the pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/58H04N19/52
CPCH04N19/52H04N19/58H04N19/61H04N19/51H04N19/513H04N19/172H04N19/176H04N19/56
Inventor 袁明亮林宗顺乃苏孟德孙海威杉尾敏康西孝启笹井寿郎柴原阳司谷川京子松延彻寺田健吾
Owner SUN PATENT TRUST