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Encoding device, decoding device, and program

An encoding device and a decoding device technology, which is applied in the field of encoding devices, can solve problems such as reduced encoding efficiency and reduced prediction accuracy, and achieve the effect of improving prediction accuracy

Inactive Publication Date: 2018-09-28
NIPPON HOSO KYOKAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] Therefore, when performing Figure 25 In the case of directional prediction shown in (b), part of the generated predicted image is composed of undecoded reference pixels filled by copying, so there is a problem that the prediction accuracy decreases and the coding efficiency decreases.

Method used

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  • Encoding device, decoding device, and program
  • Encoding device, decoding device, and program
  • Encoding device, decoding device, and program

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Experimental program
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no. 1 Embodiment approach

[0069] Below, refer to Figure 1 to Figure 5 Next, the encoding device 1 and the decoding device 3 according to the first embodiment of the present invention will be described. Here, the coding device 1 and the decoding device 3 according to the present embodiment are configured to support intra prediction in a video coding method such as HEVC. In addition, the coding device 1 and the decoding device 3 according to the present embodiment are configured to support any video coding method as long as the video coding method is a video coding method that performs intra prediction.

[0070] The encoding device 1 according to the present embodiment is configured to divide and encode an original image in frame units constituting a moving image into CUs. In addition, the encoding device 1 according to the present embodiment is configured to be able to divide a CU into a plurality of TUs.

[0071] In addition, in the present embodiment, the configuration is such that, in the CU that ...

no. 2 Embodiment approach

[0126] Below, refer to Figure 6 ~ Figure 8 Next, the encoding device 1 and the decoding device 3 according to the second embodiment of the present invention will be described focusing on differences from the encoding device 1 and the decoding device 3 according to the first embodiment described above.

[0127] In the encoding device 1 according to this embodiment, the encoding order control unit 13 may be configured such that when the division determination unit 12 determines to divide the CU into a plurality of TUs, as follows Figure 6 (a)~ Figure 6 As shown in (d), when the direction of the prediction mode determined by the prediction mode determination unit 11 is from the lower left to the upper right (that is, when the direction prediction is performed from the lower left to the upper right), as the encoding of the TU in the CU order, instead of the conventional raster scan order (e.g. Figure 13 Z type shown), but from TU#A3 (lower left TU in CU#A)→TU#A4 (lower right...

no. 3 Embodiment approach

[0159] Below, refer to Figure 9 ~ Figure 10 Next, the encoding device 1 and the decoding device 3 according to the third embodiment of the present invention will be described focusing on differences from the encoding device 1 and the decoding device 3 according to the second embodiment described above.

[0160] In the encoding device 1 according to the present embodiment, a predetermined encoding order different from the conventional raster scan order may be used depending on the direction of the prediction mode, and the left and upper sides of the encoding target TU may be configured to be different. If all reference pixels adjacent to the side and right side or all reference pixels adjacent to the left side, upper side, and lower side of the current TU have been decoded, the prediction unit 14a changes to use all available reference pixels. Other pre-specified predictions such as linear interpolation of pixels are used to perform intra-frame prediction.

[0161] For exampl...

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Abstract

To improve prediction accuracy and encoding efficiency without increasing the amount of information transmitted by an encoding device, and without increasing the calculation time on the encoding device side. This encoding device 1 comprises: an encoding order control unit 12 that is configured to determine an encoding order of TU#A1 to TU#A4 within CU#A on the basis of a prediction mode; and a decoded image generation unit 14 that is configured to generate a decoded image on the basis of the encoding order and a method of dividing CU#A into TU#A1 to TU#A4.

Description

technical field [0001] The present invention relates to an encoding device, a decoding device, and a program. Background technique [0002] Conventionally, studies have been conducted on encoding methods in order to compress the data volume when transmitting or storing still images and moving images (video). [0003] In recent years, among video coding technologies, the popularization of ultra-high-resolution video represented by 8K-SHV (Super Hi-Vision, super high-definition) is also advancing. As a method of network transmission, encoding methods such as H.264 / AVC (Advanced Video Coding) and H.265 / HEVC (High Efficiency Video Coding) are known. [0004] The moving image (video) coding method represented by H.265 / HEVC (High Efficiency Video Coding) is configured to perform prediction while switching between two types of prediction, inter prediction and intra prediction, and generate a residual After receiving the signal, the stream (stream) obtained by performing orthogona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/129H04N19/159H04N19/176H04N19/593
CPCH04N19/129H04N19/119H04N19/593H04N19/176H04N19/11H04N19/159H04N19/124H04N19/172H04N19/45
Inventor 岩村俊辅根本慎平市谷敦郎松尾康孝
Owner NIPPON HOSO KYOKAI
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