Title:
IMAGE PROCESSING DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2020/066641
Kind Code:
A1
Abstract:
The present disclosure relates to an image processing device and method that make it possible to more easily perform a one-dimensional transform or an inverse one-dimensional transform. A sign inversion operation is performed with respect to a one-dimensional signal train of coefficient data. When a one-dimensional transform of a first transform type is implemented with respect to the one-dimensional signal train that has been subjected to the sign inversion operation, a transform matrix of a second transform type for implementing the one-dimensional transform of the first transform type by an FTS operation is defined as a base transform matrix, whereas when a one-dimensional transform of a third transform type is implemented, a transform matrix which is of a fourth transform type for implementing the one-dimensional transform of the third transform type by the FTS operation and which is a symmetric matrix is defined as the base transform matrix. A matrix computation is performed using the base transform matrix, and a flip operation is performed with respect to the one-dimensional signal train that has been subjected to the matrix computation. The present disclosure is applicable, for example, to an image processing device, an image encoding device, or an image decoding device.
Inventors:
TSUKUBA TAKESHI (JP)
Application Number:
PCT/JP2019/035818
Publication Date:
April 02, 2020
Filing Date:
September 12, 2019
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
H04N19/60
Foreign References:
| JP2014036278A | 2014-02-24 |
Other References:
TAKESHI TSUKUBA ET AL.: "CE6-related: AMT with only type2/type4 DCT/DST", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, no. JVET-K0394-v2, 15 July 2018 (2018-07-15), Ljubljana, SI, pages 1 - 7, XP030197343
TAKESHI TSUKUBA ET AL.: "CE6: Transform Matrix Replacement (CE 6. 1. 8. 1)", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, no. JVET-K00123-v2, 3 July 2018 (2018-07-03), Ljubljana, SI, pages 1 - 11, XP030198794
KIYOFUMI ABE ET AL.: "CE6-related: Type4 only AMT", JOINT VIDEO EXPLORATION TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, no. JVET-K0130-v1, 2 July 2018 (2018-07-02), Ljubljana, SI, pages 1 - 7, XP030195622
K. NASER ET AL.: "CE6: Report of CE6. 1. 3 (Transform reduction in AMT), with further reduction via DST-IV inheritance", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, no. JVET-K0264r2, 10 July 2018 (2018-07-10), Ljubljana, SI, pages 1 - 4, XP030196491
K. NASER ET AL.: "CE6-related: Reduction of the number of core transforms in AMT", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, no. JVET-K0265r1, July 2018 (2018-07-01), Ljubljana, SI, pages 1 - 5, XP030195839
TAKESHI TSUKUBA ET AL.: "CE6: Transform Matrix Replacement (CE 6. 1. 8. 1)", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, no. JVET-K00123-v2, 3 July 2018 (2018-07-03), Ljubljana, SI, pages 1 - 11, XP030198794
KIYOFUMI ABE ET AL.: "CE6-related: Type4 only AMT", JOINT VIDEO EXPLORATION TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, no. JVET-K0130-v1, 2 July 2018 (2018-07-02), Ljubljana, SI, pages 1 - 7, XP030195622
K. NASER ET AL.: "CE6: Report of CE6. 1. 3 (Transform reduction in AMT), with further reduction via DST-IV inheritance", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, no. JVET-K0264r2, 10 July 2018 (2018-07-10), Ljubljana, SI, pages 1 - 4, XP030196491
K. NASER ET AL.: "CE6-related: Reduction of the number of core transforms in AMT", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, no. JVET-K0265r1, July 2018 (2018-07-01), Ljubljana, SI, pages 1 - 5, XP030195839
Attorney, Agent or Firm:
NISHIKAWA Takashi et al. (JP)
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