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13th Meeting: Marrakech, January 2019 2019-01-12 18:01
Non-CE7 : Sign coding for transform skip
Authors: S. Yoo LGE J. Choi LGE Jin Heo LGE J. Choi LGE Ling Li LGE J. Lim LGE S. Kim LGE
Abstract
An efficient sign coding for transform skip mode is proposed in this contribution. It is observed that the signs of coefficients in the transform skip block have high correlation each other than those of transformed coefficients. Therefore, it is proposed to have a flag that indicates whether all of the signs in the current block are identical or not, before the signs of each coefficient are coded. The proposed method has BD-bitrate changes, 0.00%, 0.00%, 0.04%, for AI, RA, and LDB, respectively. Especially, it is observed that the proposed scheme has -0.30% and -0.81% of bit savings in Class F and Class SCC in all intra configuration, respectively.
Meeting Notes
JVET-M0279 Non-CE7: Sign coding for transform skip [S. Yoo, J. Choi, J. Heo, J. Choi, L. Li, J. Lim, S. Kim (LGE)]
Cited:
JVET-M0027 X JVET-M0649 X JVET-M1028 JVET-N0429 JVET-N0763 JVET-P0479
ARCHIVE v2 :
JVET-M0279.pdf JVET-M0279_v2.docx JVET-M0279_v2.XLSM
Decisions
JVET-M0279 Non-CE7: Sign coding for transform skip [S. Yoo, J. Choi, J. Heo, J. Choi, L. Li, J. Lim, S. Kim (LGE)]
Citation
14th Meeting: Geneva, March 2019 2019-03-22 14:02
CE8-related: Joint proposal for transform skip (CE8-4.1c, JVET-M0279 and JVET-N0094)
Authors: S. Yoo LGE J. Choi LGE Jin Heo LGE J. Choi LGE J. Lim LGE S. Kim LGE Mohammed Golam Sarwer MediaTek Olena Chubach MediaTek C. -W. Hsu MediaTek Y. -W. Huang MediaTek Shawmin Lei MediaTek
Abstract
This contribution shows the results of combined tests of the CE8-4.1c, JVET-M0279 and JVET-N0094. The CE8-4.1 reorders residuals for intra predicted and transform skipped blocks. JVET-M0279 proposed a flag that indicates whether all of the signs in the current block are identical or not. JVET-N0094 proposed to derive the context models for coefficient coding from three previously decoded neighboring coefficients located at the right, bottom, and bottom-right positions of the current to-be-decoded coefficient. A separate context set is defined for transform skip mode. The experimental results for joint tests are reported in the tables below:
Meeting Notes
JVET-N0763 CE8-related: Joint proposal for transform skip (CE8-4.1c, JVET-M0279 and JVET-N0094) [S. Yoo, J. Choi, J. Heo, J. Choi, J. Lim, S. Kim (LGE), M. G. Sarwer, O. Chubach, C. -W. Hsu, Y. -W. Huang, S.-M. Lei (MediaTek)] [late]
References:
JVET-M0279 JVET-M1028 JVET-N0094 JVET-N0428
PATENTS:
EP3922033B1 0.71 2025-01-15 CN113632493B 0.71 2024-07-12 JP7448559B2 0.70 2024-03-12 US9264713B2 0.70 2016-02-16 US9426466B2 0.70 2016-08-23 US9549182B2 0.32 2017-01-17 US11575940B2 0.26 2023-02-07 RU2740863C2 0.22 2021-01-21
ARCHIVE v2 :
JVET-M0763_v1.pdf JVET-N0763.docx JVET-N0763_Test1_ibc0.XLSM JVET-N0763_Test1_ibc1.XLSM JVET-N0763_Test1_ibc1_v2.XLSM JVET-N0763_Test2_ibc0.XLSM JVET-N0763_Test2_ibc1.XLSM JVET-N0763_Test2_ibc1_v2.XLSM
Decisions
JVET-N0763 CE8-related: Joint proposal for transform skip (CE8-4.1c, JVET-M0279 and JVET-N0094) [S. Yoo, J. Choi, J. Heo, J. Choi, J. Lim, S. Kim (LGE), M. G. Sarwer, O. Chubach, C. -W. Hsu, Y. -W. Huang, S.-M. Lei (MediaTek)] [late]
Citation
13th Meeting: Marrakech, January 2019 2019-01-14 15:59
Crosscheck of JVET-M0279 (Non-CE7 : Sign coding for transform skip)
Authors: Felix Henry Orange Gordon Clare Orange
Abstract
This document reports the crosscheck of JVET-M0279 (Non-CE7 : Sign coding for transform skip). The crosscheck results match the ones provided by the proponent and the source code was examined).
Meeting Notes
JVET-M0649 Crosscheck of JVET-M0279 (Non-CE7: Sign coding for transform skip) [F. Henry, G. Clare (Orange)] [late]
References:
JVET-M0279
Cited:
JVET-N0649 X
ARCHIVE v2 :
JVET-M0649.xlsm JVET-M0649r1.docx
Decisions
JVET-M0649 Crosscheck of JVET-M0279 (Non-CE7: Sign coding for transform skip) [F. Henry, G. Clare (Orange)] [late]
Citation
14th Meeting: Geneva, March 2019 2019-04-18 10:40
Description of Core Experiment 11 (CE11): Gradual random access
Authors: Kimihiko Kazui Jean-Marc Thiesse Hendry K. Kawamura
Abstract
This document provides description for core experiment 11 (CE11). The objective of CE11 is to investigate the various methods for supporting gradual random access (GRA) in VVC and implementation of those methods on top of VTM reference software.
Meeting Notes
JVET-N1031 Description of Core Experiment 11 (CE11): Gradual random access [K. Kazui, J.-M. Thiesse, Hendry, K. Kawamura] New – the previous CE11 was subsumed under CE5. The previous CE12 (Tile set boundary MC handling) was discontinued as per discussion on HLS topics. It was emphasized that those CEs which plan subjective testing to study JVET-N0835 which points to some issues of selecting the test conditions for that. Future meeting plans, expressions of thanks, and closing of the meeting Future meeting plans were established according to the following guidelines: Meeting under ITU-T SG 16 auspices when it meets (starting meetings on the Tuesday of the first week and closing it on the Wednesday of the second week of the SG 16 meeting – a total of 9 meeting days), and Otherwise meeting under ISO/IEC JTC 1/SC 29/WG 11 auspices when it meets (starting meetings on the Wednesday prior to su...
References:
JVET-N0080 JVET-N0115 JVET-N0116 JVET-N0310 JVET-N0391
Cited:
JVET-P0193
ARCHIVE v2 :
JVET-N1031-v2.docx
Decisions
Jian Qing Zhu (Fujitsu R&D Center)
Citation
13th Meeting: Marrakech, January 2019 2019-02-11 08:21
Description of Core Experiment 13 (CE13): Neural Network based Filter for Video Coding
Authors: Yun Li Shan Liu K. Kawamura
Abstract
The purpose of this Core Experiment (CE) is to investigate the coding tools related to neural network (NN) based loop filter on top of the Test Model. In this CE, the impact of the position of the NN based filter in the filter chain, the benefit of the CTU level NN filter adaptive on/off switching, and the generalization capability when QP is different from the training QP will be investigated. In addition to the encoder and decoder run-times, the network information, e.g., network parameter numbers, number of layers, and convolution kernel size will also be evaluated. The list of tools and experiments to be performed are detailed in this document.
Meeting Notes
JVET-M1033 Description of Core Experiment 13 (CE13): Neural-network based loop filtering [Y. Li, S. Liu, K. Kawamura] Future meeting plans, expressions of thanks, and closing of the meeting Future meeting plans were established according to the following guidelines: Meeting under ITU-T SG 16 auspices when it meets (starting meetings on the Tuesday of the first week and closing it on the Wednesday of the second week of the SG 16 meeting – a total of 9 meeting days), and Otherwise meeting under ISO/IEC JTC 1/SC 29/WG 11 auspices when it meets (starting meetings on the Wednesday prior to such meetings and closing it at lunchtime on the last day of the WG 11 meeting – a total of 9.5 meeting days). In cases where an exceptionally high workload is expected for a meeting, an earlier starting date may be defined. Some specific future meeting plans (to be confirmed) were established as follows: T...
References:
JVET-M0159 JVET-M0351 JVET-M0508 JVET-M0510 JVET-M0566 JVET-M0872 JVET-M1006 JVET-M1010
Cited:
JVET-N0110 JVET-N0254 JVET-N0480 JVET-N0513 JVET-N0710
ARCHIVE v2 :
JVET-M1033-v2-clean.docx JVET-M1033-v2.docx
Decisions
Jian Qing Zhu (Fujitsu R&D Center)
Citation
13th Meeting: Marrakech, January 2019 2019-01-17 14:51
BoG report on CE7 related contributions
Authors: Y. Ye

Abstract not available in document

Meeting Notes
JVET-M0891 BoG report on CE7 related quantization and coefficient coding contributions [Y. Ye] This report was discussed in Track A Thursday 17 January 1700-1800 (chaired by GJS). There were 13 technical contributions in the CE7 related category. These contributions are classified into the following three categories: Rice parameter related Complexity reduction and simplification Coding efficiency The first BoG session was held 1900–2345 on January 14 2019 in Saba. The second BoG session was held 1300–1400 on January 17 2019 in Saba. Section 1 of this document summarizes the BoG’s recommendations. Section 2 of this document contains detailed notes on BoG discussion. Recommended adoptions: JVET-M0470, CE7-related: Golomb-Rice/exponential Golomb coding for abs_remainder and dec_abs_level syntax elements In VTM 3.0, worst case is 33 bits for abs_gt3_level_flag, and 35 bits for dec_abs_level...
ARCHIVE v3 :
JVET-M0891-v2.docx
Decisions
This was discussed in Track A when determining which CEs to conduct.
See section 6.7.
Citation
13th Meeting: Marrakech, January 2019 2019-01-15 17:54
Non-CE8: Unified Transform Type Signalling and Residual Coding for Transform Skip
Authors: B. Bross HHI T. Nguyen HHI P. Keydel HHI Heiko Schwarz HHI Detlev Marpe HHI Thomas Wiegand HHI
Abstract
This contribution proposes two modifications related to transform type signalling and residual coding for transform skip. The first modification includes aligning the cases in which transform skip (TS) and multiple transform selection (MTS) apply. This limits TS to luma transform blocks as well as extends it to transform block sizes up to 32x32. The second modification constitutes of a modified transform coefficient level coding for the TS residual. Relative to the regular residual coding case, the residual coding for TS includes no signalling of the last x/y position, coded_sub_block_flag coded for every subblock, sig_coeff_flag context modelling with reduced template, a single context model for abs_level_gt1_flag and par_level_flag, context modeling for the sign flag, additional greater than 5, 7, 9 flags, modified Rice parameter derivation for the remainder binarization and a limit for the number of context coded bins per sample. The proposed joint signalling (first modification) provides on average (BD-rate Y, enc. time, dec.time):
Meeting Notes
JVET-M0464 Non-CE8: Unified Transform Type Signalling and Residual Coding for Transform Skip [B. Bross, T. Nguyen, P. Keydel, H. Schwarz, D. Marpe, T. Wiegand (HHI)] This contribution proposes two modifications related to transform type signalling and residual coding for transform skip. The first modification includes aligning the cases in which transform skip (TS) and multiple transform selection (MTS) apply. This limits TS to luma transform blocks as well as extends it to transform block sizes up to 32x32. The second modification constitutes of a modified transform coefficient level coding for the TS residual. Relative to the regular residual coding case, the residual coding for TS includes no signalling of the last x/y position, coded_sub_block_flag coded for every subblock, sig_coeff_flag context modelling with reduced template, a single context model for abs_level_gt1_flag and par_l...
References:
JVET-L1010 JVET-L1028 JVET-M0072 JVET-M0708
Cited:
JVET-M0011 JVET-M0028 X JVET-M0650 X JVET-M0708 X JVET-M0834 X JVET-M0877 JVET-M1001 JVET-M1002 JVET-M1026 JVET-M1028 JVET-N0002 JVET-N0003 JVET-N0013 JVET-N0026 JVET-N0028 X JVET-N0075 JVET-N0076 JVET-N0077 JVET-N0078 JVET-N0079 more than 20
ARCHIVE v4 :
._JVET-M0464-TS32Y_CPR0.xlsm ._JVET-M0464-uniMTS-DraftText_r1.docx ._JVET-M0464-uniMTS-Nt2_CPR0.xlsm ._JVET-M0464-uniMTS-Nt3_CPR0.xlsm ._JVET-M0464-uniMTS-Nt3_CPR1.xlsm ._JVET-M0464-uniMTS-Nt3_TSRC_CCB2_CPR0.xlsm ._JVET-M0464-uniMTS-Nt3_TSRC_CCB3_CPR0.xlsm ._JVET-M0464-uniMTS-Nt3_TSRC_CCB3_CPR0_r1.xlsm ._JVET-M0464-uniMTS-Nt3_TSRC_CCB8_CPR0.xlsm ._JVET-M0464-uniMTS-Nt3_TSRC_CCB8_CPR1.xlsm ._JVET-M0464-uniMTS-Nt4_CPR0.xlsm ._JVET-M0464-uniMTS-Nt5_CPR0.xlsm ._JVET-M0464-v4.docx ._JVET-M0464_r1.pdf JVET-M0464-TS32Y_CPR0.xlsm JVET-M0464-uniMTS-DraftText_r1.docx JVET-M0464-uniMTS-Nt2_CPR0.xlsm JVET-M0464-uniMTS-Nt3_CPR0.xlsm JVET-M0464-uniMTS-Nt3_CPR1.xlsm JVET-M0464-uniMTS-Nt3_TSRC_CCB2_CPR0.xlsm JVET-M0464-uniMTS-Nt3_TSRC_CCB3_CPR0.xlsm JVET-M0464-uniMTS-Nt3_TSRC_CCB3_CPR0_r1.xlsm JVET-M0464-uniMTS-Nt3_TSRC_CCB8_CPR0.xlsm JVET-M0464-uniMTS-Nt3_TSRC_CCB8_CPR1.xlsm JVET-M0464-uniMTS-Nt4_CPR0.xlsm JVET-M0464-uniMTS-Nt5_CPR0.xlsm JVET-M0464-v4.docx JVET-M0464_r1.pdf
Decisions
adopted
Later, results with a CPR-on anchor were reported. It was demonstrated that large-block TS still provides a benefit for screen content (1.6%, 4.9% for F/TGM in AI, 1.7%, 5.9% for LD). The adoption is reported elsewhere (from Track A).
adopted
Adopt (modified as noted)
Citation
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