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14th Meeting: Geneva, March 2019 2019-04-09 08:46
CE8-4.1 : Rearrangement of the residual block 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
This contribution reports the results of test CE8-4.1, reordering residuals for intra predicted and transform skipped blocks. There are three methods - rearranging residuals by flipping (test a), rotating (test b), and combining flipping and rotating together (test c). The experimental results for this CE tests are reported in the tables below:
Meeting Notes
JVET-N0428 CE8-4.1: Rearrangement of the residual block for transform skip [S. Yoo, J. Choi, J. Heo, J. Choi, L. Li, J. Lim, S. Kim (LGE)]

In this test, the residual blocks which are not transformed (coefficient blocks defined in a pixel domain) are manipulated according to the prediction modes. General residual coding is designed for the transformed blocks so that the statistics of each syntax element may become undesirable when a transform-skipped block is coded, thus degrading the coding efficiency. When the currently coded block is intra-predicted, the intra prediction mode can be used for vertical / horizontal flip. In addition, rotating blocks and the combination of rearrangement methods are tested.

References:
JCTVC-N0044 JVET-L1010 JVET-M0278 JVET-M0464 JVET-M1001 JVET-M1028
Cited:
JVET-N0011 JVET-N0028 X JVET-N0122 JVET-N0742 JVET-N0763
ARCHIVE v2 :
CE8-4.1a-ibc0_tester.XLSM CE8-4.1a-ibc0_tester_LowQP.XLSM CE8-4.1a-ibc1_tester.XLSM CE8-4.1a-ibc1_tester_LowQP.XLSM CE8-4.1b-ibc0_tester.XLSM CE8-4.1b-ibc0_tester_LowQP.XLSM CE8-4.1b-ibc1_tester.XLSM CE8-4.1b-ibc1_tester_LowQP.XLSM CE8-4.1c-ibc0_tester.XLSM CE8-4.1c-ibc0_tester_LowQP.XLSM CE8-4.1c-ibc1-tester_LowQP.XLSM CE8-4.1c-ibc1_tester.XLSM JVET-N0428_spec.docx JVET-N0428_v1.docx JVET-N0428_v2.docx JVET-N0428_v2_clean.docx ~WRL2915.tmp
Decisions
In this test, the residual blocks which are not transformed (coefficient blocks defined in a pixel domain) are manipulated according to the prediction modes. General residual coding is designed for the transformed blocks so that the statistics of each syntax element may become undesirable when a transform-skipped block is coded, thus degrading the coding efficiency. When the currently coded block is intra-predicted, the intra prediction mode can be used for vertical / horizontal flip. In addition, rotating blocks and the combination of rearrangement methods are tested.
Citation