Changes:

• JVET-N0477: N0220 LMCS simplifications
• JVET-N0477: LMCS cleanup
• add encoder config constraint for WrapAroundOffset to be a multiple of the minimum CU size
• JVET-N0332: MMVD Fix for LTRPs
• JVET-N0335: MV Rounding Unification
• JVET-N0137: Intra chroma partitioning restriction
• JVET-N0449: Simplification on MMVD distance table
• JVET-N0242: non-linear ALF (clipping)
• JVET-N0483: disable SBT in TPM
• JVET-N0481: BCW index inheritance for constructed affine merge candidate
• JVET-N0334: MV Overflow Prevention
• JVET-N0325: BDOF improvement
• JVET-N0271: simplified CCLM
• JVET-N0178 CE9-2.4 implicit BDOF split
• JVET-N0185: A Unified MPM List for Intra Mode Coding
• JVET-N600: AMVR flag and Triangle flag context reduction
• JVET-N0286: simplified gbi index coding
• JVET-N0188: Unified rice parameter derivation for coefficient level coding
• JVET-N0462: Fix context modeling of inter_pred_idc
• JVET-N0329: IBC Search Improvement
• JVET-N0318/N0467: IBC size
• JVET_N0317_ADD_ZERO_BV
• JVET-N0383/N0251: bug fix for ibc referring to collocated VPDU in left CTU
• JVET-N0175/N0251/N0384: Re-arrange IBC search range for small CTU sizes
• JVET-N0448/N0380: MMVD fix when MaxNumMergeCand is 1
• JVET-N0235: Added smvd flag in SPS
• JVET-N0266: remove 4x4 uni-pred, 4x8/8x4 bi-pred from regular inter modes.
• JVET-N0407: Disable 4xN/8x8 CUs for DMVR.
• JVET-N0235 bugfix
• JVET-N0470, SMVD RefIdxSymLX derivation, aligned software to spec text.
• JVET-N0146/N0162/N0442/N0153/N0262/N0440/N0086: applicable condition of DMVR and BDOF
• JVET-N0843: Block vector prediction simplification
• JVET-N0103: Coefficient group size harmonization
• JVET-N0280: residual coding for transform skip
• Enable repetition of parameter sets in CTC configs
• JVET-N0196: Use six tap filter for affine motion compensation
• JVET-N0671: Support of 4:4:4 and 4:2:2 chroma formats in VVC
• Refactor: align sps_fpel_mmvd_enabled_flag with spec text
• Added a config file parameter for ISP
• JVET-N0308: Maximum CU Size for ISP
• JVET-N0068: Affine memory bandwidth reduction
• JVET-N0246 method 6: modified quantization scales.
• JVET-N0127 : MMVD enabling flag in SPS
• JVET-N1011: Updated HDR configuration files to match CTC
• Intra-prediction clean-up requested by Ben and discussed at the meeting in Geneva
• JVET-N0213: TMVP removal at specific sizes
• JVET-N0054: Joint chroma residual mode
• JVET-N0168: AMVR cost calculation modification in motion estimation stage
• JVET-N0363: Modified cost criterion for intra encoder mode decision
• JVET-N0492: disallowing hierarchical CBFs signalling
• Adjust IBC local search range according to JVET-N0251 item4.
• JVET-N0324: on Regular Merge Flag
• JVET-N0473, JVET-N0098: Deblocking of ISP/SBT TU boundaries
• JVET-N0435: WAIP Harmonization
• JVET-N0180: line buffer reduction using symmetric padding
• JVET-N0340: regular merge candidate list is re-used for triangle
• JVET-N0866: unified transform derivation for ISP and implicit MTS - refactored
• JVET-N0302: Simplified CIIP
• JVET-N0247: Improvement of Hash Motion Estimation
• JVET-N0413/N0214: RDPCM
• JVET-N0400: Signal max number of triangle merge candidates
• JVET-N0217: matrix-based intra prediction (MIP)
• JVET-N0217: added missing 'isSameCtu' condition
• JVET-N0193: Low Frequency Non-Separable Transform (LFNST)
• JVET-N0105: LFNST context modelling
• JVET-N0415: CTB-based ALF switch
• Retrained CABAC initialization values
• Various bug fixes

Changes:

• removal of JVET-M macros

Changes:

• JVET-M0091: QPA-Finalization
• JVET-M0864: 2D Cache Model
• JVET-M0685: QP parameter predictor derivation
• JVET-M0111: disable GBI signalling when WP is enabled
• JVET-M0101: HLS starting point
• JVET-M0132: APS implementation
• JVET-M0113/M0188: quantization groups based on area
• JVET-M0415: MV wrap-around signaling implementation
• JVET_M0445: encoder-only MCTS
• parcat refactoring (re-use NAL (changed) unit type of CommonLib)
• fix parallel coding code under ENABLE_SPLIT_PARALLELISM macro
• verify bit depth of source video
• various cleanups and bug fixes

Changes:

• Fix tickets #153, #183, #185, #188, #190, #191, #193, #194, #195, #196, #197, #199, #200
• Add JVET-M0277 on PCM and loop filter
• Add JVET-M0428 on deblocking optimization
• Add JVET-M0451 on interop syntax
• Add JVET-M0600 on rate control
• Add encoder speedup for JVET-M0102 (ISP)
• Add macro to disable MMVD
• Other minor improvements

Changes:

• JVET-M0453: modified CABAC core engine
• JVET-M0090: change default C[b,r]QpOffsetDualTree to 0, change C[b,r]QpOffset to 1 for CTC
• JVET-M0421: Split-first signalling for partitioning
• JVET-M0464: UniMTS
• JVET-M0479: 18-bit Mv clip
• JVET-M0502: context for prediction mode flag
• JVET-M0407: CPR range extension
• JVET-M0173: moving gtr2 flag to first pass
• JVET-M0142: CCLM collocated- hroma
• JVET-M0068/M0171: MMVD cleanup
• JVET-M0064: CCLM Simplification
• JVET-M0444: SMVD
• JVET-M0446/M0888/M0905: VPDU constraint at picture boundary
• JVET-M0487: integer positions in extended region
• JVET-M0497: Fast DST-7/DCT-8 with dual implementation support
• JVET-M0170: shared merging list candidate
• JVET-M0409: ATMVP fix when IBC is on
• JVET-M0118/M0185/etc: on merge_triangle_flag redudant signaling when a CU uses MMVD or CIIP
• JVET-M0381 Test CE2.2.2.a: one context for Merge_subblock_idx (AffMergeIdx in VTM software)
• JVET-M0145: Affine MV clip
• JVET-M0512: TMVP storage reduction using floating-point representation
• JVET-M0228/M0166/M0477: Remove CPMV comparisons for construnted affine merge candidates
• JVET-M0265: MV rounding cleanup
• JVET-M0255: MMVD without Fractional Distances for SCC
• JVET-M0273 (change 1)/JVET-M0240/JVET-M0116 (method 1)/JVET-M0338(method 1)/JVET-M0204(method 2):Only use left neighbor for ATMVP offset derivation
• JVET-M0264: Harmonization between HMVP and GBi
• JVET-M0063: BDOF bitDepth bugfix
• JVET-M0328: Only keep the second weight group during TPM MC
• JVET-M0192: modifications - affine chroma MV is average of two luma sub-block MVs
• JVET-M0193: allow only the first pairwise candidate, remove the remaining five
• JVET-M0883: Using regular merge index signaling for triangle mode
• JVET-M0257: Scan only non zero-out regions of large TUs (width or height > 32)
• JVET-M0312/M0255: disable fractional MVD for UHD sequences
• JVET-M0823: encoder optimization for MMVD
• JVET-M0246: adaptive MV precision for affine inter mode
• JVET-M0470: Fixed transition point between GR and TU + EG(k) escape codes for coefficient
• JVET-M0839: increase number of SATD candidates in Affine Merge from 1 to 2
• JVET-M0238: Nearest neighbor instead of linear interpolation in PDPC
• JVET-M0281 test a: perform all AMVP rounding before pruning even if AMVR is off
• JVET-M0436: Reduce HMVP table size
• JVET-M0117: On MVP candidate list generation for AMVP
• JVET-M0247: encoder optimization of affine AMVR
• JVET-M0471: Long deblocking filters
• JVET-M0908: CIIP deblocking
• JVET-M0303: implicit MTS
• JVET-M0427: Picture reconstruction with mapping
• JVET-M0119: remove scaling of ts coefficients
• JVET-M0253: Hash-based motion search
• JVET-M0147: DMVR (Decoder-side Motion Vector Refinement)
• JVET-M0102: Intra Sub-Partitions (ISP)
• JVET-M0126: HMVP merge pruing
• JVET-M0483: IBC
• JVET-M0297: skipping high frequency coefficients in wide/high blocks
• JVET-M0140 Sub-block Transform (SBT) for inter blocks
• JVET-M0854: MMVD precision for UHD (encoder only)
• JVET-M0055: VTM transcoding capabilities/DebugCTU
• removal of SPSNext / SPS alignment with draft text
• CABAC states init retraining
• configuration file for class F
• various bug fixes and cleanups
• software manual updates

Removed JVET-Lxxx macros

Minor fixes (CU results reuse and block statistics generation)

Includes following items:

• L0231: Horizontal wrap-around motion compensation for inter prediction
• L0696: Proposed starting point for interoperability point syntax
• L0449: Add POC signaling for IDR pictures
• L0428: Delta QP and Chroma QP Offset for Separate Tree
• SPS HLS cleanups
• removal of unused code
• cmake environment updates
• bug fix for BIO
• bug fix for large affine motion vectors
• bug fix for constrained intra prediction
• update for tracing block statistics
• fix for incorrect scaling for triangular partitions
• MV resolution cleanup
• Various other fixes

Includes following items:

• L0082 10 b coeffs (instead of 11) – this seems clearly the logical thing to do, no loss
• L0147 Adopt 2.6.2, CE2: Subsampled Laplacian calculation
• L0083 Adopt (text is in the contribution), JVET-L0083, Reduction of bits for ALF coefficient fractional part
• L0392 Decision (minor BF): Adopted
• L0664 Remove the alf_luma_type_flag and the conditioning on it that results in signalling of 5x5 as a special case for luma
• L0283 CE3: Multiple reference line intra prediction, version 1.1.4 (with line restriction from CTU above).
• L0628 CE 3.1.4.2 A combination of tests 3.1.2 and 3.1.4 for intra reference sample interpolation filter
• L0191 CE3: Cross-component linear model simplification (Test 5.1)
• L0136/L0085 L0136 (5.2.7) / JVET-L0085 (5.8.1) CCLM with line buffer restriction
• L0338/L0340 L0338 method 5.4.1/JVET-L0340 method 5.6.1 Multi-directional LM
• L0053/L0272 Adopt JVET-L0053 first aspect / JVET-L0272 (CE3-related: Chroma DM modification)
• L0279 CE3-related: Unification of angular intra prediction for square and non-square blocks
• L0165 CE3-6.2.1: Extended MPM list
• L0059 CE6-related: Simplification on MTS kernel derivation
• L0111 CE6-related: Transform Skip Condition on Transform Block size
• L0285 Adopt JVET-L0285 (8-bit transform matrices)
• L0118 CE6-1.7b: Currently the switching DST-7/DCT-8 is different for inter and intra. Results indicate that the unification has minor impact on performance
• L0274 version 7.1.3b Transform coefficient coding with reduced number of regular-coded bins
• L0414 Other from the proposal, which makes the QP offset dependent on transfer function, the values shall be signalled in the SPS. Default is not applying (enabling flag=0). If the flag is 1, another syntax element follow indicating the number of intervals (2 bits for 2,3,4,5), and then the luma threshold values and QP offsets between the intervals.
• L0410 CE11-related: On deblocking tC table Meeting notes (L0074) Apply the same logic to VVC (both ATMVP and affine) sub-blocks (on 8x8 grid) as to PU in HEVC deblocking. This means check the deblocking motion conditions for ATMVP and affine motion sub-block boundaries as if they were PUs in HEVC.
• L0217 Adopt JVET-L0217 (as per v4), Non-CE1: Relation Between QT/BT/TT Split Constraint Syntax Elements
• L0678 QT/BT/TT Split Constraint Syntax Elements Signaling Method
• L0081 CE1.2.1: Constraint for binary and ternary partitions
• L0361 JVET-L0361 (version with 22 context models) contexts for split
• L0553 Adopt second fix to semantics of init_qp_minus26 where +25 is changed to +37
• L0293 Adopt CPR with restriction to using current CTU as reference area under condition, non-CTC
• L0047 Adopt method 1 as the more consistent and “clean” design (roughly neutral on coding efficiency 0.01%
• L0198, L0468, L0104 "use fixed subblock size 8x8 for ATMVP (L0198, L0468, L0104, possibly some others). check the first spatial neighbouring motion vector and use this as the reference motion vector for the collocated position for motion vector derivation "
• L0106, L0158 Reset the FIFO table in each CTU row for HMVP
• L0194 use one context for the first bin of the full-block merge index and bypass coding of other bins . for the full-block merge index only at this time, approximately no coding efficiency impact
• L0646 Adopt L0646 (0.66% coding efficiency; weighted prediction should also be put in the draft, but this and weighted prediction would be mutually exclusive at the picture level, when used with OBMC the weights of the neigbours would apply for the neighbour predictors, which is how the BMS software already does it, no consideration in deblocking filter
• L0104 Prohibit 4x4 bi-prediction for inter CU
• L0257 Align the software with the draft text regarding ATMVP motion vector clipping
• L0377 Rounding motion vectors toward zero rather than toward minus infinity for AMVR
• L0093/L0282 align VTM with draft text regarding the pruning of regular merge list
• L0265 set the chroma subblock size to 4x4 instead of 2x2 for affine motion compensation by averaging the MVs of the 4x4 luma subblocks
• L0271 Adopt 4.1.6.a (CE4.1.6: Simplification of affine AMVP candidate list construction)
• L0045 Adopt 4.1.11.a on line buffer reduction for affine mode (pending consideration of non-CE contributions, text in JVET-L0045 to be checked).
• L0632/L0142 Adopt the variation of 4.2.6.d as modified in L0632, pending text adapted from modifying model inheritance of L0368 and cross-check confirmation
• L0369/L0055 Adopt 4.2.8 moving ATMVP into the affine merge list (assuming ATMVP operates on a subblock basis, restrict ATMVP mode to CUs of which both the width and height are larger than or equal to 8 (L0055)
• L0090 4.4.12.a (0.38% in RA), merge list size 6 (text in L0090)
• L0266 Adopt history method with merge list size 6, history applied also to AMVP (0.58% gain in RA, text in L0266).
• L0054 Adopt UMVE variant b (1.29% in RA); this needs a better name – e.g., merge with MVD (MMVD)
• L0694 CE4-related: Combination of affine mode clean up and line buffer reduction
• L0260 Encoder optimization for affine motion estimation
• L0100 Adopt CE10.1.1.c (described in JVET-L0100) combined intra/inter with restriction to w×h >= 64 luma samples (0.5% in RA).
• L0124/L0208 CE10.3.1.b, Adopt (0.57% in RA, 1.23% in LB), with the L0208 bug fix, flag after combined intra/inter
• L0256 CE9-related: Complexity reduction and bit-width control for bi-directional optical flow (BIO)
• L0552 CABAC initial state retraining

Includes following items:

• L0082 10 b coeffs (instead of 11) – this seems clearly the logical thing to do, no loss
• L0147 Adopt 2.6.2, CE2: Subsampled Laplacian calculation
• L0083 Adopt (text is in the contribution), JVET-L0083, Reduction of bits for ALF coefficient fractional part
• L0392 Decision (minor BF): Adopted
• L0664 Remove the alf_luma_type_flag and the conditioning on it that results in signalling of 5x5 as a special case for luma
• L0283 CE3: Multiple reference line intra prediction, version 1.1.4 (with line restriction from CTU above).
• L0628 CE 3.1.4.2 A combination of tests 3.1.2 and 3.1.4 for intra reference sample interpolation filter
• L0191 CE3: Cross-component linear model simplification (Test 5.1)
• L0136/L0085 L0136 (5.2.7) / JVET-L0085 (5.8.1) CCLM with line buffer restriction
• L0338/L0340 L0338 method 5.4.1/JVET-L0340 method 5.6.1 Multi-directional LM
• L0053/L0272 Adopt JVET-L0053 first aspect / JVET-L0272 (CE3-related: Chroma DM modification)
• L0279 CE3-related: Unification of angular intra prediction for square and non-square blocks
• L0165 CE3-6.2.1: Extended MPM list
• L0059 CE6-related: Simplification on MTS kernel derivation
• L0111 CE6-related: Transform Skip Condition on Transform Block size
• L0285 Adopt JVET-L0285 (8-bit transform matrices)
• L0118 CE6-1.7b: Currently the switching DST-7/DCT-8 is different for inter and intra. Results indicate that the unification has minor impact on performance
• L0274 version 7.1.3b Transform coefficient coding with reduced number of regular-coded bins
• L0414 Other from the proposal, which makes the QP offset dependent on transfer function, the values shall be signalled in the SPS. Default is not applying (enabling flag=0). If the flag is 1, another syntax element follow indicating the number of intervals (2 bits for 2,3,4,5), and then the luma threshold values and QP offsets between the intervals.
• L0410 CE11-related: On deblocking tC table Meeting notes (L0074) Apply the same logic to VVC (both ATMVP and affine) sub-blocks (on 8x8 grid) as to PU in HEVC deblocking. This means check the deblocking motion conditions for ATMVP and affine motion sub-block boundaries as if they were PUs in HEVC.
• L0217 Adopt JVET-L0217 (as per v4), Non-CE1: Relation Between QT/BT/TT Split Constraint Syntax Elements
• L0678 QT/BT/TT Split Constraint Syntax Elements Signaling Method
• L0081 CE1.2.1: Constraint for binary and ternary partitions
• L0361 JVET-L0361 (version with 22 context models) contexts for split
• L0553 Adopt second fix to semantics of init_qp_minus26 where +25 is changed to +37
• L0293 Adopt CPR with restriction to using current CTU as reference area under condition, non-CTC
• L0047 Adopt method 1 as the more consistent and “clean” design (roughly neutral on coding efficiency 0.01%
• L0198, L0468, L0104 "use fixed subblock size 8x8 for ATMVP (L0198, L0468, L0104, possibly some others). check the first spatial neighbouring motion vector and use this as the reference motion vector for the collocated position for motion vector derivation "
• L0106, L0158 Reset the FIFO table in each CTU row for HMVP
• L0194 use one context for the first bin of the full-block merge index and bypass coding of other bins . for the full-block merge index only at this time, approximately no coding efficiency impact
• L0646 Adopt L0646 (0.66% coding efficiency; weighted prediction should also be put in the draft, but this and weighted prediction would be mutually exclusive at the picture level, when used with OBMC the weights of the neigbours would apply for the neighbour predictors, which is how the BMS software already does it, no consideration in deblocking filter
• L0104 Prohibit 4x4 bi-prediction for inter CU
• L0257 Align the software with the draft text regarding ATMVP motion vector clipping
• L0377 Rounding motion vectors toward zero rather than toward minus infinity for AMVR
• L0093/L0282 align VTM with draft text regarding the pruning of regular merge list
• L0265 set the chroma subblock size to 4x4 instead of 2x2 for affine motion compensation by averaging the MVs of the 4x4 luma subblocks
• L0271 Adopt 4.1.6.a (CE4.1.6: Simplification of affine AMVP candidate list construction)
• L0045 Adopt 4.1.11.a on line buffer reduction for affine mode (pending consideration of non-CE contributions, text in JVET-L0045 to be checked).
• L0632/L0142 Adopt the variation of 4.2.6.d as modified in L0632, pending text adapted from modifying model inheritance of L0368 and cross-check confirmation
• L0369/L0055 Adopt 4.2.8 moving ATMVP into the affine merge list (assuming ATMVP operates on a subblock basis, restrict ATMVP mode to CUs of which both the width and height are larger than or equal to 8 (L0055)
• L0090 4.4.12.a (0.38% in RA), merge list size 6 (text in L0090)
• L0266 Adopt history method with merge list size 6, history applied also to AMVP (0.58% gain in RA, text in L0266).
• L0054 Adopt UMVE variant b (1.29% in RA); this needs a better name – e.g., merge with MVD (MMVD)
• L0694 CE4-related: Combination of affine mode clean up and line buffer reduction
• L0260 Encoder optimization for affine motion estimation
• L0100 Adopt CE10.1.1.c (described in JVET-L0100) combined intra/inter with restriction to w×h >= 64 luma samples (0.5% in RA).
• L0124/L0208 CE10.3.1.b, Adopt (0.57% in RA, 1.23% in LB), with the L0208 bug fix, flag after combined intra/inter
• L0256 CE9-related: Complexity reduction and bit-width control for bi-directional optical flow (BIO)
• L0552 CABAC initial state retraining

Bug fixes:

• uninitialized memory access in intra prediction (bug #77)
• uninitialized memory access in affine ME (bug #76)

Added features for version 2.0:

• K0054: high-precision PSNR reporting
• K0063: PDPC
• K0072: trellis coded quantization
• K0122: DC prediction
• K0154: high-precision distortion
• K0184: Affine MC
• K0190: CCLM
• K0220: Encoder speedup
• K0230: Dual coding tree
• K0251: extended QP range
• K0261: SW cleanup
• K0346: ATMVP
• K0351: TT restriction
• K0352: Encoder optimization of merge
• K0357: AMVR
• K0371: ALF
• K0312: additional decoder stats
• K0238: SAO greedy merge encoder option
• K0500: wide angular intra prediction
• K0554: boundary handling
• K0556: maximum TT size is 64
• K1000: simplified EMT
• 67 intra modes with 3 MPMs
• Various deblocking fixes
• -ipp options now adds a / in path if needed
• Increase chroma QP with dual coding trees are used
• Remove type aliases such as Int, Void, etc.
• Updated license text (include year 2018)

Fixes since rc1:

• Separate tree fix
• Remove unused code (VTM)
• Update high-precision PSNR reporting to also apply to 360 case
• Fix compilation issue when tracing is enabled
• Fix chroma lambda when Cb to Cr prediction is off