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Joint Collaborative Team on Video Coding (JCT-VC)
of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11 Document: JCTVC-L0007
12th Meeting: Geneva, CH, 14 – 23 January 2013 Title:

JCT-VC AHG report: Support for range extensions (AHG 7)


Status: Input Document to JCT-VC
Purpose: Ad-hoc group report
Author(s):
David Flynn
dflynn@rim.com
Pierre Andrivon pierre.andrivon@technicolor.com
Eduard Francois edouard.francois@crf.canon.fr
Marta Mrak marta.mrak@bbc.co.uk
Ken McCann ken@zetacast.com
Chris Rosewarne chris.rosewarne@cisra.canon.com.au
Karl Sharman karl.sharman@eu.sony.com
Kazuo Sugimoto sugimoto.kazuo@ak.mitsubishielectric.co.jp
Pankaj Topiwala pankajtva@gmail.com

Source: AHG 7

______________________________

Abstract

This report summarizes the activities of Ad Hoc Group 7 on support for range extensions between the 11th and 12th JCT-VC meetings.

Mandates

The ad hoc group was mandated to:

Matters arising

A number of test sequences were made available according to the BoG recommendations of the previous meeting [1] and uploaded along with documentation of the conversion process to the uni-hannover ftp site:

ftp://hevc@ftp.tnt.uni-hannover.de/testsequences/FrExt-candidate-sequences/

We would like to thank the EBU for their kind contribution of a number of 4:2:2 and 4:4:4 test sequences.

The software development has been performed by creating an HM-range-extensions branch based upon the previous HM-8.0-ahg7-dev branch. To simplify development, the HM releases have been merged into the new branch as appropriate to keep the two systems from diverging.

The software revsion r3055 (known as HM-9.0.1-rext-1.0) incorporates the recommendations from the previous meeting. Performance was evaluated against JM 18.4 anchors (See Tables 1 and 2) based upon the preferred configuration decided at the previous meeting [2].

A working draft text [3] has been produced and reintegrated into K1003_v13. One part is still pending integration. There are a number of parsing issues that the editors have identified which should be addressed at this meeting. Some of these may be addressed in either version 1 or version 2.

Table 1: Performance of HM-9.0.1-rext-1.0 vs JM18.4 with 4:4:4 input
Main-tier
High-tier
Y Cb Cr Y Cb Cr
All Intra -23.3 % -20.4% -25.2% -23.5% -22.8% -28.1%
Random Access -46.1 % -51.6% -51.5% -44.3% -49.0% -56.5%
Low Delay B -48.0 % -56.9% -61.2% -44.4% -50.3% -56.1%

Table 2: Performance of HM-9.0.1-rext-1.0 vs JM18.4 with 4:2:2 input
Main-tier
High-tier
Y Cb Cr Y Cb Cr
All Intra -21.0% -15.7% -17.2% -17.8% -14.9% -18.7%
Random Access -34.9% -31.5% -30.2% -31.9% -33.5% -35.8%
Low Delay B -38.9% -30.9% -32.2% -31.6% -30.1% -34.8%

Contributions

A number of documents have been contributed, relating to a number of areas:

Recommendations

It is recommended to:

References

[1]   D. Flynn, “Bog report on range extensions.” JCTVC-K0365, Oct. 2012.

[2]   D. Flynn, “Common test conditions and software reference configurations for hevc range extensions.” JCTVC-K1006, Oct. 2012.

[3]   D. Flynn and G. J. Sullivan, “Hevc range extensions draft 1.” JCTVC-K1005, Oct. 2012.

[4]   C. Rosewarne, V. Kolesnikov, and M. Maeda, “Ce1: Test 2 - non 32x32 point transforms in chroma for range extensions.” JCTVC-L0146, Jan. 2013.

[5]   C. Rosewarne, V. Kolesnikov, and M. Maeda, “Ce1: Test 3 - square transforms for range extensions.” JCTVC-L0148, Jan. 2013.

[6]   K. Sharman, N. Saunders, and J. Gamei, “Ce1: Test 1 - rectangular transform units for 4:2:2 (and ahg7 benchmarks).” JCTVC-L0182, Jan. 2013.

[7]   J. Sole, R. Joshi, and M. Karczewicz, “Ce1: Test 3 - square transform blocks for 4:2:2.” JCTVC-L0333, Jan. 2013.

[8]   C. Rosewarne, V. Kolesnikov, and M. Maeda, “Cross-check of ce1: Test 1 - rectangular transforms for 4:2:2 (l0182) by sony.” JCTVC-L0147, Jan. 2013.

[9]   H. Nakamura, “Ce1: Cross-verification of ce1 test 3 square transforms for 4:2:2 chroma format coding.” JCTVC-L0159, Jan. 2013.

[10]   X. Zheng and Y. Lin, “Cross-verification results of ce1: Test 2 - non 32x32 point transforms in chroma for range extensions (l0146).” JCTVC-L0320, Jan. 2013.

[11]   J. Sole, “Crosscheck of ce1 test1: rectangular transforms for 4:2:2 (jctvc-l0182).” JCTVC-L0331, Jan. 2013.

[12]   A. Gabriellini and M. Mrak, “Ce1: Cross-check of l0333 test 3 - square transform blocks for 4:2:2.” JCTVC-L0350, Jan. 2013.

[13]   C. Rosewarne, “Cross-check of ce1: Test 3 - square transform blocks for 4:2:2 (l0333) by qualcomm.” JCTVC-L0406, Jan. 2013.

[14]   C. Rosewarne, V. Kolesnikov, and M. Maeda, “Non-ce1: Test 3 - transform skip for chroma in 4:2:2 range extension.” JCTVC-L0149, Jan. 2013.

[15]   C. Rosewarne, V. Kolesnikov, and M. Maeda, “Non-ce1: Test 3 - square transform deblocking for 4:2:2.” JCTVC-L0150, Jan. 2013.

[16]   V. Kolesnikov, C. Rosewarne, and M. Maeda, “Non-ce1: Test 3 - 32x32 transform in chroma for 4:2:2.” JCTVC-L0151, Jan. 2013.

[17]   J. Sole, R. Joshi, M. Karczewicz, A. Gabriellini, and M. Mrak, “Non-ce1: Square transform blocks for 4:2:2.” JCTVC-L0351, Jan. 2013.

[18]   C. Rosewarne and M. Maeda, “Cross-check of non-ce1: Square transform blocks for 4:2:2 (l0351) by qualcomm and the bbc.” JCTVC-L0407, Jan. 2013.

[19]   J. Sole, “Crosscheck of non-ce1 test 3 with transform skip for chroma in 4:2:2 range extension (jctvc-l0149).” JCTVC-L0409, Jan. 2013.

[20]   J. Sole, “Crosscheck of non-ce1 test 3 with 32x32 transform in chroma for 4:2:2 range extension (jctvc-l0151).” JCTVC-L0417, Jan. 2013.

[21]   L. Kerofsky and S. Riabtsev, “Dynamic range analysis of hevc/h.265 inverse transform operations.” JCTVC-L0332, Jan. 2013.

[22]   J. Min, T. Lee, and C. Kim, “Ahg7: Reference sample filtering in intra prediction for chroma extended format.” JCTVC-L0112, Jan. 2013.

[23]   S. Matsuo, S. Takamura, H. Fujii, and A. Shimizu, “Ahg7: Modification of intra angular prediction blending.” JCTVC-L0128, Jan. 2013.

[24]   S. Matsuo, S. Takamura, H. Fujii, and A. Shimizu, “Ahg7: Modification filter for intra angular prediction.” JCTVC-L0129, Jan. 2013.

[25]   M. Zhou, “Ahg7: Sample-based angular intra prediction for hevc range extension.” JCTVC-L0176, Jan. 2013.

[26]   K. Kawamura, T. Yoshino, and S. Naito, “Ahg7: Inter-plane intra coding of residual signals for range extensions.” JCTVC-L0370, Jan. 2013.

[27]   J.Kim, “Ahg7: The performance of extended intra chroma prediction for non 4:2:0 format.” JCTVC-L0240, Jan. 2013.

[28]   S. Matsuo, M. Matsumura, S. Takamura, H. Fujii, and A. Shimizu, “Cross-check report of reference sample filtering in intra prediction for chroma extended format (jctvc-l0112).” JCTVC-L0391, Jan. 2013.

[29]   K. Kawamura and S. Naito, “Cross-check of modified intra angular blending (jctvc-l0128).” JCTVC-L0374, Jan. 2013.

[30]   K.Tokumitsu and K.Chono, “Ahg7: Cross-verification report on jctvc-l0176 entitled “sample-based angular intra prediction for hevc range extension”.” JCTVC-L0275, Jan. 2013.

[31]   W. Gao, J. Ye, and H. Yu, “Ahg7: Cross-check results of sample-based angular intra prediction for hevc range extension (jctvc-l0176).” JCTVC-L0399, Jan. 2013.

[32]   K. Kawamura, T. Yoshino, and S. Naito, “Ahg7: In-loop color-space transformation of residual signals for range extensions.” JCTVC-L0371, Jan. 2013.

[33]   S. Matsuo, M. Matsumura, S. Takamura, H. Fujii, and A. Shimizu, “Cross-check report of in-loop color-space transformation of residual signals (jctvc-l0371).” JCTVC-L0124, Jan. 2013.

[34]   A. Gabriellini and M. Mrak, “Ahg7: Coding 4:2:2 chroma format with 4:2:0 and 4:4:4 format codecs.” JCTVC-L0162, Jan. 2013.

[35]   P. Topiwala, W. Dai, and M. Krishnan, “Ahg7: 4:4:4 lite: A high-level syntax approach to a consumer 4:4:4 codec.” JCTVC-L0175, Jan. 2013.

[36]   M. Budagavi and M. Zhou, “Mixed chroma format coding.” JCTVC-L0250, Jan. 2013.

[37]   M. Matsumura, S. Takamura, H. Fujii, and A. Shimizu, “Ahg7: Lcu-based non-local means filter for chroma components in hevc range extensions.” JCTVC-L0127, Jan. 2013.

[38]   K. Kawamura and S. Naito, “Cross-check of non-local means filter for chroma components (jctvc-l0127).” JCTVC-L0373, Jan. 2013.

[39]   R. Weerakkody, A. Gabriellini, M. Naccari, and M. Mrak, “Ahg7: Analysis on high internal bit depth processing.” JCTVC-L0189, Jan. 2013.