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13th Meeting: Marrakech, January 2019 2019-01-11 16:34
CE8.1.3: Extended CPR reference with 1 buffer line
Authors: Luong Pham Van Qualcomm Vadim Seregin Qualcomm W.-J. Chien Qualcomm T. Hsieh Qualcomm Marta Karczewicz Qualcomm
Abstract
This contribution reports the simulation results of the Core Explore test CE8.1.3. In this test, the line buffer (one line above) and one column to left of the current CTU is added to the CPR reference. With the proposed restricted search area, the luma BD-rate changes for [CTC, Class F, class SCC 1080p] are:
Meeting Notes
JVET-M0474 CE8.1.3: Extended CPR reference with 1 buffer line [L. Pham Van, V. Seregin, W.-J. Chien, T. Hsieh, M. Karczewicz (Qualcomm)]

The current CPR reference area is limited to the reconstructed samples of the current CTU. However, neighbour samples around a CTU are required for intra prediction, that samples can be available for CPR reference as well. In the CE, the following tests are performed:

The search range is the current CTU and 1 line above, and 1 left column to the current CTU.

References:
JVET-K0076
Cited:
JVET-M0011 JVET-M0028 X JVET-M0543 X
PATENTS:
JP7603732B2 0.34 2024-12-20 USRE47867E1 0.32 2020-02-18 US11448613B2 0.30 2022-09-20 JP7194243B2 0.28 2022-12-21 US11405051B2 0.26 2022-08-02 US12265477B2 0.24 2025-04-01 US11227086B2 0.22 2022-01-18 US11675943B2 0.20 2023-06-13
ARCHIVE v3 :
CE8.1.3_CPRon_PLToff-tester.xlsm CE8.1.3_CPRon_PLTon-tester.xlsm JVET-M0474_Luong.pptx JVET-M0474_Test1_tester.xlsm JVET-M0474_Test2_CPRon_PLToff_tester.xlsm JVET-M0474_Test2_CPRon_PLTon_tester.xlsm JVET-M0474_Test3_CPRon_PLToff_tester.xlsm JVET-M0474_Test3_CPRon_PLTon_tester.xlsm JVET-M0474_Test4_CPRon_PLToff_tester.xlsm JVET-M0474_Test4_CPRon_PLTon_tester.xlsm JVET-M0474_v3.docx
Decisions
The search range is the current CTU and 1 line above, and 1 left column to the current CTU.
Citation