1. JCTVC-I0343: Simplified absolute-3 coding method
Seung-Hwan Kim, Louis Kerofsky,
Andrew Segall 1 1

2. Absolute-3 coding in HM6.0 Absolute-3 coding
Combination of adaptive truncated Golomb-Rice (G-R) code and 0-th order Exponential Golomb (EG0) code
Adaptive G-R code with rice parameter (cRiceParam) 0,1,2,3,and 4
cRiceParam is updated as shown in the below table
G-R code range [7,14,26,46,78]
G-R code table size [9,16,28,48,80] bytes
EG0 code is employed when input value is larger than G-R code range
Symbol
Rice Parameter 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 2 2

3. Simplified absolute-3 coding structure
Invention
Simplified absolute-3 coding
1) If cRiceParam >3, G-R coding is skipped and EG0 is replaced by EG4
2) 44.2% memory savings for G-R code
HM6.0
Proposed Method

4. Implemented the proposed method into HM 6.0
Results
Implemented the proposed method into HM 6.0
Test 1: common test condition (QP=22,27,32,37)
Test 2: low QP test condition (QP=1,5,9,13)
Main
HE10 Y U V
All Intra
0.0% RA
0.1% LD
-0.1%
Main
HE10 Y U V
All Intra
-0.03%
-0.02%
-0.001%
0.04% RA
0.02%
0.03%
0.01% LD
0.00%
Class F: %(AI_Main), -0.88(AI_HE10)
-0.88% (RA_Main), -0.48(RA_HE10)
-0.33%(LA_Main), (LA_HE10) 4

5. Reduce the memory requirement for G-R code
Conclusion
Reduce the memory requirement for G-R code
Eliminating rice parameter 4 Table
Reduced by 44.2%
Simplified coding structure
Employing only EG4 when cRiceParam ==4
Coding performance
No changes in common test condition and negligible changes in low QP
Significant coding gain (-1.56% for AI_Main) for Class F 5 5