Organisation internationale de normalisation

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All Intra	Random Access
Low delay B
	G/Y	B/U	R/V	G/Y	B/U	R/V	G/Y	B/U	R/V
RGB, text & graphics with motion, 1080p	−0.2%	−0.3%	−0.3%	−0.1%	−0.1%	−0.1%	0.0%	0.0%	0.0%
RGB, text & graphics with motion,720p	0.3%	0.3%	0.3%	0.3%	0.2%	0.2%	0.1%	0.1%	0.2%
RGB, mixed content, 1440p	0.0%	0.0%	−0.1%	−0.1%	−0.2%	−0.2%	−0.1%	−0.1%	−0.1%
RGB, mixed content, 1080p	−0.2%	−0.2%	−0.2%	−0.1%	−0.3%	−0.3%	−0.2%	0.3%	0.0%
RGB, Animation, 720p	0.0%	0.0%	0.0%	0.1%	0.1%	0.0%	0.0%	0.2%	0.1%
RGB, camera captured, 1080p	0.0%	0.0%	0.0%	0.1%	0.0%	0.0%	0.0%	0.0%	0.0%
YUV, text & graphics with motion, 1080p	1.1%	1.1%	1.1%	0.3%	0.0%	0.1%	0.0%	−0.1%	−0.1%
YUV, text & graphics with motion,720p	0.6%	0.6%	0.6%	0.2%	0.1%	0.1%	0.0%	0.3%	0.1%
YUV, mixed content, 1440p	0.1%	0.0%	−0.1%	0.1%	−0.5%	−0.2%	−0.1%	−0.6%	−0.2%
YUV, mixed content, 1080p	0.2%	−0.2%	0.0%	0.0%	−0.6%	−0.4%	0.4%	0.2%	0.2%
YUV, Animation, 720p	0.1%	0.0%	0.0%	0.2%	0.0%	0.1%	0.1%	−0.1%	0.0%
YUV, camera captured, 1080p	0.0%	0.0%	0.0%	0.1%	0.2%	0.0%	0.1%	0.0%	0.2%
Enc Time[%]	108%			103%			103%
Dec Time[%]	126%			189%			194%

Performance of Test 2 against SCM2.0 in 4-CTU configuration (JCTVC-S0161)

	All Intra			Random Access			Low delay B
	G/Y	B/U	R/V	G/Y	B/U	R/V	G/Y	B/U	R/V
RGB, text & graphics with motion, 1080p	−0.5%	−0.6%	−0.6%	−0.2%	−0.3%	−0.3%	0.0%	−0.1%	0.0%
RGB, text & graphics with motion,720p	0.1%	0.1%	0.1%	0.0%	0.0%	0.0%	0.2%	0.1%	0.1%
RGB, mixed content, 1440p	−0.1%	−0.1%	−0.1%	−0.2%	−0.2%	−0.3%	−0.2%	−0.2%	−0.2%
RGB, mixed content, 1080p	0.0%	0.0%	0.0%	−0.2%	−0.2%	−0.2%	−0.3%	−0.6%	−0.3%
RGB, Animation, 720p	0.0%	0.1%	0.0%	0.0%	−0.1%	0.1%	0.1%	0.1%	0.0%
RGB, camera captured, 1080p	0.0%	0.0%	0.0%	0.0%	0.1%	0.0%	0.1%	0.1%	0.1%
YUV, text & graphics with motion, 1080p	0.5%	0.5%	0.6%	0.0%	−0.1%	0.0%	−0.1%	−0.1%	−0.1%
YUV, text & graphics with motion,720p	0.4%	0.3%	0.3%	0.1%	0.0%	−0.1%	0.2%	−0.2%	0.3%
YUV, mixed content, 1440p	0.0%	−0.3%	−0.3%	−0.1%	−0.8%	−0.6%	−0.4%	−0.8%	−0.6%
YUV, mixed content, 1080p	0.2%	0.0%	0.0%	0.1%	−0.5%	−0.6%	−0.1%	−0.4%	−0.2%
YUV, Animation, 720p	0.1%	0.0%	0.0%	0.0%	0.2%	0.0%	0.0%	0.3%	0.3%
YUV, camera captured, 1080p	0.0%	0.0%	0.0%	0.1%	0.0%	0.2%	0.0%	0.1%	0.2%
Enc Time[%]	107%			105%			104%
Dec Time[%]	129%			189%			194%

Performance of Test 3 against SCM2.0 in CTC configuration (JCTVC-S0161)

	All Intra			Random Access			Low delay B
	G/Y	B/U	R/V	G/Y	B/U	R/V	G/Y	B/U	R/V
RGB, text & graphics with motion, 1080p	−1.0%	−1.3%	−1.2%	−0.7%	−0.8%	−0.7%	−0.5%	−0.5%	−0.5%
RGB, text & graphics with motion,720p	−0.5%	−0.4%	−0.4%	−0.4%	−0.4%	−0.3%	−0.3%	−0.4%	−0.2%
RGB, mixed content, 1440p	0.0%	−0.1%	−0.1%	0.0%	−0.1%	−0.1%	−0.3%	−0.4%	−0.2%
RGB, mixed content, 1080p	−0.1%	−0.2%	−0.1%	−0.2%	−0.2%	−0.2%	−0.4%	−0.3%	0.2%
RGB, Animation, 720p	0.0%	0.1%	0.0%	0.1%	0.0%	0.0%	0.1%	0.1%	0.1%
RGB, camera captured, 1080p	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
YUV, text & graphics with motion, 1080p	0.6%	0.3%	0.4%	−0.4%	−0.6%	−0.5%	−0.5%	−0.6%	−0.5%
YUV, text & graphics with motion,720p	0.4%	0.4%	0.3%	0.0%	0.1%	0.0%	−0.1%	0.1%	0.2%
YUV, mixed content, 1440p	0.2%	0.0%	0.0%	0.1%	−0.4%	−0.3%	−0.3%	−0.7%	−0.2%
YUV, mixed content, 1080p	0.2%	0.1%	0.1%	0.1%	−0.3%	−0.3%	0.0%	−0.2%	−0.1%
YUV, Animation, 720p	0.1%	0.0%	0.1%	0.1%	0.1%	0.0%	0.2%	0.0%	0.4%
YUV, camera captured, 1080p	0.0%	0.0%	0.0%	0.1%	0.1%	0.1%	0.1%	0.0%	0.1%
Enc Time[%]	106%			103%			103%
Dec Time[%]	126%			188%			193%

Performance of Test 3 against SCM2.0 in 4-CTU configuration (JCTVC-S0161)

	All Intra			Random Access			Low delay B
	G/Y	B/U	R/V	G/Y	B/U	R/V	G/Y	B/U	R/V
RGB, text & graphics with motion, 1080p	−1.9%	−2.3%	−2.2%	−1.2%	−1.5%	−1.3%	−0.7%	−0.8%	−0.8%
RGB, text & graphics with motion,720p	−1.2%	−1.6%	−1.4%	−1.5%	−1.7%	−1.7%	−0.4%	−0.6%	−0.6%
RGB, mixed content, 1440p	−0.2%	−0.2%	−0.2%	−0.3%	−0.3%	−0.3%	−0.3%	−0.2%	−0.5%
RGB, mixed content, 1080p	−0.1%	−0.1%	−0.1%	−0.3%	−0.2%	−0.3%	−0.4%	−0.4%	−0.5%
RGB, Animation, 720p	0.0%	0.1%	0.0%	0.1%	0.0%	0.1%	0.1%	0.1%	0.1%
RGB, camera captured, 1080p	0.0%	0.0%	0.0%	0.0%	0.1%	0.0%	0.0%	0.1%	0.1%
YUV, text & graphics with motion, 1080p	−0.6%	−1.0%	−0.8%	−0.9%	−1.3%	−1.2%	−0.8%	−0.8%	−0.8%
YUV, text & graphics with motion,720p	0.1%	−0.2%	−0.3%	−0.3%	−0.6%	−0.9%	0.0%	−0.1%	0.1%
YUV, mixed content, 1440p	0.0%	−0.4%	−0.3%	−0.1%	−0.6%	−0.6%	−0.2%	−0.6%	−0.5%
YUV, mixed content, 1080p	0.1%	−0.1%	−0.1%	0.0%	−0.5%	−0.5%	−0.5%	−1.1%	−0.9%
YUV, Animation, 720p	0.1%	0.0%	0.0%	0.1%	0.1%	0.0%	0.1%	0.0%	0.2%
YUV, camera captured, 1080p	0.0%	0.0%	0.0%	0.0%	0.0%	0.2%	0.0%	0.0%	0.1%
Enc Time[%]	106%			105%			104%
Dec Time[%]	128%			189%			194%

For test 4, The additional mapping table was not implemented based on the common CE software. More clarification is needed for the evaluation of this proposal. Results were provided only on Oct. 16^th. (not available in input document S0192, and not conclusive according to proponent).

Performance of Test 5 against SCM2.0 in CTC configuration (JCTVC-S0161)

	All Intra			Random Access			Low delay B
	G/Y	B/U	R/V	G/Y	B/U	R/V	G/Y	B/U	R/V
RGB, text & graphics with motion, 1080p	−0.9%	−1.2%	−1.1%	−0.7%	−0.7%	−0.7%	−0.5%	−0.5%	−0.5%
RGB, text & graphics with motion,720p	−0.4%	−0.3%	−0.4%	−0.3%	−0.5%	−0.3%	−0.1%	−0.3%	−0.4%
RGB, mixed content, 1440p	0.0%	−0.1%	−0.1%	0.0%	0.0%	−0.1%	−0.2%	−0.2%	−0.1%
RGB, mixed content, 1080p	−0.1%	−0.1%	0.0%	0.0%	−0.2%	−0.2%	−0.2%	0.3%	0.5%
RGB, Animation, 720p	0.0%	0.0%	0.0%	0.1%	0.0%	0.1%	0.0%	0.1%	0.1%
RGB, camera captured, 1080p	0.0%	0.0%	0.0%	0.1%	0.0%	0.0%	0.1%	0.0%	0.1%
YUV, text & graphics with motion, 1080p	0.6%	0.5%	0.6%	−0.4%	−0.5%	−0.4%	−0.5%	−0.5%	−0.4%
YUV, text & graphics with motion,720p	0.6%	0.5%	0.4%	0.0%	0.1%	0.1%	−0.1%	−0.1%	0.0%
YUV, mixed content, 1440p	0.1%	0.0%	−0.1%	0.1%	−0.3%	−0.2%	−0.4%	−0.2%	−0.1%
YUV, mixed content, 1080p	0.2%	0.0%	0.2%	0.1%	−0.4%	0.0%	0.0%	−0.1%	−0.2%
YUV, Animation, 720p	0.1%	0.0%	0.0%	0.1%	0.0%	0.1%	0.2%	−0.1%	0.5%
YUV, camera captured, 1080p	0.0%	0.0%	0.0%	0.1%	0.2%	0.1%	0.1%	−0.1%	0.2%
Enc Time[%]	110%			104%			103%
Dec Time[%]	127%			188%			195%

Performance of Test 5 against SCM2.0 in 4-CTU configuration (JCTVC-S0161)

	All Intra			Random Access			Low delay B
	G/Y	B/U	R/V	G/Y	B/U	R/V	G/Y	B/U	R/V
RGB, text & graphics with motion, 1080p	−1.7%	−2.1%	−2.0%	−1.2%	−1.4%	−1.3%	−0.8%	−0.8%	−0.8%
RGB, text & graphics with motion,720p	−1.1%	−1.4%	−1.2%	−1.3%	−1.5%	−1.4%	−0.1%	−0.4%	−0.3%
RGB, mixed content, 1440p	−0.1%	−0.1%	−0.1%	−0.2%	−0.2%	−0.2%	−0.1%	−0.1%	−0.3%
RGB, mixed content, 1080p	−0.1%	0.0%	0.0%	−0.1%	0.0%	0.0%	−0.1%	−0.2%	−0.3%
RGB, Animation, 720p	0.0%	0.0%	0.0%	0.0%	−0.1%	0.0%	0.0%	0.1%	0.1%
RGB, camera captured, 1080p	0.0%	0.0%	0.0%	0.0%	0.1%	0.0%	0.1%	0.1%	0.1%
YUV, text & graphics with motion, 1080p	−0.6%	−0.7%	−0.7%	−0.9%	−1.1%	−1.0%	−0.8%	−0.8%	−0.8%
YUV, text & graphics with motion,720p	0.1%	−0.1%	0.0%	−0.2%	−0.4%	−0.6%	0.1%	0.0%	−0.1%
YUV, mixed content, 1440p	0.0%	−0.2%	−0.2%	−0.1%	−0.5%	−0.4%	−0.1%	−0.1%	−0.1%
YUV, mixed content, 1080p	0.1%	0.0%	0.0%	0.1%	0.0%	−0.1%	−0.3%	−0.4%	0.0%
YUV, Animation, 720p	0.1%	0.0%	0.1%	0.1%	0.1%	−0.1%	0.2%	−0.2%	0.1%
YUV, camera captured, 1080p	0.0%	0.0%	0.0%	0.0%	0.0%	0.2%	0.0%	0.1%	0.2%
Enc Time[%]	108%			105%			103%
Dec Time[%]	123%			189%			195%

Performance of Test 6.1 against CE10 common software in CTC configuration (JCTVC-S0165)

	All Intra			Random Access			Low delay B
	G/Y	B/U	R/V	G/Y	B/U	R/V	G/Y	B/U	R/V
RGB, text & graphics with motion, 1080p	−0.7%	−0.7%	−0.7%	−0.4%	−0.5%	−0.5%	−0.3%	−0.3%	−0.4%
RGB, text & graphics with motion,720p	−0.3%	−0.5%	−0.3%	−0.4%	−0.5%	−0.4%	0.1%	−0.1%	−0.3%
RGB, mixed content, 1440p	0.0%	−0.1%	−0.1%	−0.1%	−0.1%	−0.1%	0.1%	0.1%	0.0%
RGB, mixed content, 1080p	−0.2%	−0.2%	−0.2%	−0.1%	−0.2%	−0.1%	−0.1%	−0.1%	−0.4%
RGB, Animation, 720p	0.0%	0.0%	0.0%	0.0%	−0.1%	0.0%	0.1%	0.0%	0.0%
RGB, camera captured, 1080p	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
YUV, text & graphics with motion, 1080p	−0.5%	−0.5%	−0.5%	−0.3%	−0.4%	−0.3%	−0.3%	−0.3%	−0.3%
YUV, text & graphics with motion,720p	−0.2%	−0.3%	−0.2%	−0.4%	−0.5%	−0.5%	−0.2%	−0.1%	−0.4%
YUV, mixed content, 1440p	0.0%	0.0%	0.0%	−0.1%	−0.2%	0.0%	0.1%	0.0%	0.4%
YUV, mixed content, 1080p	−0.1%	−0.1%	−0.1%	−0.1%	−0.2%	−0.1%	0.0%	−0.2%	0.3%
YUV, Animation, 720p	0.0%	0.0%	0.0%	0.0%	0.0%	0.1%	0.0%	0.1%	0.2%
YUV, camera captured, 1080p	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
Enc Time[%]	100%			102%			101%
Dec Time[%]	99%			103%			98%

Performance of Test 6.1 against CE10 common software in 4-CTU configuration (JCTVC-S0165)

	All Intra			Random Access			Low delay B
	G/Y	B/U	R/V	G/Y	B/U	R/V	G/Y	B/U	R/V
RGB, text & graphics with motion, 1080p	−0.5%	−0.6%	−0.6%	−0.4%	−0.4%	−0.4%	−0.3%	−0.2%	−0.3%
RGB, text & graphics with motion,720p	−0.2%	−0.3%	−0.3%	−0.2%	−0.2%	−0.3%	−0.1%	−0.2%	−0.3%
RGB, mixed content, 1440p	0.0%	0.0%	0.0%	−0.1%	0.0%	−0.1%	−0.1%	−0.1%	0.0%
RGB, mixed content, 1080p	0.0%	0.0%	0.0%	0.0%	−0.1%	0.0%	−0.2%	0.0%	0.3%
RGB, Animation, 720p	0.0%	0.0%	0.0%	0.0%	0.0%	−0.1%	0.0%	0.0%	0.0%
RGB, camera captured, 1080p	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
YUV, text & graphics with motion, 1080p	−0.4%	−0.4%	−0.4%	−0.3%	−0.4%	−0.3%	−0.1%	−0.2%	−0.2%
YUV, text & graphics with motion,720p	−0.1%	−0.3%	−0.2%	−0.2%	−0.2%	−0.3%	0.1%	−0.1%	0.0%
YUV, mixed content, 1440p	0.0%	0.0%	0.0%	−0.1%	−0.2%	−0.3%	−0.1%	−0.4%	−0.3%
YUV, mixed content, 1080p	0.0%	0.0%	0.0%	−0.2%	−0.1%	−0.1%	0.0%	0.3%	−0.4%
YUV, Animation, 720p	0.0%	0.0%	0.0%	0.1%	−0.1%	0.0%	0.2%	0.2%	−0.2%
YUV, camera captured, 1080p	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
Enc Time[%]	−0.5%			−0.6%			−0.6%
Dec Time[%]	−0.2%			−0.3%			−0.3%

Test 6.2 (entropy coding for 1D matching) provided a different method for the coding of offsets based in 1D matching.

It is claimed to be implemented based on JCTVC-S0083 with 1D matching enabled.

It achieves average Luma BD-rate savings of 0.4%, 0.3%, and 0.1% for YUV, text & graphics with motion, 1080p sequences for the AI, RA, LB settings, respectively.

Test 6.3 (entropy coding the run length) is compared with the common software of this CE. It achieves average Luma BD-rate savings of 0.3%, 0.2%, and 0.2% for YUV, text & graphics with motion, 1080p sequences for the AI, RA, LB settings, respectively.
Performance of Test 7.1 against SCM2.0 in CTC configuration (JCTVC-S0174)

	All Intra			Random Access			Low delay B
	G/Y	B/U	R/V	G/Y	B/U	R/V	G/Y	B/U	R/V
RGB, text & graphics with motion, 1080p	−1.7%	−2.0%	−1.9%	−1.2%	−1.4%	−1.4%	−1.0%	−1.2%	−1.1%
RGB, text & graphics with motion,720p	−0.5%	−0.6%	−0.5%	−0.4%	−0.6%	−0.5%	−0.3%	−0.3%	−0.3%
RGB, mixed content, 1440p	−0.1%	−0.1%	−0.1%	−0.1%	−0.1%	−0.2%	−0.1%	−0.1%	−0.2%
RGB, mixed content, 1080p	−0.4%	−0.4%	−0.3%	−0.3%	−0.4%	−0.3%	−0.3%	0.1%	0.7%
RGB, Animation, 720p	0.0%	0.0%	0.0%	0.0%	0.1%	0.0%	0.1%	0.1%	0.2%
RGB, camera captured, 1080p	0.0%	0.0%	0.0%	0.1%	0.0%	0.0%	0.1%	0.0%	0.1%
YUV, text & graphics with motion, 1080p	−1.5%	−1.6%	−1.5%	−1.1%	−1.3%	−1.3%	−0.9%	−1.0%	−1.0%
YUV, text & graphics with motion,720p	−0.3%	−0.3%	−0.5%	−0.2%	−0.4%	−0.4%	−0.2%	−0.1%	−0.4%
YUV, mixed content, 1440p	−0.1%	−0.2%	−0.2%	−0.1%	−0.1%	−0.1%	0.0%	0.0%	0.5%
YUV, mixed content, 1080p	−0.2%	−0.3%	−0.3%	−0.2%	−0.2%	−0.2%	0.1%	0.1%	−0.3%
YUV, Animation, 720p	0.1%	0.1%	0.0%	0.1%	0.0%	0.1%	0.2%	−0.2%	0.2%
YUV, camera captured, 1080p	0.0%	0.0%	0.1%	0.1%	0.2%	0.1%	0.1%	0.0%	0.0%
Enc Time[%]	145%			113%			109%
Dec Time[%]	99%			103%			102%

Performance of Test 7.1 against SCM2.0 in 4-CTU configuration (JCTVC- S0174)

	All Intra			Random Access			Low delay B
	G/Y	B/U	R/V	G/Y	B/U	R/V	G/Y	B/U	R/V
RGB, text & graphics with motion, 1080p	−1.1%	−1.3%	−1.3%	−0.9%	−1.1%	−1.0%	−0.7%	−0.8%	−0.8%
RGB, text & graphics with motion,720p	−0.2%	−0.2%	−0.1%	−0.2%	−0.3%	−0.2%	0.0%	−0.1%	−0.1%
RGB, mixed content, 1440p	−0.1%	−0.2%	−0.1%	−0.1%	−0.1%	−0.2%	−0.1%	−0.1%	−0.2%
RGB, mixed content, 1080p	−0.1%	−0.1%	0.0%	0.1%	0.0%	−0.1%	0.1%	−0.2%	0.1%
RGB, Animation, 720p	0.0%	0.0%	0.0%	0.1%	0.0%	0.1%	0.1%	0.2%	0.0%
RGB, camera captured, 1080p	0.0%	0.0%	0.1%	0.1%	0.1%	0.1%	0.1%	0.0%	0.1%
YUV, text & graphics with motion, 1080p	−1.0%	−1.0%	−0.9%	−0.9%	−1.0%	−1.0%	−0.8%	−0.9%	−0.9%
YUV, text & graphics with motion,720p	−0.1%	−0.2%	0.0%	−0.1%	0.0%	−0.2%	0.2%	0.1%	0.2%
YUV, mixed content, 1440p	−0.1%	−0.2%	−0.2%	−0.1%	0.0%	−0.1%	0.0%	0.2%	0.3%
YUV, mixed content, 1080p	0.0%	−0.1%	0.0%	0.1%	0.0%	0.1%	−0.2%	−0.5%	0.1%
YUV, Animation, 720p	0.1%	0.0%	0.1%	0.1%	0.2%	0.1%	0.1%	−0.1%	0.2%
YUV, camera captured, 1080p	0.0%	0.0%	0.0%	0.1%	−0.1%	0.1%	0.0%	0.0%	0.1%
Enc Time[%]	142%			115%			111%
Dec Time[%]	101%			100%			101%

For Test 7, JCTVC-S0192, the implementation is not based on the common CE software. It restricts the maximum number of strings to ¼ of pixels (i.e. encoder imposed restriction). However, coding performance gain was observed as −2.0%, −1.5%, −0.9% for YUV, text & graphics with motion, 1080p sequences for the AI, RA, LB settings when compared to CTC.

It was agreed to establish a BoG (chair Y. Chen) to investigate the complexity impact, particularly:

The memory bandwidth requirements for the CE10 common software and the test 1 method (which shows interesting coding gain, but could have impact on the memory access due to switching hor/vert scan).
The worst case number of context coded bins, for the CE10 common software and the test 6 method(s)

See notes on that BoG report S0308.

The question was also raised, since the target appears similar as with intra line copy (CE4), the gains are usually lower. Due to some commonality in the target, it was suggested to combine the two CEs.

13.0.0.1.1.1.1.1.165JCTVC-S0308 BoG report on Intra String Copy (CE10) [Y. Chen]

(Chaired by J. Boyce, Thursday.)

This document provides a report of the BoG on CE 10 proposals, focusing on the memory bandwidth analysis and CABAC throughput, from 6 pm to 6:45 pm, Oct. 22.

Some worst-case results were provided. Intra string copy requires twice the memory bandwidth as Intra line copy and 3-4 times the memory bandwidth as compared to Intra BC (4x4), even when large memory access pattern is used.

Worst case CABAC bins per pixel for 4x8 in SCM 2.0 is 7.6, for Intra string copy is 3.06, and for Intra String copy Test 6.1 is 15.06, roughly twice the 4x8 in SCM 2.0 case.

It was suggested that the memory bandwidth could be limited by restricting the sizes of the strings. String size constraints could be based upon the relative prediction position.

It was agreed to have a CE on ISC.

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