id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
1169	HM-12.0-RExt-4.1 encoder bug when enabling large-TU transformSkip and RDPCM	xipe		"In HM-12.0-RExt-4.1 RCE3 software, I encounterd the following problem. 

When enabling large-TU transformSkip and RDPCM by setting TransformSkipLog2MaxSize=5 and TransformSkipFast=0, I run the encoding several times but each time the encoding results are different. Three different results as below appear
1) Bitrate 28163.0400 Y-PSNR 39.0933 U-PSNR 38.6322 V-PSNR 38.9020
2) Bitrate 28185.1200 Y_PSNR 39.0793 U-PSNR 38.6377 V-PSNR 38.9982
3) Bitrate 28092.9600 Y-PSNR 39.1154 U-PSNR 38.6070 V-PSNR 39.0385
The test condition is sc_wordEditing_1280x720_60_8bit_444.yuv, only encode the first frame, QP 32, Release x64

However, when I disabling RDPCM by setting the macro ""RExt__NRCE2_RESIDUAL_DPCM"" to 0 and still enable the large-TU transformSkip, the problem disappears.

Another point is that when I enable TS only on 4x4, this problem also doesn't occur.

There might be some memory leak bug in the encoder but I didn't find the place. Did anybody encounter the same problem in the test?"	defect	closed	major	HM+RExt-4.2	HM RExt	RExt-4.1 (HM-12.0)	fixed		fbossen ksuehring davidf jct-vc@… karlsharman jct-vc@…