Opened 9 years ago

Closed 9 years ago

Last modified 9 years ago

#1438 closed defect (worksforme)

HM-16.7 compression issue

Reported by: kolya Owned by:
Priority: minor Milestone: HM-16.7
Component: HM Version:
Keywords: compression Cc: ksuehring, davidf, karlsharman, jct-vc@…

Description

There is my logs after testing BQSquare as an anchor with a command line
-c cfg/encoder_randomaccess_main.cfg -c cfg/per-sequence/BQSquare.cfg

If a refer to HM-15.0 anchor result on ​ftp://ftp.kw.bbc.co.uk/hevc/hm-15.0-anchors/cross-check/; I get the BD-rate loss ~12%.

Is there anything I am doing wrong?

Attachments (1)

Anchor_16.7.zip​ (61.5 KB) - added by kolya 9 years ago.
BQSquare RA=Main logs for HM-16.7

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Change History (2)

Changed 9 years ago by kolya

BQSquare RA=Main logs for HM-16.7

comment:1 Changed 9 years ago by karlsharman

  • Resolution set to worksforme
  • Status changed from new to closed

For "randomaccess" simulations you need to specify the intra period,
using the command line parameter -ip.

For the randomaccess configurations, the intra period should be set to produce an intra picture roughly every 1s. Intra periods are also only produced on GOP boundaries, and so are the nearest multiple of 8:

For 60Hz frame rate, use -ip 64
For 50Hz frame rate, use -ip 48
For 30Hz frame rate, use -ip 32 (this is the default value in randomaccess.cfg)
For 24Hz frame rate, use -ip 24
For 20Hz frame rate, use -ip 20.

This can be seen in section 1.1 of JCTVC-P1006 (RExt (v2) test conditions) and section 4 of JCTVC-L1100 (HM v1 test conditions)

Version 0, edited 9 years ago by karlsharman (next)
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