Opened 7 years ago

Last modified 7 years ago

#1277 new defect

DPB size in HM — at Initial Version

Reported by: adarsh Owned by:
Priority: minor Milestone:
Component: HM Version: HM-14.0
Keywords: Cc: fbossen, ksuehring, davidf, jct-vc@…

Description

The following code exists in the HM decoder in TDecTop::xGetNewPicBuffer:

if ( !bBufferIsAvailable )
{

There is no room for this picture, either because of faulty encoder or dropped NAL. Extend the buffer.
m_iMaxRefPicNum++;
rpcPic = new TComPic();
m_cListPic.pushBack( rpcPic );

}

It basically allocates memory more than the size indicated by the DPB, which should not be permitted. It is particularly significant in testing bitstream conformance, to ensure that a bitstream does not accidentally exceed the signalled DPB size but HM decoder doesn't catch it.

Change History (0)

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  • Adarsh Krishnan Ramasubramonian(Reporter)
  • David Flynn(Subscriber)
  • Frank Bossen(Subscriber)
  • jct-vc@…(Subscriber)
  • karl.sharman@…(Always)
  • Karsten Suehring(Subscriber, Participant, Always)