Opened 15 years ago

Last modified 11 years ago

#57 closed enhancement

Excessive memory allocation — at Version 1

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

Description (last modified by fbossen)

Memory allocation is excessive, possibly leading to crashes.

Memory usage has been analyzed for the following case:
class B encoding with max CU=32x32, memory snapshot during encoding of 2nd frame

  • Transform coefficients:

9 TComList objects
2040 CUs per frame
3 32x32 integer arrays per CU (luma+2*chroma), each array is 4KB
9 * 2040 * 3 * 32 * 32 * 4 = 215MB

  • Luma frame buffers: 40 * 4.48MB = 179MB
  • Chroma frame buffers: 79 * 1.12MB = 89MB
  • Bitstream buffers (TComBitStream objects): 8 * 11.87MB = 95MB

Also see attached jpeg file

Change History (3)

comment:1 Changed 15 years ago by fbossen

  • Description modified (diff)

Changed 15 years ago by fbossen

Changed 15 years ago by ichong

Qualcomm's patch for more efficient memory usage

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