[Mp4-tech] reference frame recompression

[santi]

Dear experts,
  Reference frames reconstructed by a 'reconstruction' path in Encoder must be stored into memory for motion compensation, which occupy most of memory resource. 
  Therefore, to reduce memory cost, it is desirable to develop some kind of frame recompression algorithms.
  I'm looking for some available data for frame recompressio methods.
  1. compression ratio
  2. algorithm description
Thanks and regards
Santi
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