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Table 4 Average PSNR results (in dB) of the best input copy and the video reconstructed by the proposed method from multiple input copies compressed with the same GOP structure at different target bit rates.

From: Video Enhancement from Multiple Compressed Copies in Transform Domain

Sequence No. of 400–600–800 (kbits/s) 700–900–1000 (kbits/s)
  copies Best copy Proposed Gain Best copy Proposed Gain
Foreman 2 37.19 37.49 0.30 38.93 39.48 0.55
  3 38.42 38.99 0.57 39.37 40.33 0.96
Mobile 2 22.54 22.86 0.32 23.86 24.28 0.43
  3 23.37 23.84 0.47 24.85 25.48 0.63
Mother and Daughter 2 43.93 44.28 0.35 45.23 45.79 0.56
  3 44.87 45.52 0.65 45.58 46.54 0.97
News 2 42.29 42.62 0.33 44.34 44.88 0.54
  3 43.77 44.33 0.56 44.91 45.80 0.89
Silent 2 39.02 39.14 0.12 41.40 41.69 0.29
  3 40.72 41.21 0.49 42.03 43.93 0.90
Flower 2 31.18 31.55 0.38 33.03 33.70 0.66
  3 32.49 33.22 0.72 33.49 34.65 1.16
Stefan 2 30.45 30.73 0.27 32.49 33.05 0.57
  3 31.82 32.43 0.61 32.95 34.08 1.13
Tennis 2 31.45 31.78 0.33 32.75 33.29 0.54
  3 32.40 32.97 0.57 32.89 34.17 1.28
Coastguard 2 32.45 32.80 0.35 34.06 34.65 0.59
  3 33.58 34.24 0.66 34.43 35.66 1.23
Tempete 2 31.52 31.85 0.32 33.23 33.81 0.58
  3 32.74 33.35 0.61 33.59 34.74 1.16