| 1 |
idea: periodical I-frames coded with wavelets
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| 2 |
implementation:
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codec/viewer running on CIF/QCIF formats
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| 3 |
results for I-frame:
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0.75dB gain for QCIF,
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1.5dB for CIF
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| 4 |
impact of I-frames on P-frames:
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strong correlation for low-motion sequences, P-frame quality controlled with DCT quantization step
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| 5 |
drawback:
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decoding of wavelet-compressed frame takes ~2-3 times longer than decoding of DCT-compressed frame
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| 6 |
possible enhancement:
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transform speedup with all-pass filters (in progress)
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