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Memoryless quantization means that the channel direction at each TTI is quantized in isolation, using the same quantization codebook every time.
These pilot symbols are quantized at the relay using the same quantization method as was used for the data symbols.
The codebooks for different users are also independently generated to avoid the case that multiple users quantize their channel directions to the same quantization vector.
Based on the watermark embedding locations provided by the key, each of the wavelet coefficients, obtained in Step 1, is quantized into the symbol "0" or "1", using the same quantization function employed during the embedding process, namely, (6).
Two scenarios namely transcoding with the same quantization parameter and bitrate reduction are considered.
All OTT blocks for different channel pair signals share the same quantization codebooks of spatial parameters.
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In parallel, the distortion-rate values were also calculated for usual frame-by-frame quantization using the same quantizers than in the LT coding process, and using the same test corpus.
We can do the same with quantization.
Following the same VT quantization procedure, the local descriptors {y j } in d m are mapped to a high-dimensional sparse Bag-of-Words (BoW) histogram (mathbf {H}_{d}=[h_{1}^{d},ldots,h_{C}^{d}]).
Due to DCT grid aligned double JPEG compression, all DCT coefficients present at a specific frequency in 8 × 8 blocks are quantized with the same set of quantization steps q1 ∈ Q1 and q2 ∈ Q2 respectively, where Q1 and Q2 represents the primary and secondary quantization tables.
HEVC uses essentially the same uniform reconstruction quantization scheme controlled by a quantization parameter (QP) as in H.264/MPEG-4 H.264/MPEG-4
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