Advanced packet-video coding based on layered VQ and SBC techniques
Advanced packet-video coding based on layered VQ and SBC techniques
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基于分层 VQ 和 SBC 技术的高级分组视频编码
DOI：
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发表时间：
1993
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通讯作者：
J. Ohm
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文献类型：
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作者：
J. Ohm
将两种子带编码矢量量化（SBC-VQ）方案（基于正交镜像滤波器的训练码本矢量量化方案和基于并行滤波器组的格型矢量量化方案）的性能与当前图像编码标准中使用的离散余弦变换标量量化（DCT-SQ）方案的性能进行了比较。这些空间编码器的两层版本在与用于帧间数据压缩的运动补偿预测的混合组合中进行评估。由于SBC方案与晶格VQ被发现执行最好的，这种编码方案进一步研究结合更复杂的帧间数据压缩方案。在对隔行CCIR 601序列的压缩中，采用格型矢量量化的运动补偿三维SBC编码器的性能优于目前标准编码器中使用的技术几dB。这种编码器的性能是非常强大的异步传输模式（ATM）的信元丢失，由于非递归解码器结构的存在。>
The performances of two subband-coding-vector-quantization (SBC-VQ) schemes (a quadrature-mirror-filter-based SBC with trained-codebook VQ and a parallel-filterbank SBC with lattice VQ) are compared to that of a DCT-SQ (discrete-cosine-transform-scalar-quantization) scheme as it is used in present image-coding standards. Two-layer versions of these spatial coders are evaluated in a hybrid combination with motion-compensation prediction for interframe data compression. As the SBC scheme with lattice VQ is found to perform the best, this coding scheme is further investigated in combination with more sophisticated interframe-data-compression schemes. The motion-compensated 3-D SBC coder with lattice VQ was found to outperform the techniques used in current standard coders by several dBs in the compression of interlaced CCIR 601 sequences. The performance of this coder is extremely robust in the presence of asynchronous transfer mode (ATM) cell losses due to the nonrecursive decoder structure. >