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1. 发明授权

US06594627B1 Methods and apparatus for lattice-structured multiple description vector quantization coding 有权
标题翻译：网格结构多重描述矢量量化编码方法与装置
公开(公告)号：US06594627B1
公开(公告)日：2003-07-15
申请号：US09533232
申请日：2000-03-23
申请人： Vivek K. Goyal , Jonathan Adam Kelner , Jelena Kovacevic
发明人： Vivek K. Goyal , Jonathan Adam Kelner , Jelena Kovacevic
IPC分类号： G10L1912
CPC分类号： G10L19/12 , G10L2019/0004
摘要： A lattice-structured multiple description vector quantization (LSMDVQ) encoder generates M descriptions of a signal to be encoded, each of the descriptions being transmittable over a corresponding one of M channels. The encoder is configured based at least in part on a distortion measure which is a function of a central distortion and at least one side distortion. For example, if M=2, the distortion measure may be an average mean-squared error (AMSE) function of the form ƒ(D0, D1, D2), where D0 is a central distortion resulting from reconstruction based on receipt of both a first and a second description, and D1 and D2 are side distortions resulting from reconstruction using only a first description and a second description, respectively. Further performance improvements may be obtained through perturbation of the lattice points. The LSMDVQ techniques of the invention can also be extended to cases of M greater than two, for which the encoder may utilize an ordered set of M codebooks &Lgr;1, &Lgr;2, . . . , &Lgr;M of increasing size, with the coarsest codebook corresponding to a lattice. In such cases, for each number k of descriptions received, there may be a single decoding function that maps the received vector to a corresponding one of the codebooks &Lgr;k, such that reconstruction of the signal requires no more than M such decoding functions.
摘要翻译：格子结构的多描述矢量量化（LSMDVQ）编码器生成要编码的信号的M个描述，每个描述可以通过M个通道中的相应一个传送。该编码器至少部分地基于作为中心失真和至少一个侧面失真的函数的失真度量来配置。例如，如果M = 2，失真测量可以是形式ƒ（D0，D1，D2）的平均均方误差（AMSE）函数，其中D0是基于接收到a 第一和第二描述，D1和D2分别是仅使用第一描述和第二描述的重建产生的侧面失真。通过扰动晶格点可以获得进一步的性能改进。本发明的LSMDVQ技术也可以扩展到大于2的M的情况，编码器可以使用M个码本LAMBD1，LAMBD2的有序集合。。。，LAMBDM的尺寸越来越大，其中最粗的码本对应于格子。在这种情况下，对于接收到的每个k个描述，可以存在将接收到的矢量映射到码本LAMBDk中的相应一个的单个解码功能，使得该信号的重建需要不超过M个这样的解码功能。

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