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- W2599580500 abstract "Distance plays a vital role in many applications of data analytics. In this paper, the concept of distance between any two data objects X and Y is addressed from the perspective of Shannon information theory. Consider a coding paradigm where X and Y are encoded into a sequence of coded bits specifying a codeword (or method) which would in turn convert Y into X, and X into Y such that both the distortion between X and X and the distortion between Y and Y are less than or equal to a prescribed threshold D. Given a class C of coding schemes within the coding paradigm, the information distance R C (X, Y, D) between X and Y at the distortion level D is defined as the smallest number of coded bits afforded by coding schemes from C. For two important classes C, R C (X, Y, D) is shown to be indeed a pseudo distance in some sense; it is further characterized or bounded. When C is the class of so-called separately precoded broadcast codes, it is shown that for any stationary, totally ergodic sources X and Y, RC (X, Y, D) is equal to the maximum of the Wyner-Ziv coding rate of X with Y as side information and the Wyner-Ziv coding rate of Y with X as side information. In the general case where C consists of all codes within the coding paradigm, upper and lower bounds to R C (X, Y, D) are established, and are further shown to be tight when X and Y are jointly Gaussian. The distance R C (X, Y, D) generalizes the notion of information distance defined within the framework of Kolmogorov complexity." @default.
- W2599580500 created "2017-04-07" @default.
- W2599580500 creator A5080794633 @default.
- W2599580500 date "2016-01-01" @default.
- W2599580500 modified "2023-09-27" @default.
- W2599580500 title "On coding for data analytics: New information distances" @default.
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- W2599580500 doi "https://doi.org/10.1109/ita.2016.7888180" @default.
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