Data compression techniques such as Shannon-Fano-Elias coding are often used in conjunction with cryptography. We discuss using Shannon-Fano-Elias codes for encryption. We focus mainly on the problem of deciphering a binary sequence that has been Shannon-Fano-Elias encoded. We show that if a ...
The method is also unique in its use of Shannon-Fano-Elias codes in efficient suffix sorting. To our knowledge, this is the first time information- theoretic methods have been used as the basis for solving the suffix sorting problem. 展开 关键词:...
生物多样性指数-Shannon公式探源
Assuming thatxis emitted by a random sourceXwith probabilityP(x), we can transmitxusing the Shannon-Fano code. This uses (up to rounding) – logP(x) bits. By Shannon's noiseless coding theorem this is optimalon average, the average taken over the probability distribution of outcomes from ...
For instance, the Shannon coding (and Shannon–Fano) sorts the symbols of an alphabet according to their probabilities, assigning smaller binary self-delimited sequences to symbols that appear more frequently. Such methods form the base of many, if not most, commonly used compression algorithms. ...