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・ Deleted in Colorectal Cancer
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Deletion channel
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Deletion channel : ウィキペディア英語版
Deletion channel
A deletion channel is a communications channel model used in coding theory and information theory. In this model, a transmitter sends a bit (a zero or a one), and the receiver either receives the bit (with probability p) or does not receive anything without being notified that the bit was dropped (with probability 1-p). Determining the capacity of the deletion channel is an open problem.〔.〕〔.〕
The deletion channel should not be confused with the binary erasure channel which is much simpler to analyze.
== Formal description ==

Let p be the deletion probability, 0 < p < 1. The iid binary deletion channel is defined as follows: given a input sequence of n bits (X_i) as input, each bit in X_n can be deleted with probability p. The deletion positions are unknown to the sender and the receiver. The output sequence (Y_i) is the sequence of the (X_i) which were not deleted, in the correct order and with no errors.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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