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In this paper , we present a digital signal processor -LRB- DSP -RRB- implementation of real-time statistical voice conversion -LRB- VC -RRB- for silent speech enhancement and electrolaryngeal speech enhancement .
 digital signal processor -LRB- DSP -RRB- implementation, real-time statistical voice conversion -LRB- VC -RRB-; real-time statistical voice conversion -LRB- VC -RRB-, silent speech enhancement; real-time statistical voice conversion -LRB- VC -RRB-, electrolaryngeal speech enhancement; silent speech enhancement, electrolaryngeal speech enhancement
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
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Answer:
 digital signal processor -LRB- DSP -RRB- implementation, real-time statistical voice conversion -LRB- VC -RRB-; real-time statistical voice conversion -LRB- VC -RRB-, silent speech enhancement; real-time statistical voice conversion -LRB- VC -RRB-, electrolaryngeal speech enhancement; silent speech enhancement, electrolaryngeal speech enhancement