704 / | HD | DATA PROCESSING: SPEECH SIGNAL PROCESSING, LINGUISTICS, LANGUAGE TRANSLATION, AND AUDIO COMPRESSION/DECOMPRESSION |
200 | DF | SPEECH SIGNAL PROCESSING {4} |
201 | DF | .~ For storage or transmission {12} |
226 | DF | .~.~ Noise {2} |
227 | .~.~.~ Pretransmission |