Method and device for instantly changing the speed of a speech

A device for instantly changing the speed of speech, comprising:

• an analysis processor for applying an analysis process to input speech data thereby to obtain block lengths for respective attributes of voiced sound, voiceless sound and silence;
• a block data splitter for splitting the input speech data having a voiced sound section, a voiceless sound section and a silent section into blocks having the block lengths dependent on the respective attributes;
• a block data storing portion for sequentially storing speech data split by the block data splitter as block speech data and the block lengths;
• a connection data generator for generating connection data at every moment, which are able to be replaced or inserted between adjacent block speech data to connect the adjacent block speech data each other, by using the block speech data obtained by the block data splitter;
• a connection data storing portion for sequentially storing the connection data being generated by the connection data generator;
• a connection order generator for generating block connection order of the block speech data and the connection data at every moment according to at least the block lengths output sequentially from the block data storing portion and extension scaling factors in time for the respective attributes;
• and
• a speech data connector for connecting sequentially the block speech data output from the block data storing portion and the connection data output from the connection data storing portion based on the block connection order obtained by the block connection order generator to thus generate output speech data extended in time as compared with the input speech data.