The invention discloses a
system for realizing sound speed variation and tone variation, which comprises an input cache module, a tone variation
processing module, a speed-variation no-tone-variation
processing module and a data output module, wherein the input cache module is used for reading the sound
signal data to be processed into the cache; the tone variation
processing module is used for carrying out the tone variation processing on the sound
signal to change the sound tone; the speed-variation no-tone-variation processing module is used for carrying out the speed-variation no-tone-variation processing on the sound
signal, thereby changing the sound speed without changing the tone; and the data output module is used for outputting the speed-variation tone-variation signal. The speed-variation no-tone-variation processing module comprises a segmentation data module and a connection data module, wherein the speed-variation no-tone-variation processing module extracts a string of signal subfamilies (namely small sections of sound) from the original speech signal according to the
coefficient of variation in speed by using a
window function; and the connection data module connects the signal subfamilies according to the
time sequence, thereby obtaining the speed-variation no-tone-variation signal. The invention realizes the speed-variation no-tone-variation function and the speed-variation tone-variation function of the
audio frequency by using very low
algorithm complexity, and does not introduce
noise, thereby enhancing the quality of the processed sound.