Dct Based Pitch Modification
نویسندگان
چکیده
In this paper, we propose a novel algorithm for pitch modification. The linear prediction residual is obtained from pitch synchronous frames by inverse filtering the speech signal. Then Discrete Cosine Transform (DCT) is applied on these pitch synchronous frames. Based on the desired factor of pitch modification, the dimension of the DCT vector is changed by truncation or zero padding, and then Inverse Discrete Cosine Transform is applied. This period modified residual signal is then forward filtered to obtain the pitch modified speech. The quality of the speech thus obtained is better for increased pitch frequency than for decreased pitch by the same factor. The method can be applied pitch asynchronously also, with some distortion.
منابع مشابه
Modification of pitch using DCT in the source domain
In this paper, we propose a novel algorithm for pitch modification. The linear prediction residual is obtained from pitch synchronous frames by inverse filtering the speech signal. Then the Discrete Cosine Transform (DCT) of these residual frames is taken. Based on the desired factor of pitch modification, the dimension of the DCT coefficients of the residual is modified by truncating or zero p...
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