Title :
A perturbation-based pre-processing algorithm for CELP-coders
Author :
Jensen, Jesper ; Jensen, Søren Holdt ; Hansen, Egon
Author_Institution :
Inst. for PersonKommunikation, Aalborg Univ., Denmark
Abstract :
A novel pre-processing algorithm for CELP-coders is proposed. The algorithm aims at perturbing the original signal slightly, such that the perturbed signal is subjectively indistinguishable from the original but can be coded more effectively. A key feature of the algorithm is the possibility of controlling the frequency domain properties of the perturbations. Preliminary simulations with the proposed algorithm in combination with a CELP-like coder indicate improvements in terms of segmental SNR and subjective speech quality
Keywords :
frequency-domain analysis; linear predictive coding; perturbation techniques; speech coding; speech intelligibility; CELP-coders; frequency domain properties; perturbation-based pre-processing algorithm; perturbed signal; segmental SNR; simulations; subjective speech quality; Decoding; Distortion; Encoding; Equations; Filters; Frequency domain analysis; Linear predictive coding; Signal synthesis; Speech coding;
Conference_Titel :
Speech Coding Proceedings, 1999 IEEE Workshop on
Conference_Location :
Porvoo
Print_ISBN :
0-7803-5651-9
DOI :
10.1109/SCFT.1999.781515
