For example, Kurzweil Voice and DragonDictate transcribe discrete speech, requiring pauses between the words, yet they remain necessary for disabled people because they provide complete, hands-free control of the PC.
Then add with e0=[1, …,1] T, we construct the complete discrete speech dictionary as D = e 0 ⋃ e k, k ∈ Z ∖ 0 (8).
From the initial stages, when speech sounds like an endless stream of nonsense, infants and second language learners are able to segment it into discrete words [1], [2].
Because the outer ear and the middle ear together generate a bandpass function, we implement traditional pre-emphasis to model the combined outer and middle ear functions, where is the discrete-time speech signal,, and is the filtered output signal.
(a,c) discrete and continuous speech segments from alpha-digits and poet-verses corpora.
Figure 2a,c demonstrates two segments of discrete and continuous speech from alpha-digits and poet-verses corpora and Figure 2b,d shows the corresponding first visual feature (before normalization).
Effect of discrete and continuous speech: The performance of all methods is higher on alpha-digits corpus compared to poet-verses.
In discrete or slow speech, first visual feature shows a quasi-periodic shape corresponding to the periodic lip opening and closing.
The relatively few experiments that have examined the question of how discrete components of the speech signal are fused in perception have reliably revealed that they coalesce such that any one is no longer available for individual inspection, except under very special circumstances.
Speech scramblers play a major role in these systems and transform-domain, specially, DCT (Discrete Cosine Transform) based encryption of speech has often been a preferable choice for researchers and engineers.
The computer's ability to record and play back discrete segments of the user's speech gives it an edge over the tabletop cassette recorders traditionally used in pronunciation training.
