Speech Coding

Speech secret writing is the application of information compression of digital audio signals containing lecturing. Speech label uses computer address-specific parameter estimation development audio signal processing techniques to model the speech signal, combine with generic data compression algorithms to represent the resulting modeled parameters in a compact bitstream.
The two nigh important applications of speech cryptograph are mobile telephony and Voice all over IP.
The techniques apply in speech code are like to that in audio data compression and audio coding where knowledge in psychoacoustics is used to transmit however data that is relevant to the human auditory system. For example, in voiceband speech coding, only information in the frequency band 400 Hz to 3500 Hz is transmitted but the reconstructed signal is salve adequate for intelligibility.
Speech coding differs from other forms of audio coding in that speech is a much simpler signal than most other audio signals, and a lot to a greater extent statistical information is available about the properties of speech. As a result, whatsoever auditory information which is relevant in audio coding can be unnecessary in the speech coding context. In speech coding, the most important criterion is economy of intelligibility and pleasantness of speech, with a constrained amount of transmitted data.




The intelligibility of speech includes, besides the actual literal content, also speaker identity, emotions, intonation, woodland etc. that are all important for perfect intelligibility. The more abstract concept of pleasantness of degraded speech is a different property than intelligibility, since it is possible that degraded speech is tout ensemble intelligible, but subjectively annoying to the listener.
Speech Quality and Evaluation
semisynthetic speech can be compared and evaluated with respect to intelligibility, naturalness, and suitability for used application (Klatt 1987, Mariniak 1993). In some applications, for example reading machines for the blind, the speech...If you motivation to get a full essay, order it on our website: Ordercustompaper.com



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