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Waveform coders and Vocoders are the types of ____________(a) Speech coders(b) Modulation technique(c) Frequency translation methods(d) Channel allocation for transmissionThis question was addressed to me during an online interview.Enquiry is from Frequency Domain Coding of Speech in chapter Speech Coding of Wireless/Mobile

Answer» RIGHT answer is (a) Speech CODERS

For explanation I would say: Speech coders can be classified into waveform coders and Vocoders. Waveform coders convert the ANALOG signal into digital signal. Vocoders EXPLOIT the SPECIAL properties of speech signal to reduce the bit rate.


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