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  2. Perceptual Evaluation of Speech Quality - Wikipedia

    en.wikipedia.org/wiki/Perceptual_Evaluation_of...

    NR algorithms (e.g., Recommendation ITU-T P.563 [7]) are low-accuracy estimates only, as the originating voice characteristics (e.g., male or female talker, background noise, non-voice) of the source reference is completely unknown. A common variant of NR algorithms does not even analyze the decoded audio signal, but works on an analysis of the ...

  3. Telephony - Wikipedia

    en.wikipedia.org/wiki/Telephony

    The history of telephony is intimately linked to the invention and development of the telephone. Telephony is commonly referred to as the construction or operation of telephones and telephonic systems and as a system of telecommunications in which telephonic equipment is employed in the transmission of speech or other sound between points, with ...

  4. List of telephony terminology - Wikipedia

    en.wikipedia.org/wiki/List_of_telephony_terminology

    Call originator - (or calling party, caller or A-party) a person or device that initiates a telephone call by dialling a telephone number. Call waiting - a system that notifies a caller of another incoming telephone call by sounding a sound in the earpiece. Called party - (or callee or B-party) Caller; Calling party; Conference call (multi ...

  5. Telephone - Wikipedia

    en.wikipedia.org/wiki/Telephone

    A sound-powered telephone is a telephone which transmits voice communication by wire, powered by the energy of the sound waves of the operator speaking. Principle of operation A moving-coil microphone converts the sound waves into an electrical signal, which is then converted back into sound waves at the receiver's end.

  6. Telephone call - Wikipedia

    en.wikipedia.org/wiki/Telephone_call

    A telephone call or telephone conversation (or telcon [1] [a]), also known as a phone call or voice call (or simply a call), is a connection over a telephone network between the called party and the calling party. Telephone calls started in the late 19th century, initially relying on analog systems.

  7. File:VOQS chart (2016).pdf - Wikipedia

    en.wikipedia.org/wiki/File:VOQS_chart_(2016).pdf

    This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.

  8. Mobile telephony - Wikipedia

    en.wikipedia.org/wiki/Mobile_telephony

    Mobile telephony is the provision of wireless telephone services to mobile phones, distinguishing it from fixed-location telephony provided via landline phones. Traditionally, telephony specifically refers to voice communication , though the distinction has become less clear with the integration of additional features such as text messaging and ...

  9. Phone (phonetics) - Wikipedia

    en.wikipedia.org/wiki/Phone_(phonetics)

    Whereas a phone is a concrete sound used across various spoken languages, a phoneme is more abstract: any class of phones that the users of a particular language nevertheless perceive as a single basic sound, a single unit, and that distinguishes words from other words. If a phoneme is swapped with another phoneme inside a word, it can change ...

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