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  2. History of videotelephony - Wikipedia

    en.wikipedia.org/wiki/History_of_videotelephony

    By 1930, AT&T's "two-way television-telephone" system was in full-scale experimental use. [7] [20] The Bell Labs' Manhattan facility devoted years of research to it during the 1930s, led by Dr. Herbert Ives along with his team of more than 200 scientists, engineers and technicians, intending to develop it for both telecommunication and broadcast entertainment purposes.

  3. Videotelephony - Wikipedia

    en.wikipedia.org/wiki/Videotelephony

    Videophones that work on regular phone lines typically use H.324, but the bandwidth is limited by the modem to around 33 kbit/s, limiting the video quality and frame rate. A slightly modified version of H.324 called 3G-324M defined by 3GPP is also used by some cellphones that allow video calls, typically for use only in UMTS networks.

  4. Iconicity - Wikipedia

    en.wikipedia.org/wiki/Iconicity

    e. In functional- cognitive linguistics, as well as in semiotics, iconicity is the conceived similarity or analogy between the form of a sign (linguistic or otherwise) and its meaning, as opposed to arbitrariness (which is typically assumed in structuralist, formalist and generative approaches to linguistics). The principle of iconicity is also ...

  5. History of communication - Wikipedia

    en.wikipedia.org/wiki/History_of_communication

    The history of communication itself can be traced back since the origin of speech circa 100,000 BCE. [1] The use of technology in communication may be considered since the first use of symbols about 30,000 years BCE. Among the symbols used, there are cave paintings, petroglyphs, pictograms and ideograms. Writing was a major innovation, as well ...

  6. Intonation (linguistics) - Wikipedia

    en.wikipedia.org/wiki/Intonation_(linguistics)

    Declarative sentences show a 2–3–1 pitch pattern. If the last syllable is prominent the final decline in pitch is a glide. For example, in This is fun, this is is at pitch 2, and fun starts at level 3 and glides down to level 1. But if the last prominent syllable is not the last syllable of the utterance, the pitch fall-off is a step.

  7. Prosody (linguistics) - Wikipedia

    en.wikipedia.org/wiki/Prosody_(linguistics)

    v. t. e. In linguistics, prosody (/ ˈprɒsədi, ˈprɒz -/) [1][2] is the study of elements of speech that are not individual phonetic segments (vowels and consonants) but which are properties of syllables and larger units of speech, including linguistic functions such as intonation, stress, and rhythm. Such elements are known as suprasegmentals.

  8. Signal - Wikipedia

    en.wikipedia.org/wiki/Signal

    A video signal is a sequence of images. A point in a video is identified by its two-dimensional position in the image and by the time at which it occurs, so a video signal has a three-dimensional domain. Analog video has one continuous domain dimension (across a scan line) and two discrete dimensions (frame and line). Biological membrane ...

  9. Symbolic communication - Wikipedia

    en.wikipedia.org/wiki/Symbolic_communication

    Symbolic communication is the exchange of messages that change a priori expectation of events. Examples of this are modern communication technology and the exchange of information amongst animals. By referring to objects and ideas not present at the time of communication, a world of possibility is opened.