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  2. METAR - Wikipedia

    en.wikipedia.org/wiki/METAR

    The following is an example METAR from Burgas Airport in Burgas, Bulgaria. It was taken on 4 February 2005 at 16:00 Coordinated Universal Time (UTC). METAR LBBG 041600Z 12012MPS 090V150 1400 R04/P1500N R22/P1500U +SN BKN022 OVC050 M04/M07 Q1020 NOSIG 8849//91= METAR indicates that the following is a standard hourly observation.

  3. Colour state - Wikipedia

    en.wikipedia.org/wiki/Colour_state

    The colour state may be appended to a METAR report. A short period forecast called a TREND which covers the following two hours from the observation may also be added, often with reference to the colour state.

  4. Speech coding - Wikipedia

    en.wikipedia.org/wiki/Speech_coding

    For example, in voiceband speech coding, only information in the frequency band 400 to 3500 Hz is transmitted but the reconstructed signal retains adequate intelligibility. Speech coding differs from other forms of audio coding in that speech is a simpler signal than other audio signals, and statistical information is available about the ...

  5. Surface weather observation - Wikipedia

    en.wikipedia.org/wiki/Surface_weather_observation

    ASOS sensors, located at Salinas, California. Surface weather observations have traditionally been taken at airports due to safety concerns during takeoffs and landings. The ICAO defines the International Standard Atmosphere (also known as ICAO Standard Atmosphere), which is the model of the standard variation of pressure, temperature, density, and viscosity with elevation/altitude in the ...

  6. List of codecs - Wikipedia

    en.wikipedia.org/wiki/List_of_codecs

    FFmpeg (by default decoder only, but see above the compiling options to incorporate the OpenCORE lib) AMR-WB. 3GPP TS 26.173 – AMR-WB speech Codec (C-source code) – reference implementation [12] opencore-amr (decoder), from OpenCORE (one may compile ffmpeg with—enable-libopencore-amrwb to incorporate the OpenCORE lib)

  7. Variable-Rate Multimode Wideband - Wikipedia

    en.wikipedia.org/wiki/Variable-Rate_Multimode...

    Variable-Rate Multimode Wideband (VMR-WB) is a source-controlled variable-rate multimode codec designed for robust encoding/decoding of wideband/narrowband speech. The operation of VMR-WB is controlled by speech signal characteristics (i.e., source-controlled) and by traffic condition of the network (i.e., network-controlled mode switching).

  8. International Phonetic Alphabet chart - Wikipedia

    en.wikipedia.org/wiki/International_Phonetic...

    The following is the chart of the International Phonetic Alphabet, a standardized system of phonetic symbols devised and maintained by the International Phonetic Association. It is not a complete list of all possible speech sounds in the world's languages, only those about which stand-alone articles exist in this encyclopedia.

  9. Speech transmission index - Wikipedia

    en.wikipedia.org/wiki/Speech_transmission_index

    Speech Transmission Index (STI) is a measure of speech transmission quality. The absolute measurement of speech intelligibility is a complex science. The STI measures some physical characteristics of a transmission channel (a room, electro-acoustic equipment, telephone line, etc.), and expresses the ability of the channel to carry across the characteristics of a speech signal.