spectral envelope
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Spectral envelope — In remote sensing using a spectrometer, the spectral envelope of a feature is the boundary of its spectral properties, as defined by the range of brightness levels in each of the spectral bands of interest. References *… … Wikipedia
Spectral band replication — (SBR) is a technology to enhance audio or speech codecs, especially at low bit rates and is based on harmonic redundancy in the frequency domain.It can be combined with any audio compression codec: the codec itself transmits the lower and… … Wikipedia
Timbre — Not to be confused with Timber. For the Sophie B. Hawkins album, see Timbre (album). Spectrogram of the first second of an E9 chord played on a Fender Stratocaster guitar with noiseless pickups. Below is the E9 chord audio: In music, timbre ( … Wikipedia
Vocoder — A vocoder ( /ˈvoʊk … Wikipedia
Linear predictive coding — (LPC) is a tool used mostly in audio signal processing and speech processing for representing the spectral envelope of a digital signal of speech in compressed form, using the information of a linear predictive model. It is one of the most… … Wikipedia
Tritone paradox — The tritone paradox is an auditory illusion in which a sequentially played pair of Shepard tones [1] separated by an interval of a tritone, or half octave, is heard as ascending by some people and as descending by others … Wikipedia
Colors of noise — White Pink Red (Brownian) Grey While noise is by definition derived from a random signal, it can have different characteristic statistical properties corresponding to different mappings from a source of randomness to the concrete noise. Spectral… … Wikipedia
Harmonic and Individual Lines and Noise — (HILN) is a parametric codec for audio. The basic premise of the encoder is that most audio, and particularly speech, can be synthesized from only sinusoids and noise. The encoder describes individual sinusoids with amplitude and frequency,… … Wikipedia
Microtonal music — Composer Charles Ives chose the chord above as good possibility for a fundamental chord in the quarter tone scale, akin not to the tonic but to the major chord of traditional tonality.(Boatright 1971, 8 9) … Wikipedia
Folke Rabe — (born 28 October 1935 in Stockholm, Sweden) is a Swedish composer. Works include the electronic drone pieces What?? (also translated as Was?? ) (1968), Basta for solo trombone, Escalations for brass quintet (1988), Concerto for trombone: All the… … Wikipedia
Noise — This article is about noise as an unwanted phenomenon. For other uses, see Noise (disambiguation). NASA researchers at Glenn Research Center conducting tests on aircraft engine noise in 1967 In common use, the word noise means any unwanted … Wikipedia
