discrete-cosine transform

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• Discrete cosine transform — A discrete cosine transform (DCT) expresses a sequence of finitely many data points in terms of a sum of cosine functions oscillating at different frequencies. DCTs are important to numerous applications in science and engineering, from lossy… …   Wikipedia

• Discrete cosine transform — Transformée en cosinus discrète La transformée en cosinus discrète ou TCD (de l anglais : DCT ou Discrete Cosine Transform) est une transformation proche de la transformée de Fourier discrète (DFT). Le noyau de projection est un cosinus et… …   Wikipédia en Français

• Modified discrete cosine transform — The modified discrete cosine transform (MDCT) is a Fourier related transform based on the type IV discrete cosine transform (DCT IV), with the additional property of being lapped: it is designed to be performed on consecutive blocks of a larger… …   Wikipedia

• Discrete Fourier transform — Fourier transforms Continuous Fourier transform Fourier series Discrete Fourier transform Discrete time Fourier transform Related transforms In mathematics, the discrete Fourier transform (DFT) is a specific kind of discrete transform, used in… …   Wikipedia

• Discrete sine transform — In mathematics, the discrete sine transform (DST) is a Fourier related transform similar to the discrete Fourier transform (DFT), but using a purely real matrix. It is equivalent to the imaginary parts of a DFT of roughly twice the length,… …   Wikipedia

• Discrete cosine transform — …   Википедия

• discrete cosine transform —    An audio coding algorithm …   IT glossary of terms, acronyms and abbreviations

• Discrete wavelet transform — An example of the 2D discrete wavelet transform that is used in JPEG2000. The original image is high pass filtered, yielding the three large images, each describing local changes in brightness (details) in the original image. It is then low pass… …   Wikipedia

• Discret cosine transform — Transformée en cosinus discrète La transformée en cosinus discrète ou TCD (de l anglais : DCT ou Discrete Cosine Transform) est une transformation proche de la transformée de Fourier discrète (DFT). Le noyau de projection est un cosinus et… …   Wikipédia en Français

• Transform coding — is a type of data compression for natural data like audio signals or photographic images. The transformation is typically lossy, resulting in a lower quality copy of the original input.In transform coding, knowledge of the application is used to… …   Wikipedia

• Transformee en cosinus discrete — Transformée en cosinus discrète La transformée en cosinus discrète ou TCD (de l anglais : DCT ou Discrete Cosine Transform) est une transformation proche de la transformée de Fourier discrète (DFT). Le noyau de projection est un cosinus et… …   Wikipédia en Français