downsampling

n. act of reducing the resolution of a digital image; act of reducing the quality of a digital sound file by lowering the frequency of the sampling ratev. reduce the resolution of a digital image; reduce the quality of a digital sound file by lowering the frequency of the sampling rate

English contemporary dictionary. 2014.

Look at other dictionaries:

  • Downsampling — In signal processing, downsampling (or subsampling ) is the process of reducing the sampling rate of a signal. This is usually done to reduce the data rate or the size of the data. The downsampling factor (commonly denoted by M) is usually an… …   Wikipedia

  • Downsampling — Der Begriff Heruntertaktung bzw. Downsampling (engl.) bezeichnet die Reduktion der Stützstellen einer Zeitreihe oder anderer Anordnungen diskreter Werte. Bis auf Sonderfälle ist das Downsampling dadurch mit Informationsverlust verbunden (im… …   Deutsch Wikipedia

  • downsampling — noun The process of reducing the sampling rate of a signal …   Wiktionary

  • Chroma Downsampling — Originalfarbbild oben und die Aufspaltung dieses Bildes in die Komponenten Luminanz Y und die beiden Chrominanzkomponenten Cb und Cr. Die Farbunterabtastung (engl. chroma subsampling [ˈkɹoʊmə ˈsʌbˌsæmplɪŋ], color subsampling) ist im Bereich von… …   Deutsch Wikipedia

  • Multi-rate digital signal processing — Multi rate signal processing studies digital signal processing systems which include sample rate conversion. Multirate signal processing techniques are necessary for systems with different input and output sample rates, but may also be used to… …   Wikipedia

  • Heruntertaktung — Der Begriff Heruntertaktung bzw. Downsampling (engl.) bezeichnet die Reduktion der Stützstellen einer Zeitreihe oder anderer Anordnungen diskreter Werte. Bis auf Sonderfälle ist das Downsampling dadurch mit Informationsverlust verbunden (im… …   Deutsch Wikipedia

  • JPEG — For other uses, see JPEG (disambiguation). Joint Photographic Experts Group A photo of a cat compressed with successively more lossy compression ratios from right to left Filename extension .jpg …   Wikipedia

  • Nyquist–Shannon sampling theorem — Fig.1: Hypothetical spectrum of a bandlimited signal as a function of frequency The Nyquist–Shannon sampling theorem, after Harry Nyquist and Claude Shannon, is a fundamental result in the field of information theory, in particular… …   Wikipedia

  • HD Lite — is an informal term used to describe the re transmission of a particular HDTV channel, at reduced picture quality compared to the source. Background In a simplified view of US digital TV distribution, the cable/sat operator receives a programing… …   Wikipedia

  • 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

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