DVB / MPEG-2 algorithm that facilitates intra-frame coding, by concentrating the signal energy in only a few coefficients.

Digital Component Technology, a format for component digital video tape recorders with 10-bit sampling and mild compression. Introduced in 1992 by Ampex.

Discrete Cosine Transform. The basic mathematical algorithm employed by most lossy video compression techniques such as MPEG, JPEG, and H.26x. Used to convert data between the spatial domain and the frequency domain.

Discrete cosine transform. Mathematical algorithm used to generate frequency representations of a block of video pixels. The DCT is an invertible, discrete orthogonal transformation between time and frequency domain. It can be either forward discrete cosine transform (FDCT) or inverse discrete cosine transform (IDCT).

Discrete Cosine Transform - basic buildign block for H.261 and MPEG Video Compression

stands for discrete cosine transform.

Abbreviation for Discrete Cosine Transform, a mathematical technique, similar to the Fourier Transform, used in a variety of signal processors The Ampex tradename for a component digital tape recording format with signal compression. At the interface.

Discrete Cosine Transform. Many encoders, including those that conform to the JPEG, MPEG-1, and H.261 standards, perform a DCT on an 8-by-8 block of image data as part of the image-compression process. The DCT converts the video data from the spatial domain to the frequency domain. The DCT takes an 8-by-8 matrix, whose values represent brightness levels at particular , coordinates, and produces an 8-by-8 matrix whose values represent relative amounts of the 64 spatial frequencies that make up the input data's spectrum. The DCT provides a basis for compression because most of the frequency levels for a block will be zero or close to zero and do not need to be encoded.

The Discrete Cosine Transform is the technique for getting at the redundancy which is in television images in order to reduce the data rate. It is a fundamental part of the MPEG-2 compression process.

This is a transform that takes spatial pixel values and calculates the frequencies present & their energies. This is useful in compression because the transform has the effect of concentrating most of the energy present in a block of the image into very few significant frequency coefficients. It is just these coefficients that need to be sent to describe the picture block. This transform is the heart of all standardised picture compression schemes.

Discrete cosine transform. An invertible, discrete, orthogonal transformation. Got that? A mathematical process used in MPEG video encoding to transform blocks of pixel values into blocks of spatial frequency values with lower-frequency components organized into the upper-left corner, allowing the high-frequency components in the lower-right corner to be discounted or discarded. Also digital component technology, a videotape format.

Discrete Cosine Transform. Used principally in digital video compression systems such as MPEG-2, which are designed to remove unimportant or irrelevant ("redundant") information from television pictures, thus reducing the amount of data to be conveyed to the receiver. Redundant information could be, for example, the static background of a scene in which only a single person or object is moving, which only needs to be sent to the receiver once. The DCT is one mathematical technique for identifying and removing this redundant data without unduly degrading the picture quality.

Discrete Cosine Transform: used in the JPEG and MPEG image compression algorithms. Refers to the coding methodology used to reduce the number of bits for actual data compression. DCT transforms a block of pixel intensities into a block of frequency transform coefficients. The transform is then applied to new blocks until the entire image is transformed.

Discrete Cosine Transform used in intra-encoding JPEG and MPEG frames. DCT coding encodes a block of 8 x 8 pixels at a time transforming the pixels from the spatial domain to the frequency domain.

Discrete Cosine Transform. A widely used method of video compression. Also an Ampex CCIR 601 digital VTR using DCT to compress the video before recording it to tape.

Discrete Cosine Transform, this is the Cosine of the infinite Fourier series.

Discrete Cosine Transform - The DCT is a transform from the spatial to the frequency domain. It results in an energy compaction in the frequency domain.

Discrete Cosine Transform. A technique used to achieve spatial compression of a video stream. It transforms a block of pixel values into a set of "spatial frequency" coefficients. See also IDCT

Discrete Cosine Transform. Mathematical transform used in digital video compression. Used in JPEG, MPEG-1, MPEG-2, H.261, H.263, H.263+, and DV digital video compression.

Discrete Cosine Transform. This is an algorithm that converts data--including pixels--into sets of frequencies. The first frequencies appearing in the set are the most meaningful; the latter, are the least. For compression purposes, such as JPEG and MPEG, the latter frequencies are removed on the basis on allowable resolution loss.

Discrete Cosine Transform. A somewhat lossy MPEG compression algorithm that increases the efficiency of entropy coding.

See discrete-cosine transform.