A discrete cosine transform (DCT) comprising a set of DCT coefficients is then derived for each block.

Image information given to a two-dimensional DCT means (2) is converted into two-dimensional DCT converted data.

The method includes the video data being transformed into a plurality of DCT coefficients.

A DCT arithmetic device for performing at least either DCT arithmetic operation or inverse DCT arithmetic operation of unit blocks having different sizes of image data.

Further, the DCT coefficients are arranged into sub-groups and the DCT coefficients are scanned according to the sub-groups.

An MPEG-2 decoder receives an MPEG-2 video stream containing discrete cosine transform (DCT) blocks and generates linear contrast enhanced DCT blocks applied to an inverse DCT processor contained therein.

The present invention computes a discrete cosine transform (DCT), for example, an 18-point DCT in a fast and efficient manner.

A zero-value index, corresponding to the average number of zero value quantised DCT coefficients per DCT, is determined.

4 Please refer to McDonagh, Taylor & Blanchette (2002) for a more detailed overview of the correctional adaptation of DBT and a discussion regarding three DBT models delivered within CSC: Comprehensive DBT, General DBT, and Secure DBT.

The old and new video bitstreams or sequences separately undergo a 2-dimensional convolution between its decoded DCT coefficients and stored DCT coefficients of a particular known wipe function.

If so, a discrete cosine transform (DCT) is performed to produce a set of DCT coefficients for at least one AC frequency band in the decompressed video data.

A method and apparatus using the discrete cosine transform (DCT) to resize the image (108).

Each of the plurality of scaled DCT coefficients is then Huffman coded.

A direct 2-D matrix factorization approach is utilized to compute the 2-D DCT/IDCT.

The best known is DBT (Dialectical Behavioral Therapy).