Apparatus for converting encoded data into image data, including

Details Apparatus for converting encoded data into image data, including Apparatus for converting encoded data into image data, including

1994-02-09

1995-09-26

Razavi, Michael T.

Television

Bandwidth reduction system

Data rate reduction

348403, 348405, 382246, 382251, H04N 712

Patent

active

054537886

ABSTRACT:
An image processing apparatus includes: a first transforming device for transforming encoded data into discrete cosine transform coefficient data segmented into processing blocks, each block being formed of a matrix of m.times.n pixels; and a setting device for setting the values of M and N defining the size of a matrix forming each processing block used in inverse discrete cosine transform. The image processing apparatus also includes a data preparing circuit for adding discrete cosine transform coefficient data to, or deleting discrete cosine transform coefficient data from, a high-frequency domain of the discrete cosine transform coefficient data and segmented into processing blocks, each block being formed of a matrix of m.times.n pixels, and for preparing discrete cosine transform coefficient data segmented into processing blocks, each block being formed of a matrix of M.times.N pixels; a second transforming device for subjecting the discrete cosine transform coefficient data prepared by the data preparing circuit to inverse discrete cosine transform, so that image data can be output; and an outputting device for outputting image data output from the second transforming device and segmented into processing blocks as continuous image data.

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patent: 5107345 (1992-04-01), Lee
patent: 5216516 (1993-06-01), Tanaka et al.
patent: 5227875 (1993-07-01), Sun et al.

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