Data compression

Image analysis – Image compression or coding – Adaptive coding

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Details

382248, 382251, 358430, 358433, G06T 900

Patent

active

056848960

ABSTRACT:
A data compression apparatus is described which applies a dynamically variable degree of quantisation Q.sub.s to input data so as to control blocks of output data to have a predetermined maximum size. The dynamic control can be carried out on an inter-block basis or an intra-block basis. An overflow detector is provided for inserting an overflow indicator within blocks of compressed data to indicate when overflow has occurred.

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patent: 5196933 (1993-03-01), Henot
Ngan, et al. "Adaptive Cosine Transform Coding of Images in perceptual Domain" IEEE. Trans. Acoustics, Speech and Sig. Proc. vol.: 37, Iss:11, pp. 1743-1750, Nov. 1989.
WH Chen & WK Pratt, IEEE Trans. Comm., vol. COM-32 (3), Mar. 1984, pp. 225-232.

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