Variable-to-fixed length codes: a geometrical approach to low-complexity source codes

2002 ◽  
Author(s):  
T. Tjalkens ◽  
F. Willems
Keyword(s):  
Low Complexity ◽  
Geometrical Approach ◽  
Source Codes ◽  
Fixed Length

A SIMPLE LOSSLESS COMPRESSION HEURISTIC FOR GREY SCALE IMAGES

2005 ◽  
Vol 16 (06) ◽  
pp. 1111-1119 ◽  
Author(s):  
LUIGI CINQUE ◽  
SERGIO DE AGOSTINO ◽  
FRANCO LIBERATI ◽  
BART WESTGEEST
Keyword(s):  
Lossless Compression ◽  
Low Complexity ◽  
Gray Scale ◽  
Fixed Length ◽  
Grey Scale ◽  
Length Code

In this paper, we show a simple lossless compression heuristic for gray scale images. The main advantage of this approach is that it provides a highly parallelizable compressor and decompressor. In fact, it can be applied independently to each block of 8×8 pixels, achieving 80 percent of the compression obtained with LOCO-I (JPEG-LS), the current lossless standard in low-complexity applications. The compressed form of each block employs a header and a fixed length code, and the sequential implementations of the encoder and decoder are 50 to 60 percent faster than LOCO-I.

Universal variable-to-fixed length source codes

2001 ◽  
Vol 47 (4) ◽  
pp. 1461-1472 ◽  
Author(s):  
K. Visweswariah ◽  
S.R. Kulkarni ◽  
S. Verdu
Keyword(s):  
Source Codes ◽  
Fixed Length ◽  
Universal Variable

A Fixed Field/Fixed Length Automated Case Record Using an IBM 1232 Optically Readable Document

1968 ◽  
Vol 07 (03) ◽  
pp. 156-158
Author(s):  
Th. R. Taylor
Keyword(s):  
Clinical Data ◽  
Case Record ◽  
Fixed Field ◽  
Fixed Length

The technique, scope and limitations of a fixed field/fixed length case record utilising the IBM 1232 system is described. The principal problems lie with personnel rather than machinery and with programmes for analysis rather than clinical data.

Sign in / Sign up

Export Citation Format

Share Document