Customer Support: +1 416-401-8730

Login to i2i Subscription Intertek.com
  • There are no items in your cart
Please enter a keyword to search
Advanced search
Home
BSI
BS ISO/IEC 11558:1992

BS ISO/IEC 11558:1992

Current

Current

The latest, up-to-date edition.

Information technology. Data compression for information interchange. Adaptive coding with embedded dictionary. DCLZ Algorithm

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

12-15-1992

Publisher

British Standards Institution

1. Scope
2. Conformance
3. Normative references
4. Definitions
4.1 Code Value
4.2 Codeword
4.3 compression ratio
4.4 dictionary
4.5 empty state
4.6 frozen state
5. Conventions and notations
6. Algorithm identifier
7. DCLZ compression algorithm
7.1 Overview
7.2 Principle of operation
7.2.1 Compilation of the dictionary
7.2.2 Frozen dictionary
7.2.3 Resetting the dictionary to the empty state
7.2.4 Boundaries
7.2.5 Re-creation of the dictionary
7.3 Code Values
7.3.1 Control Codes
7.3.2 Encoded Bytes
7.3.3 Dictionary Codes
7.4 Codewords
Annexes
A. Example of a generic DCLZ algorithm
B. Example of Code Values output for a given input
      stream
C. Bibliography

Specifies a lossless compression algorithm, DCLZ (Data Compression according to Lempel and Ziv), to reduce the number of bits required to represent information coded by using 8-bit bytes. Specifies neither the strategy for freezing the dictionary nor that for resetting it, because these are implementation-dependent. Coverage includes: definitions, conventions and notations, and algorithm identifier. Also includes annexes.

This International Standard specifies a lossless compression algorithm to reduce the number of bits required to represent information coded by means of 8-bit bytes. This algorithm is known as DCLZ (Data Compression according to Lempel and Ziv).

This International Standard specifies neither the strategy for resetting the dictionary nor that for freezing it, as these are implementation-dependent.

This algorithm is particularly useful when information has to be recorded on an inter-changeable medium. Its use is not limited to this application.

Committee
ICT/1
DevelopmentNote
Supersedes 91/65414 DC. (08/2005)
DocumentType
Standard
Pages
16
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO/IEC 11558:1992 Identical

ISO/IEC 11576:1994 Information technology Procedure for the registration of algorithms for the lossless compression of data

View more information
US$166.30
Excluding Tax where applicable
USD
CAD
CHF
CNY
DKK
EUR
GBP
HKD
IDR
INR
JPY
KRW
MXN
NOK
NZD
SEK
SGD
USD
ZAR
Hardcopy - English
PDF - English
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

Access your standards online with a subscription

Features

  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.

Learn more on subscription solutions

or

Get in touch with us