ISO/IEC 14495-1:1999 情報技術  —  連続トーン静止画像のロスレスおよびほぼロスレス圧縮：ベースライン  —  パート1： | ページ 2

2.1 同一の推奨事項 |国際規格

Foreword

ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, 3.

In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this part of ISO/IEC 14495 may be the subject of patent rights other than those identified in annex J. ISO and IEC shall not be held responsible for identifying any and all such patent rights.

International Standard ISO/IEC 14495-1 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information, in collaboration with ITU-T. The identical text is published as ITU-T Recommendation T.87.

ISO/IEC 14495 consists of the following parts, under the general title Information technology — Lossless and nearlossless compression of continuous-tone still images:

• Part 1: Baseline
• Part 2: Extensions

Annexes A to E form a normative part of this part of ISO/IEC 14495. Annexes F to J are for information only. Annex J is only applicable to ISO/IEC 14495-1.

1 Scope

This Recommendation | International Standard defines a set of lossless (bit-preserving) and nearly lossless (where the error for each reconstructed sample is bounded by a pre-defined value) compression methods for coding continuoustone, gray-scale, or colour digital still images.

This Recommendation | International Standard

• specifies a process for converting source image data to compressed image data;
• specifies processes for converting compressed image data to reconstructed image data;
• specifies coded representations for compressed image data;
• provides guidance on how to implement these processes in practice.

2 Normative references

The following Recommendations and International Standards contain provisions which, through references in this text, constitute provisions of this Recommendation | International Standard. At the time of publication, the editions indicated were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this Recommendation | International Standard are encouraged to investigate the possibility of applying the most recent edition of the Recommendations and Standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. The Telecommunication Standardization Bureau of the ITU maintains a list of the currently valid ITU-T Recommendations.

2.2 Additional references

Annex I

Bibliography
(This annex does not form an integral part of this Recommendation | International Standard)