MIME Type Registrations for JPEG 2000 (ISO/IEC 15444)
RFC 3745

Document Type RFC - Proposed Standard (April 2004; No errata)
Was draft-singer-jp2 (individual in tsv area)
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Network Working Group                                          D. Singer
Request for Comments: 3745                                Apple Computer
Category: Standards Track                                       R. Clark
                                                             Elysium Ltd
                                                                  D. Lee
                                                              Yahoo Inc.
                                                              April 2004

         MIME Type Registrations for JPEG 2000 (ISO/IEC 15444)

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2004).  All Rights Reserved.

Abstract

   This document serves to register and document the standard MIME types
   associated with the ISO/IEC 15444 standards, commonly known as JPEG
   2000 (Joint Photographic Experts Group).

1.  Introduction

   This document describes the registration of the MIME [MIME1] sub-
   types image/jp2, video/mj2, image/jpx, and image/jpm.  The image
   encoding is defined by [ISO-JPEG2000-1].

   The still image file format to which this document refers is defined
   in Annex I of [ISO-JPEG2000-1].  Note that a file format is optional
   in [ISO-JPEG2000-1], but mandatory for the MIME sub-type.  This
   document is not related to the definition of the MIME sub-type
   image/jpeg, which is partly defined by [ISO-JPEG-1], and partly by
   the file format specification defined in [JFIF].

   JPEG 2000 is a new standard, intended to create a image coding system
   for many types of still images (bi-level, gray-level, color, multi-
   component) with different characteristics (natural images,
   scientific, medical, remote sensing, imagery, text, rendered
   graphics, etc.) allowing different imaging models (client/server,
   real-time transmission, image library archival, limited buffer and

Singer, et al.              Standards Track                     [Page 1]
RFC 3745         MIME Type Registrations for JPEG 2000        April 2004

   bandwidth resources, etc.) within a unified system.  This coding
   system is intended to provide low bit-rate operation with rate-
   distortion and subjective image quality performance superior to
   existing standards, without sacrificing performance at other points
   in the rate-distortion spectrum.

   This standard is intended to serve still image compression needs that
   are currently not served by the current JPEG standards [ISO-JPEG-1],
   [ISO-JPEG-2], [ISO-JPEG-3], and [ISO-JPEG-4], and is intended to
   compliment, not replace, the current JPEG standards.  JPEG 2000 is a
   modern wavelet-based codec that is expected to be widely used for
   still images.  Its use for motion sequences is expected to be similar
   to JPEG:  in those environments where only a single codec is
   required, and JPEG 2000 is available (e.g., digital still cameras
   recording short motion sequences) or where frame-by-frame coding is
   desired (no inter-frame coding).

   There is a standard file format for Motion JPEG 2000 sequences.  This
   file format permits the carriage of audio in addition to the video.
   The format is derived from the ISO Base Media File Format as defined
   in [ISO-JPEG2000-12].  The visual coder in a Motion JPEG 2000 file is
   JPEG 2000.  The Motion JPEG 2000 standard is specified in [ISO-
   JPEG2000-3].  The ISO Base Media File Format is jointly maintained by
   the ISO/IEC JPEG and MPEG committees.  The MP4 format is also derived
   from the ISO Base Media File Format.

   Therefore, to identify this restricted usage, a new mime type is
   desirable.

   This file type is intended always to contain a video sequence, though
   simple audio is permitted in addition to the video.  Therefore it
   falls correctly under the "video" branch of mime types.

   Also within WG1 of ISO there is an effort underway to define a
   standard file format for Compound Images.  This file format
   optionally supports other coding systems, in addition to JPEG 2000,
   as needed.

2.  JPEG 2000 Definition

   JPEG 2000 is defined in detail in [ISO-JPEG2000-1].  The
   documentation can be obtained from any national standards body or
   from ISO at http://www.iso.ch.

   Information as to its latest status, and downloads of the initial
   documents and some supporting documentation are available through the
   JPEG committee's official Web site at http://www.jpeg.org.

Singer, et al.              Standards Track                     [Page 2]
RFC 3745         MIME Type Registrations for JPEG 2000        April 2004

   While a brief scope and feature description is provided in this
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