Philips Electronics

1
JPEG 2000 Overview

• Detlef Götting
• Philips Semiconductors
• Systems Lab Hamburg

2
JPEG2000 - Introduction

• ISO/IEC JTC 1 / SC 29 / WG 1
• ISO 15444 - 1 Baseline coreISO 15444 - 2
  ExtensionsISO 15444 - 3 Motion-JPEG2000 ?

3
JPEG2000 - Status Part 1

• Current WD Document N1457
• Dezember 1999 CD
• November 2000 DIS
• March 2001 IS

4
JPEG2000 - Status Part II

• Current Pre-WD
• March 2000 WD
• July 2000 CD
• March 2001 DIS
• July 2001 IS

5
ISO 15444 - 1

• JPEG2000 is based on 16 Bit markers and variable
  length data segments.
• The arithmetic entropy coding used iscompliant
  to the MQ Codec from JBIG-2

6
ISO 15444 - 1

• The wavelet coefficients are arranged into
  rectangular code blocks within each subband.
• These code blocks are then coded bit-plane wise
  (MSBP to LSBP) into three passes (significance,
  refinement and clean up).

7
ISO 15444 - 1

• An image can be split into non-overlapped
  tiles.Each tile/image is decomposed into Malat
  compliant sub-bands.
• The stream supports progressive by quality,
  progressive by resolution and progressive by
  arbitrary styles.

8
ISO 15444 - 1

• The baseline core makes use of a scalar
  quantizer. In the extension it is possible to use
  also a trellis-based quantizer.
• The transformation of the image/tile data is done
  by block or line based FDWT/IDWTs.

9
ISO 15444 - 1

• The supported region of interest coding is
  compliant to the scaling based method MAXSHIFT.
• This allows arbitrary shaped ROIs ( Part I
  rectangular / Part II any shape ) without shape
  information.

10
ISO 15444 - 1

• The standard allows multiple components.
• The standard supports error resilience.
• A ISO 15444 compliant file is identified by the
  extension .JP2