JPEG Initiates Standardization of Low-latency Lightweight Coding System - JPEG XS
JPEG XS — Today’s industrial applications often imply transport and storage of uncompressed images and video. This is for instance the case in video links (SMPTE Serial Digital Interface), IP transport (SMPTE 2022 5/6 & proprietary uncompressed RTPs), Ethernet transport (IEEE/AVB), proprietary transports, memory buffers, and omnidirectional video capture and rendering. In this context, the JPEG Committee has started a new standardization project, JPEG XS, referenced as ISO/IEC 21122, that targets a low-latency lightweight coding system aimed at supporting higher resolutions and frame rates over these channels while assuring high visual quality and keeping power and bandwidth consumption within a reasonable budget. This effort should result in a highly interoperable solution.
A public workshop on JPEG XS was organised at the JPEG meeting in La Jolla on February 23, 2016. The proceedings of this workshop are published on the JPEG website at www.jpeg.org.
The JPEG Committee released a Call for Proposals that invites candidate coding technologies. Interested coding experts and codec providers are encouraged to participate in this standardization activity and submit proposals. The deadline for an expression of interest and submissions of proposals has been set to May 23rd, 2016, as detailed in the Call for Proposals. The call for proposals, as well as the proceedings of the JPEG XS workshop, organized during the 71st WG1 meeting in La Jolla (US), are publicly available on the committee website.
JPEG XT — ISO/IEC 18477-6 and ISO/IEC 18477-7, JPEG XT parts 6 and 7 have been published as international standards. Part 6 of JPEG XT allows to extend the bitdepths of JPEG images from 9 to 16 bits, modernizing the well-known JPEG format to satisfy the needs of the 21st century.
JPEG XT part 7 allows to extend the dynamic range of images even further by allowing floating point samples; a typical application for JPEG XT part 7 is high-dynamic range photography. JPEG XT part 7 improves the compression factor over existing solutions by a factor of three to four without any visible loss of image quality.
As for all of JPEG XT, parts 6 and 7 ensure compatibility to existing JPEG applications, all JPEG XT images - regardless of their dynamic range - can be decoded and viewed by any JPEG decoder. Reference implementations for JPEG XT are ready for download in source code form at www.jpeg.org.
Two additional parts - for lossless image compression and coding of alpha channels - are currently under preparation by the ISO committee and are expected to be available as international standards in July 2016.
JPEG Privacy & Security — A second public workshop on JPEG Privacy & Security was organised at the JPEG meeting in La Jolla on February 23, 2016. The proceedings of this workshop are published on the JPEG website at www.jpeg.org. The JPEG committee continues investigating solutions that will empower end-users to protect their privacy when sharing JPEG files or to allow professional and cultural heritage archives to signal for example ownership rights. JPEG will kick-off the standardization process for JPEG Privacy & Security later this year.
"Enabling seamless interoperability for exchange of image data within and across applications has been the main objective of JPEG committee. JPEG XS breaks new grounds in this direction by providing a large number of existing and emerging imaging application, efficient and interoperable solutions in environments where lightweight and low-latency are among top requirements." said Prof.Touradj Ebrahimi, the Convener of the JPEG committee.
The Joint Photographic Experts Group (JPEG) is a Working Group of ISO/IEC, the International Organisation for Standardization / International Electrotechnical Commission, (ISO/IEC JTC 1/SC 29/WG 1) and of the International Telecommunication Union (ITU-T SG16), responsible for the popular JBIG, JPEG, JPEG 2000, JPEG XR, JPSearch and more recently, the JPEG XT, JPEG XS and JPEG Systems families of imaging standards.
The WG1 group meets nominally three times a year, in Europe, North America and Asia. The latest 71st meeting was held on February 22-26, 2016 in La Jolla, CA, USA and was hosted by INCITS L3. The next (72nd) WG 1 Meeting will be held on May 30-June 3, 2016, in Geneva, Switzerland.
More information about JPEG and its work is available at www.jpeg.org or by contacting Peter Schelkens and Fumitaka Ono of the JPEG PR subgroup at .
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