Schlüsselwörter
(Englisch)
|
JPEG2000 coding system; multiplierless implementations; optimized memory block; EBCOT; EBCOT Tier-1; low-complexity low-power architectures; image content scrambling; video surveillance
|
Forschungsprogramme
(Englisch)
|
COST-Action 276 - Information and knowledge management for integrated media communication systems
|
Kurzbeschreibung
(Englisch)
|
The project aims at studying very low-power implementation techniques for the JPEG 2000 toolbox, in view of producing results optimally suitable for wireless applications, and specifically to the 3rd and 4th Generation (3G / 4G) wideband CDMA (W-CDMA) application. The central objective is to elaborate an innovative paradigm in very low-power high-quality image/video compression design, relying on a perceptual image/video quality metric expressed in function of power consumption over a space of operational parameters, rendering the user-oriented image/video coding for personalized wireless multimedia services possible.
|
Weitere Hinweise und Angaben
(Englisch)
|
Full name of research-institution/enterprise: Université de Neuchâtel Institut de Microtechnique Chaire d'Electronique et de Traitement du signal
|
Partner und Internationale Organisationen
(Englisch)
|
A, BG, HR, CY, CZ, F,, GR, H, IRL, I, N, RO, SK, SI, E, CH, TR, YU, MK
|
Abstract
(Englisch)
|
The starting and largely expected arrival on the market of wireless systems featuring full multimedia capabilities has added the low-power constraint within the design of image/video compression systems at both algorithmic and circuit implementation levels, additionally to the need for elaborating solutions for personalized services and dedicated applications. The project addressed the study of still images and video compression by using the ISO / ITU-T standard JPEG2000 algorithm/toolbox by focusing on two major aspects to be solved for wireless applications, considering in particular the 3rd and 4th Generation (3G / 4G) wideband CDMA (W-CDMA) networks, namely proposing efficient solutions for: 1) the low-complexity and very low-power implementation of the JPEG2000 toolbox, and 2) the image content protection within JPEG2000 denoted as 'scrambling', which consists in securely masking parts or entire images in order to hide their content to unauthorized persons, and in integrating these images to a complete system of video surveillance. The first topic, handled at IMT UniNe, led to the twofold design of a fully multiplierless implementation of JPEG2000 and of a highly optimized local memory scheme for the Ebcot tier 1 module. Both contributions favor a drastic reduction in complexity and power consumption of core JPEG2000 operators that combined absorb ca 80% of the basic execution time. The first contribution addressed the intensive multiplication-based modules that regularly use up ca 40% of the total execution time; while the second contribution addressed the intensive bit-resolution data transfers and processing within the Ebcot tier 1 stage, which also use up ca 40% of the total execution time. The second topic, stuedied at Emitall, consisted in developing a flexible image scrambling method for JPEG2000 supporting the scrambling on wavelets and on bitstream domain with control of the scrambling-spreading side effect, that globally satisfies the privacy and real-time requirements of modern video surveillance systems. The image / video encoding complemented by data scrambling protection and seed-encryption occurs within distributed cameras, whereas the real-time decryption, de-scrambling, and image/video decoding is implemented on desktop and Pocket PC computers.
|
Datenbankreferenzen
(Englisch)
|
Swiss Database: COST-DB of the State Secretariat for Education and Research Hallwylstrasse 4 CH-3003 Berne, Switzerland Tel. +41 31 322 74 82 Swiss Project-Number: C03.0004
|
