Research on real-time health systems have received great attention during recent years and the needs of high-quality personal multichannel medical signal compression for personal medical product applications are increasing. The international MPEG-4 audio lossless coding (ALS) standard supports a joint channel-coding scheme for improving compression performance of multichannel signals and it is ...

It is convenient to minimize the space needed to store data. Larger files will take longer to transfer over a data link, and will more quickly fill up disk quotas. Data compression techniques such as those used in common compression utilities allow reducing file sizes by exploiting redundancies in the data contained in them. Lossless coding techniques do this without compromising any informatio...

abstract Compression with Reversible Embedded Wavelets (CREW) is a uniied lossless and lossy continuous-tone still image compression system. It is wavelet-based using a \reversible" approximation of one of the best wavelet lters. Reversible wavelets are linear lters with non-linear rounding which implement exact-reconstruction systems with minimal precision integer arithmetic. Wavelet coeecient...

Ziel des Netzund Systemmanagements ist der effektive und effiziente Betrieb von vernetzten Systemen. Dabei soll die gewünschte Funktionalität des vernetzten Systems mit höchster Qualität bereitgestellt werden. Ein digitales Telekommunikationsnetz als ein Beispiel für ein großes verteiltes System besteht aus einer Vielzahl von Netzknoten, von denen jeder für sich genommen bereits ein komplexes S...

In the paper an effective context based lossless coding technique is presented. Three principal and few auxiliary contexts are defined. The predictor adaptation technique is an improved CoBALP algorithm, denoted CoBALP+. Cumulated predictor error combining 8 bias estimators is calculated. It is shown experimentally that indeed, the new technique is time-effective while it outperforms the well k...

Many state-of-the-art wavelet image coders use nonorthog-onal transforms for both lossy and lossless wavelet image coding 1, 2, 3, 4]. In this paper, a projection prediction is described that capitalizes on the non-orthogonality of wavelet transform basis vectors to improve the prediction of high-frequency coeecients. For lossy wavelet coders, the prediction yields improved context modeling and...

Three extension tools for extending and enhancing the compression performance of prediction-based lossless audio coding are proposed. The first extension aims at supporting floatingpoint data input in addition to integer PCM data. The second is progressive-order prediction of the starting samples at each random-access frame, where the information on previous frame is not available. The third is...

This paper proposes an object-based, highly scalable, lossless coding approach for MRI data. The proposed approach, called OBHS-SPIHT, encodes each slice of the input MRI data set separately in a multiresolution fashion from low resolution to full resolution without losing any information. To achieve more compression efficiency, the algorithm only encodes the main object of interest in the inpu...

Enhanced aacPlus is an audio codec which is composed of advanced audio coding (AAC), spectral band replication (SBR), and parametric stereo (PS) for efficient audio coding at low bit rates. We propose a new coding scheme for lossless bit rate reduction of PS in enhanced aacPlus. We first determine the optimal contexts for context-based coding of quantized stereo parameter indexes in PS. Then we...

In this paper, a nonlinear subband decomposition scheme with perfect reconstruction is proposed for lossless coding of multispectral images. The merit of this new scheme is to exploit efficiently both the spatial and the spectral redundancies contained in a multispectral image sequence. Besides, it is suitable for progressive coding, which constitutes a desirable feature for telebrowsing applic...