Searching for authors named "Alfred Mertins" – sorted by Relevance.

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29 documents found, showing 1 through 10. Next 10 →

Crosstalk Cancellation and Memory Truncation in Transmultiplexer Filter Banks - Transmission over Non-Ideal Channels
by Alfred Mertins — 1996
…When transmultiplexers with overlapping frequency bands are used for the transmission of data over non-ideal channels, intersymbol interference and crosstalk between different data channels will arise. This paper addresses the design of optimal linear networks that reduce the effects mentioned above…
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Image compression via edge-based wavelet transform
by Alfred Mertins, Alfred Mertins — 1999 — Optical Engineering
…In this paper, an edge-based wavelet transform is proposed for image compression. In the encoder, first the dominant edges of an image are detected and coded as side information. Then, the wavelet transform (WT) is carried out in such a way that no filtering over previously detected edges is perform…
Cited by 4 (0 self) – Add To MetaCart

Time-Varying And Support Preservative Filter Banks: Design Of Optimal Transition And Boundary Filters Via Svd
by Alfred Mertins — 1995 — in Proc. IEEE Int. Conf. Acoust., Speech, Signal Processing
…In this paper, methods for switching filter coefficients and filter bank structures and methods for processing finite length signals will be studied. The problem of designing optimal boundary and transition filters will be solved directly via singular value decomposition (SVD) while the optimality c…
Cited by 5 (4 self) – Add To MetaCart

Optimized Biorthogonal Shape Adaptive Wavelets
by Alfred Mertins — 1998 — in Proc. ICIP’98
…This paper presents shape adaptive wavelet transforms for object-based image coding. Methods for recovering moment properties that are valid for the original filters and wavelets, but that get lost in the boundary regions of shape adaptive transforms, are presented. Furthermore, methods for equalizi…
Cited by 8 (2 self) – Add To MetaCart

OBJECT-BASED IMAGE COMPRESSION WITH SIMULTANEOUS SPATIAL AND SNR SCALABILITY SUPPORT FOR MULTICASTING OVER HETEROGENEOUS NETWORKS
by Habibollah Danyali, Alfred Mertins
…This paper proposes an image compression algorithm for texture coding of arbitrarily shaped image objects which supports spatial and SNR scalability features simultaneously. The proposed algorithm, is based on the Set Partitioning in Hierarchical Trees (SPIHT) algorithm and called Fully Scalable Obj…
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Biorthogonal cosine-modulated filter banks without DC leakage
by Tanja Karp, Alfred Mertins — 1998 — Signal Processing
…In this paper, we present a structure for implementing the polyphase filters of biorthogonal modulated filter banks that automatically guarantees perfect reconstruction of the filter bank and furthermore allows to specifiy the values of the filters ’ frequency responses at certain frequencies. Thus,…
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Audio Subband Coding With Improved Representation Of Transient Signal Segments
by Jörg Kliewer, Alfred Mertins — 1998 — Proc. of Europ. Signal Processing Conf. (EUSIPCO 98
…In this paper, we present a subband audio coding scheme with an attack-sensitive framing of the input audio signal, where the frame boundaries closely match both ends of the transient. Since each transient frame is processed as a symmetrically extended nite-length signal with a supportpreservative M…
Cited by 6 (0 self) – Add To MetaCart

Integer-Modulated Filter Banks Providing Perfect Reconstruction
by Alfred Mertins, Tanja Karp — 2000 — in Proc. EUSIPCO
…In this paper, we extend the perfect reconstruction conditions known for cosine modulation to other, more general modulation schemes. The modified PR conditions provide additional degrees of freedom which can be utilized to design integermodulated filter banks. Techniques for the design of prototype…
Cited by 1 (1 self) – Add To MetaCart

Lifting Schemes For Biorthogonal Modulated Filter Banks
by Tanja Karp, Alfred Mertins — 1997 — In Proc. International Conference on Digital Signal Processing
…In this paper we connect the design of biorthogonal modulated filter banks with the idea of lifting schemes, which were proposed for the construction of biorthogonal wavelets. Based on this formulation, we derive a lattice-like structure for the polyphase components. As the rotationbased structures …
Cited by 5 (4 self) – Add To MetaCart

Coding Of Digital Video With The Edge-Sensitive Discrete Wavelet Transform
by Kalman Cinkler, Alfred Mertins
…In Proc. of IEEE International Conference on Image Processing ICIP'96 Lausanne, Switzerland, September 1996 this paper we present an image sequence coding scheme for very low bit rate coding which is based on spatial redundancy reduction via the new edge sensitive subband coding method and temporal…
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