The theory of digital filter banks for subband coding is well developed. The purpose of this paper is to develop an analogous framework for the multiresolution analysis of sequences of elements belonging to a finite f...
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The theory of digital filter banks for subband coding is well developed. The purpose of this paper is to develop an analogous framework for the multiresolution analysis of sequences of elements belonging to a finite field. The discussion starts with analysis of decimation and interpolation over finite fields. N-band digital filters are defined over finite fields. Then filter banks are studied. A design theory of orthogonal and biorthogonal filter banks is advanced and examples are given.
In 1992, the United States advanced Television Systems Committee voted a Ghost Cancellation Reference (GCR) signal as a U.S. standard. This GCR signal belongs to a new class of high energy signals, described below. Th...
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ISBN:
(纸本)0780308433
In 1992, the United States advanced Television Systems Committee voted a Ghost Cancellation Reference (GCR) signal as a U.S. standard. This GCR signal belongs to a new class of high energy signals, described below. This paper will concisely analyze the signal, and discuss its properties and its processing. Some effective algorithms and applications in echo/ghost cancellation will also be described.
Proceedings incorporates 164 papers. These are arranged according to the following major topics: sonar beamforming;VLSI architectures;VLSI algorithms and arithmetic;design methodology and image processing;directions i...
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ISBN:
(纸本)0780309464
Proceedings incorporates 164 papers. These are arranged according to the following major topics: sonar beamforming;VLSI architectures;VLSI algorithms and arithmetic;design methodology and image processing;directions in VLSI signalprocessing;signalprocessing techniques in neural networks;neural networks in speech applications;theory and algorithms in neural networks;neural networks in visual applications;spectral quantization for speech coding;language modeling;speech recognition in noise;spoken language systems;speech coding at rates below 4 KB/S;speech synthesis;speech recognition in neural networks;search and modeling techniques;enhancement of noisy speech;speaker and language identification;word spotting;speech analysis and synthesis;adaptive modeling;medium rate speech coding;feature representation for recognition;speech processing education;role of signalprocessing in advanced manufacturing;biomedical signalprocessing;digital video;hearing and aids for handicapped;room acoustics, echo cancellation, rransducer arrays and active noise control;broadband audio coding and music signalprocessing;direction and signal parameter estimation;as well as source localization.
This conference proceedings contains 154 papers on the design and fabrication of custom integrated circuits. Topics discussed include programmable logic design automation and applications, microprocessors and neural n...
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ISBN:
(纸本)0780308263
This conference proceedings contains 154 papers on the design and fabrication of custom integrated circuits. Topics discussed include programmable logic design automation and applications, microprocessors and neural networks, advanced digital synthesis, integrated analog filters, programmable logic device architectures, macromodeling and simulation of CMOS digital circuits, performance-driven physical design automation, hard disk drive electronics, VLSI for video media, high performance circuits and graphics processors, design automation for analog and mixed-signal integrated circuits, analog modeling and simulation, digital filter and special-purpose digital signalprocessing circuits, advanced communication LSIs, automatic layout generation and analysis, asymptotic waveform evaluation and simulation algorithms, advances in gate arrays, integrated circuit fabrication technology, memory and special logic chips, high-precision timing circuits, analog to digital data converters, optical and electrical interconnect and interface circuits, and CMOS logic circuit reliability.
This paper describes a real-time controller architecture being implemented within the advanced Teleoperation Laboratory at the California Institute of Technology's Jet Propulsion Laboratory. We address system perf...
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ISBN:
(纸本)0819413224
This paper describes a real-time controller architecture being implemented within the advanced Teleoperation Laboratory at the California Institute of Technology's Jet Propulsion Laboratory. We address system performance/integration trade-off issues with respect to the system's computational needs and the present day technology, while considering a variety of specification goals in addition to performance, e.g., the flexibility to enable fast prototyping of new real-time control algorithms and control/sensor interfaces.
The requirements and taxonomy of still image conversion problems for advanced multimedia applications are indicated. Sophisticated signalprocessingalgorithms are studied for some static image format conversion probl...
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The requirements and taxonomy of still image conversion problems for advanced multimedia applications are indicated. Sophisticated signalprocessingalgorithms are studied for some static image format conversion problems without motion dependence. The main quality problems in this area are identified, and improved algorithms are proposed. These algorithms are designed from the perceptual point of view to eliminate blurring, flickering, and information loss in operations such as zooming, aspect ratio change, and progressive-to-interlace conversion. Test results confirm the improved performance of these algorithms compared with the existing methods.< >
Image processing often involves operations using `neighbor' pixels. This paper combines the usual definition of 4 or 8 connected neighbors with image information to produce local neighbor definitions that are sign...
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ISBN:
(纸本)0819413259
Image processing often involves operations using `neighbor' pixels. This paper combines the usual definition of 4 or 8 connected neighbors with image information to produce local neighbor definitions that are signal dependent. These generalized neighbors, G-neighbors, can be used for a variety of image processing tasks. The paper examines their use for detail preserving smoothing and morphology. The simple/local nature of G-neighbor definitions make them ideal for implementation on low-level pixel parallel hardware. A near real-time parallel implementation of the G-neighbor computation, including G-neighbor-based detail preserving smoothing and G-neighbor morphology, is discussed. The paper also provides a qualitative comparison of G-neighbor-based algorithms to previous work.
As broadband integrated networks such as B-ISDN/ATM are coming closer to reality, and as more advanced variable rate source coding algorithms are being developed, the accommodation of variable bit rate (VBR) sources, ...
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ISBN:
(纸本)0818635800
As broadband integrated networks such as B-ISDN/ATM are coming closer to reality, and as more advanced variable rate source coding algorithms are being developed, the accommodation of variable bit rate (VBR) sources, such as VBR coded video, together with the existing constant bit rate (CBR) sources is becoming a necessity. Due to the bursty nature and the low delay and low loss requirements of VBR video, statistical multiplexing with loss and delay priorities is needed so that VBR video and CBR traffic can be jointly accommodated. This paper analyzes a threshold priority access statistical multiplexing technique with a Markov modulated fluid source model for VBR video traffic, and an exact CBR model. Exact expressions for loss probabilities and delay are obtained. Based on these quality of service parameters, buffer size requirements of the statistical multiplexer are obtained, and the performance of a fixed threshold algorithm is compared with that of a rate-based threshold algorithm. The results provide the tradeoffs between buffer size and processing complexity for control. The exact analytical results can be used to calculate buffer size requirements.
The author proposes a novel phase sensitive detector with a programmable sensitivity and phase detection range for signalprocessing/detection in the phase domain. To generate a phase discrimination response with a sp...
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The author proposes a novel phase sensitive detector with a programmable sensitivity and phase detection range for signalprocessing/detection in the phase domain. To generate a phase discrimination response with a specified sensitivity and detection range, a mathematical procedure is developed to represent the response in terms of a truncated trigonometric power-series of cos theta and sin theta with theta being the phase deviation of an input modulated signal. Based on mathematical results, an algorithm is developed to synthesize the detector by electronically mechanizing each power-series term using an analog multiplication, programmable coefficient scaling, and transversal summing. Employing the algorithm, the idea of a wide range linear quasi 2 pi -radian phase detector for a M-ary phase shift keying (PSK)/quadrature amplitude modulation (QAM) and phase locked loop (PLL) system application is presented. Detector performance in the presence of additive noise has been investigated to show that an input signal-to-noise power ratio higher than 10 dB will assure satisfactory system operation.< >
The development of a real-time advanced dynamic robot arm controller which is cost-effective, compact and flexible is described for a six joint arm. It utilizes IBM PC-AT as a host computer and was configurated with u...
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The development of a real-time advanced dynamic robot arm controller which is cost-effective, compact and flexible is described for a six joint arm. It utilizes IBM PC-AT as a host computer and was configurated with up to seven digital signal processors. First, the controller interprets high-level control commands from the IBM PC-AT and performs a robot arm control computation based on the Newton-Euler equations which are known to be the most efficient algorithm for multiprocessor systems. Implementation of a parallel algorithm of the dynamic control law based on Newton-Euler formulation is proposed on the PARADISE multiprocessor system. The design of hardware and software for the controller is discussed in more detail.< >
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