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Servando Espejo-Meana

dblp:81/405 · also Servando Espejo · DBLP profile ↗
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11ranked-venue papers
2as first author
0since 2021 · last 2007
0000-0003-2609-2663ORCID · verified

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 5Systems, architecture and hardware · 5 · 2 first-authorSoftware engineering, systems software and programming languages · 1Graphics, computer vision, multimedia, augmented reality and games · 1

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Computer architecture, parallel and distributed computing, and storage systems
2 papers
Integrated circuit design · 62% Hardware accelerators and domain-specific architectures · 38%
Computer graphics and multimedia
1 paper
Image and video processing · 100%

Topics — the 3 heaviest of 4, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Integrated circuit design
analog and mixed-signal circuits
0.122002
Retinal Processing Emulation in a Programmable 2-Layer Analog Array Processor CMOS Chip · NIPS 2002
An 0.5-µm CMOS Analog Random Access Memory Chip for TeraOPS Speed Multimedia Video Processing · IEEE Trans. Multim. 1999
Integrated circuit design › digital circuit design
CMOS circuit design
0.012002
Retinal Processing Emulation in a Programmable 2-Layer Analog Array Processor CMOS Chip · NIPS 2002
Image and video processing
real-time image processing
0.011999
An 0.5-µm CMOS Analog Random Access Memory Chip for TeraOPS Speed Multimedia Video Processing · IEEE Trans. Multim. 1999

Methods — techniques the papers use, named apart from their topics

bottom-plate sampling · 0.0retinal processing model · 0.0analog VLSI · 0.0
YearPublicationVenuePosition
2007 Data Matrix Code Recognition Using the Eye-RIS Vision System
abstract
This demo illustrates the processing capabilities of the Eye-RIS vision systems; specifically using the Eye-RIS v1.2. These systems employ an AnaFocus's a proprietary architecture where processing is realized in two steps. The first stage of the architecture embeds sensors, parallel processing analog and mixed-signal circuitry, control circuitry and memory. This front-stage is implemented through dedicated bio-inspired chips. The second stage of the Eye-RIS vision system architecture is a digital microprocessor. The combination of parallel preprocessing and serial post-processing makes the Eye-RIS systems very efficient particularly the Eye-RIS systems are capable to close the sensor-processing-actuation loop at a high speed. In this demo, the Eye-RIS v1.2 is used to recognize data matrix codes at more than 200 codes/sec rate.
Amanda Jimenez-Marrufo, Ainhoa Mendizabal, Sergio Morillas-Castillo, Rafael Domínguez-Castro, Servando Espejo-Meana, Rafael Romay-Juarez, Ángel Rodríguez-Vázquez
ISCAS5
2003 CMOS Realization of a 2-Layer CNN Universal Machine Chip
abstract
Some features of the biological retina can be modelled by a 2-layer cellular neural network (CNN) composed of locally connected elementary nonlinear processors. In order to explore these complex spatiotemporal dynamics for image processing, a prototype chip has been designed and fabricated in a 0.5 microm CMOS technology. Design challenges, trade-offs, the building blocks and the tests results for this system with 0.5 x 10(6) transistors, most of them operating in analog mode, are presented in this paper.
Ricardo Carmona-Galán, Francisco Jiménez-Garrido, Rafael Domínguez-Castro, Servando Espejo-Meana, Ángel Rodríguez-Vázquez
Int. J. Neural Syst.4
2003 ACE16k: A 128x128 Focal Plane Analog Processor with Digital I/O
abstract
This paper presents a new generation 128x128 Focal-Plane Analog Programmable Array Processor -FPAPAP, from a system level perspective. It has been manufactured in a 0.35 microm standard digital 1P-5M CMOS technology. It has been designed to achieve the high-speed and moderate-accuracy -8b- requirements of most real time -early-vision applications. External data interchange and control are completely digital. The chip contains close to four million transistors, 90% of them working in analog mode. It achieves peak computing values of 0.33TeraOPS while keeping power consumption at reasonable limits -82.5GOPS/W. Preliminary experimental results are also provided in the paper.
Gustavo Liñán Cembrano, Ángel Rodríguez-Vázquez, Servando Espejo-Meana, Rafael Domínguez-Castro
Int. J. Neural Syst.3
2003 A bio-inspired two-layer mixed-signal flexible programmable chip for early vision
abstract
A bio-inspired model for an analog programmable array processor (APAP), based on studies on the vertebrate retina, has permitted the realization of complex programmable spatio-temporal dynamics in VLSI. This model mimics the way in which images are processed in the visual pathway, what renders a feasible alternative for the implementation of early vision tasks in standard technologies. A prototype chip has been designed and fabricated in 0.5 /spl mu/m CMOS. It renders a computing power per silicon area and power consumption that is amongst the highest reported for a single chip. The details of the bio-inspired network model, the analog building block design challenges and trade-offs and some functional tests results are presented in this paper.
Ricardo Carmona-Galán, Francisco Jiménez-Garrido, Rafael Domínguez-Castro, Servando Espejo-Meana, Tamás Roska, Csaba Rekeczky, István Petrás, Ángel Rodríguez-Vázquez
IEEE Trans. Neural Networks4
2002 Bio-Inspired Analog VLSI Design Realizes Programmable Complex Spatio-Temporal Dynamics on a Single Chip
abstract
A bio-inspired model for an analog parallel array processor (APAP), based on studies on the vertebrate retina, permits the realization of complex spatio-temporal dynamics in VLSI. This model mimics the way in which images are processed in the visual pathway what renders a feasible alternative for the implementation of early vision tasks in standard technologies. A prototype chip has been designed in 0.5 /spl mu/m CMOS. Design challenges, trade-offs and the building blocks of such a high-complexity system (0.5/spl times/10/sup 6/ transistors, most of them operating in analog mode) are presented in this paper.
Ricardo Carmona-Galán, Francisco Jiménez-Garrido, Rafael Domínguez-Castro, Servando Espejo-Meana, Ángel Rodríguez-Vázquez
DATE4
2002 Retinal Processing Emulation in a Programmable 2-Layer Analog Array Processor CMOS Chip
abstract
A bio-inspired model for an analog programmable array processor (APAP), based on studies on the vertebrate retina, has permitted the realization of complex programmable spatio-temporal dynam- ics in VLSI. This model mimics the way in which images are pro- cessed in the visual pathway, rendering a feasible alternative for the implementation of early vision applications in standard tech- nologies. A prototype chip has been designed and fabricated in a 0.5(cid:22)m standard CMOS process. Computing power per area and power consumption is amongst the highest reported for a single chip. Design challenges, trade-o(cid:11)s and some experimental results are presented in this paper.
Ricardo Carmona-Galán, Francisco Jiménez-Garrido, Rafael Domínguez-Castro, Servando Espejo-Meana, Ángel Rodríguez-Vázquez
NIPS4
2001 CMOS design of focal plane programmable array processors
Ángel Rodríguez-Vázquez, Servando Espejo-Meana, Rafael Domínguez-Castro, Ricardo Carmona-Galán, Gustavo Liñán Cembrano
ESANN2
2000 Implementation of non-linear templates using a decomposition technique by a 0.5 μm CMOS CNN universal chip
abstract
This paper demonstrates the processing capabilities of a recently designed analog programmable array processor. This new prototype, called CNNUC3, follows the cellular neural network universal machine computing paradigm. Due to its very advanced features and algorithmic capabilities, this chip has been demonstrated to be able to perform not only linear templates executions, but also to be very adequate for the implementation of non-linear templates by using a decomposition method. This paper focus on the application examples of the execution of non-linear templates with the CNNUC3 prototype. A brief description of the theoretical background is also presented in the paper.
Gustavo Liñán Cembrano, Péter Földesy, A. Rodrignez-Vazquez, Servando Espejo-Meana, Rafael Domínguez-Castro
ISCAS4
1999 An 0.5-µm CMOS Analog Random Access Memory Chip for TeraOPS Speed Multimedia Video Processing
abstract
Data compressing, data coding, and communications in object-oriented multimedia applications like telepresence, computer-aided medical diagnosis, or telesurgery require an enormous computing power-in the order of trillions of operations per second (TeraOPS). Compared with conventional digital technology, cellular neural/nonlinear network (CNN)-based computing is capable of realizing these TeraOPS-range image processing tasks in a cost-effective implementation. To exploit the computing power of the CNN Universal Machine (CNN-UM), the CNN chipset architecture has been developed-a mixed-signal hardware platform for CNN-based image processing. One of the nonstandard components of the chipset is the cache memory of the analog array processor, the analog random access memory (ARAM). This paper reports on an ARAM chip that has been designed and fabricated in a 0.5-/spl mu/m CMOS technology. This chip consists of a fully addressable array of 32/spl times/256 analog memory registers and has a packing density of 637 analog-memory-cells/mm/sup 2/. Random and nondestructive access of the memory contents is available. Bottom-plate sampling techniques have been employed to eliminate harmonic distortion introduced by signal-dependent feedthrough. Signal coupling and interaction have been minimized by proper layout measures, including the use of protection rings and separate power supplies for the analog and the digital circuitry. This prototype features an equivalent resolution of up to 7 bits-measured by comparing the reconstructed waveform with the original input signal. Measured access times for writing/reading to/from the memory registers are of 200 ns. I/O rates via the l6-line-wide I/O bus exceed 10 Msamples/s. Storage time at room temperature is in the 80 to 100 ms range, without accuracy loss.
Ricardo Carmona-Galán, Ángel Rodríguez-Vázquez, Servando Espejo-Meana, Rafael Domínguez-Castro, Tamás Roska, Tibor Kozek, Leon O. Chua
IEEE Trans. Multim.3
1995 Realization of a CNN Universal Chip in CMOS Technolgy
abstract
This paper describes the design of a programmable Cellular Neural Network (CNN) chip, with additional functionalities similar to those of the CNN Universal Chip. The prototype, which contains 1024 cells, has been designed in a 1.0 /spl mu/m, n-well CMOS technology. A careful selection of the topology and design parameters has resulted in a cell density of 31 cells/mm/sup 2/ and an accuracy in the weight values in the range of 7-8 bits. Adaptive techniques have been employed to ensure accurate external control and system robustness against process-parameter variations.
Servando Espejo-Meana, Rafael Domínguez-Castro, Ángel Rodríguez-Vázquez
ISCAS1
1993 A Model for VLSI Implementation of CNN Image Processing Chips Using Current-mode Techniques
Servando Espejo-Meana, Ángel Rodríguez-Vázquez, Rafael Domínguez-Castro, Bernabé Linares-Barranco, José Luis Huertas
ISCAS1