Mike Eichhorn | TU Ilmenau (original) (raw)

Papers by Mike Eichhorn

Embedded information technology (IT) is the dominating enabler for advanced driver assistance sys... more Embedded information technology (IT) is the dominating enabler for advanced driver assistance systems and for the continued introduction of innovations in automotive products. Today’s Car-IT architecture is characterized by a large number of dedicated function electronic control units (ECUs) with relatively low-performance microcontrollers and a heterogeneous set of low-capacity, automotive-specific communication buses. Over the past decades, the approach to add one ECU per new function has led to a complex, difficult to maintain and costly Car-IT infrastructure (Fig. 14.1).

2010 IEEE International Conference on Image Processing, 2010

2008 IEEE International Conference on Vehicular Electronics and Safety, 2008

ABSTRACT Rising communication needs in transportation systems due to meshed control circuits and ... more ABSTRACT Rising communication needs in transportation systems due to meshed control circuits and complex sensor technology like lidar, radar and cameras lead to increasing wiring harness and system complexity. To solve this, we made an approach for a unified car-IT communication-architecture based on IEEE 802.3 switched Ethernet for use in the vehicular environment. In this paper, we present the requirements for and realization of the core-network components to enable deterministic communication and the corresponding real-time calculus for system verification.

Conference on Lasers and Electro-Optics 2012, 2012

We define the finite Q-factor of a continuous-wave lasing resonator as the energy of coherent pho... more We define the finite Q-factor of a continuous-wave lasing resonator as the energy of coherent photons stored in the resonator at a given time over the energy of these coherent photons lost per oscillation cycle.

2008 IEEE International Conference on Vehicular Electronics and Safety, 2008

In this paper we propose a novel in-car realtime streaming multimedia architecture. This architec... more In this paper we propose a novel in-car realtime streaming multimedia architecture. This architecture is based on the Ethernet protocol combined with a single audio/video compression format that is valid throughout the car. Audio/video content deviating from the in-car format is transcoded by a central transcoding unit for delivery in the car. In this context, we compare three different transcoding approaches which differ in their design and performance. In the first scheme a cascaded transcoding unit consisting of a full decoder and a full encoder is studied. In the second approach, the transcoder reuses the motion information extracted from the incoming video stream. The motion information is either adopted without modification or serves for the initialization of a low-complexity motion search process in the encoder. The third transcoder investigated in this work reuses both motion information as well as the encoded residual data (DCT coefficients). All three trancoders have been implemented in an in-car communication prototype. We investigate the performance of the three transcoders by means of their complexity and their rate-distortion (RD) performance. From our experimental results we conclude that the transcoder which reuses both motion vectors and DCT coefficients shows the best trade-off between complexity and RD performance.

2010 IEEE Intelligent Vehicles Symposium, 2010

ABSTRACT We present a novel middleware approach for in-vehicle service discovery and device integ... more ABSTRACT We present a novel middleware approach for in-vehicle service discovery and device integration that is based on the concept of Service-oriented Architectures (SOA). In order to be able to identify a suitable SOA system, we define a series of criteria the SOA platform should fulfill. These criteria take into account the specific requirements of the automotive domain. Based on these criteria we compare nine different SOA standards and show why the Device Profile for Web Services (DPWS) standard is most suitable as the middleware of an in-car infotainment and communication system. Furthermore, we present a prototypical implementation of an in-vehicle network based on the DPWS middleware. Hence, we enable the integration of nomadic devices by providing their functionalities within the network and consequently including their graphical output into the in-vehicle Human Machine Interface (HMI). Due to the system design it is also possible to use nomadic devices as an additional display to present the HMI. Finally, an in-vehicle controller is included into our SOA and therefore available to all other devices within our system.

ABSTRACT Today's computer systems are becoming more and more ubiquitous, and the incr... more ABSTRACT Today's computer systems are becoming more and more ubiquitous, and the increasing processing power and capabilities of modern mobile devices enable new applications and services. Integrated sensors provide new ways of how users can interact with their environment and are a basis for a wide field of context-aware services.

Proceedings of the 19th ACM international conference on Multimedia - MM '11, 2011

Proceedings of the 2nd international workshop on Multimodal interfaces for automotive applications - MIAA '10, 2010

ABSTRACT In this paper, we describe a flexible in-vehicle Human-Machine-Interface (HMI) that is b... more ABSTRACT In this paper, we describe a flexible in-vehicle Human-Machine-Interface (HMI) that is based on a service-oriented architecture (SOA) enriched by graphical information. Our approach takes advantage of standard web technologies and targets at a solution that can be flexibly deployed in various application scenarios as, e.g., for in-vehicle driver-assistance systems, in-flight entertainment systems or generally spoken, systems which allow multiple persons to interact with an HMI. Furthermore, we consider the integration of consumer electronic devices. The proposed system benefits from its SOA-driven, generic approach and comes along with advantages like platform-independency, scalability, faster time to market and lower price compared to application-specific approaches.

IEEE Transactions on Multimedia, 2013

ABSTRACT Video synchronization is an essential processing step in many multimedia applications, a... more ABSTRACT Video synchronization is an essential processing step in many multimedia applications, and various methods have been proposed in the literature each of which addresses the problem from a different point of vantage. In this article, we present an information theoretic approach to video synchronization, based on the state-of-the-art in hybrid video coding. Time series derived from the videos' instantaneous bitrate demand are correlated in a robust manner employing the recently published ConCor algorithm. We enhance ConCor with integrated normalization capabilities in order to improve its shape-oriented matching performance. Furthermore, we present a mathematical framework to derive the most suitable ConCor parameters given a specific class of input videos. In an extensive experimental analysis, we give an insight into the representation of synchronization-relevant scene changes with bitrate data, and examine the influence of encoding parameters on the synchronization performance. Experiments on diverse video input substantiate the reliable performance of our easy to implement, yet effective video synchronization algorithm which distinguishes itself in that it operates largely without manual intervention.

Die Erfindung bezieht sich auf ein Verfahren zurRegelung motorisch angetriebener Verstelleinricht... more Die Erfindung bezieht sich auf ein Verfahren zurRegelung motorisch angetriebener Verstelleinrichtungen in Kraftfahrzeugen bei dem: a) ein mit dem Motor gekoppelter Signalgeber ein die Drehzahl des Motors reprasentierendes Signal erzeugt, b) ein dem Signalgeber zugeordneter Detektor dieses Signal detektiert und ein entsprechendes Ausgangssignal erzeugt und c) eine mit einem Regelalgorithmus versehene Regeleinheit das Ausgangssignal auswertet und die Drehzahl des Motors in Abhangigkeit von dem Ausgangssignal einstellt. Erfindungsgemas ist vorgesehen, das nach dem Betatigen des Motors toleranzbedingte charakteristische Werte des Signalgebers ermittelt und daraus Korrekturwerte bestimmt werden, die bei der Auswertung der Ausgangssignale (U¶1¶, U¶2¶) berucksichtigt werden, und die Korrekturwerte zumindest solange angepast werden, bis ein vorgegebenes Abbruchkriterium erfullt ist, und wahrend der Bestimmung und Anpassung der Korrekturwerte Zwischenresultate dieser Werte gebildet und zur F...

Das Ziel des SALMON Projektes war die Entwicklung einer Systemlösung zur automatischen Überwachun... more Das Ziel des SALMON Projektes war die Entwicklung einer Systemlösung zur automatischen Überwachung und Analyse der Wasserqualität auf der Basis eines autonomen Unterwasserfahrzeuges (AUV). Dabei wurde bei der Entwicklung des Sensorsystems auf die vorhandene Expertise von -4H- JENA engineering GmbH (4HJE) bei der optischen in situ-Detektion von Nitrat zurückgegriffen. Eine Herausforderung für 4HJE war es, ein miniaturisiertes Komplettsystem zur Messung der Wasserqualität zu entwickeln, welches in das bestehende Unterwasserfahrzeug integriert werden kann und den Umwelteinflüssen Unterwasser (Druck, Temperatur) standhält. Dazu wurde Sensorik unterschiedlicher Hersteller und miniaturisierte Industrie-PCs in das Nutzlastsegment implementiert und die erforderliche Software zur automatischen Wasserqualitätsmessung und -auswertung entwickelt. Der Versuchsträger, das ferngesteuerte Unterwasserfahrzeug (ROV) „CWolf“, wurde vom Fraunhofer Anwendungszentrum Systemtechnik Ilmenau (AST) zur Verfü...

The objective of this contribution is a linear direct drive based on the working principle of hyb... more The objective of this contribution is a linear direct drive based on the working principle of hybrid stepper technology. Herein, reluctant forces enable the thrust of this type of drive. In order to improve the dynamic performance a method adjusting the optimal load angle with respect to the driven velocity is presented. Commonly, the phases of the linear hybrid stepper motor (LHSM) are commutated sinusoidal with a constant load angle of 90 degrees. Due to delay times of sensors, actuators and hardware, the coils of the phases are not energized optimally in terms of maximum force application. Thus, variable load angles subject to velocity are introduced. This contribution comprises the optimization of the load angles. To solve this one-dimensional optimization task, bracketing methods can be used. These algorithms work without derivatives and find the minimum through iterative decreasing of the interval until a desired tolerance is achieved. Regarding the implementation, signal proc...

Embedded information technology (IT) is the dominating enabler for advanced driver assistance sys... more Embedded information technology (IT) is the dominating enabler for advanced driver assistance systems and for the continued introduction of innovations in automotive products. Today’s Car-IT architecture is characterized by a large number of dedicated function electronic control units (ECUs) with relatively low-performance microcontrollers and a heterogeneous set of low-capacity, automotive-specific communication buses. Over the past decades, the approach to add one ECU per new function has led to a complex, difficult to maintain and costly Car-IT infrastructure (Fig. 14.1).

2010 IEEE International Conference on Image Processing, 2010

2008 IEEE International Conference on Vehicular Electronics and Safety, 2008

ABSTRACT Rising communication needs in transportation systems due to meshed control circuits and ... more ABSTRACT Rising communication needs in transportation systems due to meshed control circuits and complex sensor technology like lidar, radar and cameras lead to increasing wiring harness and system complexity. To solve this, we made an approach for a unified car-IT communication-architecture based on IEEE 802.3 switched Ethernet for use in the vehicular environment. In this paper, we present the requirements for and realization of the core-network components to enable deterministic communication and the corresponding real-time calculus for system verification.

Conference on Lasers and Electro-Optics 2012, 2012

We define the finite Q-factor of a continuous-wave lasing resonator as the energy of coherent pho... more We define the finite Q-factor of a continuous-wave lasing resonator as the energy of coherent photons stored in the resonator at a given time over the energy of these coherent photons lost per oscillation cycle.

2008 IEEE International Conference on Vehicular Electronics and Safety, 2008

In this paper we propose a novel in-car realtime streaming multimedia architecture. This architec... more In this paper we propose a novel in-car realtime streaming multimedia architecture. This architecture is based on the Ethernet protocol combined with a single audio/video compression format that is valid throughout the car. Audio/video content deviating from the in-car format is transcoded by a central transcoding unit for delivery in the car. In this context, we compare three different transcoding approaches which differ in their design and performance. In the first scheme a cascaded transcoding unit consisting of a full decoder and a full encoder is studied. In the second approach, the transcoder reuses the motion information extracted from the incoming video stream. The motion information is either adopted without modification or serves for the initialization of a low-complexity motion search process in the encoder. The third transcoder investigated in this work reuses both motion information as well as the encoded residual data (DCT coefficients). All three trancoders have been implemented in an in-car communication prototype. We investigate the performance of the three transcoders by means of their complexity and their rate-distortion (RD) performance. From our experimental results we conclude that the transcoder which reuses both motion vectors and DCT coefficients shows the best trade-off between complexity and RD performance.

2010 IEEE Intelligent Vehicles Symposium, 2010

ABSTRACT We present a novel middleware approach for in-vehicle service discovery and device integ... more ABSTRACT We present a novel middleware approach for in-vehicle service discovery and device integration that is based on the concept of Service-oriented Architectures (SOA). In order to be able to identify a suitable SOA system, we define a series of criteria the SOA platform should fulfill. These criteria take into account the specific requirements of the automotive domain. Based on these criteria we compare nine different SOA standards and show why the Device Profile for Web Services (DPWS) standard is most suitable as the middleware of an in-car infotainment and communication system. Furthermore, we present a prototypical implementation of an in-vehicle network based on the DPWS middleware. Hence, we enable the integration of nomadic devices by providing their functionalities within the network and consequently including their graphical output into the in-vehicle Human Machine Interface (HMI). Due to the system design it is also possible to use nomadic devices as an additional display to present the HMI. Finally, an in-vehicle controller is included into our SOA and therefore available to all other devices within our system.

ABSTRACT Today's computer systems are becoming more and more ubiquitous, and the incr... more ABSTRACT Today's computer systems are becoming more and more ubiquitous, and the increasing processing power and capabilities of modern mobile devices enable new applications and services. Integrated sensors provide new ways of how users can interact with their environment and are a basis for a wide field of context-aware services.

Proceedings of the 19th ACM international conference on Multimedia - MM '11, 2011

Proceedings of the 2nd international workshop on Multimodal interfaces for automotive applications - MIAA '10, 2010

ABSTRACT In this paper, we describe a flexible in-vehicle Human-Machine-Interface (HMI) that is b... more ABSTRACT In this paper, we describe a flexible in-vehicle Human-Machine-Interface (HMI) that is based on a service-oriented architecture (SOA) enriched by graphical information. Our approach takes advantage of standard web technologies and targets at a solution that can be flexibly deployed in various application scenarios as, e.g., for in-vehicle driver-assistance systems, in-flight entertainment systems or generally spoken, systems which allow multiple persons to interact with an HMI. Furthermore, we consider the integration of consumer electronic devices. The proposed system benefits from its SOA-driven, generic approach and comes along with advantages like platform-independency, scalability, faster time to market and lower price compared to application-specific approaches.

IEEE Transactions on Multimedia, 2013

ABSTRACT Video synchronization is an essential processing step in many multimedia applications, a... more ABSTRACT Video synchronization is an essential processing step in many multimedia applications, and various methods have been proposed in the literature each of which addresses the problem from a different point of vantage. In this article, we present an information theoretic approach to video synchronization, based on the state-of-the-art in hybrid video coding. Time series derived from the videos' instantaneous bitrate demand are correlated in a robust manner employing the recently published ConCor algorithm. We enhance ConCor with integrated normalization capabilities in order to improve its shape-oriented matching performance. Furthermore, we present a mathematical framework to derive the most suitable ConCor parameters given a specific class of input videos. In an extensive experimental analysis, we give an insight into the representation of synchronization-relevant scene changes with bitrate data, and examine the influence of encoding parameters on the synchronization performance. Experiments on diverse video input substantiate the reliable performance of our easy to implement, yet effective video synchronization algorithm which distinguishes itself in that it operates largely without manual intervention.

Die Erfindung bezieht sich auf ein Verfahren zurRegelung motorisch angetriebener Verstelleinricht... more Die Erfindung bezieht sich auf ein Verfahren zurRegelung motorisch angetriebener Verstelleinrichtungen in Kraftfahrzeugen bei dem: a) ein mit dem Motor gekoppelter Signalgeber ein die Drehzahl des Motors reprasentierendes Signal erzeugt, b) ein dem Signalgeber zugeordneter Detektor dieses Signal detektiert und ein entsprechendes Ausgangssignal erzeugt und c) eine mit einem Regelalgorithmus versehene Regeleinheit das Ausgangssignal auswertet und die Drehzahl des Motors in Abhangigkeit von dem Ausgangssignal einstellt. Erfindungsgemas ist vorgesehen, das nach dem Betatigen des Motors toleranzbedingte charakteristische Werte des Signalgebers ermittelt und daraus Korrekturwerte bestimmt werden, die bei der Auswertung der Ausgangssignale (U¶1¶, U¶2¶) berucksichtigt werden, und die Korrekturwerte zumindest solange angepast werden, bis ein vorgegebenes Abbruchkriterium erfullt ist, und wahrend der Bestimmung und Anpassung der Korrekturwerte Zwischenresultate dieser Werte gebildet und zur F...

Das Ziel des SALMON Projektes war die Entwicklung einer Systemlösung zur automatischen Überwachun... more Das Ziel des SALMON Projektes war die Entwicklung einer Systemlösung zur automatischen Überwachung und Analyse der Wasserqualität auf der Basis eines autonomen Unterwasserfahrzeuges (AUV). Dabei wurde bei der Entwicklung des Sensorsystems auf die vorhandene Expertise von -4H- JENA engineering GmbH (4HJE) bei der optischen in situ-Detektion von Nitrat zurückgegriffen. Eine Herausforderung für 4HJE war es, ein miniaturisiertes Komplettsystem zur Messung der Wasserqualität zu entwickeln, welches in das bestehende Unterwasserfahrzeug integriert werden kann und den Umwelteinflüssen Unterwasser (Druck, Temperatur) standhält. Dazu wurde Sensorik unterschiedlicher Hersteller und miniaturisierte Industrie-PCs in das Nutzlastsegment implementiert und die erforderliche Software zur automatischen Wasserqualitätsmessung und -auswertung entwickelt. Der Versuchsträger, das ferngesteuerte Unterwasserfahrzeug (ROV) „CWolf“, wurde vom Fraunhofer Anwendungszentrum Systemtechnik Ilmenau (AST) zur Verfü...

The objective of this contribution is a linear direct drive based on the working principle of hyb... more The objective of this contribution is a linear direct drive based on the working principle of hybrid stepper technology. Herein, reluctant forces enable the thrust of this type of drive. In order to improve the dynamic performance a method adjusting the optimal load angle with respect to the driven velocity is presented. Commonly, the phases of the linear hybrid stepper motor (LHSM) are commutated sinusoidal with a constant load angle of 90 degrees. Due to delay times of sensors, actuators and hardware, the coils of the phases are not energized optimally in terms of maximum force application. Thus, variable load angles subject to velocity are introduced. This contribution comprises the optimization of the load angles. To solve this one-dimensional optimization task, bracketing methods can be used. These algorithms work without derivatives and find the minimum through iterative decreasing of the interval until a desired tolerance is achieved. Regarding the implementation, signal proc...