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Although the LPDDR4 interface has enabled industry requirements, such as low power consumption and high bandwidth, additional evolution of the current LPDDR4 performance is expected. To respond to the need for more power efficient devices with higher bandwidth, a 2nd generation LPDDR4 (referred to as LPDDR4X), with extreme low power and extended performance, has been developed in this work. In the...
Resets are required in the design to initialize the hardware for system operation and to force it into a known state for simulation or to recover from an error. Given the increasing design complexity and time-to-market pressures, figuring out the registers which do not require resets is extremely challenging. In this paper, we present a novel algorithm which uses observability based sequential analysis...
The power consumption of a mobile application processor (AP) is strongly limited by the SRAM minimum operating voltage, VMIN [1], since the 6T bit cell must balance between write-ability and bit cell stability. However, the SRAM VMIN scales down gradually with advanced process nodes due to increased variability. This is evident with the quantized device-width and limited process-knobs of a FinFET...
Despite the massive influx of mobile apps into the market, not everyone is "mobile literate." The steady growth of the mobile industry has highlighted the emerging need to advance mobile literacy. This study uses an individual level mobile app usage dataset to examine the potential of mobile platform-based social games as training tools for mobile literacy. We choose Anipang, a popular mobile...
In this paper, we propose a load distribution scheme on a per-flow basis over multiple controllers in SDN (Software-Defined Networking). Specifically, when the capacity of a controller reaches a threshold, the controller makes incoming messages be migrated to other controllers to prevent them from being blocked. Analytical results show that our scheme has lower blocking probability and higher controller...
This paper proposes a new provisioning scheme of the WDM networks to guarantee the recovery time defined in service level agreement (SLA). In our proposed scheme, the fault management scheme and working path or a pair of paths are selected based on the comparison of the pre-calculated recovery time with the recovery time required by the customer in resource efficient manner. Simulation results show...
The demands for high-performance smart mobile devices are growing exponentially every year. Like the PC market, 64b CPUs are needed to meet this demand. Furthermore, mobile GPU performance is becoming increasingly important as mobile game graphics requirements are pushing the limits of GPU capabilities. For an enhanced mobile game user experience, a multi-core GPU is required. CPU/GPU power efficiency...
Robotic gait rehabilitation devices enable efficient and convenient gait rehabilitation by mimicking the functions of physical theraphists. In manual gait rehabilitation training, physical theraphists have patients practice and memorize normal gait patterns by applying assistive torque to the patient's joint once the patient's gait deviates from the normal gait. Thus, one of the most important factors...
Tactile display device that can present tactile information for visually impaired persons has been developed. Users can get certain information by pressure from the pins raised at varying heights on arms. The effectiveness of the developed device will be discussed based on experiments.
Disturbance vibration reduction is critical in many applications using machine vision. The off-focusing or blurring error caused by vibration degrades its performance. Instead of going with the more familiar approach like vibration absorber, a real-time disturbance estimation and avoidance is proposed. Instantaneous motion due to the disturbance is sensed by an attitude heading reference system (AHRS)...
Robotic gait rehabilitation devices enable efficient and convenient gait rehabilitation by mimicking the functions of physical theraphists. In manual gait rehabilitation training, physical theraphists have patients practice and memorize normal gait patterns by applying assistive torque to the patient's joint once the patient's gait deviates from the normal gait. Thus, one of the most important factors...
This paper proposes a mobility-aware flow admission control scheme in OpenFlow based mobile networks. Proposed scheme performs classification of the input messages at the control plane considering mobility and types of services. Then, different amount of capacities are allocated according to the class for prioritized admission control. Proposed scheme is evaluated in terms of blocking probability...
Robotic gait rehabilitation devices enable efficient and convenient gait rehabilitation by mimicking the functions of physical theraphists. In manual gait rehabilitation training, physical theraphists have patients practice and memorize normal gait patterns by applying assistive torque to the patient's joint once the patient's gait deviates from the normal gait. Thus, one of the most important factors...
Tactile display device that can present tactile information for visually impaired persons has been developed. Users can get certain information by pressure from the pins raised at varying heights on arms. The effectiveness of the developed device will be discussed based on experiments.
Object recognition is one of the most important tasks in computer vision due to its wide variety of applications from small hand-held devices to surveillance systems in large public facilities. Even though biologically inspired approaches have been recently revealed to take another significant step forward to reduce its large power consumption, it still consumes relatively large amounts of energy...
72.5GFLOPS GPGPU computing, 240 Mpixel/s sustainable image signal processing and 60fps 1080p multi-format video codec (MFC) capabilities are integrated with an 1.7GHz out-of-order-execution dual-core ARMv7A architecture CPU and 12.8GB/s memory subsystem for a next-generation application processor. The GPU-based general-purpose computing capability can deliver 10× higher energy efficiency in compute-intensive...
Samsung's next-generation 32nm dual/quad-core Exynos™ processor integrates 2 or 4 ARM-v7A architecture cores, a 2-port DRAM controller and numerous multimedia accelerators and connectivity blocks on the same die. It is an application processor (AP) designed to cover a wide variety of mobile applications and handle unprecedented data-processing throughput and multimedia performance, without sacrificing...
Over-actuated feedback control system has advantages of increasing maneuverability and robust performance in fault situation but probability of fault occurrence is also increase because of the increasing the number of actuators and sensors. Furthermore if there has no appropriate fault tolerant strategy, more hazardous accident could occur so fault tolerant strategy is highly emphasized in over-actuated...
In this paper we present Vortex: a reconfigurable Network-on-Chip platform suitable for implementing domain-specific hardware accelerators in a design efficient manner. Our Vortex platform provides a flexible means to compose domain-specific accelerators for streaming applications such as performance critical machine vision systems. By substituting a traditional shared-bus architecture with low latency...
Reconfigurable hardware such as FPGAs are being increasingly employed for application acceleration due to their high degree of parallelism, flexibility and power efficiency — factors which are key in the rapidly evolving field of embedded real-time vision. While recent advances in technology have increased the capacity of FPGAs, lack of standard models for developing custom accelerators creates issues...
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