Digital loudspeaker arrays (DLAs) are electroacoustic transducers reconstructing acoustic signals out of binary audio streams, usually consisting of a digital signal processing module driving multiple actuators (small loudspeakers). In this work a DLA prototype was implemented using an all-digital audio chain driven by 1-bit sigma–delta signals. The prototype implementation is described and its...

A multihop wireless ad hoc network consists of a number of nodes that form a dynamic topology with ad hoc wireless links among neighboring nodes. These nodes are typically limited in resources such as bandwidth, computation power, memory, and battery. Quality of Service (QoS) is usually defined as a set of service requirements that need to be met by the network while transporting a packet strea...

Remote sensing technology serves as a powerful tool for analyzing geospatial characteristics of flood inundation events at various scales. However, the performance of remote sensing methods depends heavily on the flood characteristics and landscape settings. Difficulties might be encountered in mapping the extent of localized flooding with shallow water on riverine floodplain areas, where patch...

The Netherlands is a highly urbanized area. In addition to flooding from the sea due to storm surges and high water discharges from rivers, flooding from major lakes is also a threat. Since 2011 there is a new system in operational use (24 hours per day, 7 days per week), for the prediction of flooding at Lake IJssel, Lake Marken, and the lakes bordering them. This system, RWsOS Meren (Genseber...

During typical childhood interactions with screen-media, two features are prominent. First, input is dominated by audio-visual signals and second, these predominately provide children ready-ma...

Prior to the implementation of CO2 injection EOR projects, the screening evaluation of candidate reservoirs will promote the economic benefits of CO2 injection. Currently, a uniform screening method for CO2 miscible flooding does not exist. Based on more than 112 successfully implemented CO2 miscible flooding reservoirs, which was referred in 2010 Worldwide EOR Survey, and CO2 miscible flooding...

MP3 is the popular audio coding standard. But now, a new higher quality audio coding standard Advanced Audio Coding (AAC) is proposed and widely used. The quantization/re-quantization is essential in both MP3 and AAC. It proposes a new high accuracy estimation algorithm for MP3 and MEPG-4 AAC audio coding. The algorithm can be applied not only for re-quantization process in decoder, but also fo...

We have developed the “Internet Speaker” (IS), a network-enabled single board computer embedded into a conventional audio speaker. Audio streams are transmitted in the LAN using multicast packets, and the IS can select any one of them and play it back. A key requirement for the IS is that it must be capable of playing any type of audio stream, independent of the streaming protocol, or the encod...

In this paper, the audio emotion recognition system is proposed that uses a mixture of rule-based and machine learning techniques to improve the recognition efficacy in the audio paths. The audio path is designed using a combination of input prosodic features (pitch, log-energy, zero crossing rates and Teager energy operator) and spectral features (Mel-scale frequency cepstral coefficients). Me...

One significant challenge in new platform design is how to add new and improved capabilities without increasing the power required to provide a particular function. This paper focuses on two key Input/Output (I/O) technologies provided by the chipset: integrated audio and the interface to the storage device (hard drive). First, we examine the architectural features of Intel High Definition (HD)...