Markus Schnell

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The MPEG-4 Low Delay Advanced Audio Coding (AAC-LD) scheme has recently evolved into a popular algorithm for audio communication. It produces excellent audio quality at bitrates between 64 kbit/s and 48 kbit/s per channel. This paper introduces an enhancement to AAC-LD which reduces the bitrate demand by 25-33%. This is achieved by adding both a(More)
This article proposes a concept-to-speech system with automated prosody learning based on reinforcement learning. The concept-to-speech system, named Demosthenes, is an extension of the text-to-speech system DreSS. Demosthenes is responsible for template-based text generation and symbolic prosody prediction, while DreSS takes care of acoustic prosody and(More)
The combination of textile fabrics with microelectronics will lead to completely new applications, thus achieving elements of ambient intelligence. The integration of sensor or actuator networks, using fabrics with conductive fibres as a textile motherboard enable the fabrication of large active areas. In this paper we describe an integration technology for(More)
Low delay perceptual audio coding has recently gained wide acceptance for high quality communication. While common schemes are based on the well-known Modified Discrete Cosine Transform (MDCT) filterbank, this paper describes novel coding algorithms that, for the first time, make use of dedicated low delay filterbanks, thus achieving improved coding(More)
Textiles are omnipresent in our daily life. Their combination with microelectronics will lead to completely new applications realizing elements of ambient intelligence. In this paper, a textile-based large-area sensor network integrated into a carpet is presented: Based on a network of simple information processing elements with integrated sensors or(More)
Super wideband (SWB) communication calls more and more attention as can be seen by the standardization activities of SWB extensions for well-established wideband codecs, e.g. G.722 or G.711.1. This paper presents a technical solution for extending the G.722 codec and compares the new technology to other standardized SWB codecs. Hereby, a closer look is(More)
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