Abstract: Methods and systems for dynamically providing content complementary to a content being rendered on mobile devices based on determining a context of the device based on identifying an encoded unique audio identifier. The transmission and playback of the complementary content is synchronized with the currently rendered content by dynamically taking into account the context of a user operating the mobile device. The context of a user may be built from considering a piece of currently rendered content, characteristics of a profile of a vendor, characteristics of the individual user and/or the user's individual profile, date, time of day and/or further additional information. The context may further take into account the current position and/or location of the user as acoustically triangulated based on sending and/or receiving unique audio identifiers as a high frequency audio signal.

Abstract: The present disclosure describes an efficient computer-implemented near-field communication system and method based on broadcasting audio signals for dynamically providing context-related additional content to a mobile device. In embodiments of the present invention, the additional content is mapped to specific audio watermarks and/or triggering commands which are encoded together into a digital signal. Based on continuously scanning the received background noise, an exactly defined frequency range and volume is dynamically selected for broadcasting the signal. Hence, the encoded digital signal is further modulated into an audio signal in the exactly defined frequency range. In embodiments of the present invention, the selected exactly defined frequency range for transmitting the audio signal may preferably be located in the ultrasound and/or infrasound frequency range.

Abstract: Methods and systems for dynamically providing content complementary to a content being rendered on mobile devices based on determining a context of the device based on identifying an encoded unique audio identifier. The transmission and playback of the complementary content is synchronized with the currently rendered content by dynamically taking into account the context of a user operating the mobile device. The context of a user may be built from considering a piece of currently rendered content, characteristics of a profile of a vendor, characteristics of the individual user and/or the user's individual profile, date, time of day and/or further additional information. The context may further take into account the current position and/or location of the user as acoustically triangulated based on sending and/or receiving unique audio identifiers as a high frequency audio signal.

Abstract: The present disclosure describes an efficient computer-implemented near-field communication system and method based on broadcasting audio signals for dynamically providing context-related additional content to a mobile device. In embodiments of the present invention, the additional content is mapped to specific audio watermarks and/or triggering commands which are encoded together into a digital signal. Based on continuously scanning the received background noise, an exactly defined frequency range and volume is dynamically selected for broadcasting the signal. Hence, the encoded digital signal is further modulated into an audio signal in the exactly defined frequency range. In embodiments of the present invention, the selected exactly defined frequency range for transmitting the audio signal may preferably be located in the ultrasound and/or infrasound frequency range.

Abstract: The invention relates to a method and a device for contrast enhancement for display devices. A high-contrast representation of optical signals and/or symbols is achieved by providing a light-absorbing and/or light-deflecting background which is dark in comparison to the symbol or signal to be displayed and thus highlights said symbol or signal. The following invention enables a high-contrast representation of optical signals and symbols by the provision of a dark, light-absorbing background.

Abstract: The invention relates to a method and a device for contrast enhancement for display devices. A high-contrast representation of optical signals and/or symbols is achieved by providing a light-absorbing and/or light-deflecting background which is dark in comparison to the symbol or signal to be displayed and thus highlights said symbol or signal. The following invention enables a high-contrast representation of optical signals and symbols by the provision of a dark, light-absorbing background.

Abstract: A field sensor (1) comprising means for measuring a magnetic field and an electric field, wherein at least six capacitor plates (5, 6, 7, 15, 16, 17, 25, 26, 27, 35, 36, 37)are provided which are arranged in a cube and in that in the space thus formed the means for measuring the magnetic field is provided, which means is three-dimensionally aligned and for example consists of coils (2, 3, 4), Hall-effect sensors, magnetoresistors or the like.