Abstract:
Ein Pianoforteinstrument besitzt ein Spielwerk (11) mit Tasten. Ausserdem sind Saiten vorgesehen, die über einen Mechanismus bei einer Betätigung der Tasten angeschlagen und in Schwingung versetzt werden. Die Schwingungen der Saiten werden auf einen Resonanzboden (20) übertragen. Eine Einrichtung (25, 26) zur Einspeisung zusätzlicher Schwingungsenergie in den Resonanzboden (20) ist vorgesehen. Ausserdem sind Sensoren (15) vorgesehen, die die Betätigung der Tasten des Spielwerks (11) mittelbar oder unmittelbar detektieren. Die Messwerte der Sensoren (15) werden einer Einrichtung (30) zur Klangerweiterung zugeführt. Die Einrichtung (30) zur Klangerweiterung ist mit Einrichtungen (31, 33, 34, 35) ausgerüstet, die abhängig von den Messwerten der Sensoren (15) Daten zusammenstellen, die einem gewünschten Klangcharakteristikum entsprechen. Die Einrichtung (30) zur Klangerweiterung führt über die Einrichtung (25, 26) zur Einspeisung zusätzliche Schwingungsenergie entsprechend den ermittelten Daten dem Resonanzboden (20) zu.
Abstract:
The invention relates to a virtual audio bandwidth extender, and more particularly a device for increasing the perceived bandwidth of audio signals in equipment having limited bandwidth, especially in mobile telephones. The invention also relates to a communication apparatus comprising such a device. The invention provides a device for increasing the perceived bandwidth in an audio signal path with limited bandwidth, comprising: an input terminal (1) for connecting an audio signal, and an output terminal (2) for connecting a speaker unit for generating an acoustic signal. According to the invention the device comprises a splitter (3) dividing the audio path into two branches, a first branch (4) for passing a part of the audio signal substantially without processing, and a second branch (5) for processing a part of the audio signal. The second branch comprises means for producing harmonics (7, 8, 9) of the audio signal. A combiner (6) is provided for adding the harmonics produced in the second branch to the part of the signal in the first branch at the output terminal. Thereby, the bandwidth is virtually extended resulting in enhanced quality of the audio signal.
Abstract:
The invention relates to a virtual audio bandwidth extender, and more particularly a device for increasing the perceived bandwidth of audio signals in equipment having limited bandwidth, especially in mobile telephones. The invention also relates to a communication apparatus comprising such a device. The invention provides a device for increasing the perceived bandwidth in an audio signal path with limited bandwidth, comprising: an input terminal (1) for connecting an audio signal, and an output terminal (2) for connecting a speaker unit for generating an acoustic signal. According to the invention the device comprises a splitter (3) dividing the audio path into two branches, a first branch (4) for passing a part of the audio signal substantially without processing, and a second branch (5) for processing a part of the audio signal. The second branch comprises means for producing harmonics (7, 8, 9) of the audio signal. A combiner (6) is provided for adding the harmonics produced in the second branch to the part of the signal in the first branch at the output terminal. Thereby, the bandwidth is virtually extended resulting in enhanced quality of the audio signal.
Abstract:
Synthesizer models for emulating musical instruments are improved to take into account sympathetic string vibrations. One embodiment of the present invention scales an output signal from a sound synthesis model (220) and uses the scaled signal as an input signal for a number of single-string emulators (201-212) causing the single-string emulators to produce sound signals corresponding to sympathetic string vibrations. The output signals from the synthesis model (220) and from all of the single-string emulators (201-212) are added together. Another embodiment employs an octave's worth of single-string emulators to emulate the lower strings of an emulated instrument. Still another embodiment is a synthesizer which includes an input bus (220A) for accepting a sound signal, scaling means (244), a plurality of single-string emulators, and means for summing output signals from the string emulators. Embodiments preferably employ waveguide synthesis or the plucked string model to emulate single strings.