Abstract: An apparatus for providing low frequency expansion of speech includes a nonlinear function element, a band-pass filter element and a level control element. The non-linear function element is configured to receive a signal including at least two harmonic components and to produce a signal including at least one lower frequency harmonic component having a lower frequency than a highest frequency component of the at least two harmonic components responsive to the signal including at least two harmonic components. The band-pass filter element is in communication with the non-linear function element and configured to filter the signal including the at least one lower frequency harmonic component. The level control element is configured to apply a level control to alter the filtered signal based on a feature vector associated with an input speech signal.

Abstract: This invention relates to a device, a method, a software application program, a software application program product and an audio device for processing a digital signal, wherein the digital signal is separated and downsampled into at least two downsampled subband signals, wherein at least one of the at least two downsampled subband signals is equalized, and wherein the at least two downsampled subband signals are upsampled and combined into a digital output signal.

Abstract: A media subsystem of a processing element includes a plurality of elements and a latency manager. The plurality of elements are capable of processing media data including a plurality of instances wherein a first element inserts a length of media data into buffer(s) from which a second element thereafter reads the length of media data for subsequent output from the media subsystem. The latency manager is capable of determining a latency requirement of the media subsystem, and then dynamically tuning the length of media data inserted into the buffer(s) based upon the latency requirement, including increasing or decreasing the length of media data inserted into the buffer(s) during one or more instances(s).

Abstract: An apparatus for providing a beat and tatum tracker includes an accent filter bank, a periodicity estimator, a period estimator and a phase estimator. The accent filter bank is configured to downsample an input audio signal. The periodicity estimator is configured to determine a periodicity based on the downsampled signal. The period estimator is configured to determine a period based on the periodicity. The phase estimator is configured to estimate a phase based on the period for determining beat and tatum times of the input audio signal.

Abstract: The invention relates to an audio processing system 1. order to improve the audio processing, the system comprises at least one audio processing component 11, 12, 13 with a group of real-time functions 14 for processing audio data and a group of control functions 15 for processing control signals. The system further comprises at least one processor 16 providing a first process 20 for executing real-time functions 14 of the at least one audio processing component 11, 12, 13 using a basically constant processing power and at least one further process 30 for executing control functions 15 of the at least one audio processing component 11, 12, 13 when needed without affecting the processing power employed for the first process 20. The invention relates equally to a corresponding method and to a corresponding software program product.

Abstract: This invention describes a method for adjusting the loudness and the spectral content of digital audio signals in a real-time using warped spectral filtering. A warped processing module modifies a spectral content of a digital audio signal with a set of gains for a plurality of non-linearly-scaled frequency bands determined by a warping factor ? of a warped delay line. Warped delay line signals, generated by the warped delay line, are processed by a warped filter block containing multiple warped finite impulse response filters, e.g., Mth band filters, using individual warped spectral filtering in said plurality of the non-linearly-scaled frequency bands, which is followed by a conventional processing by a dynamic range control/equalization block. The present invention describes another innovation, that is embedding the warped processing module in a two-channel quadrature mirror filter (QMF) bank for improving processing efficiency at high sample rates.

Abstract: In one aspect this invention provides a method to operate a mobile device that generates at least one user interaction sound, and in another aspect provides a mobile device (10) that operates in accordance with the method. The method includes determining or estimating the frequency content of a background noise signal; designing an audio filter (20) according to the determined spectral content of the background noise, and according to a spectral content of the user interaction sound; and filtering the user interaction sound using the designed audio filter so as to selectively at least one of amplify or attenuate at least one portion of the spectral content of the user interaction sound in order to maintain at least the audibility of the user interaction sound.

Abstract: An apparatus and method for presenting one or more auditory icons are provided to deliver contextual information in a timely manner to the user without requiring the user to view the mobile terminal's display. The auditory icons may correspond to visual icons that are provided on a display of the mobile terminal, for example, a navigational bar. The mobile terminal receives a plurality of messages from one or more message sources, prioritizes them according to one or more context values, and presents to the user auditory icons associated with the messages in accordance with any number of pre-set preferences set by the user.