Patent
Dynamic volume control system
TLDR
In this article, a dynamic volume control system in an audio processor uses gain and delay signals from a digital signal processor to dynamically control the user-selected volume of the audio processor.Abstract:
A dynamic volume control system in an audio processor uses gain and delay signals from a digital signal processor to dynamically control the user-selected volume of the audio processor. The digital signal processor executes audio signal processing operations that affect the gain applied to the audio signal so that the signal gain inherent in the signal processing path is known. The digital signal processor transfers the known gain and a predicted group delay signal to the dynamic volume control system to dynamically adjust the user-selected volume of the system. The digital signal processor is integrated with a digital-to-analog converter (DAC) in a dynamic volume control system that exploits the known gain and group delay to perform DAC volume control.read more
Citations
More filters
Patent
Audiovisual reproduction system
TL;DR: In this paper, a multitask operating system consisting of a central unit managing a sound control circuit and a telecommunications modem connected to a distribution network controlled by a host server is presented.
Patent
Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal
TL;DR: In this paper, the authors proposed a measurement and control of perceived sound loudness and the perceived spectral balance of an audio signal, which is useful in one or more of: loudness-compensating volume control, automatic gain control, dynamic range control (including, for example, limiters, compressors, expanders, etc.), dynamic equalization, and compensating for background noise interference in an audio playback environment.
Patent
Audio gain control using specific-loudness-based auditory event detection
TL;DR: In this paper, a dynamic gain modification is applied to an audio signal at least partly in response to auditory events and/or the degree of change in signal characteristics associated with said auditory event boundaries.
Patent
Method, apparatus and computer program for calculating and adjusting the perceived loudness of an audio signal
TL;DR: One or a combination of two specific loudness model functions selected from a group of two or more of such functions are employed in calculating the perceptual loudness of an audio signal as mentioned in this paper, which results in a perceived loudness substantially the same as a reference loudness.
Patent
Gaming Machine With Surround Sound Features
James Bonney,Eric M. Pryzby +1 more
TL;DR: In this paper, a decoder is added in some embodiments to convert monophonic and stereo wagering games into surround sound and the surround sound may be implemented as true surround sound or as virtual surround sound.
References
More filters
PatentDOI
Stereo enhancement system
TL;DR: In this article, a stereo enhancement system processes the difference signal component generated from a pair of left and right input signals to create a broadened stereo image reproduced through a pair speakers or through a surround sound system.
PatentDOI
Three-dimensional auditory display apparatus and method utilising enhanced bionic emulation of human binaural sound localisation
TL;DR: In this paper, a front to back cue in the form of attenuation and boosting of certain frequency components of the signal, an elevational cue in form of severe attenuation of a selected frequency component, i.e. variable notch filtering, an azimuth cue by means of splitting the signal into two signals and delaying one of them by a selected amount which is not greater than.67 milliseconds, an out of head localization cue by introducing delayed signals corresponding to early reflections of the original signal, a depth cue by selectively amplitude scaling the primary signal and the early reflection and
Patent
Automatic noise compensation system for audio reproduction equipment
TL;DR: In this paper, the authors describe a system that produces an acoustic signal in a listening space and includes devices for generating a desired volume signal, a noise signal representative of ambient noise conditions in the listening space, and an audio signal.
PatentDOI
Method and apparatus for changing the timbre and/or pitch of audio signals
TL;DR: In this paper, a pitch shifter shifts the pitch of the input signal by periodically scaling the resampled input signal using a window function to create an output signal, which determines the rate at which the data is replicated by the window function.
PatentDOI
Stereo enhancement and directivity servo
TL;DR: In this article, the sum and difference signals that are processed for stereo image enhancement are used to increase the apparent directivity of the stereo sound by the use of servo systems.