Enhancing audio using a mobile device
First Claim
1. A method, performed by a mobile device, for improving quality of an audio signal being played back by an audio system that includes a source device and at least one rendering device, the method comprising:
- detecting a period of silence in the audio signal;
measuring ambient noise characteristics of an acoustic space responsive to detecting the period of silence;
calculating a frequency response of the ambient noise characteristics;
calculating a digital filter based on the calculated frequency response; and
communicating the digital filter to the source device, the source device being configured to perform adjustments to improve the audio signal based on the digital filter.
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Accused Products
Abstract
Embodiments disclosed herein enable detection and improvement of the quality of the audio signal using a mobile device by determining the loss in the audio signal and enhancing audio by streaming the remainder portion of audio. Embodiments disclosed herein enable an improvement in the sound quality rendered by rendering devices by emitting an test audio signal from the source device, measuring the test audio signal using microphones, detecting variation in the frequency response, loudness and timing characteristics using impulse responses and correcting for them. Embodiments disclosed herein also compensate for the noise in the acoustic space by determining the reverberation and ambient noise levels and their frequency characteristics and changing the digital filters and volumes of the source signal to compensate for the varying noise levels.
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Citations
20 Claims
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1. A method, performed by a mobile device, for improving quality of an audio signal being played back by an audio system that includes a source device and at least one rendering device, the method comprising:
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detecting a period of silence in the audio signal; measuring ambient noise characteristics of an acoustic space responsive to detecting the period of silence; calculating a frequency response of the ambient noise characteristics; calculating a digital filter based on the calculated frequency response; and communicating the digital filter to the source device, the source device being configured to perform adjustments to improve the audio signal based on the digital filter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computer program product comprising computer executable program code recorded on a computer readable non-transitory storage medium, said computer executable program code when executed, performing a method for improving quality of an audio signal being played back on an audio system that includes a source device and at least one rendering device, the method comprising:
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detecting a period of silence in the audio signal; measuring ambient noise characteristics of an acoustic space responsive to detecting the period of silence; calculating a frequency response of the ambient noise characteristics; calculating a digital filter based on the calculated frequency response; and communicating the digital filter to the source device, the source device being configured to perform adjustments to improve the audio signal based on the digital filter. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A mobile device configured to obtain a digital filter for improving quality of an audio signal being played back by an audio system that includes a source device and at least one rendering device, comprising:
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at least one microphone configured to detect the audio signal; and a processing unit configured to; detect a period of silence in the detected audio signal; measure ambient noise characteristics of an acoustic space responsive to detecting the period of silence; calculate a frequency response of the ambient noise characteristics; calculate a digital filter based on the calculated frequency response; and communicate the digital filter to the source device, the source device being configured to perform adjustments to improve the audio signal based on the digital filter. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification