Dual-purpose sound system for audio rendering and ultrasonic beacon signaling
AssigneeNokia Solution and Networks Oy
InventorsWalter ETTER, Gang Huang
Life of this patent
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Abstract
Apparatus and method of implementing a dual-purpose sound system. In an embodiment, the apparatus comprises a first stage comprising a master volume controller configured to perform volume control of audio signals for audio channels of a sound system to generate variable-volume audio signals for the audio channels, and a second stage comprising an audio mixer configured to mix the variable-volume audio signals for a target set of the audio channels with fixed-volume ultrasonic signals for localization to generate at least two combined audio/ultrasonic signals configured for output to loudspeakers of the sound system corresponding with the target set of the audio channels.
Claims20
An apparatus, comprising:
- a first stage comprising a master volume controller configured to perform volume control of audio signals for audio channels of a sound system to generate variable-volume audio signals for the audio channels;
- and
- a second stage comprising an audio mixer configured to mix the variable-volume audio signals for a target set of the audio channels with fixed-volume ultrasonic signals for localization to generate at least two combined audio/ultrasonic signals configured for output to loudspeakers of the sound system corresponding with the target set of the audio channels.
A method comprising:
- performing, at a first stage, volume control of audio signals for audio channels of a sound system to generate variable-volume audio signals for the audio channels;
- and
- mixing, at a second stage, the variable-volume audio signals for a target set of the audio channels with fixed-volume ultrasonic signals for localization to generate at least two combined audio/ultrasonic signals configured for output to loudspeakers of the sound system corresponding with the target set of the audio channels.
A computer readable medium embodying programmed instructions which, when executed by a processor, are operable for performing a method of operating a dual audio system, the method comprising:
- performing, at a first stage, volume control of audio signals for audio channels of a sound system to generate variable-volume audio signals for the audio channels;
- and
- mixing, at a second stage, the variable-volume audio signals for a target set of the audio channels with fixed-volume ultrasonic signals for localization to generate at least two combined audio/ultrasonic signals configured for output to loudspeakers of the sound system corresponding with the target set of the audio channels.
Dependencies are inferred from the claim text.