Portable audio playback device with bass enhancement
First Claim
1. A portable audio device comprising:
- a portable audio playback unit comprising an audio circuit for generating an audio signal and at least one speaker coupled to the audio circuit, said speaker being responsive to the audio signal to generate a first audible signal; and
a wireless interface coupled to the audio circuit to transmit an enhancement signal comprising low frequency components of the audio signal, the enhancement signal being derived from the audio signal to an external audio system that generates a second audible signal enhancing the first audible signal.
4 Assignments
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Accused Products
Abstract
Wirelessly linking a portable audio device to an external audio system permits the external audio system to generate audible signals that enhance local playback of audio by the portable device. For example, the portable device wirelessly transmits lower frequency components of an audio signal to a subwoofer system for reproduction of bass frequencies extending below the playback capability of the portable device. In this manner, the external audio system provides bass enhancement for the portable audio device. Wireless transmissions between the portable audio device and the external audio system may be, but are not limited to, optical or radio frequency (RF) transmissions. Where RF signaling is used, the wireless link may be based on wireless network links, such as those supported by Bluetooth and 802.11b standards, or based on, for example, dedicated RF interfaces.
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Citations
76 Claims
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1. A portable audio device comprising:
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a portable audio playback unit comprising an audio circuit for generating an audio signal and at least one speaker coupled to the audio circuit, said speaker being responsive to the audio signal to generate a first audible signal; and a wireless interface coupled to the audio circuit to transmit an enhancement signal comprising low frequency components of the audio signal, the enhancement signal being derived from the audio signal to an external audio system that generates a second audible signal enhancing the first audible signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An audio system comprising:
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a portable audio device including a first audio circuit and at least one speaker to output a first audible signal responsive to an audio signal; an external audio system including a second audio circuit and a woofer to enhance the first audible signal by producing a second audible signal responsive to low-frequency components of the audio signal; and a wireless link to transmit the low-frequency components of the audio signal from the portable audio device to the external audio system. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. A method of enhancing audio playback of a portable audio device, the method comprising:
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outputting a first audible signal from the portable audio device responsive to an audio signal; and transmitting an enhancement signal containing the low-frequency components of the audio signal over a wireless network interface from the portable audio device to an external audio system that provides bass enhancement. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76)
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Specification