Dynamic power management in a portable media delivery system
First Claim
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1. A method for managing power in a media delivery system operable in either a DC or an AC mode arranged to output audio by way of one or more speakers, comprising:
- setting a maximum allowable sound pressure level (SPL) of an output audio signal that can be produced by the one or more speakers when the media delivery system is operating in the DC mode.
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Abstract
A consumer electronic product (e.g., a portable media player ported to a media delivery accessory) is powered by a limited capacity DC power source (such as a battery or mini-fuel cell). The consumer electronic product limits the maximum allowable sound pressure level (SPL) that can be produced by the speakers. In one embodiment, the maximum allowable SPL is based upon an amount of stored energy available in the limited capacity DC power source.
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Citations
46 Claims
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1. A method for managing power in a media delivery system operable in either a DC or an AC mode arranged to output audio by way of one or more speakers, comprising:
setting a maximum allowable sound pressure level (SPL) of an output audio signal that can be produced by the one or more speakers when the media delivery system is operating in the DC mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A consumer electronic product operable in a DC mode and an AC mode, comprising:
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a portable media player arranged to playback a selected one of a plurality of media files stored therein; and
a media delivery accessory unit electrically coupled to the portable media player having at least one speaker, wherein when the consumer electronic product is operating in the DC mode, a maximum allowable sound pressure level (SPL) of an output audio signal that can be produced by the at least one speaker is set to a DC maximum allowable SPL. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of shutting down a consumer electronic product so as to avoid generation of audio artifacts, comprising:
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determining if a shutdown is imminent, muting an audio amplifier;
providing a user feedback indicating that a loss of power is imminent;
if all remaining electronic components are not powered down, then powering down all remaining electronic components in the consumer electronic product;
if all residual power is exhausted, then discontinuing the user feedback. - View Dependent Claims (27, 28, 29)
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30. Computer program product executable by a processor for shutting down a consumer electronic product so as to avoid generation of audio artifacts, comprising:
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computer code for determining if a shutdown is imminent, computer code for muting an audio amplifier;
computer code for providing a user feedback indicating that a loss of power is imminent;
computer code for powering down all remaining electronic components in the consumer electronic product if all remaining electronic components are not powered down;
computer code for discontinuing the user feedback if all residual power is exhausted; and
computer readable medium for storing the computer code. - View Dependent Claims (31, 32, 33)
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34. Computer program product executable by a processor for managing power in a media delivery system operable in either a DC or an AC mode arranged to output audio by way of one or more speakers, comprising:
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computer code for setting a maximum allowable sound pressure level (SPL) of an output audio signal that can be produced by the one or more speakers when the media delivery system is operating in the DC mode; and
computer readable medium for storing the computer code. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification