Method and system for regulating power in portable audio/video playback device
First Claim
1. A method for regulating power in a portable audio/video playback device electrically supplied by a power unit, said method comprising the steps of:
- detecting a present remaining power a in said power unit;
reading an audio/video multimedia file or data and computing a playback time β
of said file or data;
computing an average power consumption rate γ
of said portable audio/video playback device; and
computing whether the present remaining power α
is sufficient for a complete playback of said audio/video multimedia file or data, and, if the present remaining power α
is not sufficient for a complete playback of said audio/video multimedia file or data, reducing an output level of a video or audio output signal so that the complete playback of said audio/video multimedia file or data may be accomplished prior to exhaustion of the power.
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Accused Products
Abstract
A method and a system for regulating power in a portable audio/video playback device enabling the portable audio/video playback device to completely play an audio/video multimedia file or data without sufficient power or external power. A processing unit is employed for detecting a remaining power of the portable audio/video playback device and for computing an average power consumption rate and a remaining playback time of the audio/video multimedia file or data to thereby appropriately reduce an output level of the video or audio output signals. Accordingly, power consumption of the portable audio/video playback device is minimized so that a complete playback of the audio/video multimedia file or data can be performed by the portable audio/video playback device before the power is exhausted.
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Citations
20 Claims
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1. A method for regulating power in a portable audio/video playback device electrically supplied by a power unit, said method comprising the steps of:
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detecting a present remaining power a in said power unit;
reading an audio/video multimedia file or data and computing a playback time β
of said file or data;
computing an average power consumption rate γ
of said portable audio/video playback device; and
computing whether the present remaining power α
is sufficient for a complete playback of said audio/video multimedia file or data, and, if the present remaining power α
is not sufficient for a complete playback of said audio/video multimedia file or data, reducing an output level of a video or audio output signal so that the complete playback of said audio/video multimedia file or data may be accomplished prior to exhaustion of the power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for regulating power in a portable audio/video playback device electrically supplied by a power unit, said system comprising:
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an audio/video playback unit for reading an audio/video multimedia file or data;
a video unit for producing a video output signal;
an audio unit for producing an audio output signal; and
a processing unit connected to said power unit, said video unit, said audio unit and said audio/video playback unit, for detecting a remaining power in said power unit and computing a playback time of said audio/video multimedia file or data and an average power consumption rate of said power unit, whereby, in a situation of insufficient power, said system operates to reduce output levels of the video and audio output signals respectively produced by said video and audio units. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification