Audio signal amplifier for karaoke player
First Claim
1. An apparatus, comprising:
- a DVD/CD reader port for coupling to a DVD/CD reader;
a microphone input to receive audio signals from an external microphone;
an MPEG decoder coupled to the DVD/CD reader port and the microphone input, the MPEG decoder having first and second output terminals;
a processor coupled to the MPEG decoder, the processor to control the MPEG decoder; and
a configurable amplifier coupled to the first and second output terminals of the MPEG decoder, wherein a first audio signal originating from the first output terminal is selectively amplified by the configurable amplifier circuit in accordance with a second signal originating from the second output terminal, wherein;
when the external microphone is electrically coupled to the apparatus via the microphone input, the second signal has a first state indicating the presence of the external microphone and the first audio signal comprises a combination of information from the DVD/CD reader and a signal from the external microphone; and
when the external microphone is not electrically coupled to the apparatus via the microphone input, the second signal has a second state indicating the absence of the external microphone and the first audio signal comprises information from the DVD/CD reader.
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Accused Products
Abstract
A configurable amplifier circuit for a karaoke player is described. In one embodiment, a karaoke player includes: a DVD/CD reader port for coupling to a DVD/CD reader, a microphone input to receive audio signals from an external microphone, an MPEG decoder coupled to the DVD/CD reader port and the microphone input, the MPEG decoder having first and second output terminals, a processor coupled to the MPEG decoder, the processor to control the MPEG decoder, and a configurable amplifier coupled to the first and second output terminals, wherein a first audio signal originating from the first output terminal is selectively amplified by the configurable amplifier circuit in accordance with a second signal originating from the second output terminal.
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Citations
24 Claims
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1. An apparatus, comprising:
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a DVD/CD reader port for coupling to a DVD/CD reader; a microphone input to receive audio signals from an external microphone; an MPEG decoder coupled to the DVD/CD reader port and the microphone input, the MPEG decoder having first and second output terminals; a processor coupled to the MPEG decoder, the processor to control the MPEG decoder; and a configurable amplifier coupled to the first and second output terminals of the MPEG decoder, wherein a first audio signal originating from the first output terminal is selectively amplified by the configurable amplifier circuit in accordance with a second signal originating from the second output terminal, wherein; when the external microphone is electrically coupled to the apparatus via the microphone input, the second signal has a first state indicating the presence of the external microphone and the first audio signal comprises a combination of information from the DVD/CD reader and a signal from the external microphone; and when the external microphone is not electrically coupled to the apparatus via the microphone input, the second signal has a second state indicating the absence of the external microphone and the first audio signal comprises information from the DVD/CD reader. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method to amplify an output of an apparatus, comprising:
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determining whether an external microphone is electrically coupled to an microphone input terminal of the apparatus; in response to determining that the apparatus is in a first mode of operation in which the external microphone is not electrically coupled to the microphone input terminal of the apparatus; providing a first signal to a configurable amplifier circuit, including decoding information received from a DVD or CD reader to produce a first audio signal, the first signal including the first audio signal; configuring the configurable amplifier circuit in accordance with a second signal, the second signal having a value corresponding to the first mode of operation; using a programmed processor, controlling an MPEG decoder to perform the decoding; and amplifying the first signal with the configurable amplifier circuit to produce an output signal; and in response to determining that the apparatus is in a second mode of operation in which the external microphone is electrically coupled to the microphone input terminal of the apparatus; providing a third signal to a configurable amplifier circuit, including decoding information received from the DVD or CD reader to produce the first audio signal and receiving an output from the microphone unit comprising a second audio signal, the third signal including a combination of the first audio signal and the second audio signal; configuring the configurable amplifier circuit in accordance with the second signal, the second signal having a value corresponding to the second mode of operation; using the programmed processor, controlling the MPEG decoder to perform the decoding; and amplifying the third signal with the configurable amplifier circuit to produce the output signal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification