Method and apparatus for providing a sidetone in a wireless communication device
First Claim
Patent Images
1. A method of operating a wireless communication device comprising:
- converting an outbound analog audio signal to an outbound audio bitstream in a first path that includes a transmitter which transmits the outbound audio bitstream;
converting an inbound digital audio signal to an inbound audio bitstream in a second path that includes a receiver which receives the inbound digital audio signal;
extracting a sidetone bitstream from the outbound audio bitstream; and
supplying the inbound audio bitstream and the sidetone bitstream to a filter in the second path, the filter adding the sidetone bitstream to the inbound audio bitstream to produce a resultant signal, the filter also filtering the resultant signal to provide an analog audio signal with sidetone.
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Abstract
A wireless communication device is disclosed that provides a sidetone to the device user. The device converts an outbound analog audio signal to an outbound audio bitstream from which a sidetone bitstream is extracted. The device also converts an inbound digital audio signal to an inbound audio bitstream. A filter in the device both adds the sidetone bitstream to the inbound audio bitstream and filters the resultant added bitstreams to provide an analog audio signal with sidetone.
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Citations
31 Claims
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1. A method of operating a wireless communication device comprising:
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converting an outbound analog audio signal to an outbound audio bitstream in a first path that includes a transmitter which transmits the outbound audio bitstream;
converting an inbound digital audio signal to an inbound audio bitstream in a second path that includes a receiver which receives the inbound digital audio signal;
extracting a sidetone bitstream from the outbound audio bitstream; and
supplying the inbound audio bitstream and the sidetone bitstream to a filter in the second path, the filter adding the sidetone bitstream to the inbound audio bitstream to produce a resultant signal, the filter also filtering the resultant signal to provide an analog audio signal with sidetone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wireless communication device comprising:
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a transmitter situated in an outbound path;
a receiver situated in an inbound path;
an analog to digital converter (ADC), situated in the outbound path, that converts an outbound analog audio signal to an outbound audio bitstream that is supplied to the transmitter;
a digital to analog converter (DAC), situated in the inbound path, that converts an inbound digital audio signal, received by the receiver, to an inbound audio bitstream; and
a filter, situated in the inbound path and coupled to the DAC to receive the inbound audio bitstream, the filter being further coupled to the outbound path to receive the outbound audio bitstream, the filter adding the outbound bitstream as a sidetone to the inbound audio bitstream to produce a resultant signal, the filter also filtering the resultant signal to provide an analog audio signal with sidetone. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An integrated circuit device comprising:
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a transmitter situated in an outbound path;
a receiver situated in an inbound path;
an analog to digital converter (ADC), situated in the outbound path, that converts an outbound analog audio signal to an outbound audio bitstream that is supplied to the transmitter;
a digital to analog converter (DAC), situated in the inbound path, that converts an inbound digital audio signal, received by the receiver, to an inbound audio bitstream; and
a filter, situated in the inbound path and coupled to the DAC to receive the inbound audio bitstream, the filter being further coupled to the outbound path to receive the outbound audio bitstream, the filter adding the outbound bitstream as a sidetone to the inbound audio bitstream to produce a resultant signal, the filter also filtering the resultant signal to provide an analog audio signal with sidetone. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A wireless communication device comprising:
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an analog to digital converter (ADC) that converts an outbound analog audio signal to an outbound audio bitstream;
a transmitter, coupled to the ADC, that transmits the outbound audio bitstream;
a receiver that receives an inbound digital audio bitstream;
a digital to analog converter (DAC), coupled to the receiver, that converts the inbound digital audio signal to an inbound audio bitstream; and
a filter, coupled to the ADC and the DAC, the filter both adding the outbound bitstream as a sidetone to the inbound audio bitstream to produce a resultant signal and also filtering the resultant signal to provide an analog audio signal with sidetone. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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Specification