Communication system using short range radio communication headset
First Claim
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1. A short range radio communication headset, comprising:
- a transmitter configured to transmit or receive signals by short range radio communications;
an external sound detection microphone configured to detect direct sounds propagated from an external;
a speech processing unit configured to receive inputs of received signals received by the transceiver and the direct sounds detected by the external sound detection microphone, and selectively control a ratio between the received signals and the direct sounds; and
a speaker configured to output speeches with the ratio controlled by the speech processing unit,wherein the speech processing unit comprises a unit configured to detect whether an emergency ID signal is attached to the received signals of the transceiver or not, and the speech processing unit does not reduce a ratio of the received signals when the emergency ID signal is attached to the received signals.
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Abstract
In a short range radio communication headset, signals transmitted by the short range radio communications are received while direct sounds propagated from an external are detected. Then, a digital signal adaptation processing using either received signals or the direct sounds as reference signals are applied, and a ratio between the received signals and the direct sounds is controlled by correlating the reference signals and another one of the received signals and the direct sounds that are not used as the reference signals and extracting necessary components.
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Citations
13 Claims
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1. A short range radio communication headset, comprising:
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a transmitter configured to transmit or receive signals by short range radio communications; an external sound detection microphone configured to detect direct sounds propagated from an external; a speech processing unit configured to receive inputs of received signals received by the transceiver and the direct sounds detected by the external sound detection microphone, and selectively control a ratio between the received signals and the direct sounds; and a speaker configured to output speeches with the ratio controlled by the speech processing unit, wherein the speech processing unit comprises a unit configured to detect whether an emergency ID signal is attached to the received signals of the transceiver or not, and the speech processing unit does not reduce a ratio of the received signals when the emergency ID signal is attached to the received signals. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A short range radio communication headset comprising:
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a transmitter configured to transmit or receive signals by short range radio communications; an external sound detection microphone configured to detect direct sound propagated from an external; a speech processing unit configured to receive inputs of received signals received by the transceiver and the direct sounds detected by the external sound detection microphone, and selectively control a ratio between the received signals and the direct sounds; and a speaker configured to output speeches with the ratio controlled by the speech processing unit, wherein the speech processing unit has; an A/D converter configured to convert the direct sounds into digital signals; an adaptation processing unit configured carry out an adaptation processing using either the received signals of the transceiver or the digital signals converted from the direct sounds as reference signals; and a correlation processing unit configured to extract desired components by correlating the reference signals with another one of the received signals of the transceiver or the digital signals converted from the direct sounds that are not used as the reference signals, and wherein the speech processing unit has a first mode for outputting the received signals of the transceiver in a reinforced form, and a second mode for outputting the direct sounds in a reinforced form, as obtained by the correlation processing unit, and the short range radio communication headset further comprises a mode changing switch for switching the first mode and the second mode. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification