| 摘要 |
THE GENERATION OF AN AUDIO OUTPUT SOUND FROM AN ELECTRONIC COMMUNICATIONS DEVICE INCLUDES MONITORING A LEVEL OF AN ELECTRICAL POWER SUPPLY (VBAT) FOR THE ELECTRICAL COMMUNICATIONS DEVICE, AND ADJUSTING AN AUDIO INPUT SIGNAL RESPONSIVE TO CHANGES OF THE LEVEL OF THE ELECTRICAL POWER SUPPLY (VBAT) FOR THE ELECTRONIC COMMUNICATIONS DEVICE. THE ADJUSTED AUDIO INPUT SIGNAL IS AMPLIFIED, AND AN OUTPUT SOUND IS GENERATED RESPONSIVE TO THE ADJUSTED AND AMPLIFIED AUDIO INPUT SIGNAL. IN ADDITION, AN AUDIO OUTPUT SIGNAL CAN BE GENERATED RESPONSIVE TO RECEIVED SOUND INCLUDING AN ECHO (49) OF THE OUTPUT SOUND, AN ESTIMATE OF THE ECHO (49) OF THE OUTPUT SOUND CAN BE GENERATED USING THE ADJUSTED AUDIO INPUT SIGNAL AND A MODEL OF AN ECHO PATH OF THE OUTPUT SOUND, AND THE ECHO PORTION OF THE AUDIO OUTPUT SIGNAL CAN BE REDUCED USING THIS ESTIMATE. (FIGURE 1)
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