| 摘要 |
PURPOSE:To suppress a beep sound, and to obtain an optimal voice output corresponding to a voice broadcasting mode the number of speakers to be used by operating the fade-out of voice data by a soft mute means by using an output selection control signal delayed by a delay means, and changing a digital voice data processing. CONSTITUTION:In a data processing part 101 for an analog voice, when a voice broadcasting mode signal is changed, the fade-out of the voice data introduced from a voice broadcasting mode signal transition detecting means 17 to a speaker selecting means 12 is operated by a soft mute means 9, and the output mode of a channel number converting means 8 or a speaker electing means 12 is switched by a control signal from an initializing means 3. Afterwards, the fade-in of the voice data is operated again. On the other hand, in a data processing part 102 for a digital voice, the soft mute means 9 is controlled so that the fade-out can be operated. A delay means 4 delays the control signal from the initializing means 3 by a mute state detecting means 16, and the signal processing of the channel number converting means 8 and the speaker means 12 is operated. |
