JP2000106593A - Portable telephone system utilized also as stereophonic set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a user recognize naturally an incoming call even while he is listening to the music via a stereophonic set by fading out the acoustic signals and also fading in the voice signals in a talking start mode and controlling the volume of acoustic signals to fade in a talking end mode. SOLUTION: When the incoming signals of a call are received while a user is listening to the headphone acoustic signals, a CPU 6 gradually controls the level of an electronic volume 4 from a level A down to a level C to fade out the sound volume. Meanwhile, the voice signals are faded in by raising gradually the level of the volume 4. On the contrary, the CPU 6 gradually increases the sound volume of the volume 4 to the level A from the level C to supply the acoustic signals from an AUX device 5 via an Lch and an Rch when the talking ends through a telephone circuit. That is, the sound volume is faded in.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereo-compatible portable telephone device having a headphone type receiver capable of listening to an audio signal as a headphone stereo.

[0002]

2. Description of the Related Art A technique for explaining a conventional stereo-compatible portable telephone device is disclosed in Japanese Patent Application Laid-Open No. 4-46454. In this publication, a portable telephone has a switching device for switching between an audio signal of the telephone and an audio signal from an audio device. When the telephone is not used, the audio signal from the audio device is listened to by a headphone. When the user goes off-hook to place a call, the switching device listens to the audio signal of the telephone through headphones.

[0003]

In such a conventional stereo-compatible portable telephone device, when a telephone is not used by a switching device for switching between a voice signal of a telephone and a voice signal from an audio device, the voice from the audio device is not used. When listening to a signal with headphones, when a call is received or when the user goes on-hook to make a call, the switching device uses the headphones to listen to the audio signal of the phone, so the user may feel uncomfortable when switching. .

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and is intended to listen to an audio signal from an audio device when not using a telephone and to receive a telephone call or make a telephone call. When the telephone is switched off from the audio signal to the audio signal, the audio signal is faded out and the audio signal is faded in at the start of the call. The present invention provides a stereo-compatible mobile phone device provided with a volume adjusting means for adjusting the volume of an audio signal so that the audio signal is faded in at the end of a call that switches from the audio signal to the audio signal.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a stereo / mobile phone device in which an electronic volume according to a first embodiment of the present invention is built in a telephone, and FIG. 2 is a block diagram of an electronic volume according to a second embodiment of the present invention. FIG. 3 is a block diagram of an externally provided mobile phone with a stereo function.
In FIG. 1, 1 is a headphone, 2 is a mobile phone or PHS, and 3 is an audio circuit.
4 is an electronic volume (Volume), 5 is an AUX device, 6
Is a CPU, 7 is a detection circuit, 8 is an electronic volume 4, CP
U6 and a conversion device including a detection circuit 7.

The operation will be described with reference to FIG. Here, when an audio signal flows from the AUX device 6 through the Lch and Rch, the audio signal is transmitted to the mobile phone or the PHS2.
The sound is heard by the headphones according to the level of the electronic volume 4 built in. When receiving an incoming call signal from the outside while listening to the acoustic signal, the CPU 6 controls the volume level of the electronic volume 4 to gradually decrease from A to C, thereby performing a fade-out process of the volume level. ing. In addition, the audio signal performs fade-in processing by gradually increasing the level of the electronic volume 4.

[0007] Conversely, when a call is completed through a telephone line, the AUX device 6 terminates the call.
To listen to the audio signal through Lch and Rch from
U6 controls the volume level of the electronic volume 4 to gradually increase from C to A. That is, the volume level is subjected to fade-in processing. Further, by providing a mixer function, it is possible to use an audio signal from the AUX device 6 as background music during a call. The operation will be described with reference to FIG. 1 are given the same reference numerals. FIG. 2 realizes the same function as FIG. 1, except that the electronic volume 4 is provided outside the mobile phone or the PHS 2.

[0008]

As described above, the present invention fades out the audio signal at the start of a call in which an audio signal is switched to an audio signal, fades in the audio signal at the same time, and fades out the audio signal when the audio signal is switched to an audio signal. By providing a volume adjusting means for adjusting the volume of the audio signal so that the audio signal is turned on, even if a call is received while listening to music with headphones, the user can notice without discomfort. Furthermore, after the call is over, the music that was being listened to before the call can be continuously and smoothly heard.

[Brief description of the drawings]

FIG. 1 is a block diagram of a stereo / mobile phone device in which an electronic volume is built in a telephone according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a stereo / mobile phone device according to a second embodiment of the present invention, in which an electronic volume is provided outside a telephone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Headphone (Head Phone) 2 Cellular phone or PHS 3 Audio circuit (Audio circuit) 4 Electronic volume (Volume) 5 AUX equipment 6 CPU 7 Detection circuit 8 Conversion device

Claims (1)

[Claims] 1. A dual-purpose stereo device capable of listening to an audio signal from an audio device when the telephone is not in use, and listening to the audio signal of the telephone by a switching device when a telephone call is received or when the user goes off-hook to make a telephone call. In a mobile phone device, an audio signal is faded out at the same time as a speech signal is switched out from an audio signal to a voice signal, and the audio signal is faded in at the same time. And a volume adjusting means for adjusting the volume of the mobile phone.