JP2001257745A - Mobile phone with background tone recording reproducing function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile phone that can itself record a background tone for a so-called alibi. SOLUTION: The mobile phone is provided with a voice coder 18 for recording and reproducing and an adder 17, transmits a background tone during a speech under the control of switches 12 and 13 and records the background tone from a transmitter 16. Thus, a user records it immediately on the spot when encountering a proper background tone and can use it for the background tone.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone capable of transmitting a background sound during a conversation.

[0002]

2. Description of the Related Art As a telephone with an alibi function capable of transmitting a signal reproduced from a recording / reproducing device provided in a telephone as a background sound during a call, for example, Japanese Patent Application Laid-Open Nos. 9-32684
No. 6 is shown. In addition, for mobile phones,
An answering machine function using a recording / reproducing device installed at the recording center in case radio waves do not reach, and a recording / reproducing device installed on a mobile phone, so that recording and A function is provided for recording the contents of a call in a memo during a call.

[0003]

However, the telephones with the alibi function disclosed in Japanese Patent Application Laid-Open Nos. 63-184449 and 9-326846 are both fixed telephones, and are reproduced and transmitted as background sound. The recorded signal is assumed to be recorded by a recording device separate from the telephone. Therefore, when a sound source suitable for the background sound is found, it is not always possible to immediately record the sound source, and there has been an inconvenience of bringing a recording device to the place at another occasion and recording. Further, the recording / reproducing apparatus installed at the recording center for the answering machine function of the mobile phone is for use when radio waves do not reach, and has no background sound transmission function. Also, even when a recording / reproducing device is installed in a mobile phone, it is for temporarily recording a call, and it has not been considered to transmit a background sound.

An object of the present invention is to provide a recording / reproducing apparatus,
The background sound can be easily recorded from the transmitter, so that the background sound can be recorded immediately when an appropriate sound source is encountered, and the recorded background sound is superimposed on the call. It is an object of the present invention to provide a mobile phone with a background sound recording / reproducing function which can be transmitted.

[0005]

In order to achieve the above object, the present invention provides a memory for recording a voice band signal, a recording means for recording a voice band signal from a transmitter in the memory, Reproducing means for reproducing the audio band signal recorded in the memory, synthesizing means for synthesizing the audio band signal reproduced by this means and the audio band signal from the transmitter, and transmitting the synthesized audio band signal to a radio signal And a transmission control means for controlling transmission of the background sound.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an example of the configuration of a portable telephone having a background sound recording / reproducing function according to the present invention.
FIG. 1 shows only blocks necessary for recording a background sound and transmitting the background sound, and omits each block such as an antenna, a radio transceiver, a receiver, and a PCM decoder which are used for ordinary mobile phone communication. I have. The radio unit control unit 10 performs control for converting a digital signal in a voice band into a predetermined radio frequency and transmitting the signal. The audio signal processing encoder 11 compresses and encodes a digital signal in an audio band into a signal suitable for a wireless system. The switch 12 is a switch for switching between normal transmission and transmission with background sound.
Is a switch for selecting whether to record a voice band signal from the transmitter 16. The analog signal in the voice band is input from the transmitter 16, amplified by the amplifier 15, encoded by the PCM encoder 14, and becomes a PCM digital signal. P
The output of the CM encoder 14 is connected to switches 12 and 13. The terminal b of the switch 13 is connected to the adder 17, and the terminal c is connected to the compression unit 19 of the speech encoder 18. The voice encoder 18 compresses the PCM digital signal by the compression unit 19 to reduce the amount of stored data, and the memory storage control unit 21 stores the data in the memory 22. Further, the memory storage control unit 21 reads out the data in the memory 22, decompresses the data compressed by the decompression unit 20 of the audio encoder 18, and inputs the data as an original PCM digital signal to the adder 17. The adder 17 adds the PCM digital signal from the transmitter 16 and the PCM digital signal from the decompression unit 20 which is a background sound, and sends the result to the switch 12. The CPU 23 monitors the key 24, identifies whether the key is pressed, and controls the switches 12, 13 and the memory storage controller 21.

Hereinafter, the operation will be described. In the case of a normal call that does not transmit background sound, the CPU 23 connects the terminal a and the terminal b of the switch 12 (shown by a solid line in FIG.
3 disconnects the terminal a from the terminal b (shown by a solid line in the figure). In this state, the user's voice is input from the transmitter 16, amplified by the amplifier 15, and converted into a PCM digital signal by the PCM encoder 14. This digital signal is compressed into a digital signal suitable for a wireless system by the audio signal processing encoder 11 via the contacts a and b of the switch 12, and the wireless controller 1
It is transmitted from the wireless channel under the control of 0.

When the user wants to transmit a background sound, the user inputs a request for transmitting a background sound from the key 24. The background sound transmission request is made by a combination of a function key on the key 24 and a numeric key. For example, a function key and “1” are input. The CPU 23 constantly scans the input from the key 24, and displays a background sound selection screen on the display unit 25 when detecting that the key input of the background sound transmission request has been performed. The background sound selection screen is displayed in the memory 22
When a plurality of background sound data is stored in the, the user is required to specify which background sound is to be used. FIG. 2 shows an example of the background sound selection screen. The figure shows the case where the background sound includes the sound of a wave, the voice of a bird, the prayer of a music maiden, and the sound inside a jazz coffee shop. Now, assuming that the user selects a wave sound as the background sound, the user inputs the number “1” of the background sound of the wave sound from the key 24. When the background sound to be used is selected, the CPU 23 disconnects the contacts a and b of the switch 12 and connects the contacts a and c (shown by a dotted line in the figure). The switch 13 also connects the contacts a and b (shown by dotted lines in the figure). At the same time, the CPU 23
1 is read, and the background sound data selected by the user recorded in the memory 22 is read out, and the expansion unit 20 of the voice encoder 18 compresses and stores the background sound stored in the original PCM digital signal. And add it to the adder 17.

In this state, when the user inputs a voice signal from the transmitter 16, the voice is amplified by the amplifier 15, and
The signal is encoded into a PCM digital signal by the PCM encoder 14 and is applied to the adder 17 via the contacts a and b of the switch 13. In the adder 17, the background sound (PCM
The digital signal) and the user's voice (PCM digital signal) from the PCM encoder 14 are added to the audio signal processing encoder 11 via the contacts c and a of the switch 12, and the user's voice with background sound is added. The PCM digital signal is compressed into a digital signal suitable for a wireless system, and transmitted from the wireless channel by the wireless unit control unit 10. In this way, a call with a background sound can be made.

Next, the case where the background sound is recorded from the transmitter 16 will be described. When the user wants to record a background sound, the user makes a background sound recording request from the key 24. The background sound recording request can be made, for example, by a combination of a function key and a numeric key. For example, this is performed by inputting a function key and a number “2”. When detecting that a background sound request has been made from the key 24, the CPU 23 displays a background sound recording screen on the display unit 25. On the background sound recording screen, the recording number and name of the background sound already recorded are displayed together with the area number of the background sound in the memory 22 (same as the recording number at the time of reproduction). The user inputs the recording area number and name of the background sound to be recorded. For example, when recording the sound of a wave, it is convenient to input "Naminooto" or the like for reproduction. If you want to record a new recording, you can select a new number and enter a name, but if there is no free memory area, select a recording number of the area that has already been recorded and a new recording Will be done. When the recording area number and name of the background sound are input, the CPU 23 displays on the display unit 25 that recording is in progress, connects the contacts a and c of the switch 13, drives the memory storage control unit 21, and The output data of the compression unit 19 of the audio encoder 18 can be stored. In this state, the signal in the voice band input from the transmitter 16 is amplified by the amplifier 15 and
Encoded into M digital signals. This PCM digital signal passes through the contacts a and c of the switch 13 and
8 is compressed into data to be stored in the memory, and is stored in the area of the recording area number selected by the user in the memory 22 by the memory storage control unit 21.

In the description of FIG. 1, the switches 12 and 13 are used to switch between a normal call and a call with a background sound, and to record the background sound. However, a configuration not using these switches is also possible. Switch 12, 1
FIG. 3 shows a connection configuration in the case of not using 3. In FIG. 3, P
The output of the CM encoder 14 is directly supplied to the adder 17 and the speech encoder 1
The output of the adder 17 is directly connected to the speech signal processing encoder 11. Even in the case of a normal call without adding a background sound, the call is made via the adder 17. However, in the normal call, the memory storage control unit 21 does not read out the background sound data from the memory 22, so that the voice encoder 18 is used. Since there is no output from the decompression unit 20, the adder 1
The output of 7 is only the output of the PCM encoder 14. When the user selects to add the background sound to the call, the memory storage control unit 21 reads the data of the background sound from the memory 22, outputs the data from the expansion unit 20 of the speech encoder 18, and outputs the data to the adder 1.
The output of 7 is a signal obtained by adding the background sound to the output of the PCM encoder 14. When recording background sounds, the PCM encoder 1
Although the output of 4 is always applied to the compression unit 19 of the speech encoder 18, the memory storage control unit 21 stores the compressed data in the memory 21 only when the user selects recording. As described above, the same control can be performed without using the switches 12 and 13 under the control of the memory storage control unit 21.

[0012]

The present invention has the following effects. (1) A call with a background sound can be made on a mobile phone. (2) Since a sound source suitable for the background sound can be recorded immediately when the sound source is met, abundant background sounds can be collected. (3) Since the background sound can be recorded at the place where the mobile phone has actually experienced, it is possible to transmit the background sound using the data of the place where the mobile phone was actually operated, and the function as the telephone with alibi is high.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a mobile phone with a background sound recording / playback function according to the present invention.

FIG. 2 is an example of a background sound selection screen.

FIG. 3 is a block diagram of the telephone with a background sound recording / playback function according to the present invention when a changeover switch is not used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Radio | wireless part control part 11 audio signal processing encoder 12, 13 switch 14 PCM encoder 15 amplifier 16 transmitter 17 adder 18 audio encoder 19 compression part 20 expansion part 21 memory storage control part 22 memory 23 CPU 24 key 25 Display

Claims (1)

[Claims] 1. A memory for recording an audio band signal, a recording unit for recording an audio band signal from a transmitter in the memory, a reproducing unit for reproducing the audio band signal recorded in the memory, and this unit. And a transmission control means for controlling the transmission of the synthesized voice band signal as a radio signal. Mobile phone with background sound recording and playback function.