JP2001197168A - Portable telephone set and portable telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable telephone set having a KARAOKE function and further having a scoring function and to provide a portable telephone system, with which the result of scoring is transmitted to a control center and accumulated, and the accumulated result can be watched by the portable telephone set. SOLUTION: A portable telephone system 100 is composed of a center 110, a communication network 120 and a portable telephone set 1. The center 110 stores music data and distributes the music data to the portable telephone set 1. The portable telephone set 1 has the singing scoring function of KARAOKE and sends the scoring data of a user to the center 110. The center 110 stores the received scoring data and performs data working such as accumulation or ranking decision. Then, the worked data are provided corresponding to a request from the portable telephone set 1 or in the interval of a fixed period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a portable telephone having a karaoke function and a portable telephone system using the same.

[0002]

2. Description of the Related Art Hitherto, karaoke apparatuses have been widely used in restaurants and homes. In order to make the karaoke apparatus more fun, a karaoke apparatus having a singing ability scoring function has been developed. However, this type of conventional karaoke apparatus with a scoring device merely displays the scoring result, and has the drawbacks that it is not interesting and does not lead to much improvement in singing ability. On the other hand, in recent years, a mobile phone has been widely used, and since this mobile phone has a microphone and a speaker, a mobile phone having a karaoke function added thereto has been developed. However, this type of conventional mobile phone merely has a karaoke function, and no mobile phone with a scoring function has been developed.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a portable telephone having a karaoke function and a scoring function. It is another object of the present invention to provide a mobile phone system capable of transmitting and totaling scoring results to a management center and viewing the tally results on a mobile phone.

[0004]

In order to solve the above-mentioned problems, according to the present invention, a communication section for performing transmission and reception with a base station by radio and a communication section with the outside via the communication section are provided. In a mobile phone provided with a communication means for making a call, a music data storage means for storing music data, a music reproduction means for reproducing music data stored in the music data storage means to generate music, and a microphone Synthesizing means for synthesizing the audio signal input from the oscilloscope and the output of the music reproducing means, sounding means for generating a signal generated by the synthesizing means, and scoring for singing ability based on the audio signal input from the microphone. Means, and display means for displaying the result of the scoring by the scoring means.

[0005] Further, the invention according to claim 2 is based on claim 1.
3. The mobile phone according to claim 1, further comprising a transmitting unit that transmits a result of the scoring by the scoring unit to a predetermined organization via the communication unit. According to a third aspect of the present invention, in the mobile phone according to the first or second aspect, the scoring unit determines a pitch and a volume extracted from an audio signal input from the microphone by the music reproducing unit. It is characterized by scoring by comparing with parameters extracted from the output.

[0006] The invention according to claim 4 is based on claim 1.
Alternatively, in the mobile phone according to claim 2, the scoring means scores by comparing a pitch and a volume extracted from an audio signal input from the microphone with a scoring reference parameter supplied from outside. I do. According to a fifth aspect of the present invention, there is provided the mobile phone according to any one of the first to fourth aspects, further comprising an FM transmitting means for FM-modulating and transmitting an output signal of the synthesizing means. It is characterized by.

[0007] The invention according to claim 6 is the invention according to claim 2.
And the scoring result transmitted from the mobile phone is received and stored in an internal storage unit, and data in the storage unit or data obtained by processing the data in response to a request from the mobile phone. And a communication network for connecting the data distribution center and the mobile phone and transmitting information. According to a seventh aspect of the present invention, in the mobile phone system according to the sixth aspect, the data distribution center comprises:
It has a plurality of music data, and transmits the music data to the mobile phone in response to a request from the mobile phone.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a mobile phone system 100 according to an embodiment of the present invention. Referring to FIG.
Is composed of a music data distribution / scoring data management center (hereinafter, referred to as a center) 110, a communication network 120, and the mobile phone 1. The center 110 distributes music data for karaoke, stores the user's scoring data input from the mobile phone 1, and processes the data such as totaling the stored scoring data and determining the weekly ranking, and the scoring data and The processed data is transmitted to the mobile phone 1.

The configuration of the communication network 120 shows an example of a public communication line and a cellular system. The mobile phone 1 and the base station 124c that manages the wireless zone to which the mobile phone 1 belongs are connected by a wireless line. Signals for making a call from the mobile phone 1 and for performing location registration are received and processed by the base station 124c. Base station 1
24a to 124d manage different wireless zones. The base stations 124a to 124d are connected to a mobile switching center 123 via a multiplex line, and a plurality of mobile switching centers are concentrated at a gateway switching center 122 to form a telephone switching center 121b.
Connected to Telephone exchange 1 installed in each region
21a to 121c are connected to each other via a relay transmission line to form a communication network. The above-mentioned center 110 is connected to the telephone exchange 121a via a subscriber line.

FIG. 2 is a block diagram showing the configuration of the mobile phone 1. As shown in FIG. The mobile phone 1 will be described in detail with reference to FIG. In FIG. 1, a mobile phone 1 generally includes a retractable antenna 1a, a communication unit 13 that performs wireless transmission / reception with a base station 124c, and encodes audio input from a microphone 21 or decodes an input digital signal. A voice processing unit 14, a music reproduction unit 15 that reproduces music data and forms a ringtone, and a scoring parameter extraction unit 25 that scores a singer's singing ability and outputs a score.
, A RAM (random access memory) 11 for data storage, a ROM (read only memory) 12 for storing a communication program and the like, and an interface (I / F) for inputting data from an external device 20 such as a personal computer. ) 1
6, an input unit 17 for inputting a telephone number and a function selection, a display unit 18 having a liquid crystal display panel, a vibrator 19 for notifying an incoming call by vibration, and a weak signal for FM-modulating a supplied signal and transmitting the signal from an antenna 27. It comprises a power FM transmitter 26 and a CPU (Central Processing Unit) 10 for controlling the activation of a communication program and the operation of each unit.
Each unit is connected to the CPU 10 by a bus 24.

The above configuration will be further described.
Reference numeral 3 denotes a base station 124 which transmits a radio signal modulated by a digital signal input from the audio processing unit 14 via the antenna 1a.
c. Also, it demodulates the received wireless signal via the antenna 1a and outputs a digital signal. The modulation and demodulation method uses QPSK to improve the radio frequency utilization rate.
(Four-phase modulation) or the like is used. When the TDD (time division two-way communication) method is used, transmission and reception are performed by time division using the same frequency for transmission and reception.

The RAM 11 has a user setting data storage area, a work area for the CPU 10, a center 11
A storage area for music data downloaded from 0 is set. The ROM 12 stores programs such as a communication program for outgoing / incoming processing executed by the CPU 10 and a processing for assisting music reproduction processing. Input unit 1
Numeral 7 is an input means comprising a numeric keypad consisting of numerical keys and code keys, a jog dial and the like. In addition to operations for ordinary telephone calls, operation inputs such as music data distribution request, scoring data transmission, karaoke mode ON / OFF, music number selection, music reproduction start / stop, and the like can be performed. The display unit 18 displays a menu of a telephone function, a display corresponding to button operation of a numeric keypad, a jog dial, and the like, lyrics of the music, graphics, a score result, and the like.

Next, the music reproducing section 15 and the audio processing section 1
4 shows a detailed configuration example of FIG. First, the music reproducing unit 15
Will be explained. In the figure, the interface (I /
F) 30 is an interface for sending and receiving various data via the bus 24. At the time of music data initial setting performed before music reproduction, music data other than the tone data of the music data input via the I / F 30 is stored in the write / read controller (R / W controller) 31. The music data is stored in an empty area of the music data storage unit (RAM) 32 under control. The storage capacity of the RAM 32 is smaller than the storage capacity required to store music data for one song, and is, for example, a storage capacity capable of storing music data for 32 words. Therefore, the first 32 words of the music data are stored.

The timbre data in the music data is Voi
The ce RAM (sound color data storage unit) 36 supplies and stores the data. The Voice RAM 36 has a storage capacity capable of storing tone data for a plurality of tone colors. The timbre data includes a waveform parameter, an envelope parameter, a modulation parameter, an effect parameter, and other parameters, and each parameter is a parameter unique to each timbre. The waveform parameter in each timbre data indicates a musical tone waveform corresponding to the timbre.
When the sound source is a sound source, the parameter is a parameter indicating one of the waveforms in the waveform table. When the sound source unit 34 is an FM sound source, the parameter is a parameter indicating an algorithm for FM calculation. The above envelope parameters are
Attack rate, decay rate, sustain level,
The modulation parameter is a parameter of the depth or speed of vibrato or tremolo, and the effect parameter is a parameter of reverb, chorus, variation, or the like.

In response to a read request signal (Req) from the sequencer 33, the R / W controller 31
Sequencer 33 takes in the tempo data read from 32 and sets the tempo. Furthermore, the sequencer 33
Interprets the music data, applies a tone color number designated for each part to the Voice RAM 36, reads out tone color parameters corresponding to the tone number from the Voice RAM 36, and sets them in the tone generator 34.

When music playback is started, the R / W controller 31 sends a read request signal (R
In accordance with eq), music data is sequentially read from the RAM 32 and supplied to the sequencer 33. Sequencer 33
Receives the music data sequentially from the R / W controller 31, interprets the music data, and sets a sound source parameter corresponding to the music data in the sound source unit 34 so that the music data is generated at the sound generation timing. The sound source parameters include pitch data, note on / off signals, and the like.

The tone generator 34 can simultaneously generate tone signals of a plurality of parts of the left and right channels, and the tone of the tone signals of each part is set to the tone read from the Voice RAM 36. And generates tone data for each part based on tone generator parameters supplied from the sequencer 33. The generated tone data for a plurality of parts is supplied to a digital / analog converter (DAC) 35 and converted into an analog tone signal.

When reading of music data from the RAM 32 progresses and a predetermined amount of free space is generated in the RAM 32, the R / W controller 31 sends a transfer request signal (Req) via the interface 30. To the bus 24. Upon receiving the transfer request signal, the CPU 10 stores the following music data in predetermined data, for example, 16 words of music data corresponding to an empty area in RAM 11.
And sends it out to the bus 24. The music data is written to an empty area of the RAM 32 under the control of the R / W controller 31 via the I / F 30.
By repeating such an operation, the RAM 3
Even if the storage capacity of No. 2 is smaller than the storage capacity required to store music data for one music piece, the entire music piece can be reproduced.

When the reproduced music is emitted,
The coefficient of the coefficient multiplier 40 is set to “1”, mixed with the audio signal input from the microphone 21 in the mixer 51, and emitted from the speaker 23. When the output of the DAC 35 is a ring tone, the coefficient of the coefficient multiplier 54 is “0”.
And only the ringtone is emitted from the speaker 23. If the reproduced tone signal is a hold tone, the coefficient of the coefficient multiplier 37 is set to “1” and output from the receiving speaker 22 via the mixer 38. In this case, the coefficient of the coefficient multiplier 50 is set to “0”, and the output of the DAC 49 is not supplied to the mixer 38. In this case, the tone signal output from the sound source unit 34 is supplied to the audio processing unit 14 as a transmission hold sound signal.

Next, the audio processing unit 14 will be described. In the voice processing unit 14 shown in FIG.
The audio signal input from the microphone 21 is converted into a digital signal in an analog / digital converter (ADC) 42 and supplied to a mixer 44 via a coefficient multiplier 43.
The tone signal for BGM reproduced by the music reproducing unit 15 is supplied to the mixer 44 via the coefficient multiplier 45. The output of the mixer 44 is encoded by the coder 46 and
3 is supplied.

The coder 46 and the decoder 48 are provided with high-efficiency compression encoding / decoding using a band compression technique, for example, ADPCM (adaptive differential PC) in order to extend the number of multiplexed voices.
M) and CELPC (Code Excited LP)
C) method or the like is used. The signal input from the communication unit 13 is decoded by a decoder 48, further converted into an analog reception signal by a digital / analog converter (DAC) 49, and supplied to the music reproduction unit 15. On the other hand, when a key operation for designating the karaoke mode of the input unit 17 is performed, the coefficient of the coefficient multiplier 54 is set to “1” and the microphone 2
The singer's voice signal input from 1 is supplied to the mixer 51 via the coefficient multiplier 54 and mixed with the reproduced music (accompaniment sound).

Next, the scoring parameter extracting unit 25 will be described with reference to FIG. First, the singer's voice signal output from the microphone 21 (FIG. 3) and the reproduced tone signal (output of the DAC 35) are input to the preprocessing unit 61.
The pre-processing unit 61 passes the input audio signal through a filter in an audio band, removes high-frequency and low-frequency noises, and outputs the singer's voice signal. The pre-processing unit 61 extracts a model vocal sound signal from the input musical sound signal. That is, in the case of the audio multiplexing method, accompaniment is recorded in the left channel signal, and accompaniment and audio are recorded in the right channel signal. Therefore, the pre-processing unit 61
Extracts the audio signal by subtracting the left channel signal from the right channel signal. Next, the extracted audio signal is passed through a filter in an audio band to remove high-frequency and low-frequency noise, and output as a model vocal audio signal.

The pitch extracting unit 62 first extracts a pitch from each of the singer voice signal and the sample vocal voice signal supplied from the preprocessing unit 61. As a method of extracting the pitch, a well-known zero-crossing interval detection method, an autocorrelation method, or a combination thereof can be used. After the pitch-extracted audio signals have their vibrato components removed by a low-pass filter, they are converted to pitch data.

That is, the frequency f, which is the reciprocal of the extracted pitch, is expressed by the following equation as a deviation from the fundamental frequency of 32.7032 Hz. f = 32.7032 × 2 ^{(P + Q / 12)} [Hz] (1) Here, P is octave data, and Q is chromatic scale data. Therefore, the pitch data is calculated based on the following equation. P + (Q / 12) = log ₂ (f / 32.7032) (2) The octave data P is an integer and is determined so that the absolute value of Q is minimized. The reason why the pitch data is converted into pitch data is that a comparison matching the auditory characteristics can be performed. Then, the singer's pitch data and the model vocal pitch data obtained by the above-described processing are output to the scoring unit 64, respectively.

The volume extracting section 63 converts the amplitude values of the input singer voice signal and the sample vocal voice signal into absolute values, and further smoothes the amplitude values to generate volume data.
The data is output to the scoring unit 64 as singer volume data and sample vocal volume data. The scoring unit 64 compares the input singer's pitch data and the model vocal pitch data based on a fixed period or a comparison timing signal based on a pitch extracted from the reproduced voice signal. Then, if they substantially match, the counter counts up and calculates the degree of coincidence of the pitch data from this count value. Similarly, the singer volume data and the model vocal volume data are compared in synchronization with the above-described comparison timing signal, and if they substantially match, the counter counts up, and from this count value, the degree of coincidence of the volume data is determined. calculate.

Further, a random number is generated so as to approach not only a reproducible mechanical comparison process but also a subjective evaluation. Then, the degree of coincidence of the pitch data, the degree of coincidence of the volume data, and the random number are added after multiplying the pitch-oriented parameter α, the volume-oriented parameter β, and the random-number-oriented parameter γ. The parameters α, β, and γ can be adjusted by the parameter setting unit 65 at an arbitrary ratio so as to satisfy α + β + γ = 1. The added value is converted into a point and output to the display unit 18.

Although the method of extracting the model vocal audio signal from the music data and scoring it with respect to the scoring parameter extracting unit 25 has been described, the music data may include only the accompaniment data without the audio signal. In this case, scoring reference parameters including time-series pitch data and volume data are added to the music data and distributed. in this case,
The scoring parameter extraction unit 25 extracts pitch data and volume data from the singer's voice signal and outputs the data to the CPU 10. The CPU 10 performs the scoring by comparing the input data with the scoring reference parameter.

Next, the operation of the above-described system will be described. First, an operation in which the mobile phone 1 downloads desired music data from the center 110 will be described. The key of the input unit 17 of the mobile phone 1 is operated to input the telephone number of the center 110, and the call button is turned on. By turning on the call button, the CPU 10
Activate the communication program stored in 12 and make a call. The transmission signal to which the telephone number information of the mobile phone 1 has been added is transmitted from the communication unit 13 to the base station 124c that manages the wireless zone to which the mobile phone 1 belongs via the antenna 1a. The base station 124c sends the received signal to the mobile switching center 123. The mobile switching center 123 determines the telephone switching center 121a of the center 110, and sends a signal to the route. An incoming signal is sent from the telephone exchange 121a to the center 110, and the incoming button is operated to establish a line.

When the line is established, a registration number, a music number desired to be distributed, and the like are transmitted from the mobile phone 1. Center 1
At 10, the received registration number is confirmed, and the download of the music data is started. The music data transmitted from the center 110 is transmitted from the base station 124c via the telephone exchange 121a, and is input to the communication unit 13 via the antenna 1a. The communication unit 13 outputs music data obtained by demodulating the received wireless signal. This music data is stored in the RAM 11. The music data includes data for accompaniment sounds (tone data, tempo data for determining the tempo to be reproduced, tone allocation data for setting the tone of each part, note data and rest data for one song), and a model. It is composed of vocal voice data, lyrics data, and graphics data for displaying a background image. When the download processing ends, the line is disconnected and the transmission processing ends.

Next, the operation of the karaoke mode in which the music is reproduced from the music data stored in the RAM 11 and the singer inputs an audio signal from the microphone 21 will be described. First, when the user performs a key operation of selecting a karaoke mode of the input unit 17, then inputs a desired music number from the input unit 17 and performs a key operation of instructing a performance start,
According to the music number input from the input unit 17, the CPU 1
0 reads out music data stored in the RAM 11. The music data read from the RAM 11 is input to the I / F 30 via the bus 24, and the music data is initialized.

In the initial setting process, the music data obtained by removing the tone data from the I / F 30 is stored in the RAM 32,
The tone data output from the I / F 30 is Voice
It is stored in the RAM 36. The sequencer 33 interprets the tone color assignment data, and sets the tone color parameter of each part to Vo.
The tempo data is set in the sequencer 33 while being read from the ice RAM 36 and set in the tone generator 34. When the initialization processing is completed, the reproduction of the music data is started, and the R / W controller 31
3 in response to the read request signal (Req) from the RAM 32
, And sequentially supplies the music data to the sequencer 33. The tone generator 34 generates tone signals of a plurality of parts based on tone parameters based on the music data input from the sequencer 33, and mixes and outputs the sample vocal tone data. The DAC 35 converts the input musical tone data into an analog musical tone signal by digital / analog conversion. The music signal is supplied to the mixer 51 via the coefficient multiplier 40.

On the other hand, the singer inputs a voice signal from the microphone 21. At this time, the coefficient of the coefficient multiplier 54 is "1", and the input audio signal is supplied to the mixer 51 and mixed with the reproduced tone signal. One of the mixed outputs is adjusted to a predetermined level by the coefficient multiplier 53 and is emitted from the speaker 23.
At this time, the CPU 10 sends the lyrics data and the graphics data in the music data to the display unit 18 in synchronization with the music reproduction processing, and displays them. Also, the mixer 51
Is supplied to the FM transmitter 26 via the coefficient multiplier 52. FM transmitter 26 is F
The M-modulated signal is transmitted to an external FM receiver via the antenna 27. When the FM transmitter 26 is turned on, the coefficient of the coefficient multiplier 53 becomes “0”, and the signal is output from the speaker 2.
No output from 3.

On the other hand, the scoring parameter extraction unit 25 receives the singer's voice signal input from the microphone 21 via the voice processing unit 14 and the tone signal reproduced by the music reproduction unit 15. The scoring parameter extraction unit 25 extracts singer pitch data and singer volume data from the input voice signal,
Further, sample vocal interval data and sample vocal volume data are extracted from the musical sound signal. Then, the pitch data and volume data of both voices are compared, and the score of the singer is calculated from the degree of coincidence. The CPU 10 causes the display unit 18 to display the score calculated by the scoring parameter extraction unit 25 together with the music playback timing.

Next, when the reproduction of the music is completed and the final scoring result is displayed on the display unit 18, if the user wants to send the scoring result to the center 110 and record it,
An operation of transmitting the scoring data is performed from the input unit 17. CPU
10 receives this operation and transmits a calling signal of the center 110. After the line is established with the center 110, the scoring data is transmitted together with the user number and the music number. The center 110 confirms that the received user number is registered, and stores the scoring data and the music number in an internal storage device. Next, for the song, the current ranking is determined, and the determined ranking is stored in the storage device. FIG. 5 is a diagram showing a storage state of the user data described above. The stored scoring data and ranking data are sent from the center 110 to the user's mobile phone periodically or when the user desires, and can be confirmed on the display unit 18 of the mobile phone.

As described above, according to the above-mentioned portable telephone system, the scoring data does not need to be managed by itself,
It can be easily received from the center 110 anywhere. This allows you to check your progress no matter where you are, at any time, and to obtain legitimate, formal, and objective scoring results. You can brag about it. Also, if the certificate or prize is sent offline based on the weekly ranking and the monthly ranking, the fun and motivation are further increased. Further, the price of downloading the music data may be reduced based on the weekly ranking, the monthly ranking, or the number of times the score data is registered.

[0036]

As described above, according to the present invention,
A singing ability scoring function is provided on the mobile phone, and the scoring results can be sent to the management center via the communication network so that they can be managed. Not only is it useful, but it also has the effect of increasing the enjoyment of karaoke. Further, according to the present invention, since the management center can distribute the scoring result and information on the ranking within the group at regular intervals, the scoring result can be effectively used in setting an effort target and practicing. The effect that it can be obtained is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of the mobile phone 1 in FIG.

FIG. 3 is a block diagram showing a configuration of an audio processing unit 14 and a music reproduction unit 15 in FIG. 2;

FIG. 4 is a block diagram showing a configuration of a scoring parameter extraction unit 25 in FIG. 2;

FIG. 5 is a diagram illustrating information stored in a center 110 in FIG.

[Description of Signs] 1 mobile phone, 1a, 27 antenna, 10 CPU
(Central processing unit), 11 RAM, 12 ROM, 13
Communication unit, 14 audio processing unit, 15 music playback unit, 16
I / F (interface), 17 input unit, 18 display unit, 19 vibrator, 21 microphone, 22, 23
Speaker, 24 bus, 25 scoring parameter extraction unit, 26 FM transmitter, 100 mobile phone system, 110 center, 120 communication network.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D108 BA06 BA16 BB04 BC20 BF04 5K027 AA11 DD11 HH19 HH29 9A001 BB01 BB03 BB04 CC05 DD13 EE04 EE05 GG05 GG22 HH15 HH18 KK31 KK43 KK57 KK62

Claims (7)

[Claims] 1. A portable telephone comprising: a communication unit for transmitting and receiving data to and from a base station by radio; and a communication unit for making a call with the outside via the communication unit. A music data storage unit for storing music data. Music reproducing means for reproducing music data stored in the music data storing means to generate music; synthesizing means for synthesizing an audio signal inputted from a microphone with an output of the music reproducing means; Sounding means for generating a signal generated by the following; a scoring means for scoring singing ability based on a voice signal input from the microphone; and a display means for displaying a scoring result of the scoring means. Mobile phone. 2. The mobile phone according to claim 1, further comprising a transmitting unit that transmits a scoring result of said scoring unit to a predetermined organization via said communication unit. 3. The apparatus according to claim 1, wherein the scoring unit scores by comparing a pitch and a volume extracted from an audio signal input from the microphone with parameters extracted from an output of the music reproducing unit. Alternatively, the mobile phone according to claim 2. 4. The scoring unit according to claim 1, wherein the scoring unit scores by comparing a pitch and a volume extracted from an audio signal input from the microphone with scoring reference parameters supplied from outside. Item 3. The mobile phone according to Item 2. 5. The mobile phone according to claim 1, further comprising an FM transmitting unit for performing an FM modulation on an output signal of the combining unit and transmitting the modulated signal. 6. A mobile phone according to claim 2, wherein the scoring result transmitted from said mobile phone is received and stored in an internal storage means, and said storage means in said storage means in response to a request from said mobile phone. A mobile phone, comprising: a data distribution center that transmits data or data obtained by processing the data to the mobile phone; and a communication network that connects the data distribution center and the mobile phone and transmits information. system. 7. The mobile phone according to claim 6, wherein the data distribution center has a plurality of music data and transmits the music data to the mobile phone in response to a request from the mobile phone. Phone system.