CN1855706B - Music reproduction device for portable device - Google Patents

Abstract

The present invention is a music reproducing device for a portable device that amplifies a sound signal from a portable device (12) and outputs it through a speaker (13, 14). The model discriminating unit (21) of the state signal of device (19) discrimination portable equipment (12) type; A volume/sound quality adjustment unit (22) for adjusting the signal; and a volume/sound quality adjustment for adjusting the volume and sound quality of the sound signal input from the portable device (12) according to the volume/sound quality adjustment signal from the volume/sound quality adjustment unit (22) Amplifier (20). Thereby, high-quality audio reproduction with a large volume can be performed.

Description

Music reproduction device for portable equipment

Technical field

The present invention relates to a music reproducing device for portable devices, in particular to a portable device that can be connected to a variety of portable devices with different output levels, and can realize high-volume, high-quality sound reproduction regardless of the type of portable device connected. music reproduction device.

Background technique

Now, as portable devices, portable music players are becoming popular. For the convenience of carrying, most of them are miniaturized into a pocket size. In addition, the output specifications of these portable music players are also various, and most people listen to music with small built-in speakers, earphones or headphones. These portable music players install a storage medium, or take in and store a plurality of pieces of music data from an external device, and these data can be arbitrarily selected for reproduction. Alternatively, there are also devices that receive radio broadcasts and reproduce them.

In addition, it has recently begun to appear that a plurality of pieces of music data can be distributed via the Internet or taken in from an external device and stored in a mobile phone. Even in a mobile phone, the stored music data can be reproduced and enjoyed in the same manner as the above-mentioned portable music player.

In the case of carrying these portable music players and mobile phones to listen to music when going out, use the above-mentioned small built-in speakers, earphones or headphones to listen to music, but in the case of listening to music at home, etc., it is necessary to increase the size. Volume and listen to such needs with high sound quality.

In order to meet this demand, there are conventional technologies proposed in JP-A-2003-101618 (Patent Document 1) and JP-A-2003-79061 (Patent Document 2). The prior art described in Japanese Patent Application Laid-Open No. 2003-101618 is a technology for reproducing music by using a mobile phone, so the amplifier and the speaker can be built into the charger for charging the battery of the mobile phone, and the mobile phone can be used for charging when charging. The music data of the phone is amplified to increase the volume for reproduction. In addition, since the prior art described in JP-A-2003-79061 is a technology for reproducing music using a portable audio device, an amplifier can be built in a charger, and a speaker connected to the charger can be outputted during the charging process. The amplified music data in the player can be reproduced at an increased volume.

However, the output levels of the above-mentioned portable music players and mobile phones vary depending on the model. In the above-mentioned prior art, when listening to music with an external amplifier and speaker, it is necessary to adjust the output level according to the model of the portable device. It is very troublesome to adjust the magnification of the amplifier. In addition, since portable music players have to consider the performance for listening to music, generally speaking, recording and reproduction are performed at 128kbps or more, but the bit rate of music data in mobile phones is lower than that, and there is a problem that even if the volume is turned up, The sound quality is also poor such a problem.

Contents of the invention

The object of the present invention is to provide a music reproducing device for portable equipment. When using an external amplifier to amplify the music data of a portable music player or a mobile phone and output the sound through an external speaker, no matter what kind of portable equipment is connected, , there is no need to adjust the amplification factor of the amplifier one by one for the connected portable device. In addition, even in the case of reproducing low-quality music data like a mobile phone, it can realize high-volume high-quality sound reproduction.

The gist of the invention of the first aspect of the present invention is to provide a music reproduction device for a portable device, which amplifies the sound signal input from the portable device and outputs it from a speaker, and is characterized in that it has: A connector corresponding to the model, a portable device connection cable for inputting the above-mentioned sound signal from the above-mentioned portable device; a model discrimination unit for discriminating the model of the above-mentioned portable device according to the connected above-mentioned connector; a volume/sound quality adjustment unit that adjusts the volume/sound quality of the volume/sound quality adjustment signal based on the model of the portable device identified by the unit; A volume/tone quality adjustment amplifier for volume, tone quality, or volume and tone quality of an input sound signal.

In addition, the gist of the invention of the second aspect of the present invention is to provide the music reproducing device for portable equipment according to the first aspect, characterized in that, in the above-mentioned connector, in addition to the contact for the sound signal that transmits the above-mentioned sound signal In addition to the components, a plurality of model-discriminating contact members selectively grounded by a changeover switch are provided, and the model discriminating unit discriminates the model of the portable device based on the grounding state of the model-discriminating contact members.

In addition, the gist of the third aspect of the present invention is to provide the music reproducing device for portable equipment according to the first aspect, wherein, in the above-mentioned connector, in addition to the contact for the sound signal that transmits the above-mentioned sound signal, In addition to the components, it is also equipped with a plurality of contact parts for model discrimination that are selectively connected to and grounded by the connector on the side of the cable for connection of the portable device to the contact part for grounding. The model of the above-mentioned portable device is determined by the grounding state of the component.

In addition, the gist of the fourth aspect of the present invention is to provide the music reproduction device for portable equipment according to the first aspect, characterized in that the audio signal contact member of the connector is connected to the above-mentioned connector via a DC blocking capacitor. Portable equipment is connected to the signal line of the cable, and is connected to the above-mentioned volume/sound quality adjustment amplifier through another DC-blocking capacitor. When dismounting, the model discriminating unit discriminates the model of the portable device based on the voltage of the contact member for discriminating the model that changes according to the state of attaching and detaching the grounding resistor.

In addition, the gist of the fifth aspect of the present invention is to provide the music reproducing device for portable equipment as described in the first aspect, wherein the contact member for the audio signal of the connector is connected to the above-mentioned connector via a DC blocking capacitor. Portable equipment is connected to the signal line of the cable, and connected to the above-mentioned volume/sound quality adjustment amplifier through another DC-blocking capacitor. grounded, and the model discriminating unit discriminates the model of the portable device based on the voltage of the model discriminating contact member that changes according to the on/off state of the switch.

In addition, the gist of the sixth aspect of the present invention is to provide the music reproducing device for portable equipment according to the first aspect, which is characterized in that: in addition to the contact member for transmitting the above-mentioned sound signal, it also includes: The above-mentioned type discrimination contact part of the above-mentioned model discrimination contact part and the grounding contact part; one end is pulled up to a high potential, and the other end is connected to the input of the above-mentioned model discrimination unit and the above-mentioned model discrimination information input contact part The first resistance; and the second resistance between the above-mentioned model discrimination information input contact member and the grounding contact member connected to the connector on the side of the portable device connection cable, the above-mentioned model discrimination unit is based on the above-mentioned first resistance. The model discrimination information generated by the first resistor and the second resistor is input using the voltage of the contact member to discriminate the model of the portable device.

In addition, the gist of the seventh aspect of the present invention is to provide the music reproducing device for portable equipment according to the first aspect, wherein, in the above-mentioned connector, in addition to the contact member for transmitting the above-mentioned sound signal, The device further includes a plurality of model-distinguishing contacts selectively short-circuited by a changeover switch, and the model discriminating unit discriminates the model of the portable device based on the short-circuit state of the model-discriminating contacts.

In addition, the gist of the eighth aspect of the present invention is to provide the music reproducing device for portable equipment according to the first aspect, which is characterized in that it includes a device for detecting protruding from the connection surface of the connector to the portable equipment. The detection means of the protruding part on the side of the music reproducing apparatus, and the model discriminating means discriminates the model of the portable device by detecting the protruding part.

In addition, the gist of the ninth aspect of the present invention is to provide the music reproduction device for portable devices according to any one of the first to eighth aspects, wherein the volume/sound quality adjustment unit includes The volume/sound quality setting unit and the volume/sound quality setting memory, based on the discrimination result from the above-mentioned model discrimination unit, the setting data of volume and sound quality are set from the above-mentioned volume/sound quality setting memory to the above-mentioned volume/sound quality setting A unit, wherein the volume/sound quality adjustment amplifier adjusts the volume, sound quality, or both volume and sound quality of the sound signal input from the portable device based on the set volume and sound quality setting data.

In addition, the gist of the tenth invention of the present invention is to provide the music reproducing device for portable equipment according to any one of the first to eighth inventions, wherein the volume/sound quality adjustment amplifier includes A plurality of gain control units for controlling gain for each sound frequency band adjust the volume, sound quality or volume of the sound signal input from the portable device for each sound frequency band based on the volume/sound quality adjustment signal from the volume/sound quality adjustment unit. and sound quality.

In addition, the gist of the eleventh aspect of the present invention is to provide a music reproduction device for a portable device, which amplifies a sound signal input from the portable device and outputs it from a speaker, and is characterized in that it includes: A connector corresponding to the model of the device, a portable device connection cable for inputting the above-mentioned sound signal from the above-mentioned portable device; a model discrimination unit for discriminating the model of the above-mentioned portable device according to the connected connector; A volume adjustment unit that adjusts the volume of the volume adjustment signal for the type of the portable device discriminated by the type discrimination unit; and a volume that adjusts the volume of the sound signal input from the above-mentioned portable device according to the volume adjustment signal from the volume adjustment unit Adjust the amplifier.

In addition, the gist of the twelfth invention of the present invention is to provide a music reproduction device for a portable device, which amplifies a sound signal input from the portable device and outputs it from a speaker, and is characterized in that it has: A connector corresponding to the model of the device, a portable device connection cable for inputting the above-mentioned sound signal from the above-mentioned portable device; a model discrimination unit for discriminating the model of the above-mentioned portable device according to the connected connector; A sound quality adjustment unit for adjusting the sound quality of a sound quality adjustment signal based on the type of the portable device discriminated by the type discrimination unit; Adjust the amplifier.

In addition, a thirteenth aspect of the present invention is to provide the music reproduction device for portable devices according to any one of the first to eighth and eleventh and twelfth aspects, characterized in that: The model discriminating unit stores a reference table in which the model of the portable device is associated with the input signal pattern, and discriminates the model of the portable device based on the input signal pattern.

In addition, the gist of the fourteenth invention of the present invention is to provide the music reproduction device for portable equipment according to any one of the first to eighth and the eleventh and twelfth, characterized in that: A power supply circuit that receives power from a commercial power supply to generate a control power supply. The power supply circuit is supplied internally as a control power supply and is also supplied to the portable device as a power source for charging a battery of the portable device.

In addition, the gist of the invention of claim 15 of the present invention is to provide a music reproduction device for a portable device, which amplifies a sound signal input from the portable device and outputs it from a speaker, and is characterized in that it is connected to the portable device. A connector part for inputting an audio signal from the above-mentioned portable device with a connector of a cable; and a model for discriminating the model of the above-mentioned portable device based on the signal input when the above-mentioned connector part is connected to the connector of the above-mentioned portable device connection cable A kind of discriminating unit; Output the volume/sound quality adjusting unit that adjusts the adjustment signal of volume/sound quality according to the model of the above-mentioned portable device discriminated by the above-mentioned model judging unit; And adjust according to the adjustment signal from the above-mentioned volume/sound quality adjusting unit A volume/sound quality adjustment amplifier for the volume, sound quality, or both of the sound signal input from the above-mentioned portable device.

Description of drawings

FIG. 1 is a configuration diagram of a music reproduction device for a portable device according to a first embodiment of the present invention.

2 is a diagram showing details of a connector portion of the portable device connection cable in the first embodiment of the present invention.

3 is a detailed configuration diagram illustrating volume/sound quality adjustment means in the first to sixth embodiments of the present invention.

FIG. 4 is a diagram illustrating sound quality adjustment in the first to sixth embodiments of the present invention.

FIG. 5 is a diagram showing an example of characteristics after sound quality adjustment in the first to sixth embodiments of the present invention.

Fig. 6 is a configuration diagram of a music reproduction device for a portable device according to a second embodiment of the present invention.

7 is a diagram showing details of a connector portion of a cable for connecting a portable device according to a second embodiment of the present invention.

Fig. 8 is a configuration diagram of a music reproduction device for a portable device according to a third embodiment of the present invention.

9 is a diagram showing details of a connector portion of a cable for connecting a portable device in a third embodiment of the present invention.

Fig. 10 is a configuration diagram of a music reproduction device for a portable device in a fourth embodiment of the present invention.

11 is a diagram showing details of a connector portion of a cable for connecting a portable device in a fourth embodiment of the present invention.

Fig. 12 is a configuration diagram of a music reproduction device for portable devices in a fifth embodiment of the present invention.

13 is a diagram showing details of a connector portion of a cable for connecting a portable device in a fifth embodiment of the present invention.

Fig. 14 is a diagram illustrating a portable device connection cable according to a sixth embodiment of the present invention.

Fig. 15 is a diagram illustrating a portable device connection cable according to a sixth embodiment of the present invention.

Symbol Description

1-10 Connecting pins (contact parts)

11, 30, 40, 50, 57 Combination audio (seat audio equipment)

12 portable devices

13, 14 speakers

15 Speaker connection cable

17, 31, 41, 51, 58, 80, 85 Cables for connecting portable devices

16, 18, 32, 42, 52, 60, 81, 86, 26, 27 connectors

19, 33, 43, 53, 82, 87 connectors

20 volume / sound quality adjustment amplifier

21, 34, 44, 56, 61 model identification unit

22 volume/sound quality adjustment unit

23 power circuit

24 plug

25 Cable for portable power connection

28 amplifiers

54, 55 switch

62 volume/sound quality setting unit

63 volume/sound quality setting memory

64 amplifier gain control unit

65 signal addition unit

66 low pass filter

67-69 Bandpass filter

70 high pass filter

71-75 Gain Control Unit

83, 88 Signal connection pin arrangement part (signal contact part arrangement part)

84 protrusions

100, 110, 120, 130 Number of connecting pins (contact parts)

101, 111, 121, 131 Signal content corresponding to each connecting pin (contact part)

102, 122 transfer switch

103, 123 conversion contacts

Detailed ways

Next, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

(first embodiment)

FIG. 1 is a diagram showing the configuration of a music playback device for portable devices according to a first embodiment of the present invention. In FIG. 1 , 11 is a seat-type audio device called a stereo system or the like (hereinafter referred to as a stereo system). 12 is a portable device such as a portable music player or a mobile phone. 13 and 14 are speakers connected as the sound output of the sound system 11, 13 is a stereo speaker arranged for L (left), and 14 is arranged for R (right).

Reference numeral 15 denotes a speaker connection cable for connecting the audio system 11 and the speakers 13 and 14 . 16 is a connector for connecting the speaker connection cable 15 to the audio system 11 . Reference numeral 17 denotes a portable device connection cable for connecting the portable device 12 and the stereo unit 11 . Connectors 18 and 19 are provided at both ends of the portable device connection cable 17. 18 is a connector connected to the portable device 12, and 19 is a connector connected to the stereo system. In addition, the portable device 12 and the audio system 11 are connected at both ends by a portable power supply connection cable 25 equipped with connectors 26 and 27 .

The speaker system 11 includes a volume/sound quality adjustment amplifier 20 , a speaker system amplifier 28 , a model discrimination unit 21 , a volume/sound quality adjustment unit 22 , and a power supply circuit 23 . Also, the "volume/tone" in the 20's volume/tone adjustment amplifier means only the volume, only the sound quality, and both the volume and the sound quality. That is, the volume/sound quality adjustment amplifier refers to any one of an adjustment amplifier that adjusts only the volume, an adjustment amplifier that adjusts only the sound quality, and an adjustment amplifier that adjusts both the volume and the sound quality. The meaning of "volume/sound quality" in the following volume/sound quality adjustment section 22, volume/sound quality setting section 62, and volume/sound quality setting memory 63 is also the same. In the present invention, the description of "volume/sound quality" means only the volume, only the sound quality, and both of the volume and the sound quality.

The model discrimination unit 21 takes in a signal from the connector 19 and outputs the model discrimination result to the volume/sound quality adjustment unit 22 . The volume/sound quality adjustment unit 22 outputs a volume/sound quality adjustment signal to the volume/sound quality adjustment amplifier 20 based on the model discrimination result of the model discrimination unit 21 . The volume/sound quality adjustment amplifier 20 adjusts the volume and sound quality according to the adjustment signal from the volume/sound quality adjustment unit 22, increases the volume, and outputs a high-quality sound signal. As a result, loud and high-quality sound and sound are output from the speakers 13 and 14 . In addition, although illustration is omitted, in addition to the audio signal from the portable device 12, other audio signals can also be input to the amplifier 28 for the audio system.

Moreover, the power supply circuit 23 is provided in the audio system 11, and the plug 24 is inserted into the socket of a commercial power supply, and electric power is obtained. The power supply circuit 23 supplies power to the audio system 11 itself, and charges the battery of the portable device 12 through the portable power supply connection cable 25 .

FIG. 2 shows details of the signal arrangement of the connector 19 of the portable device connection cable 17 . 100 represents the number (1 to 10) of the connecting pins (contact parts) of the connector. 101 represents the signal content corresponding to each connection pin.

Configure the sound signal L on the connection pin 1, configure LGND on the connection pin 2, configure the sound signal R on the connection pin 3, and configure RGND on the connection pin 4. The sound signal L and LGND are the L (left) side sound signal wiring of the stereo signal. In addition, the audio signal R and RGND are the R (right) side audio signal wiring of the stereo signal. The audio signal L connected to the pin 1 and the audio signal R connected to the pin 3 are connected to a volume/sound quality adjustment amplifier 20 . LGND connected to pin 2 and RGND connected to pin 4 are connected to ground (connected to signal ground G).

In addition, a changeover switch 102 is provided on the connector 19 . Connecting pins 5 to 10 of the connector 19 (connecting pins for model discrimination (contact parts for model discrimination)) are respectively connected to the conversion contact 103 of the changeover switch 102, and can be manually connected to the connection pin 4 (RGND). convert. Therefore, according to the setting state of the changeover switch 102 , one of the connecting pins 5 to 10 is grounded through the connecting pin 4 . Signals indicating the ground state from the connection pins 5 to 10 are taken into the model discrimination unit 21 .

Thereby, depending on which position of the connection pins 5 to 10 the changeover switch 102 is provided, it can be determined what kind of portable device connection cable 17 it is connected to. Furthermore, in this embodiment, the state of the changeover switch 102 of the portable device connection cable 17 is changed and used according to the model of the portable device 12 . Therefore, the model discriminating unit 21 can discriminate which model of the portable device is connected.

In addition, in the case of Fig. 2, the changeover switch 102 can distinguish 6 models, if the changeover switch 102 is set as a digital signal switch (connecting pins 5-10 can be set to 1, 0 respectively), then it can be obtained 6-bit information can identify 64 models.

In addition, in FIG. 2 , the connecting pins 5 to 10 are selectively grounded using the changeover switch 102 , but direct wiring can also be performed at the connector part without using the changeover switch. In this case, it is only necessary to make dedicated cables for the model identification part, and the grounding positions of these cables corresponding to the models are changed to perform model identification. If this is done, the cable can be made inexpensively without the need for a changeover switch.

FIG. 3 is a diagram showing a more detailed configuration of a portion that performs volume/sound quality adjustment. The volume/sound quality adjustment amplifier 20 is composed of an amplifier gain control unit 64, a signal addition unit 65, a low-pass filter (hereinafter referred to as LPF) 66, and a band-pass filter (hereinafter referred to as BPF (1)-(n)) 67-69 , a high-pass filter (hereinafter referred to as HPF) 70, and gain control units (0)-(n+1) 71-75. In addition, the volume/sound quality adjustment unit 22 is composed of a volume/sound quality setting unit 62 and a volume/sound quality setting memory 63 . In addition, the part with the same code|symbol as FIG. 1 shows the same content.

In this embodiment, the setting state of the changeover switch 102 of the connector 19 connected to the portable device is taken into the model discriminating unit 21, and the model discriminating unit 21 determines the Identify the model.

The model identification means 21 prepares a reference table for specifying the model corresponding to the signal pattern input from the connector 19, and calls the corresponding setting value of the volume/sound quality setting memory 63 according to the specified model. The recalled setting value is set in the register of the volume/sound quality setting unit 62 . The volume/sound quality setting memory 63 stores in advance setting values for high sound quality corresponding to each model. This setting can be adjusted for user preference. Furthermore, as an example of the above-mentioned reference table, the storage address and volume/sound quality setting unit for converting the signal mode input by the connector 19 into the corresponding set value stored in the volume/sound quality setting memory 63 can be mentioned. The translation table of the address of the 62 registers.

The amplifier gain control unit 64, signal addition unit 65, LPF66, BPF (1)～(n)67～69, HPF70, gain control unit (0)～(n+1)71～75 shown in Fig. Your preference constitutes an equalizer that can adjust the gain for each frequency band.

FIG. 4 is a diagram showing an example of sound quality adjustment with frequency on the horizontal axis and response on the vertical axis, performed by gain control unit (0) 71, gain control unit (1) 72, and gain control unit (2) 73. Adjustment. FIG. 4 shows the situation of adjustment based on a plurality of characteristic curves. That is, gain control section ( 0 ) 71 , gain control section ( 1 ) 72 , and gain control section ( 2 ) 73 make their gains variable for the type of portable device to obtain high sound quality, and add them in signal addition section 65 . Also, the overall volume is adjusted by the amplifier gain control unit 64 or the amplifier 28 .

FIG. 5 shows an example of the frequency-response characteristics of a mobile phone and a portable music player adjusted as in FIG. 4 . Thus, according to this embodiment, since the gain can be adjusted for each frequency band according to the model of the connected portable device 12, no matter what kind of portable device is connected, it is possible to enjoy loud and high-quality music. Furthermore, Fig. 5 is only an example, and it goes without saying that other features can be added according to the user's preferences.

In addition, control of various gain control units of the model discrimination unit 21, the volume/sound quality setting unit 62, the volume/sound quality setting memory 63, and the volume/sound quality adjustment amplifier 20 is performed by a microcomputer not shown.

(second embodiment)

FIG. 6 is a diagram showing a configuration of a music reproduction device for a portable device according to a second embodiment of the present invention. Compared with the first embodiment, in this embodiment, the method of identifying the model of the mobile device is different.

In FIG. 6 , 31 is a portable device connection cable, a connector 32 is provided on the portable device 12 side, and a connector 33 is provided on the stereo unit 30 side. In addition, the part with the same code|symbol as FIG. 1 shows the same content. Furthermore, the model of the portable device in this embodiment is determined by the level of the DC bias voltage in the connector 33 of the L signal and the R signal input from the portable device connection cable 31 .

FIG. 7 shows details of the signal arrangement of the connector 33 of the portable device connection cable 31 . 110 denotes the number (1 to 4) of the connection pin (contact member for signal connection) of the connector 33 . 111 represents signal content corresponding to each connection pin of the connector 33 . Connecting pin 1 of the connector 33 is configured with sound signal L, connecting pin 2 with LGND, connecting pin 3 with sound signal R, and connecting pin 4 with RGND. The sound signal L and LGND are the L (left) side sound signal wiring of the stereo signal. In addition, the audio signal R and RGND are the R (right) side audio signal wiring of the stereo signal.

The audio signal L from the portable device 12 is connected to the connection pin 1 of the connector 33 via the DC blocking capacitor C1, and connected to the volume/sound quality adjustment amplifier 20 via the DC blocking capacitor C3. Also, the audio signal R from the portable device 12 is connected to the connection pin 3 of the connector 33 via the DC blocking capacitor C2, and connected to the volume/sound quality adjustment amplifier 20 via the DC blocking capacitor C4. In addition, the connection pin 1 and the connection pin 3 of the connector 33 are connected to the model discrimination unit 34 .

Furthermore, one end of the resistor R1 is connected to the connection pin 1 on the connector 33 side, and the other end is connected to the connection pin 4 on the connector 33 side. In addition, one end of the resistor R2 is connected to the connection pin 3 on the connector 33 side, and the other end is connected to the connection pin 4 on the connector 33 side. In addition, one end of the resistor R3 is connected to the connection pin 1 on the connector 30 side (hereinafter, this connection point is referred to as TP1 ), and the other end is pulled up to the power supply Vcc. In addition, one end of the resistor R4 is connected to the connection pin 3 on the connector 30 side (hereinafter, this connection point is referred to as TP2 ), and the other end is pulled up to the power supply Vcc. In addition, the pulled-up potential is not limited to the power supply Vcc, and may be pulled up to a predetermined high potential.

Therefore, at TP1 and TP2, DC voltages are superimposed on the audio signals R and L at the respective voltage dividing ratios of the resistors R1 and R3, R2 and R4. In addition, since the TP1 and TP2 parts use the DC blocking capacitors C1, C2, C3, and C4 to block the DC between the portable device side and the stereo side, the DC voltage biased by the resistors R1 to R4 will not affect the portable device. 12 and volume/sound quality adjustment amplifier 20.

When there is such a connection relationship, the voltages of TP1 and TP2 can be changed to Vcc, Vcc/2 by connecting or not connecting the respective resistors R1, R2, for example assuming R1=R2=R3=R4. The voltages of TP1 and TP2 are input to the model discrimination unit 34, and by connecting or not connecting the respective resistors R1 and R2, it can be discriminated what kind of portable device connection cable 17 is connected. Furthermore, in the present embodiment, the connection state of resistors R1 and R2 is changed and used according to the model of the portable device, so that the model discriminating unit 34 can discriminate which model of the portable device is connected. In addition, when the values of the resistors R1 to R4 are equal, four models can be discriminated, but by changing the resistance value, more models can be discriminated.

This embodiment is also the same as the first embodiment. In the model discrimination unit 34, a reference table that can determine the model corresponding to the input signal pattern is prepared. According to the determined model, the volume / volume can be adjusted and set. A sound quality adjustment unit 22 , and a volume/sound quality adjustment amplifier 20 .

Therefore, in the present embodiment, since the gain can be adjusted for each frequency band according to the model of the connected portable device 12 , it is possible to enjoy loud and high-quality music.

(third embodiment)

FIG. 8 is a diagram showing the configuration of a music reproduction device for portable devices according to a third embodiment of the present invention. Compared with the first embodiment and the second embodiment, in this embodiment, the method of discriminating the model of the mobile device is different.

In FIG. 8 , 41 is a portable device connection cable, a connector 42 is provided on the portable device 12 side, and a connector 43 is provided on the stereo unit 40 side. Furthermore, the model discrimination of the mobile device in this embodiment is performed by short-circuiting any two connection pins (contact members) of the connector 43 to determine the short-circuit state. In addition, the part with the same code|symbol as FIG. 1 shows the same content.

FIG. 9 shows details of the signal arrangement of the connector 43 of the portable device connection cable 41 . 120 denotes the number (1 to 10) of the connection pins (contact members) of the connector 43 . 121 represents signal content corresponding to each connection pin of the connector 43 . Connecting pin 1 of connector 43 is configured with sound signal L, connecting pin 2 with LGND, connecting pin 3 with sound signal R, and connecting pin 4 with RGND. The sound signal L and LGND are the L (left) side sound signal wiring of the stereo signal. In addition, the audio signal R and RGND are the R (right) side audio signal wiring of the stereo signal.

The audio signal L from the portable device 12 is connected to the connection pin 1 of the connector 43 and connected to the volume/sound quality adjustment amplifier 20 . Also, the audio signal R from the portable device 12 is connected to the connection pin 3 of the connector 43 and connected to the volume/sound quality adjustment amplifier 20 . Connect LGND to pin 2 and RGND to pin 4 to ground (connect to signal ground G).

In addition, a changeover switch 122 is provided on the connector 43 . Connecting pins 5 to 9 of the connector 43 (connecting pins for model discrimination (contact parts for model discrimination)) are respectively connected to the conversion contacts 123 of the changeover switch 122, and can be switched manually so that the connection pins 10 and 10 are connected to each other. is short-circuited. Therefore, according to the setting state of the changeover switch 122 , one of the connection pins 5 to 9 is short-circuited with the connection pin 10 . A signal indicating the short-circuit state between the connection pins 5 to 9 and the connection pin 10 is taken into the model discrimination unit 44 .

Thereby, depending on which position of the connection pins 5 to 9 the changeover switch 122 is provided, it can be determined what kind of portable device connection cable 41 it is connected to. In addition, in this embodiment, the state of the changeover switch 122 of the portable device connection cable 41 is changed and used according to the model of the portable device 12 . Therefore, the model discriminating unit 44 can discriminate which model of the portable device is connected. In addition, when the changeover switch 122 is shown in FIG. 9, five models can be discriminated.

This embodiment is also the same as the first embodiment and the second embodiment. In the model discrimination unit 44, a reference table that can determine the model corresponding to the input signal pattern is prepared. Based on the determined model, adjust, The volume/sound quality adjustment unit 22 and the volume/sound quality adjustment amplifier 20 are set.

Therefore, in the present embodiment, since the gain can be adjusted for each frequency band according to the model of the connected portable device 12, it is possible to enjoy loud and high-quality music.

(fourth embodiment)

FIG. 10 is a diagram showing the configuration of a music playback device for portable devices according to a fourth embodiment of the present invention. In addition, FIG. 11 shows the details of the signal arrangement of the connector 53 of the portable device connection cable 51 . 51 is a portable device connection cable, a connector 52 is provided on the portable device 12 side, and a connector 53 is provided on the stereo unit 50 side. The connector 53 is provided with resistors R1, R2, DC blocking capacitors C1, C2 as in the second embodiment, and switches 54, 55 which are not in the second embodiment are also provided. In addition, the part with the same code|symbol as FIG. 1 shows the same content.

The method of discriminating the model of the portable device of this embodiment is the same as that of the second embodiment, but the connection method of the resistors R1 and R2 is different. That is, in the second embodiment, the connection state of the resistors R1, R2 can be switched by attaching or detaching the resistors R1, R2, but in this embodiment, it is performed by the switches 54, 55. Other than that, since the operation is also the same as that of the second embodiment, detailed description thereof will be omitted.

Compared with the second embodiment, the present embodiment does not require attachment and detachment of the resistors R1 and R2 , and the handling for changing the model of the portable device 12 becomes easier.

In the present embodiment, since the gain can be adjusted for each frequency band according to the model of the connected portable device 12, it is possible to enjoy loud and high-quality music.

(fifth embodiment)

FIG. 12 is a diagram showing the configuration of a music playback device for portable devices according to a fifth embodiment of the present invention. This embodiment is similar to the second and fourth embodiments, but it is different from that of the portable device 12 in that a dedicated connection pin (contact member for model discrimination information input) DET is provided for model discrimination, and a direct current is superimposed here. The models differ in that the value of the resistor R5 is changed correspondingly, and in that the DC blocking capacitors C1 to C4 and the switches 54 and 55 are not connected.

In FIG. 12 , 58 is a portable device connection cable, a connector 59 is provided on the portable device 12 side, and a connector 60 is provided on the stereo unit 57 side. A model discriminating unit 61 and a resistor R6 are equipped on the combined sound system 57 . In addition, the part with the same code|symbol as FIG. 1 shows the same content. Furthermore, in this embodiment, the model of the portable device is determined based on the level of the DC voltage input from the connector 60 of the cable 58 for connecting the portable device (the contact part DET for inputting the model identification information). kind.

FIG. 13 shows details of the signal arrangement of the connector 60 of the portable device connection cable 58 . 130 denotes the numbers (1 to 6) of the connection pins (contact members) of the connector 60 . 131 represents signal content corresponding to each connection pin of the connector 60 . Connecting pin 1 of connector 60 is provided with sound signal L, connecting pin 2 is provided with LGND, connecting pin 3 is provided with sound signal R, and connecting pin 4 is provided with RGND. The sound signal L and LGND are the L (left) side sound signal wiring of the stereo signal. In addition, the audio signal R and RGND are the R (right) side audio signal wiring of the stereo signal.

The audio signal L from the portable device 12 is connected to the connection pin 1 of the connector 60 and connected to the volume/sound quality adjustment amplifier 20 . Also, the audio signal R from the portable device 12 is connected to the connection pin 3 of the connector 60 and connected to the volume/sound quality adjustment amplifier 20 .

Furthermore, one end of the resistor R5 is connected to the connection pin 5 (DET) on the connector 60 side, and the other end is connected to the connection pin 6 (ground contact member) on the connector 60 side. In addition, one end of the resistor R6 is pulled up to the power supply Vcc, and the other end is connected to the dedicated connecting pin 5 (DET) for model identification and the model identification unit 61 . In addition, the pulled-up potential is not limited to the power supply Vcc, and may be pulled up to a predetermined high potential. Therefore, if the resistance ratio of the resistor R5 to the resistor R6 is changed, the DC voltage is applied to the connection pin 5 (DET) according to the voltage division ratio of the resistors R5 and R6.

The voltage of the connection pin 5 (DET) is input to the model identification unit 61, and it can be determined what kind of portable device connection cable 58 is connected according to the voltage value. Moreover, in this embodiment, since the voltage dividing ratio of the resistors R5 and R6 is changed (the resistance value of R6 is fixed and the resistance value of R5 is changed) and used according to the model of the portable device 12, the model discrimination unit 61 can Identify which type of portable device is connected. By setting a plurality of voltage dividing ratios of the resistors R5 and R6, various types of models can be discriminated.

In this embodiment, as in the first embodiment, a reference table is prepared in the model discrimination unit 61 that can determine the model corresponding to the input signal pattern, and the volume/sound quality is adjusted and set according to the determined model. Adjustment unit 22 , volume/sound quality adjustment amplifier 20 .

Thus, according to this embodiment, there is an advantage that the problem can be solved without connecting a capacitor or a resistor to the signal line. In addition, in the present embodiment, since the gain can be adjusted for each frequency band according to the model of the connected portable device 12, it is possible to enjoy loud and high-quality music.

(sixth embodiment)

14 and 15 are diagrams showing the configuration of a music reproduction device for portable devices according to a sixth embodiment of the present invention. In the above-mentioned first to fourth embodiments, the signal status of the portable device connection cable connected to the stereo unit is switched to determine the model of the connected portable device 12, but in this embodiment, the portable device 12 is For the model of the connector, prepare the parts with and without protrusions on the connector as shown in Fig. 14 and Fig. 15, and distinguish the model by detecting the presence or absence of the protrusions.

In FIG. 14, 12 denotes a portable device, and 80 denotes a cable for connecting the portable device. Portable device connection cable 80 shown in FIG. 84.

In addition, in FIG. 15 , 12 denotes a portable device, and 85 denotes a cable for connecting the portable device. Portable device connection cable 85 shown in FIG.

Comparing FIG. 14 and FIG. 15 , it can be seen that the connector 87 of the portable device connection cable 85 does not have a portion corresponding to the protrusion 84 . The mobile device connection cable 80 and the mobile device connection cable 85 are used according to the model of the mobile device 12 .

Furthermore, on the side of the audio system corresponding to the connectors 82 and 87, a switch for detecting the protrusion 84 when the connector 82 is inserted is provided.

For example, when the portable device 12 is a mobile phone, the portable device connection cable 80 is used, and when the portable device 12 is a portable music player, the portable device connection cable 85 is used. In this way, the presence or absence of the protruding portion of the portable device connection cable can be changed according to the model of the portable device. Therefore, for example, when the connector 82 is inserted into the stereo system, the protrusion 84 is detected by the switch corresponding to the protrusion 84, and the model identification unit equipped on the stereo system can judge that the connected portable device 12 is a mobile phone.

In this way, in this embodiment, as in the above-mentioned first to fifth embodiments, the model of the connected portable device 12 can be specified, and the volume/sound quality adjustment unit 22 can be adjusted and set according to the specified model. , volume/sound quality adjustment amplifier 20.

Therefore, in the present embodiment, since the gain can be adjusted for each frequency band according to the model of the connected portable device 12, it is possible to enjoy loud and high-quality music.

As above, the present invention has been specifically described using the first to sixth embodiments, and the amplifier 28 provided for amplification of the stereo system can be shared with the volume/sound quality adjustment amplifier 20 provided for amplification of the portable device 12 . In addition, examples of connectors such as 4-pins, 6-pins, and 10-pins of the cable for connecting a portable device have been shown, but are not limited thereto. In addition, the speakers 13 and 14 may also be built in a sound system. In addition, in the above-mentioned first to sixth embodiments, the example of using the portable power supply connection cable 25 was given, but the connector 26 can be used as a charging base on which a portable device can be installed and charged. Instead of the cable 25 for connecting a portable power source, a charging base for installing and charging a portable device is provided in the stereo system. In addition, the cables 17 , 31 , 41 , 51 , 58 , 80 , and 85 for connecting a portable device may be integrated with the cable 25 for connecting a portable power source. In addition, in the first to sixth embodiments above, the portable device 12 for music reproduction was taken as an example, but if the portable device can reproduce both video and audio, a stereo system can also be implemented as a video display device.

In addition, it goes without saying that the present invention is not limited to the above-described embodiments, and can be implemented with changes within the scope of the present invention.

The effect of the invention

According to the present invention, when using an external amplifier to amplify the music data of a portable music player or a mobile phone and output the sound through an external speaker, no matter what kind of portable device is connected, it is not necessary to adjust the amplifier's power level individually for the connected portable device. In addition, even in the case of reproducing low-quality music data like a mobile phone, high-volume high-quality sound reproduction can be realized.

Industrial availability

In the present invention, if a portable device can reproduce both video and audio, it can be widely used not only as an audio device but also as a video display device.

Claims (15)

1. A music reproduction device for a portable device, which amplifies the sound signal input from the portable device and outputs it from a loudspeaker, characterized in that it has: A cable for connecting a portable device, having a connector corresponding to the type of the portable device, and inputting the audio signal from the portable device; a model discrimination unit, which discriminates the model of the portable device according to the connected connector; a volume/sound quality adjustment unit that outputs a volume/sound quality adjustment signal for adjusting volume/sound quality according to the model of the portable device discriminated by the model discrimination unit; and, a volume/sound quality adjustment amplifier for adjusting the volume, sound quality, or volume and sound quality of a sound signal input from the portable device according to the volume/sound quality adjustment signal from the volume/sound quality adjustment unit, In the above-mentioned connector, in addition to the contact member for the sound signal that transmits the sound signal, it also includes a plurality of contact members for model discrimination that are selectively grounded by the changeover switch, The audio signal contact part of the connector is connected to the signal line of the portable device connection cable via a DC blocking capacitor, and is connected to the volume/sound quality adjustment amplifier via another DC blocking capacitor, The above-mentioned contact part for the sound signal is pulled up to a high potential by the resistor, and the grounding resistor is set to be detachable. The model discriminating unit discriminates the model of the portable device based on the voltage of the model discriminating contact member which changes according to the attachment and detachment state of the ground resistor. 2. A music reproduction device for a portable device, which amplifies the sound signal input from the portable device and outputs it from a loudspeaker, characterized in that it has: A cable for connecting a portable device, having a connector corresponding to the type of the portable device, and inputting the audio signal from the portable device; a model discrimination unit, which discriminates the model of the portable device according to the connected connector; a volume/sound quality adjustment unit that outputs a volume/sound quality adjustment signal for adjusting volume/sound quality according to the model of the portable device discriminated by the model discrimination unit; and, a volume/sound quality adjustment amplifier for adjusting the volume, sound quality, or volume and sound quality of a sound signal input from the portable device according to the volume/sound quality adjustment signal from the volume/sound quality adjustment unit, In the above-mentioned connector, in addition to the contact member for the sound signal that transmits the sound signal, it also includes a plurality of contact members for model discrimination that are selectively grounded by the changeover switch, The audio signal contact part of the connector is connected to the signal line of the portable device connection cable via a DC blocking capacitor, and is connected to the volume/sound quality adjustment amplifier via another DC blocking capacitor, The above-mentioned sound signal contact member is pulled up to a high potential through a resistor, and the grounding resistor is configured to be grounded through a switch, The model discriminating unit discriminates the model of the portable device based on the voltage of the model discriminating contact member which changes according to the on/off state of the switch. 3. A music reproduction device for a portable device, which amplifies the sound signal input from the portable device and outputs it from a loudspeaker, characterized in that it has: A cable for connecting a portable device, having a connector corresponding to the type of the portable device, and inputting the audio signal from the portable device; a model discrimination unit, which discriminates the model of the portable device according to the connected connector; a volume/sound quality adjustment unit that outputs a volume/sound quality adjustment signal for adjusting volume/sound quality according to the model of the portable device discriminated by the model discrimination unit; and, a volume/sound quality adjustment amplifier for adjusting the volume, sound quality, or volume and sound quality of a sound signal input from the portable device according to the volume/sound quality adjustment signal from the volume/sound quality adjustment unit, In addition to the contact parts for the above-mentioned acoustic signals, it also has: The above-mentioned contact parts for model identification are equipped with contact parts for inputting model identification information and contact parts for grounding; One end of the first resistor is pulled up to a high potential, and the other end is connected to the input of the above-mentioned model discrimination unit and the contact member for inputting the above-mentioned model discrimination information; and The second resistor is connected between the contact member for inputting the model discrimination information and the contact member for grounding of the connector on the side of the cable for connecting the portable device, The model discriminating unit discriminates the model of the portable device based on the voltage of the model discriminating information input contact member generated by the first resistor and the second resistor. 4. A music reproduction device for a portable device, which amplifies the sound signal input from the portable device and outputs it from a loudspeaker, characterized in that it has: A cable for connecting a portable device, having a connector corresponding to the type of the portable device, and inputting the audio signal from the portable device; a model discrimination unit, which discriminates the model of the portable device according to the connected connector; a volume/sound quality adjustment unit that outputs a volume/sound quality adjustment signal for adjusting volume/sound quality according to the model of the portable device discriminated by the model discrimination unit; and, a volume/sound quality adjustment amplifier for adjusting the volume, sound quality, or volume and sound quality of a sound signal input from the portable device according to the volume/sound quality adjustment signal from the volume/sound quality adjustment unit, In the above-mentioned connector, in addition to the contact member for transmitting the above-mentioned sound signal, there are also a plurality of contact members for model discrimination selectively short-circuited by a changeover switch, The model discriminating unit discriminates the model of the portable device based on the short-circuit state of the contact member for discriminating the model. 5. The music reproducing apparatus for portable equipment as described in any one of claim 1 to claim 4, wherein The volume/sound quality adjusting unit includes a volume/sound quality setting unit and a volume/sound quality setting memory, and the volume and sound quality setting data are set from the volume/sound quality setting memory based on the discrimination result from the model discrimination unit. to the volume/sound quality setting unit above, The volume/sound quality adjustment amplifier adjusts the volume, sound quality, or volume and sound quality of the audio signal input from the portable device based on the set volume and sound quality setting data. 6. The music reproducing apparatus for portable equipment as described in any one of claim 1 to claim 4, characterized in that, The above-mentioned volume/sound quality adjustment amplifier has a plurality of gain control units that control gain for each sound band, The volume, sound quality, or volume and sound quality of the audio signal input from the portable device are adjusted for each audio frequency band based on the volume/sound quality adjustment signal from the volume/sound quality adjustment unit. 7. The music reproducing apparatus for portable equipment as described in any one of claims 1 to 4, wherein The model discriminating unit stores a reference table in which the model of the portable device is associated with the input signal pattern, and discriminates the model of the portable device based on the input signal pattern. 8. The music reproducing apparatus for portable equipment as described in any one of claims 1 to 4, wherein Equipped with a power supply circuit that receives power from a commercial power supply and generates control power, The power supply circuit is supplied internally as a control power supply, and is also supplied to the portable device as a power source for charging a battery of the portable device. 9. A music reproduction device for a portable device, which amplifies the sound signal input from the portable device and outputs it from a speaker, characterized in that it has: A cable for connecting a portable device, having a connector corresponding to the type of the portable device, and inputting the audio signal from the portable device; a model discrimination unit, which discriminates the model of the portable device according to the connected connector; a volume adjustment unit outputting a volume adjustment signal for adjusting volume according to the model of the portable device discriminated by the model discriminating unit; and a volume adjustment amplifier for adjusting the volume of a sound signal input from the portable device according to the volume adjustment signal from the volume adjustment unit, In the above-mentioned connector, in addition to the contact member for the sound signal that transmits the sound signal, it also includes a plurality of contact members for model discrimination that are selectively grounded by the changeover switch, The audio signal contact part of the connector is connected to the signal line of the portable device connection cable via a DC blocking capacitor, and is connected to the volume/sound quality adjustment amplifier via another DC blocking capacitor, The above-mentioned contact part for the sound signal is pulled up to a high potential by the resistor, and the grounding resistor is set to be detachable. The model discriminating unit discriminates the model of the portable device based on the voltage of the model discriminating contact member which changes according to the attachment and detachment state of the ground resistor. 10. The music reproducing apparatus for portable equipment as claimed in claim 9, wherein: The model discriminating unit stores a reference table in which the model of the portable device is associated with the input signal pattern, and discriminates the model of the portable device based on the input signal pattern. 11. The music reproducing apparatus for portable equipment as claimed in claim 9, wherein: Equipped with a power supply circuit that receives power from a commercial power supply and generates control power, The power supply circuit is supplied internally as a control power supply, and is also supplied to the portable device as a power source for charging a battery of the portable device. 12. A music reproduction device for a portable device, which amplifies the sound signal input from the portable device and outputs it through a speaker, characterized in that it has: A cable for connecting a portable device, having a connector corresponding to the type of the portable device, and inputting the audio signal from the portable device; a model discrimination unit, which discriminates the model of the portable device according to the connected connector; a sound quality adjustment unit outputting a sound quality adjustment signal for adjusting sound quality according to the model of the portable device discriminated by the model discriminating unit; and a sound quality adjustment amplifier for adjusting the sound quality of a sound signal input from the portable device according to the sound quality adjustment signal from the sound quality adjustment unit, In the above-mentioned connector, in addition to the contact member for the sound signal that transmits the sound signal, it also includes a plurality of contact members for model discrimination that are selectively grounded by the changeover switch, The audio signal contact part of the connector is connected to the signal line of the portable device connection cable via a DC blocking capacitor, and is connected to the volume/sound quality adjustment amplifier via another DC blocking capacitor, The above-mentioned contact part for the sound signal is pulled up to a high potential by the resistor, and the grounding resistor is set to be detachable. The model discriminating unit discriminates the model of the portable device based on the voltage of the model discriminating contact member which changes according to the attachment and detachment state of the ground resistor. 13. The music reproducing apparatus for portable equipment as claimed in claim 12, wherein: The model discriminating unit stores a reference table in which the model of the portable device is associated with the input signal pattern, and discriminates the model of the portable device based on the input signal pattern. 14. The music reproducing apparatus for portable equipment as claimed in claim 12, wherein: Equipped with a power supply circuit that receives power from a commercial power supply and generates control power, The power supply circuit is supplied internally as a control power supply, and is also supplied to the portable device as a power source for charging a battery of the portable device. 15. A music reproduction device for a portable device, which amplifies the sound signal input from the portable device and outputs it through a speaker, characterized in that it has: Connector section, a connector for connecting a cable for connecting a portable device, and inputting an audio signal from the above portable device; a model discriminating unit that discriminates the model of the portable device based on a signal input when the connector unit is connected to the connector of the portable device connection cable; a volume/sound quality adjustment unit that outputs an adjustment signal for adjusting the volume/sound quality according to the model of the portable device identified by the model determination unit; and a volume/sound quality adjustment amplifier for adjusting the volume, sound quality, or volume and sound quality of a sound signal input from the portable device according to an adjustment signal from the volume/sound quality adjustment unit, In the above-mentioned connector, in addition to the contact member for the sound signal that transmits the sound signal, it also includes a plurality of contact members for model discrimination that are selectively grounded by the changeover switch, The audio signal contact part of the connector is connected to the signal line of the portable device connection cable via a DC blocking capacitor, and is connected to the volume/sound quality adjustment amplifier via another DC blocking capacitor, The above-mentioned contact part for the sound signal is pulled up to a high potential by the resistor, and the grounding resistor is set to be detachable. The model discriminating unit discriminates the model of the portable device based on the voltage of the model discriminating contact member which changes according to the attachment and detachment state of the ground resistor.

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