WO2007063772A1 - Appareil de transmission de signal, son procede et appareil audio - Google Patents

Appareil de transmission de signal, son procede et appareil audio Download PDF

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Publication number
WO2007063772A1
WO2007063772A1 PCT/JP2006/323430 JP2006323430W WO2007063772A1 WO 2007063772 A1 WO2007063772 A1 WO 2007063772A1 JP 2006323430 W JP2006323430 W JP 2006323430W WO 2007063772 A1 WO2007063772 A1 WO 2007063772A1
Authority
WO
WIPO (PCT)
Prior art keywords
phase
content data
signal
amplifier
analog signal
Prior art date
Application number
PCT/JP2006/323430
Other languages
English (en)
Japanese (ja)
Inventor
Shinjiro Kato
Mitsuo Nakazato
Moriyuki Oshima
Original Assignee
Pioneer Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pioneer Corporation filed Critical Pioneer Corporation
Publication of WO2007063772A1 publication Critical patent/WO2007063772A1/fr

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/09—A balun, i.e. balanced to or from unbalanced converter, being present at the output of an amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/372—Noise reduction and elimination in amplifier

Definitions

  • the present invention relates to a signal transmission device, a method thereof, and an audio device for converting content data of a digital signal into an analog signal and outputting it from a speaker.
  • the voltage of the center tap of the primary coil of the isolated transformer is input to the isolator unit that is interposed between the cassette Z receiver unit and the high-power amplifier.
  • a power control signal generation circuit is provided for detecting the presence or absence of a DC component contained in the output of the cassette / receiver unit and outputting a power control signal to the high power amplifier unit at the subsequent stage.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 7-303013
  • Patent Document 2 JP-A-8-70234
  • the present invention has one object to provide a signal transmission device, a method thereof, and an audio device that can be transmitted favorably without impairing the characteristics of content data. To do.
  • the signal transmission device of the present invention includes a positive phase converter that converts digital signal content data into an analog signal, and an analog signal that is opposite in phase to the analog signal that converts the content data by the positive phase converter.
  • a negative phase amplifier that amplifies the content data of the analog signal that is reversely sent and converted by the negative phase converter and outputs the amplified content data to the speaker.
  • a signal transmission method of the present invention is a signal transmission method for converting digital signal content data into an analog signal and outputting it from a speaker, wherein the digital signal content data is transmitted in the normal phase and in reverse.
  • the analog signal is converted into two analog signals, the converted analog signal content data is amplified by an amplifier, and the amplified analog signal content data is output to the speaker.
  • An acoustic device of the present invention includes the signal transmission device of the present invention described above and a speaker that produces content data of an analog signal output from the signal transmission device.
  • FIG. 1 is a block diagram showing a schematic configuration of an acoustic device according to an embodiment of the present invention.
  • a sound device as a signal transmission device
  • Second power amplifier as a negative phase amplifier
  • FIG. 1 is a block diagram showing a part of a schematic configuration of an audio device according to an embodiment of the present invention.
  • reference numeral 100 denotes an audio device as a signal transmission device according to an embodiment of the present invention, and the audio device 100 outputs a sound of content data reproduction output device power that outputs sound data as content data of a digital signal.
  • the acoustic device 100 includes a source device 200, an amplifier device 300, and a speaker 400.
  • the content data reproduction / output device includes a drive and a driver for reading digital signal content data recorded on various recording media such as an optical disk, a magnetic disk, a magneto-optical disk, and a memory card.
  • a configuration may be provided that includes a tuner that receives digital broadcast signals such as terrestrial and satellite waves. Then, the content data reproduction / output device outputs the content data of the digital signal acquired from the recording medium or the broadcast wave to the audio device 100 via a cable (not shown).
  • the source device 200 acquires sound data output via a cable from the content data reproduction output device, and appropriately converts it into an analog signal.
  • the source device 200 includes a case body 210 that is formed in a substantially box shape using, for example, a metal plate or a synthetic resin plate.
  • the case body 210 is connected to a content data playback / output device with a cable connected thereto, and a source input terminal (not shown) that obtains output sound data and a source output terminal that forms a pair that outputs the converted analog signal sound data.
  • 211 and 212 are provided. For example, when the sound data has a plurality of channels, the source output terminals 211 and 212 are provided in pairs corresponding to the number of channels.
  • Case body 210 is grounded to chassis 10 of the vehicle.
  • the source device 200 includes a normal phase digital-analog (DZA) converter 221 as a normal phase converter and a negative phase DZA converter 222 as a negative phase converter, which are disposed in the case body 210.
  • DZA digital-analog
  • the positive phase DZA converter 221 converts the sound data of the digital signal input to the input terminal into sound data of an analog signal.
  • the converter 222 converts the sound data of the digital signal input to the input terminal into sound data of an analog signal so that the phase is opposite to the phase converted by the normal phase DZA converter 221.
  • the normal phase DZ A converter 221 and the reverse feed DZA converter 222 are grounded to the case body 210, respectively. That is, the normal phase DZA converter 221 and the reverse feed DZA converter 222 are grounded to the chassis 10 of the vehicle via the case body 210.
  • the source device 200 includes a first output circuit 231 as a positive phase amplifier and a second output circuit 232 as a negative phase amplifier.
  • the first output circuit 231 and the second output circuit 232 are signals corresponding to input operations with various operating means such as control knobs and switches (not shown) provided on the case body 210 so that the user can appropriately perform input operations.
  • the sound characteristics of the normal-phase and reverse-phase sound data of the analog signal are adjusted. Specifically, the output volume and sound quality are adjusted.
  • the first output circuit 231 and the second output circuit 232 have the same configuration, and the sound data of the normal phase and the reverse phase are adjusted equally.
  • the first output circuit 231 and the second output circuit 23 2 are connected to a pair of source output terminals 211 and 212, respectively, and output sound data with adjusted sound characteristics to the source output terminals 211 and 212, respectively. To do. Further, the first output circuit 231 and the second output circuit 232 are grounded to the case body 210, respectively. That is, the first output circuit 231 and the second output circuit 232 are grounded to the vehicle chassis 10 via the case body 210.
  • the amplifier device 300 amplifies the sound data of the analog signal output from the source device 200 as appropriate and outputs it to the speaker 400.
  • the amplifier device 300 includes a housing 310 formed in a substantially box shape using, for example, a metal plate or a synthetic resin plate.
  • the housing 310 is connected to the source device 200 via signal lines 501, 502, and a pair of amplifier input terminals 311, 312 to which the analog signal sound data output from the source device 200 is input, and Amplifier output terminals 321 and 322 are provided for outputting the sound data of the amplified analog signal.
  • the amplifier input terminals 311, 312 and the amplifier output terminals 321, 322 are provided in pairs corresponding to the source output terminals 211, 212, that is, in pairs corresponding to the number of sound data channels.
  • the amplifier device 300 includes a first power amplifier 331 as a normal phase amplifier and a second power amplifier 332 as a negative phase amplifier, which are disposed in the housing 310. Yes.
  • the first power amplifier 331 appropriately amplifies the sound data of the positive phase analog signal input to the amplifier input terminal 311 and outputs it to the amplifier output terminal 321.
  • the second power amplifier 332 appropriately amplifies the sound data of the reverse phase analog signal input to the amplifier input terminal 312, and outputs it to the amplifier output terminal 322.
  • the first power amplifier 331 and the second power amplifier 332 have the same configuration, and amplify the sound data of the normal phase and the reverse phase respectively.
  • the first power amplifier 331 and the second power amplifier 332 are each grounded to the housing 310. That is, the first power amplifier 331 and the second power amplifier 332 are grounded to the chassis 10 of the vehicle via the housing 310.
  • Speaker 400 is disposed in the vehicle.
  • the speakers 400 are appropriately arranged in the vehicle in a number corresponding to the number of channels of sound data.
  • the speaker 400 is connected to the amplifier output terminals 321 and 322 of the amplifier device 300 via the wires 511 and 512, respectively. Play the data with sound.
  • the content data reproduction output device outputs the sound data to the source device 200 via a cable (not shown).
  • the input digital signal sound data is converted into analog signal sound data by the normal phase DZ A converter 221, and the phase converted by the negative phase DZA converter 222 by the normal phase DZA converter 221 is used. Convert to analog phase sound data in reverse phase.
  • source device 200 and amplifier device 300 are grounded with vehicle chassis 10 as ground.
  • vehicles are equipped with electrical equipment such as generators and fuel injection devices for driving the vehicle, and electrical equipment such as headlamps and wipers for supporting travel. Grounded to 10. Therefore, the noise voltage from each electrical device is applied to chassis 10 and this noise is applied.
  • the voltage causes a potential difference between the ground position of the source device 200 and the ground position of the amplifier device 300, and this potential difference is superimposed on the sound data of the analog signal. Specifically, if the sound data of the analog signal is Vp and the noise is Vn, the sound data of the normal phase is (Vp + Vn) and the sound data of the reverse phase is ( ⁇ Vp + Vn).
  • the normal-phase sound data and the reverse-phase sound data on which the noise is superimposed are sounded by the first output circuit 231 and the second output circuit 232 according to the setting contents according to the user's input operation.
  • the sound characteristics of the data are adjusted in the same way.
  • the sound data of the normal phase and the reverse phase adjusted by the first output circuit 231 and the second output circuit 232 are output from the source output terminals 211 and 212, and are amplified via the signal lines 501 and 502, respectively.
  • the signals are input to the amplifier input terminals 3 11 and 312 of the apparatus 300, respectively.
  • the first-phase power amplifier 331 and the second-power amplifier 332 amplify the sound data of the input analog signal in the normal phase and the reverse phase, respectively, and the respective amplifier output terminals Output to speaker 400 via wires 511 and 512 from 321, 322 force.
  • noise is superimposed on the sound data of the analog signal, so that it is relatively amplified together with the noise.
  • the amplification coefficient is K
  • the normal phase sound data is amplified to (K (Vp + Vn)
  • the reverse phase sound data is amplified to (K (one Vp + Vn)).
  • the amplified normal phase and reverse phase sound data is not output to the speaker 400 because the noise component is in phase, and the sound data is output substantially at 2 KVp. Become. That is, the speaker 400 itself exhibits the same operation as the differential amplifier.
  • the sound data of the digital signal is converted into an analog signal by the normal phase DZA converter 221, and the phase that is opposite to the phase that is converted by the normal phase DZA converter 221 is reversed to the phase DZA.
  • the converter 222 converts the signal into an analog signal.
  • These converted normal-phase and negative-phase sound data are amplified by the first power amplifier 331 and the second power amplifier 332, respectively, and output to the speaker 400.
  • the sound data is converted into a normal phase and a reverse phase, respectively. Only the sound data is generated and the speaker 400 itself functions as a differential amplifier, so that noise can be appropriately removed without impairing the sound characteristics of the sound data, and good sound data can be reproduced.
  • the source device 200 that converts the sound data into an analog signal for reproduction by the speaker 400 and the amplifier device 300 that amplifies the sound data are grounded to the chassis 10 of the vehicle on which the speaker 400 is mounted. Therefore, when the analog signal sound data converted by the source device 200 is balanced and transmitted to the amplifier device 300 through the signal lines 501, 502, the source device 200 and the amplifier device 300 force noise voltage is applied to the chassis 10 Even if the noise is superimposed on the sound data to be transmitted in balance and amplified to the noise by the amplifier, the noise can be removed appropriately without impairing the sound characteristics of the sound data. .
  • the chassis 10 that grounds the source device 200 and the amplifier device 300 is a vehicle, a generator or a fuel injection device for driving the vehicle, a head lamp or a wiper for supporting the driving, etc. Since various electric devices are mounted on the vehicle and these electric devices are also grounded to the chassis 10, a noise voltage is applied to the chassis 10, and this noise voltage is superimposed on the sound data transmitted in a balanced manner. Therefore, it is particularly effective for such usage forms.
  • the DZA converter is connected in parallel to a state in which the sound data of analog signals having opposite phases are converted into a normal phase DZA converter 221 and a reverse phase DZ A converter 222, and the first of the same configuration is connected in series to these.
  • the first output amplifier 331 and the second power amplifier 332 having the same configuration are connected through the signal lines 501, 502 by connecting the output circuit 231 and the second output circuit 232 of the same, respectively, and adjusting the sound characteristics equally.
  • the normal phase sound data and the reverse phase sound data converted by the source device 200 are amplified equally by the amplifier device 300 and output to the speaker 400. For this reason, each sound data in the normal phase and the reverse phase is output to the speaker 400 with the same sound characteristics, so that only the noise in phase is output and the sound characteristics are not impaired and are reproduced appropriately. Can be obtained with a simple configuration.
  • acoustic device 100 mounted on the vehicle as described above, it can be applied to a configuration installed in a house or a building in addition to the acoustic device mounted on various moving bodies.
  • the power described as the acoustic device 100 for reproducing sound data For example, various types of content data such as image data can be targeted.
  • source device 200 and the amplifier device 300 have been described as separate configurations, they may be configured to be housed in the same casing.
  • the force described by connecting the first output circuit 231 and the second output circuit 232 in series to the positive phase DZ A converter 222 and the negative phase DZA converter 222 is not limited to this configuration.
  • sound data whose sound characteristics have been adjusted in advance at the time of a digital signal may be converted to an analog signal by a normal phase DZA converter 221 and a negative phase DZ A converter 222 and output to the amplifier device 300. .
  • the sound data of the digital signal is converted into an analog signal by the normal phase DZA converter 221, and the phase that is opposite to the phase that is converted by the normal phase DZA converter 221 is reversed to the phase DZA.
  • the converter 222 converts the signal into an analog signal.
  • These converted normal-phase and negative-phase sound data are amplified by the first power amplifier 331 and the second power amplifier 332, respectively, and output to the speaker 400.
  • the sound data is converted into a normal phase and a reverse phase, so that the noise in the same phase is not produced by the speaker 400, and the sound data is out of phase. Only the sound is produced, and the speaker 400 functions like a differential amplifier, so that noise can be appropriately removed without impairing the sound characteristics of the sound data, and good sound data can be reproduced.
  • the present invention can be used for a signal transmission device, a method thereof, and an audio device for converting content data of a digital signal into an analog signal and outputting the analog signal.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

La présente invention concerne un convertisseur N/A de phase positive (221) qui convertit un signal numérique de données audio en signal analogique, tandis qu'un convertisseur N/A de phase négative (222) convertit le signal numérique des données audio en un signal analogique ayant une phase opposée au signal analogique tel que converti par le convertisseur N/A de phase positive (221). Ces signaux analogiques de données audio ayant des phases positive et négative sont alors également amplifiés par un premier amplificateur de puissance (331) et un second amplificateur de puissance (332), respectivement, puis sortis sur un haut-parleur (400). Même si du bruit est superposé sur les données audio, le haut-parleur (400) n'émet pas de composants de bruit en phase mais des sons à partir des données audio ayant des phases différentes. Ainsi, le haut-parleur (400) lui-même fonctionne comme un amplificateur différentiel, moyennant quoi les composants de bruit peuvent être correctement supprimés sans dégrader les caractéristiques audio, entraînant une excellente reproduction des données audio.
PCT/JP2006/323430 2005-12-01 2006-11-24 Appareil de transmission de signal, son procede et appareil audio WO2007063772A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005-348115 2005-12-01
JP2005348115 2005-12-01

Publications (1)

Publication Number Publication Date
WO2007063772A1 true WO2007063772A1 (fr) 2007-06-07

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ID=38092107

Family Applications (1)

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PCT/JP2006/323430 WO2007063772A1 (fr) 2005-12-01 2006-11-24 Appareil de transmission de signal, son procede et appareil audio

Country Status (1)

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WO (1) WO2007063772A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130243223A1 (en) * 2012-03-16 2013-09-19 Rohm Co., Ltd. Audio signal processing circuit, car audio apparatus using the same, audio component apparatus, electronic device and output audio signal generating method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05235653A (ja) * 1992-02-21 1993-09-10 Rohm Co Ltd Ｂｔｌ増幅装置
JPH06138103A (ja) * 1992-10-19 1994-05-20 Kankyo Kogaku Kenkyusho:Kk 道路舗装の透水性能試験方法及び装置
JP2003133959A (ja) * 2001-10-29 2003-05-09 Sony Corp Ｄ／ａ変換器および出力増幅回路
JP2003152468A (ja) * 2001-11-19 2003-05-23 Sony Corp パワーアンプ
JP2004048333A (ja) * 2002-07-11 2004-02-12 Victor Co Of Japan Ltd Ｐｗｍ変調方式ｄ級アンプ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05235653A (ja) * 1992-02-21 1993-09-10 Rohm Co Ltd Ｂｔｌ増幅装置
JPH06138103A (ja) * 1992-10-19 1994-05-20 Kankyo Kogaku Kenkyusho:Kk 道路舗装の透水性能試験方法及び装置
JP2003133959A (ja) * 2001-10-29 2003-05-09 Sony Corp Ｄ／ａ変換器および出力増幅回路
JP2003152468A (ja) * 2001-11-19 2003-05-23 Sony Corp パワーアンプ
JP2004048333A (ja) * 2002-07-11 2004-02-12 Victor Co Of Japan Ltd Ｐｗｍ変調方式ｄ級アンプ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130243223A1 (en) * 2012-03-16 2013-09-19 Rohm Co., Ltd. Audio signal processing circuit, car audio apparatus using the same, audio component apparatus, electronic device and output audio signal generating method
US9143104B2 (en) * 2012-03-16 2015-09-22 Rohm Co., Ltd. Audio signal processing circuit, car audio apparatus using the same, audio component apparatus, electronic device and output audio signal generating method

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