JP2005094265A - Audio player - Google Patents

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JP2005094265A
JP2005094265A JP2003323684A JP2003323684A JP2005094265A JP 2005094265 A JP2005094265 A JP 2005094265A JP 2003323684 A JP2003323684 A JP 2003323684A JP 2003323684 A JP2003323684 A JP 2003323684A JP 2005094265 A JP2005094265 A JP 2005094265A
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frequency component
low frequency
audio signal
audio
speaker
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Takehiko Kuran
武彦 九蘭
Takao Kawasaki
隆生 川崎
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Victor Company of Japan Ltd
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Victor Company of Japan Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an audio player for reducing the occupied band in the case of wirelessly transmitting an audio signal to a speaker for reproducing the audio signal. <P>SOLUTION: A player main body 1 separates the audio signal into a high frequency component and a low frequency component, allows speakers 10a, 10b to reproduce the high frequency component, and wirelessly transmits the low frequency component to a sub-woofer apparatus 2, which reproduces only the low frequency component. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、オーディオ信号を無線でスピーカに伝送して再生するオーディオ再生装置に関する。   The present invention relates to an audio playback apparatus that wirelessly transmits an audio signal to a speaker for playback.

例えば、ステレオ２チャネル（チャンネルとも言う）やマルチチャネルのオーディオ信号を無線でスピーカに伝送して再生することにより、スピーカまでの配線を省略することができたり、また、既存のスピーカより大きなパワーのスピーカを使用することができる。この場合、再生しようとするオーディオ信号のすべての帯域をそのまま、又は、複数の帯域に分割してアナログ無線伝送する。さらに、微弱入力においても復調したオーディオ信号が途切れることなく継続して聴くことができる再生装置としては、下記の特許文献１に記載されているワイヤレス再生装置がある。
特開平９−１１６９７９号公報 For example, stereo 2 channel (also called channel) or multi-channel audio signals are transmitted wirelessly to a speaker and played back, so that wiring to the speaker can be omitted, or the power of the speaker is larger than that of an existing speaker. A speaker can be used. In this case, all the bands of the audio signal to be reproduced are transmitted as they are or divided into a plurality of bands for analog wireless transmission. Furthermore, as a playback device that can continuously listen to a demodulated audio signal without interruption even at a weak input, there is a wireless playback device described in Patent Document 1 below.
JP-A-9-16979

しかしながら、特に高品位のオーディオ信号をリアルタイム伝送する際には常時占有するアナログ無線伝送帯域が大きく、共存する他の無線機器に影響を与えるなど、実用上の大きな問題となっている。有限の無線周波帯域の中において、オーディオ信号をリアルタイムでアナログ無線伝送する再生装置と他の無線機器が共存する場合、前記再生装置が常時占有する帯域を確保した上で、残りの部分を他の機器が利用するため、前記常時占有する帯域はなるべく小さい方が好ましい。   However, particularly when a high-quality audio signal is transmitted in real time, the analog radio transmission band that is always occupied is large, which has a large practical problem such as affecting other coexisting wireless devices. In a finite radio frequency band, when a playback device that performs analog wireless transmission of audio signals in real time and other wireless devices coexist, the bandwidth that the playback device always occupies is secured, and the remaining part is transferred to another Since the device uses it, it is preferable that the band always occupied is as small as possible.

本発明は以上の点に鑑みてなされたもので、有限の無線帯域の中で他の無線機器との共存を考えた場合にも問題となりにくいアナログ無線伝送を行うことができるオーディオ再生装置を提供することを目的とする。   The present invention has been made in view of the above points, and provides an audio reproducing apparatus capable of performing analog wireless transmission that is not problematic even when coexistence with other wireless devices is considered in a limited wireless band. The purpose is to do.

本発明は上記目的を達成するために、オーディオ再生装置本体と外部スピーカ装置とを備え、
前記オーディオ再生装置本体は、
アナログオーディオ信号のうちの第１の周波数以上の高周波成分を抽出する高周波成分抽出手段と、
前記高周波成分を再生するスピーカと、
前記アナログオーディオ信号のうち、前記第１の周波数と同一又は異なる周波数である第２の周波数より低い低周波成分を抽出する低周波成分抽出手段と、
前記第２の周波数より低い前記低周波成分を前記外部スピーカ装置にアナログ無線送信するアナログ無線送信手段とを備え、
前記外部スピーカ装置は、
前記低周波成分をアナログ無線受信するアナログ無線受信手段と、
前記低周波成分を再生するスピーカとを、
備えた構成とした。 In order to achieve the above object, the present invention comprises an audio playback device main body and an external speaker device,
The audio playback device main body is:
High-frequency component extraction means for extracting a high-frequency component of the analog audio signal equal to or higher than the first frequency;
A speaker for reproducing the high-frequency component;
A low frequency component extracting means for extracting a low frequency component lower than a second frequency which is the same as or different from the first frequency from the analog audio signal;
Analog wireless transmission means for performing analog wireless transmission of the low frequency component lower than the second frequency to the external speaker device;
The external speaker device is
Analog wireless receiving means for receiving the low frequency component by analog wireless;
A speaker for reproducing the low frequency component;
The configuration was provided.

この構成により、低周波成分のみを伝送するので、占有帯域を低減させることができる。   With this configuration, only the low frequency component is transmitted, so the occupied band can be reduced.

本発明によれば、低周波成分のみを伝送するので、占有帯域を低減させることができる。   According to the present invention, since only the low frequency component is transmitted, the occupied band can be reduced.

以下、図面を参照して本発明の実施の形態について説明する。図１は本発明に係るオーディオ再生装置の一実施の形態を示すブロック図、図２は図１のオーディオ再生装置の処理を説明するためのフローチャートである。   Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an audio playback apparatus according to the present invention, and FIG. 2 is a flowchart for explaining processing of the audio playback apparatus of FIG.

図１において、このオーディオ再生装置は再生装置本体１及びサブウーハー装置２より構成されている。再生装置本体１はこの例ではノートパソコンであり、Ｌ、Ｒのチャネルをそれぞれ再生するスピーカ１０ａ及び１０ｂと、内部又は外部機器の記憶装置などから取り出したオーディオ信号のうち、ある一定周波数（第１の周波数）以上（０Ｈｚ〜２０ｋＨｚのうちの所定周波数、例えば２００Ｈｚ以上）の成分を取り出してスピーカ１０ａ及び１０ｂに出力する高周波成分抽出装置１２と、オーディオ信号のうち、前記一定周波数と同一又は異なる周波数である第２の周波数より低い周波数であって、概ね１ｋＨｚ以下、好ましくは５００Ｈｚ以下の低周波成分を取り出す低周波成分抽出装置１３と、低周波成分抽出装置１３により取り出された低周波成分のみをサブウーハー装置２にアナログ無線送信するアナログ無線送信装置１１より構成されている。サブウーハー装置２は低周波成分のみをアナログ無線受信するアナログ無線受信装置２０と、アナログ無線受信装置２０で受信した前記低周波成分を再生する低周波成分再生装置（サブウーハー・スピーカ）２１により構成される。なお再生装置本体１とサブウーハー装置２は音楽などを再生する同一の部屋内などに配置されるものとする。   In FIG. 1, the audio reproducing apparatus is composed of a reproducing apparatus main body 1 and a subwoofer apparatus 2. The reproduction apparatus main body 1 is a notebook personal computer in this example, and has a certain fixed frequency (first frequency) among audio signals extracted from speakers 10a and 10b for reproducing L and R channels, respectively, and storage devices of internal or external devices. Frequency) or higher (a predetermined frequency of 0 Hz to 20 kHz, for example, 200 Hz or higher), and outputs to the speakers 10a and 10b, and the audio signal has the same or different frequency from the constant frequency. The low-frequency component extraction device 13 that extracts a low-frequency component that is lower than the second frequency that is approximately 1 kHz or less, preferably 500 Hz or less, and only the low-frequency component extracted by the low-frequency component extraction device 13 It comprises an analog wireless transmission device 11 that performs analog wireless transmission to the subwoofer device 2. It is. The subwoofer device 2 includes an analog wireless receiving device 20 that receives only a low frequency component by analog wireless, and a low frequency component reproducing device (subwoofer speaker) 21 that reproduces the low frequency component received by the analog wireless receiving device 20. Is done. Note that the playback device main body 1 and the subwoofer device 2 are arranged in the same room for playing music or the like.

次に、本実施の形態の動作について図２のフローチャートを併せて参照して説明する。再生装置本体１で再生を開始すると、ステップ１０１で再生装置本体１の内部又は外部機器の記憶装置などからオーディオ信号を読み出す。ステップ２０１では高周波成分抽出装置１２にオーディオ信号が入力され、スピーカ１０ａ及び１０ｂで再生する高周波成分が出力される。そしてステップ２０２ではスピーカ１０ａ及び１０ｂによって高周波成分のオーディオ信号が再生される。   Next, the operation of the present embodiment will be described with reference to the flowchart of FIG. When playback is started in the playback apparatus main body 1, an audio signal is read from the storage apparatus of the playback apparatus main body 1 or an external device in step 101. In step 201, an audio signal is input to the high frequency component extraction device 12, and high frequency components to be reproduced by the speakers 10a and 10b are output. In step 202, high-frequency audio signals are reproduced by the speakers 10a and 10b.

また、ステップ３０１では低周波成分抽出装置１３にオーディオ信号が入力され、サブウーハー装置２において受信、再生する低周波成分が抽出される。続くステップ３０２ではこの低周波成分のみがアナログ無線送信装置１１によって送信される。続くステップ３０３で、この低周波成分のみがサブウーハー装置２側のアナログ無線受信装置２０によって受信され、低周波成分再生装置２１に供給される。そしてステップ３０４でサブウーハー装置２側の低周波成分再生装置２１によって低周波成分のオーディオ信号が再生される。ステップ２０２及びステップ３０４を終了すると、ステップ１０２で再生の継続の要否を判断し、要ならステップ１０１へ戻り、否なら再生を終了する。   In step 301, an audio signal is input to the low frequency component extraction device 13, and low frequency components to be received and reproduced by the subwoofer device 2 are extracted. In subsequent step 302, only the low frequency component is transmitted by the analog wireless transmission device 11. In subsequent step 303, only the low frequency component is received by the analog wireless reception device 20 on the subwoofer device 2 side and supplied to the low frequency component reproduction device 21. In step 304, the low frequency component audio signal is reproduced by the low frequency component reproduction device 21 on the subwoofer device 2 side. When step 202 and step 304 are completed, it is determined in step 102 whether or not it is necessary to continue the reproduction. If necessary, the process returns to step 101.

本発明に係るオーディオ再生装置の一実施の形態を示すブロック図である。1 is a block diagram showing an embodiment of an audio playback device according to the present invention. 図１のオーディオ再生装置の処理を説明するためのフローチャートである。3 is a flowchart for explaining processing of the audio reproduction device of FIG. 1.

符号の説明Explanation of symbols

１ 再生装置本体
２ サブウーハー装置
１０ａ、１０ｂ スピーカ
１１ アナログ無線送信装置
１２ 高周波成分抽出装置
１３ 低周波成分抽出装置
２０ アナログ無線受信装置
２１ 低周波成分再生装置（サブウーハー・スピーカ）
DESCRIPTION OF SYMBOLS 1 Playback apparatus main body 2 Subwoofer apparatus 10a, 10b Speaker 11 Analog wireless transmission apparatus 12 High frequency component extraction apparatus 13 Low frequency component extraction apparatus 20 Analog wireless reception apparatus 21 Low frequency component reproduction apparatus (subwoofer speaker)

Claims (2)

オーディオ再生装置本体と外部スピーカ装置とを備え、
前記オーディオ再生装置本体は、
アナログオーディオ信号のうちの第１の周波数以上の高周波成分を抽出する高周波成分抽出手段と、
前記高周波成分を再生するスピーカと、
前記アナログオーディオ信号のうち、前記第１の周波数と同一又は異なる周波数である第２の周波数より低い低周波成分を抽出する低周波成分抽出手段と、
前記第２の周波数より低い前記低周波成分を前記外部スピーカ装置にアナログ無線送信するアナログ無線送信手段とを備え、
前記外部スピーカ装置は、
前記低周波成分をアナログ無線受信するアナログ無線受信手段と、
前記低周波成分を再生するスピーカとを、
備えたオーディオ再生装置。 An audio playback device main body and an external speaker device;
The audio playback device main body is:
High-frequency component extraction means for extracting a high-frequency component of the analog audio signal equal to or higher than the first frequency;
A speaker for reproducing the high-frequency component;
A low frequency component extracting means for extracting a low frequency component lower than a second frequency which is the same as or different from the first frequency from the analog audio signal;
Analog wireless transmission means for performing analog wireless transmission of the low frequency component lower than the second frequency to the external speaker device;
The external speaker device is
Analog wireless receiving means for receiving the low frequency component by analog wireless;
A speaker for reproducing the low frequency component;
Audio playback device provided. 前記第２の周波数は、１ｋＨｚ近傍であることを特徴とする請求項１に記載のオーディオ再生装置。
The audio reproduction device according to claim 1, wherein the second frequency is in the vicinity of 1 kHz.
JP2003323684A 2003-09-16 2003-09-16 Audio player Withdrawn JP2005094265A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108540907A (en) * 2017-03-06 2018-09-14 西万拓私人有限公司 Method for the frequency distortion for making audio signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108540907A (en) * 2017-03-06 2018-09-14 西万拓私人有限公司 Method for the frequency distortion for making audio signal
CN108540907B (en) * 2017-03-06 2020-09-01 西万拓私人有限公司 Method for distorting the frequency of an audio signal

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