JP2010276950A5

JP2010276950A5 - Audio signal receiving apparatus, audio signal reproducing apparatus, and acoustic communication system

Info

Publication number: JP2010276950A5
Application number: JP2009130749A
Authority: JP
Filing date: 2009-05-29
Publication date: 2013-02-07
Anticipated expiration: 2029-05-29

Description

この発明は、オーディオ信号帯域でデータの送受信を行うオーディオ信号受信装置、オーディオ信号再生装置および音響通信システムに関する。 The present invention relates to an audio signal receiving apparatus, an audio signal reproducing apparatus, and an acoustic communication system that transmit and receive data in an audio signal band.

この発明は、データ信号が重畳されたオーディオ信号を再生した場合でも良好な音質で再生が可能なオーディオ信号受信装置、オーディオ信号再生装置および音響通信システムを提供することを目的とする。 An object of the present invention is to provide an audio signal receiving apparatus, an audio signal reproducing apparatus, and an acoustic communication system capable of reproducing with good sound quality even when an audio signal on which a data signal is superimposed is reproduced.

この発明のオーディオ信号受信装置は、高音域がカットされたオーディオ信号に前記高音域に分布するデータ信号が重畳された合成信号を受信する合成信号受信部と、前記合成信号から前記データ信号とオーディオ信号とを分離するフィルタと、分離されたデータ信号からデータ符号を復調するデータ復調部と、分離されたオーディオ信号の前記カットされた高音域を補完する高域拡張部と、前記高音域が補完されたオーディオ信号を出力する出力部と、を備えたことを特徴とする。 Audio signal receiving apparatus of the present invention, a synthesized signal receiving unit treble to receive a combined signal which the data signal is superimposed distributed before Symbol treble in the audio signal that is cut, the data signal from the combined signal A filter that separates the audio signal from the separated data signal, a data demodulator that demodulates a data code from the separated data signal, a high-frequency expansion unit that complements the cut high-frequency range of the separated audio signal, and the high-frequency range And an output unit that outputs an audio signal supplemented with the above.

この発明の音響通信システムは、オーディオ信号の高音域をカットするフィルタと、データ符号を前記高音域に分布する信号に変調したデータ信号を生成するデータ変調部と、前記高音域がカットされたオーディオ信号と前記データ信号とを合成して合成信号を生成する合成部と、この合成信号を送信する送信部と、を有する送信装置と、
前記合成信号を受信する合成信号受信部と、前記合成信号から前記データ信号と前記オーディオ信号とを分離するフィルタと、前記分離されたデータ信号から前記データ符号を復調するデータ復調部と、前記分離されたオーディオ信号の前記カットされた高音域を補完する高域拡張部と、前記高音域が補完されたオーディオ信号を出力する出力部と、を備えたオーディオ信号受信装置と、を含むことを特徴とする。
この発明のオーディオ信号再生装置は、高音域がカットされたオーディオ信号に前記高音域に分布するデータ信号が重畳された合成信号を再生する合成信号再生部と、前記合成信号から前記データ信号とオーディオ信号とを分離するフィルタと、分離されたデータ信号からデータ符号を復調するデータ復調部と、分離されたオーディオ信号の前記カットされた高音域を補完する高域拡張部と、前記高音域が補完された信号を出力する出力部と、を備えたことを特徴とする。 The acoustic communication system according to the present invention includes a filter that cuts a high frequency range of an audio signal, a data modulation unit that generates a data signal in which a data code is modulated into a signal distributed in the high frequency range, and an audio in which the high frequency range is cut A transmission device including a combining unit that combines a signal and the data signal to generate a combined signal, and a transmitting unit that transmits the combined signal;
A synthesized signal receiving unit that receives the synthesized signal; a filter that separates the data signal and the audio signal from the synthesized signal; a data demodulator that demodulates the data code from the separated data signal; and the separation An audio signal receiving device comprising: a high-frequency expansion unit that complements the cut high-frequency range of the audio signal that has been cut; and an output unit that outputs the audio signal supplemented with the high-frequency range. And
An audio signal reproduction device according to the present invention includes a synthesized signal reproducing unit that reproduces a synthesized signal in which a data signal distributed in the high frequency range is superimposed on an audio signal from which the high frequency range is cut, and the data signal and audio from the synthesized signal. A filter that separates the signal, a data demodulator that demodulates the data code from the separated data signal, a high-frequency extension that complements the cut high-frequency range of the separated audio signal, and the high-frequency range is complementary And an output unit for outputting the processed signal.

図面を参照してこの発明の実施形態である音響通信システムについて説明する。図１は、音響通信システムの構成を示す図である。この音響通信システムは、送信装置１、受信装置２で構成されている。送信装置１と受信装置２とは伝送線路５で接続されている。この伝送線路５はデジタル伝送線であってもアナログ信号伝送用のオーディオケーブルであってもよい。 An acoustic communication system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration of an acoustic communication system. This acoustic communication system includes a transmission device 1 and a reception device 2. The transmission device 1 and the reception device 2 are connected by a transmission line 5. The transmission line 5 may be an audio cable for analog signal transmission even digital transmission line.

伝送線路５がアナログ信号用のオーディオケーブル（たとえばシールド線など）の場合、送信部１４はアナログ増幅回路で構成される。伝送線路５がデジタルのオーディオケーブル（たとえば光ファイバ線や同軸ケーブル）の場合、送信部１４はデジタルオーディオ信号のローストリーミング回路で構成される。また、伝送線路５がＬＡＮケーブル（たとえばａＥｔｈｅｒｎｅｔ（登録商標）ケーブル）の場合、送信部１４は、パケットを送受するネットワーク回路で構成される。いずれにしても、上記のオーディオ信号の周波数帯域を処理可能な回路でよい。 When the transmission line 5 is an analog signal audio cable (for example, a shield line), the transmission unit 14 is configured by an analog amplifier circuit. When the transmission line 5 is a digital audio cable (for example, an optical fiber line or a coaxial cable), the transmission unit 14 is configured by a low streaming circuit of a digital audio signal. When the transmission line 5 is a LAN cable (for example, an aEthernet (registered trademark) cable), the transmission unit 14 is configured by a network circuit that transmits and receives packets. In any case, a circuit that can process the frequency band of the audio signal may be used.

この自動演奏ピアノシステムは、以下のように動作する。送信装置１は、自動演奏データを重畳した楽曲を放送する。受信装置２は、この放送を受信して楽曲を再生・放音するとともに、この楽音に重畳されている自動演奏データを復調してデータ処理装置４である自動演奏ピアノに入力する。そうすると、自動演奏ピアノ４は、再生されている楽曲に合わせて生の演奏音を発生する。このように、この音響通信システムによれば、音声放送以外のデータ伝送経路を持たなくても楽音に合わせた自動演奏を実現することが可能になる。 This automatic performance piano system operates as follows. Transmitter 1 broadcasts effortless song superimposed automatic performance data. The receiving device 2 receives this broadcast, reproduces and emits the music, and demodulates the automatic performance data superimposed on the musical sound and inputs it to the automatic performance piano that is the data processing device 4. Then, the automatic performance piano 4 generates a live performance sound according to the music being reproduced. As described above, according to this acoustic communication system, it is possible to realize an automatic performance in accordance with a musical tone without having a data transmission path other than audio broadcasting.

１送信装置
２受信装置
１１，２１ＬＰＦ
１２データ変調部
２２高域拡張部
２４ＨＰＦ
２５データ復調部 1 transmitter 2 receiver 11, 21 LPF
12 Data modulation part 22 High frequency band extension part 24 HPF
25 Data demodulator

Claims

A synthesized signal receiving unit that receives a combined signal which the data signal is superimposed treble are distributed before Symbol treble in the audio signal that is cut,
A filter for separating the data signal and the audio signal from the synthesized signal;
A data demodulator that demodulates a data code from the separated data signal;
A high frequency extension that complements the cut high frequency range of the separated audio signal;
An output unit for outputting an audio signal supplemented with the treble range;
An audio signal receiving apparatus.

A filter that cuts a high frequency range of an audio signal, a data modulation unit that generates a data signal in which a data code is modulated to a signal distributed in the high frequency range, and an audio signal from which the high frequency range is cut and the data signal are combined. And a transmitter having a combiner that generates a combined signal and a transmitter that transmits the combined signal,
A synthesized signal receiving unit that receives the synthesized signal; a filter that separates the data signal and the audio signal from the synthesized signal; a data demodulator that demodulates the data code from the separated data signal; and the separation An audio signal receiving device comprising: a high-frequency expansion unit that complements the cut high-frequency range of the audio signal that is cut; and an output unit that outputs the audio signal supplemented with the high-frequency range;
An acoustic communication system comprising:

A synthesized signal reproduction unit that reproduces a synthesized signal in which a data signal distributed in the high frequency range is superimposed on an audio signal in which the high frequency range is cut;
A filter for separating the data signal and the audio signal from the synthesized signal;
A data demodulator that demodulates a data code from the separated data signal;
A high frequency extension that complements the cut high frequency range of the separated audio signal;
An output unit for outputting a signal supplemented with the high frequency range;
An audio signal reproduction apparatus comprising: