JPH11219172A - Identification information embedding method, preparation method and record medium for musical sound waveform data - Google Patents
Identification information embedding method, preparation method and record medium for musical sound waveform dataInfo
- Publication number
- JPH11219172A JPH11219172A JP10019113A JP1911398A JPH11219172A JP H11219172 A JPH11219172 A JP H11219172A JP 10019113 A JP10019113 A JP 10019113A JP 1911398 A JP1911398 A JP 1911398A JP H11219172 A JPH11219172 A JP H11219172A
- Authority
- JP
- Japan
- Prior art keywords
- waveform data
- identification information
- embedded
- waveform
- musical sound
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、楽音波形データに
識別情報を埋め込む識別情報埋込み方法、作成方法およ
び記録媒体に関するものである。[0001] 1. Field of the Invention [0002] The present invention relates to an identification information embedding method for embedding identification information in musical sound waveform data, a creation method, and a recording medium.
【０００２】近年、ディジタル著作物（画像データ、音
楽データなど）の不正コピー防止等のために、識別情報
（著作権保護のためのＩＤ情報やロゴマーク）などを人
間に知覚できない形の「電子透かし」情報として埋め込
む電子透かし技術が注目されている。In recent years, in order to prevent unauthorized copying of digital works (image data, music data, etc.), identification information (ID information and logo marks for copyright protection) and the like that cannot be perceived by humans have been developed. Digital watermark technology for embedding as "watermark" information has attracted attention.
【０００３】[0003]
【従来の技術】「電子透かし」技術では、ＣＤ等のディ
ジタル音楽データは、その一部分が切り出されて不正利
用された場合でも、そこに埋め込まれているＩＤ情報が
抽出できる必要があるため、音楽データの全体にわたっ
てＩＤ情報を埋め込むようにしている。2. Description of the Related Art According to the "digital watermarking" technique, even if a part of digital music data such as a CD is cut out and illegally used, it is necessary to extract the ID information embedded therein, so ID information is embedded in the entire data.
【０００４】図２には従来の「電子透かし」の手法の一
つが示される。この手法は、スペクトル拡散を使用する
ことにより、著作物全体にＩＤ情報を拡散して埋め込む
ものであり、著作物の劣化を抑え、なおかつ、著作物の
一部からでもＩＤ情報を抽出することが可能である。Ｉ
Ｄ情報の埋込みの手順は、元データを周波数変換（フー
リエ変換、あるいは離散コサイン変換など）した周波数
スペクトル成分に、ＩＤ情報をスペクトル拡散して埋め
込み、その後にその周波数スペクトル成分を逆変換する
ことで、ＩＤ情報を持つデータを作成するものである。FIG. 2 shows one of the conventional "digital watermarking" techniques. In this method, ID information is spread and embedded in the whole work by using spread spectrum, and it is possible to suppress the deterioration of the work and to extract the ID information even from a part of the work. It is possible. I
The procedure for embedding the D information is to spread the ID information into frequency spectrum components obtained by frequency-transforming the original data (such as Fourier transform or discrete cosine transform) and embed the ID information, and then inversely transform the frequency spectrum components. , Data having ID information.
【０００５】不正コピーの可能性のあるデータからＩＤ
情報を抽出するには、図３に示されるように、調べるデ
ータと元データとをそれぞれ周波数変換して周波数スペ
クトル成分にし、この両方の周波数スペクトル成分の差
分を取ることでＩＤ情報を抽出する。調べるデータが、
不正コピーされたＩＤ情報の埋め込まれたデータであれ
ば、差分情報がＩＤ情報となる。一方、調べるデータが
ＩＤ情報を持たないデータであれば、ＩＤ情報は抽出さ
れない。[0005] ID from data that may be illegally copied
In order to extract information, as shown in FIG. 3, the data to be examined and the original data are each frequency-converted into a frequency spectrum component, and the ID information is extracted by taking the difference between the two frequency spectrum components. The data to examine is
In the case of data in which ID information that has been illegally copied is embedded, the difference information is the ID information. On the other hand, if the data to be examined is data having no ID information, no ID information is extracted.
【０００６】[0006]
【発明が解決しようとする課題】音楽データにＩＤ情報
を埋め込む際には、ＩＤ情報を埋め込んだ音楽データを
再生したときに、聴感上の音色の変化がなるべく少ない
ことが望ましいが、従来の手法では、音楽データの全体
にわたりＩＤ情報を埋め込んでいるため、再生した音楽
の音量が小さい部分などでＩＤ情報が雑音となって目立
ち、ある程度音色が劣化することは避けられない。When embedding ID information in music data, it is desirable that a change in audible timbre is as small as possible when the music data in which the ID information is embedded is reproduced. In this case, since the ID information is embedded in the entire music data, it is inevitable that the ID information becomes noticeable as noise in a portion where the volume of the reproduced music is low, and the timbre is deteriorated to some extent.
【０００７】一方、近年、種々の楽音の音色そのもの
（つまり楽音の波形そのもの）も著作権で保護する動向
があり、かかる楽音波形データについても「電子透か
し」の必要性が生じている。On the other hand, in recent years, there has been a trend to protect the timbres of various musical sounds themselves (that is, the waveforms of musical sounds) by copyright, and the necessity of “digital watermarking” also arises for such musical sound waveform data.
【０００８】本発明はかかる事情に鑑みてなされたもの
であり、楽音波形データに聴感上目立たないように識別
情報を埋め込んで、不正コピーの発見等を確実に行える
ようにすることを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to embed identification information in musical tone waveform data so as to be inconspicuous in audibility so that unauthorized copying can be reliably detected. .
【０００９】[0009]
【課題を解決するための手段および作用】上述の課題を
解決するために、本発明に係る楽音波形データの識別情
報埋込み方法は、一つの形態として、楽音の波形データ
のうちの、雑音成分が多くかつ該楽音の音色の特徴をよ
く表している波形部分のみに該識別情報を埋め込むよう
にしたものである。楽音の波形データに識別情報を埋め
込む場合には、波形データ中のどの部分に識別情報を埋
め込むかで音色の劣化の度合いが異なる。波形データ中
の雑音成分の多い部分は、雑音として識別情報を埋め込
んでも、再生時には聴感上目立たず知覚しにくく、音色
の劣化は比較的少ない。またその楽音の音色の特徴を最
もよく表している波形部分に識別情報を埋め込むので、
波形データの不正コピーをしようとする場合に、この特
徴的部分を外して波形データを不正コピーすることは考
えられず、よって波形データに埋め込まれた識別情報に
より、波形データが不正コピーされたものかそうでない
ものかを確実に見分けることができる。According to one aspect of the present invention, there is provided a method for embedding identification information in musical tone waveform data, in which a noise component in waveform data of a musical tone has a noise component. The identification information is embedded only in a large number of waveform parts that well represent the tone characteristics of the musical tone. When the identification information is embedded in the waveform data of the musical tone, the degree of deterioration of the timbre differs depending on which part of the waveform data is embedded with the identification information. Even if identification information is embedded as noise in a portion of the waveform data having a large amount of noise components, it is hardly perceived and hardly perceived at the time of reproduction, and the timbre is relatively little deteriorated. Also, since the identification information is embedded in the waveform portion that best represents the characteristics of the tone of the musical tone,
When attempting to illegally copy the waveform data, it is unlikely that this characteristic portion will be removed and the waveform data will be illegally copied. Therefore, if the waveform data is illegally copied based on the identification information embedded in the waveform data. It is possible to identify whether or not it is.
【００１０】また、本発明に係る楽音波形データの識別
情報埋込み方法は、他の形態として、楽音の波形データ
のうちの振幅が大きくかつ該楽音の音色の特徴をよく表
している波形部分のみに該識別情報を埋め込むようにし
たものである。波形データ中の振幅（音量）の大きい部
分は、振幅の小さい音と大きい音とを同時に聴いたとき
に、小さい音は聴こえにくくなるというマスキング効果
が生じる。このマスキング効果を利用して、音量（振
幅）の大きい部分に音量の小さい雑音としての識別情報
を埋め込むことで、再生時に聴感上目立たず知覚しにく
くでき、音色の劣化は比較的少ない。また上述したよう
に、その楽音の音色の特徴を最もよく表している波形部
分に識別情報を埋め込むので、その識別情報は不正コピ
ーにあたって必ずコピーされ、それにより波形データの
不正コピーを確実に発見できる。According to another aspect of the present invention, there is provided a method of embedding identification information in musical tone waveform data, wherein only the waveform portion of the waveform data of the musical tone has a large amplitude and well represents the characteristics of the timbre of the musical tone. The identification information is embedded. A portion having a large amplitude (volume) in the waveform data has a masking effect that makes it difficult to hear a small sound when a sound having a small amplitude and a sound having a large amplitude are simultaneously heard. By using this masking effect to embed identification information as noise with a small volume in a portion with a large volume (amplitude), it is less noticeable and less perceptible at the time of reproduction, and the timbre is relatively less deteriorated. Further, as described above, since the identification information is embedded in the waveform portion that best represents the characteristics of the tone color of the musical tone, the identification information is always copied in an illegal copy, so that an illegal copy of the waveform data can be reliably detected. .
【００１１】また、本発明に係る楽音波形データの識別
情報埋込み方法は、他の形態として、楽音の波形データ
のうちの、該楽音の立上り部分に相当する波形部分のみ
に該識別情報を埋め込むようにしたものである。アタッ
ク等の立上り部分は他の部分に比べて雑音成分が多く、
かつ振幅が大きい部分であり、さらにその楽音の音色の
特徴を最もよく表している部分であるので、識別情報を
埋め込んでも、再生時に聴感上目立たなくて知覚しにく
く、かつ不正コピーにあたっては必ずコピーされる部分
であるために、不正コピーを確実に発見することができ
る。According to another aspect of the present invention, there is provided a method for embedding identification information in musical tone waveform data, wherein the identification information is embedded only in a waveform portion corresponding to a rising portion of the musical tone in waveform data of the musical tone. It was made. Rising parts such as attacks have more noise components than other parts,
Since it is a part with a large amplitude and the characteristic of the timbre of the musical tone most well, even if the identification information is embedded, it is hard to perceive and is hardly perceived at the time of reproduction even when the identification information is embedded. Because it is a part to be copied, an illegal copy can be reliably detected.
【００１２】また、本発明に係る識別情報を埋め込んだ
楽音波形データの作成方法は、楽音の波形データから立
上り部分を分離する第１のステップと、該分離した立上
り部分の波形データに識別情報を埋め込む第２のステッ
プと、該第１のステップで分離した立上り部分以外の波
形データと、該第２のステップで識別情報が埋め込まれ
た立上り部分の波形データとを合成する第３のステップ
とからなるものである。この作成方法により、楽音波形
データの立上り部分に容易に識別情報を埋め込むことが
できる。Further, according to the present invention, there is provided a method of generating musical tone waveform data in which identification information is embedded, wherein a first step of separating a rising portion from waveform data of a musical tone, and identifying information in the waveform data of the separated rising portion. A second step of embedding, and a third step of synthesizing waveform data other than the rising portion separated in the first step and waveform data of the rising portion in which the identification information is embedded in the second step. It becomes. With this creation method, it is possible to easily embed the identification information in the rising portion of the musical tone waveform data.
【００１３】また、本発明に係る楽音波形データが記録
された機械読取り可能な記録媒体は、楽音の波形データ
のうちの、雑音成分が多くかつ該楽音の音色の特徴をよ
く表している波形部分のみ、振幅が大きくかつ該楽音の
音色の特徴をよく表している波形部分のみ、または該楽
音の立上り部分に相当する波形部分のみに識別情報が埋
め込まれたデータ構造を有する楽音波形データが記録さ
れた構造を有するものである。上述のような楽音波形デ
ータを記録した機械読取り可能な記録媒体は、この構造
の技術的特徴により、この記録媒体が不正コピーされて
も、不正コピー品から識別情報を抽出することで不正コ
ピーを確実に発見することができるから、楽音波形デー
タを記録する記録媒体の不正コピーを防止できるという
技術的効果がある。A machine-readable recording medium on which musical tone waveform data according to the present invention is recorded is characterized in that a waveform portion of a musical tone waveform data which has a large amount of noise components and well represents the characteristics of the tone color of the musical tone. Only tone waveform data having a data structure in which identification information is embedded only in a waveform portion having a large amplitude and well representing the characteristics of the tone color of the musical tone or only in a waveform portion corresponding to a rising portion of the musical tone is recorded. It has a modified structure. Due to the technical characteristics of this structure, even if the recording medium is illegally copied, the machine-readable recording medium on which the above-described musical tone waveform data is recorded can extract the illegal copy by extracting the identification information from the illegally copied product. Since the sound waveform data can be reliably detected, there is a technical effect that illegal copying of a recording medium for recording musical sound waveform data can be prevented.
【００１４】[0014]
【発明の実施の形態】以下、図面を参照して本発明の実
施の形態を説明する。図１は本発明の一実施形態として
の楽音波形データの識別情報埋込み方法に従って識別情
報を埋め込まれた楽音波形データを作成する方法を示す
図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a method of creating musical sound waveform data in which identification information is embedded according to a method of embedding musical sound waveform data identification information according to an embodiment of the present invention.
【００１５】図１において、まず、楽音（楽器音や歌声
などの音声）の元の波形データをアタック部分（立上り
部分）とそれ以外の部分とに分解する。そして、アタッ
ク部分の波形データについて周波数変換（フーリエ変換
あるいは離散コサイン変換など）をした周波数スペクト
ル成分に、ＩＤ（識別子）情報をスペクトル拡散して埋
め込み、その後にその周波数スペクトル成分を逆周波数
変換（逆フリーエ変換あるいは逆離散コサイン変換な
ど）して、ＩＤ情報を持つアタック部分の波形データに
復元する。このＩＤ情報を持つアタック部分の波形デー
タと、先に分離したアタック部分以外の波形データとを
合成して、ＩＤ情報を持つ楽音波形データを復元する。In FIG. 1, first, original waveform data of a musical tone (voice such as a musical instrument sound or a singing voice) is decomposed into an attack portion (rising portion) and other portions. Then, ID (identifier) information is spectrally spread and embedded in frequency spectrum components obtained by performing frequency conversion (Fourier transform or discrete cosine transform, etc.) on the waveform data of the attack portion, and then the frequency spectrum components are subjected to inverse frequency transform (reverse frequency transform). Then, the waveform data of the attack portion having the ID information is restored by performing a freeier transform or an inverse discrete cosine transform. The waveform data of the attack portion having the ID information and the waveform data of the portion other than the previously separated attack portion are combined to restore the tone waveform data having the ID information.
【００１６】楽音の波形データにＩＤ情報を埋め込む場
合には、波形データ中のどの部分にＩＤ情報を埋め込む
かで音色の劣化の度合いが異なる。波形データのアタッ
ク部分は他の部分に比べて雑音成分が多く、かつ振幅が
大きい部分であるので、ＩＤ情報を埋め込んでも、再生
時に聴感上目立たなく知覚しにくい。すなわち、雑音成
分の多い部分は、雑音としてＩＤ情報を埋め込んでも、
知覚しにくい。また、振幅（音量）の大きい部分にＩＤ
情報を埋め込んだ場合、振幅の小さい音と大きい音とを
同時に聴いたときに、小さい音は聴こえにくいというマ
スキング効果が生じることを利用でき、音量の大きい部
分に音量の小さい雑音としてのＩＤ情報を埋め込んで
も、知覚しにくくなる。したがって、楽音の波形データ
のアタック部分にＩＤ情報を埋め込んでも、音色の劣化
は比較的少ない。When embedding the ID information in the waveform data of the musical tone, the degree of deterioration of the timbre differs depending on in which part of the waveform data the ID information is embedded. Since the attack part of the waveform data has a larger noise component and a larger amplitude than other parts, even if the ID information is embedded, it is hardly perceptible and hard to perceive during reproduction. That is, even if the ID information is embedded as noise in a portion with many noise components,
Hard to perceive. Also, the ID with the large amplitude (volume)
When the information is embedded, it is possible to use the fact that when listening to a sound with a small amplitude and a large sound at the same time, a masking effect that a small sound is hard to hear is generated. Even if embedded, it becomes difficult to perceive. Therefore, even if the ID information is embedded in the attack portion of the waveform data of the musical tone, the deterioration of the timbre is relatively small.
【００１７】これに加えて、アタック部分はその楽音の
音色の特徴を最もよく表している部分であるので、波形
データの不正コピーをしようとする場合に、このアタッ
ク部分を外して波形データを不正コピーすることは考え
られず、よって波形データに埋め込まれた識別情報によ
り、波形データが不正コピーされたものかそうでないも
のかを確実に見分けることができる。なお、ＩＤ情報の
抽出方法は、前述の従来技術の項で説明したものと同じ
手法でよい。In addition, since the attack portion is the portion that best represents the characteristics of the tone of the musical tone, when attempting to copy the waveform data illegally, the attack portion is removed and the waveform data is illegally copied. Copying is not conceivable, and therefore, the identification information embedded in the waveform data makes it possible to reliably determine whether the waveform data has been illegally copied or not. Note that the method of extracting the ID information may be the same method as that described in the section of the related art.
【００１８】本発明の実施にあたっては、種々の変形形
態が可能である。上述の実施例では、楽音のアタック部
分に識別情報を埋め込んでいる。これはアタック部分が
雑音が多くかつ振幅が大きく、さらに楽音の音色の特徴
的部分であるという条件を全て満たしているため、最も
好適であるからである。しかし、本発明はこれに限られ
るものではなく、楽音の音色の特徴的部分でありかつ雑
音が多い波形部分のみに、あるいは楽音の音色の特徴的
部分でありかつ振幅が大きい波形部分のみに、識別情報
を埋め込むものであってもよい。In implementing the present invention, various modifications are possible. In the above embodiment, the identification information is embedded in the attack part of the musical sound. This is because the attack portion is most preferable because it satisfies all the conditions that the attack portion is noisy and has a large amplitude and is a characteristic portion of the tone color of a musical tone. However, the present invention is not limited to this, only in the characteristic part of the tone of the musical tone and the waveform part with much noise, or only in the characteristic part of the tone of the musical tone and the waveform part with a large amplitude, Identification information may be embedded.
【００１９】また、上述の実施例では、元の波形データ
をアタック部分とそれ以外の部分とに分離してからアタ
ック部分に識別情報を埋め込むようにしたが、分離をせ
ずにアタック部分のみに識別情報を埋め込むような波形
データの作成方法であってもよい。なお、楽音を２以上
の部分構成音（ここではアタック部分とそれ以外の部
分）で構成し、これらを合成して最終的に一つの楽音と
するような電子楽器の場合には、波形データはもともと
アタック部分とそれ以外の部分とに分けられているか
ら、識別情報を埋め込むにあたって、アタック部分を分
離するステップは不要となる。In the above-described embodiment, the original waveform data is separated into an attack part and other parts, and then the identification information is embedded in the attack part. A method of creating waveform data in which identification information is embedded may be used. In the case of an electronic musical instrument in which a musical sound is composed of two or more partial constituent sounds (an attack part and other parts in this case), and these are synthesized to finally form one musical sound, the waveform data is Since it is originally divided into an attack part and other parts, a step of separating the attack part is unnecessary when embedding the identification information.
【００２０】本発明の識別情報埋込み方法により識別情
報を埋め込んだデータ構造を有する楽音波形データは、
シーケンサや電子楽器などに予めプリセットデータとし
て記録しておく他、フロッピィディスク、カセットテー
プ、ＲＯＭカセット、ＣＤ−ＲＯＭなどの、コンピュー
タやプレーヤなどによる機械読取り可能な記録媒体に記
録して、市場で流通することができる。これにより、こ
の楽音波形データを記録した構造を有する記録媒体の不
正コピーを確実に発見できる。The tone waveform data having the data structure in which the identification information is embedded by the identification information embedding method of the present invention is:
In addition to being recorded in advance as preset data on a sequencer or electronic musical instrument, etc., it is also recorded on floppy disks, cassette tapes, ROM cassettes, CD-ROMs, and other machine-readable recording media such as computers and players, and distributed in the market. can do. As a result, an unauthorized copy of the recording medium having the structure in which the musical tone waveform data is recorded can be reliably found.
【００２１】[0021]
【発明の効果】本発明によれば、楽音波形データに聴感
上目立たないように識別情報を埋め込むことができ、か
つ不正コピーにあたってその識別情報を埋め込んだ部分
は必ずコピーされるから、不正コピーを確実に発見でき
る。According to the present invention, it is possible to embed the identification information in the musical sound waveform data so as to be inconspicuous in the sense of hearing, and to copy the part in which the identification information is embedded without fail in illegal copying. Can be found reliably.
【図１】本発明の一実施形態としての楽音波形データの
識別情報埋込み方法による楽音波形データの作成方法を
説明する図である。FIG. 1 is a diagram illustrating a method of creating musical sound waveform data by a method of embedding musical sound waveform data identification information according to an embodiment of the present invention.
【図２】従来の識別情報を埋め込んだデータの作成方法
を説明する図である。FIG. 2 is a diagram illustrating a conventional method for creating data in which identification information is embedded.
【図３】識別情報を埋め込んだデータから識別情報を抽
出する方法を説明する図である。FIG. 3 is a diagram illustrating a method for extracting identification information from data in which the identification information is embedded.
Claims (5)
くかつ該楽音の音色の特徴をよく表している波形部分の
みに該識別情報を埋め込むようにした楽音波形データの
識別情報埋込み方法。1. A method for embedding identification information in musical sound waveform data, wherein the identification information is embedded only in a waveform portion of a musical tone waveform data which has a large amount of noise components and well represents characteristics of the timbre of the musical tone.
かつ該楽音の音色の特徴をよく表している波形部分のみ
に該識別情報を埋め込むようにした楽音波形データの識
別情報埋込み方法。2. A method for embedding identification information of musical sound waveform data, wherein the identification information is embedded only in a waveform portion of the waveform data of the musical tone having a large amplitude and well representing characteristics of the timbre of the musical tone.
り部分に相当する波形部分のみに該識別情報を埋め込む
ようにした楽音波形データの識別情報埋込み方法。3. A method for embedding identification information of musical sound waveform data, wherein the identification information is embedded only in a waveform portion corresponding to a rising portion of the musical tone in waveform data of the musical tone.
る第１のステップと、 該分離した立上り部分の波形データに識別情報を埋め込
む第２のステップと、 該第１のステップで分離した立上り部分以外の波形デー
タと、該第２のステップで識別情報が埋め込まれた立上
り部分の波形データとを合成する第３のステップとから
なる識別情報を埋め込んだ楽音波形データの作成方法。4. A first step of separating a rising portion from waveform data of a musical tone, a second step of embedding identification information in the waveform data of the separated rising portion, and a rising portion separated in the first step. And a third step of synthesizing the waveform data other than the above and the rising edge waveform data in which the identification information is embedded in the second step.
くかつ該楽音の音色の特徴をよく表している波形部分の
み、振幅が大きくかつ該楽音の音色の特徴をよく表して
いる波形部分のみ、または該楽音の立上り部分に相当す
る波形部分のみに識別情報が埋め込まれたデータ構造を
有する楽音波形データが記録された構造を有する機械読
取り可能な記録媒体。5. A waveform portion of waveform data of a musical tone which has a large amount of noise components and well represents characteristics of the timbre of the musical tone has a large amplitude and a waveform portion which well represents the characteristics of the timbre of the musical tone. A machine-readable recording medium having a structure in which tone waveform data having a data structure in which identification information is embedded only in a waveform portion corresponding to a rising portion of the musical tone is recorded.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01911398A JP3935258B2 (en) | 1998-01-30 | 1998-01-30 | Identification information embedding method and creation method of musical sound waveform data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01911398A JP3935258B2 (en) | 1998-01-30 | 1998-01-30 | Identification information embedding method and creation method of musical sound waveform data |
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| Publication Number | Publication Date |
|---|---|
| JPH11219172A true JPH11219172A (en) | 1999-08-10 |
| JP3935258B2 JP3935258B2 (en) | 2007-06-20 |
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ID=11990433
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Cited By (3)
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|---|---|---|---|---|
| WO2001093264A1 (en) * | 2000-05-31 | 2001-12-06 | Sony Corporation | Recording medium, recording method of recording medium, recording and/or reproducing method of recording medium, and data copy control method |
| WO2015151678A1 (en) * | 2014-03-31 | 2015-10-08 | 培雄 唐沢 | Method for transmitting arbitrary signal using acoustic piece |
| WO2019208067A1 (en) * | 2018-04-24 | 2019-10-31 | KARASAWA Masuo | Method for inserting arbitrary signal and arbitrary signal insert system |
-
1998
- 1998-01-30 JP JP01911398A patent/JP3935258B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001093264A1 (en) * | 2000-05-31 | 2001-12-06 | Sony Corporation | Recording medium, recording method of recording medium, recording and/or reproducing method of recording medium, and data copy control method |
| US7434055B2 (en) | 2000-05-31 | 2008-10-07 | Sony Corporation | Recording medium, recording method of recording medium, recording and/or reproducing method of recording medium, and data copy control method |
| WO2015151678A1 (en) * | 2014-03-31 | 2015-10-08 | 培雄 唐沢 | Method for transmitting arbitrary signal using acoustic piece |
| JP2015197497A (en) * | 2014-03-31 | 2015-11-09 | 培雄 唐沢 | Transmission method of arbitrary signal using sound |
| CN106211799A (en) * | 2014-03-31 | 2016-12-07 | 唐泽培雄 | Use the transmission method of the arbitrary signal of the sound |
| US10134407B2 (en) | 2014-03-31 | 2018-11-20 | Masuo Karasawa | Transmission method of signal using acoustic sound |
| CN106211799B (en) * | 2014-03-31 | 2019-11-29 | 唐泽培雄 | Use the transmission method of the arbitrary signal of the sound |
| WO2019208067A1 (en) * | 2018-04-24 | 2019-10-31 | KARASAWA Masuo | Method for inserting arbitrary signal and arbitrary signal insert system |
| US20210241740A1 (en) * | 2018-04-24 | 2021-08-05 | Masuo Karasawa | Arbitrary signal insertion method and arbitrary signal insertion system |
| US11817070B2 (en) | 2018-04-24 | 2023-11-14 | Masuo Karasawa | Arbitrary signal insertion method and arbitrary signal insertion system |
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|---|---|
| JP3935258B2 (en) | 2007-06-20 |
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