JP4708898B2 - Digital watermark information embedded music information distribution system - Google Patents

Description

  In the present invention, by incorporating digital watermark information into a stereo sound source, a mechanism is constructed in which a user can easily extract various information such as the artist name, music title, and publication record company related to the stereo sound source.

  Conventionally, when a variety of information about the sound source such as artist name, music title, and publishing record company is embedded in the sound source and distributed, it has been done using a dedicated music format. In the format, there is a part that embeds various information for sound sources such as the name of the artist, the name of the sound source, and the publishing record company, independent of the sound source information, at the beginning of the data, generally called a header.

  Therefore, in order for the sound source user to extract various information about the sound source such as artist name, music title, and publishing record company embedded in the sound source, the sound source information is saved and embedded in the header from the saved sound source information. We had to use a device with dedicated hardware and software to extract the information.

  Therefore, it does not store sound sources such as music played on TV, radio, cable, concerts, etc., and sound sources such as artist names, song names, and publishing record companies are in sound sources that are being listened to by users or viewers. It was impossible to embed and distribute various information for.

  Therefore, even if the user or viewer is a sound source of a musical piece that has a favorable feeling for a sound source that is being listened to without saving the sound source, such as music played on television, radio, cable, concerts, etc., It was difficult to obtain information such as artist name, song name, and publishing record company.

In order to solve the above-described problem , the present invention converts digital watermark information into a sound source to generate a first digital watermark information sound source, and a second digital watermark having a phase opposite to that of the first digital watermark information sound source. A digital watermark sound source generating means for generating an information sound source; a digital watermark sound source embedding means for embedding the first digital watermark information sound source in one of a pair of left and right sound sources, and embedding the second digital watermark information sound source in the other; Sound source output means for outputting the pair of left and right sound sources, and collecting sound so that either one of the pair of left and right sound sources is strong, and from the collected sound source, the first digital watermark information sound source or the second A digital watermark sound source decoding means for extracting the digital watermark information sound source, and a digital watermark information display means for displaying the extracted first digital watermark information sound source or the second digital watermark information sound source, To provide an electronic watermark information embedded music information delivery system comprising.

  Embodiments of an electronic watermark information embedded music information distribution system according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing a schematic system configuration of a digital watermark information embedded music information distribution system of the present invention.

  First, the digital watermark information generating means 1 inputs the digital watermark information 5 to be embedded in the music sound source, performs a process of converting the input information into a sound source, the digital watermark information normal phase sound source 61 and the digital watermark information reverse phase A sound source 62 is generated.

In the electronic watermark tone embedding means 2, enter the electronic watermark information normal phase source 61 and the electronic watermark information antiphase sound 62 generated by the electronic watermark tone generating means 1 together with stereo music source 63, electrons in the stereo music sound 63 A process of embedding the watermark information normal phase sound source 61 and the digital watermark information reverse phase sound source 62 is performed to generate a digital watermark information embedded music sound source 64. At this time, when the digital watermark information normal phase sound source 61 is embedded in the right sound source of the stereo music sound source 63, the digital watermark information reverse phase sound source 62 is embedded in the left sound source, and the digital watermark information reverse phase sound source is embedded in the right sound source of the stereo music sound source 63. When 62 is embedded, the digital watermark information positive phase sound source 61 is embedded in the left sound source.

  The digital watermark information embedded music sound source 64 in which the digital watermark information normal phase sound source 61 and the digital watermark information reverse phase sound source 62 are embedded is output as sound independently from the right sound source 41 and the left sound source 42 by the stereo sound source output means 4. . This output simply outputs sound independently from left and right. That is, the stereo sound source output means 4 can output existing stereo sound such as normal audio stereo, TV capable of stereo sound output, and radio capable of stereo sound output without developing dedicated hardware. It can be realized with equipment.

  Since the right sound source 41 and the left sound source 42 output from the stereo sound source output means 4 are respectively embedded with a digital watermark information normal phase sound source 61 and a digital watermark information antiphase sound source 62, when each sound source is viewed as it is, The digital watermark information sound source sounds like noise. However, if the right sound source 41 and the left sound source 42 to be output are viewed at the same time so as to have the same intensity, the digital watermark information sound source included in each sound source is in a phase opposite to the normal phase. The phase effect makes it almost inaudible.

  The digital watermark information decoding unit 3 does not collect the right sound source 41 and the left sound source 42 output from the stereo sound source output unit 4 with the same intensity, but collects sound so that one of the left and right sound sources becomes stronger. Do it. This

Since the effect of canceling the digital watermark information sound source due to the phase effect of the stereo sound source is reduced, it becomes easier to recognize the digital watermark information normal phase sound source 61 or the digital watermark information reverse phase sound source 62 from the right sound source 41 or the left sound source 42.

  In the digital watermark information decoding means 3, first, as shown in FIG. 2, the digital watermark information normal phase sound source 61 or the digital watermark information reverse phase sound source 62 is identified and cut out from the right sound source 41 or the left sound source 42 collected by the sound source input means 31. Processing is performed by the digital watermark information identification means 33. If this process knows what frequency, sound length, tone, etc., the digital watermark information is expressed in, it can be easily extracted by pattern matching of the sound source spectrum shown in Fig. 3.

  At this time, as described above, it is necessary to hold information on what frequency, sound length, tone, etc., the digital watermark information is expressed in the digital watermark information decoding means 3. What is necessary is just to hold | maintain in the electronic watermark information decoding means 3 as the sound source database 34. FIG. This information can be realized with a data capacity of less than 100 Kbytes at most, and the possibility of having this information on the hardware design of the digital watermark information decoding means 3 is based on the current semiconductor technology. It can be said that it is extremely thin.

  The extracted digital watermark information 36 extracted by the digital watermark information identification means 33 is displayed as digital watermark information 37 by the digital watermark information display means 36, and the artist name of the music sound source currently being heard by the user or viewer, You can get various information about music sources such as music titles and publishing record companies.

  Here, a specific example of hardware constituting the digital watermark information decoding means 3 is shown. First, an outline of a method for realizing the digital watermark information decoding means 3 using an existing mobile phone will be described. In the case of a mobile phone, since a microphone is already installed, it can be used as a sound source input means 31 instead. The digital watermark information identification means 33 requires an arithmetic device and a storage device for the pattern matching of the spectrum of the sound source shown in FIG. 3, which has an Internet connection function in the case of a normal mobile phone, An arithmetic unit and a storage device for this processing can be used instead. The digital watermark information sound source database 34 only needs to have a storage device of 100 Kbytes or less, and considering current semiconductor technology, there is no technical problem to embed it in an existing LSI chip for mobile phones. The digital watermark information display means 36 can use a display on a mobile phone.

  As mentioned above, it is technically easy to realize the digital watermark information decoding means 3 by a mobile phone. If the digital watermark information decoding means 3 is realized by a mobile phone, and the artist name, song name, publication record company, etc. are inserted as digital watermark information into the music played on TV, radio, cable, concert, etc. When the viewer wants to know information about the sound source such as the name of the artist, the name of the music, and the publishing record company, the mobile phone is brought close to either the left or right sound of the music output from the stereo sound source output means 4. Will display information such as the artist name, song name, and publishing record company of the music.

  An outline of the method for realizing the digital watermark information decoding means 3 on a television is described. In the case of a television, since the audio data is reproduced in the television, the sound source input means 31 is not necessary because the sound spectrum before the reproduction already exists without being collected. The digital watermark information identification means 33 requires an arithmetic device and a storage device for the pattern matching of the sound source spectrum shown in FIG. 3, but can be used in place of the arithmetic device and the storage device used for remote control or the like. is there. The digital watermark information sound source database 34 only needs to have a storage device of 100 Kbytes or less, and considering current semiconductor technology, there is no technical problem to embed it in an existing LSI chip. The digital watermark information display means 36 can be easily displayed on the TV screen by modifying the superimpose function for displaying channels on the TV screen.

  As described above, when the digital watermark information embedded music information distribution system according to the present invention is used, the music played on TV, radio, cable, concert, etc., which is often in a situation where users and viewers are listening. However, it is easy to provide information such as artist name, song name, and publishing record company.

  By applying this technology, it is possible to embed information for sales promotion in digital watermark information, so it can be used for music sales promotion and marketing activities.

  In addition, although it has been described here that the digital watermark information of the normal phase and the reverse phase is embedded in the sound source such as music for the left and right sound sources, the multi-channel music such as 5.1 channel is described. However, it is also possible to apply digital watermarking sound source to more than two outputs with phase relationship.

  It is the figure which showed the structure of the schematic system of the digital watermark information embedding type music information delivery system of this invention.   It is the figure which showed the detailed structure of the digital watermark sound source decoding means of the digital watermark information embedding type music information distribution system of this invention.   It is the figure which showed an example of the sound spectrum of a sound source.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Digital watermark sound source production | generation means 2 Digital watermark sound source embedding means 3 Digital watermark sound source decoding means 31 Sound source input means 32 Input sound source 33 Digital watermark information identification means 34 Digital watermark information sound source database 35 Extracted digital watermark information 36 Digital watermark information display means 37 Digital watermark information 4 Tereo sound source output means 41 Right sound source 42 Left sound source 5 Digital watermark information 61 Digital watermark information normal phase sound source 62 Digital watermark information reverse phase sound source 63 Stereo music sound source 64 Digital watermark information embedded music sound source

Claims (1)

Digital watermark sound source generating means for converting digital watermark information into a sound source, generating a first digital watermark information sound source, and generating a second digital watermark information sound source having a phase opposite to that of the first digital watermark information sound source; ,
Digital watermark sound source embedding means for embedding the first digital watermark information sound source in one of a pair of left and right sound sources, and embedding the second digital watermark information sound source in the other,
Sound source output means for outputting the pair of left and right sound sources;
Digital watermark sound source decoding means for collecting sound so that one of the pair of left and right sound sources is strong and extracting the first digital watermark information sound source or the second digital watermark information sound source from the collected sound sources When,
Digital watermark information display means for displaying the extracted first digital watermark information sound source or the second digital watermark information sound source;
An electronic watermark information embedded music information distribution system comprising: