JPH10340309A - Recording method and reproducing method for audible band signal information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the practical recording of audible band signal information with the high degree of freedom and full of simplicity and portability at a low cost by working the audible band signal information quantized to plural bit strings as continuous one- or two-dimensional image information and recording it in a record medium by an existing printing means. SOLUTION: The audible band signal information 1 of a conversion origin is converted to analog electric signal information in the input device part 2 of an audible band signal information recorder 20, converted to digital electric signal information in an A/D converter part 3 and passed to the image conversion algorithm part 4b of a signal converter part 4. The bit data strings of '0' and '1' of the audible band signal information quantized to the plural bit strings are re-read as the pixel data of 'black' and 'white', handled as a series of image information and reconstituted to the continuous one-dimensional image information or two-dimensional image information folded back at an optional fixed length matched with the size of a printing and recording medium 5. The image information provided with the audible band signal information is recorded in the printing and recording medium 5 by using a printer part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording and reproducing audible band signal information.

[0002]

2. Description of the Related Art Conventionally, for recording audible band signal information, a mechanical recording system represented by a record and a magnetic recording system such as a tape recorder have been used as analog recording means, and a magnetic recording system has been used as a digital recording means. Generally known are a magnetic recording method represented by a disk, a laser light recording method represented by a compact disk, and a solid-state recording method of storing data in a semiconductor memory. Also, a number of methods for reproducing audible band signal information have been put into practical use in association with each recording method.

[0003]

However, since the conventional recording method requires a completely standardized medium as the recording medium, not only the degree of freedom in the workability of the recording medium is low, but also the production thereof is highly industrialized. Equipment was required. Also, regarding the portability of the recording medium, the mechanical strength of the recording medium itself and its resistance to external damage such as contamination, magnetism, and static electricity are low, so a special support structure such as a case for reinforcing the recording medium is required separately. There is a problem that it is not easy and hinders cost reduction.

The present invention solves such a conventional problem,
It is an object of the present invention to provide a recording method and a reproducing method of audible band signal information which has a high degree of freedom, is simple and portable, and can be practically used at low cost.

[0005]

According to the present invention, there is provided a method for recording audible band signal information according to the present invention.
It is processed as one-dimensional or two-dimensional image information and recorded on a recording medium by existing printing means.

Further, according to the method of reproducing audible band signal information according to the present invention, audible band signal information processed as continuous one-dimensional or two-dimensional image information and quantized into a plurality of bit strings recorded on a recording medium by existing printing means is provided. The band signal information is read in a time series as it is as one-dimensional image data, and is reconstructed into a plurality of continuous bit strings, thereby restoring the original audible band signal information.

According to the recording method of audible band signal information according to the present invention, since a large number of versatile print recording media can be used as existing printing means and recording media, the degree of freedom is very high, Various printing means can be selected, and a printing recording medium can be selected and processed, and the production of the recording medium itself can be handled by relatively simple equipment. Also, regarding the portability of the recorded medium, there is no problem at all with respect to external damage such as magnetism and static electricity, and it is possible to select a material having high mechanical strength and resistance to contamination. A dedicated supporting structure such as a case is not required, and the recording medium can be supplied simply, lightly, thinly, and shortly, at low cost, and can be expected to be applied to a wide range of uses.

Further, the present invention can be implemented by combining existing error correction means, encryption means, information compression means and the like at the time of recording, or by using various printing materials as recording materials on the recording medium according to the purpose. It is possible to obtain a very distinctive recorded material utilizing the recording method.

Further, according to the method for reproducing audible band signal information according to the present invention, it is possible to reproduce the original audible band signal information from the recorded material having the above characteristics by using the conventional reading means.

Therefore, by using these methods,
This makes it possible to record and reproduce audible band signal information reversibly at low cost.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention processes audible band signal information quantized into a plurality of bit strings as continuous one-dimensional or two-dimensional image information, and uses existing printing means. This is a recording method for recording on a recording medium.Because a large number of versatile print recording media can be used as existing printing means and recording media, the degree of freedom is extremely high, and various printing means can be selected according to the purpose. The printing recording medium can be selected and processed, and the production of the printing recording medium itself can be handled with relatively simple equipment. In terms of portability, there is no problem with external damage such as magnetism or static electricity, and materials with high mechanical strength and resistance to contamination can be selected. Since no support structure is required, it is simple, light, thin, short and small, and it is possible to supply recording media at low cost.
It can be expected to be used in a wide range of applications, and has the effect of recording audible band signal information with a high degree of freedom according to the purpose.

According to a second aspect of the present invention, a new bit sequence created by using error correction means is added to a bit data sequence of audible band signal information quantized into a plurality of bit sequences, and error correction information is added. A recording method of recording a reconstructed bit data string including the bit data string on a recording medium by an existing printing means by the method according to claim 1, wherein image information which can be generated during recording to reproduction is recorded. For data errors, it is possible to take error recovery means according to the error correction means used at the time of recording, so that there is an effect that the quality of reproduced data at the time of audible band signal information restoration can be improved.

According to a third aspect of the present invention, the amount of information to be recorded is compressed compactly by the existing information compression means, and then the audible band signal information is converted by the method described in the first aspect. This is a recording method to be performed, and has an effect that more audible band signal information can be recorded on a limited print recording medium.

According to a fourth aspect of the present invention, a bit data string of audible band signal information quantized into a plurality of bit strings is reconstructed into a bit data string scrambled by an encryption means. A recording method for recording on a recording medium by an existing printing means according to the method described in Item 1,
When reproducing image information that is recorded audible band signal information, the audible band signal information to be recorded has confidentiality because it does not return to the original signal state unless means for decoding in a correct decoding procedure is taken. It has the effect of being able to.

According to a fifth aspect of the present invention, there is provided an invisible print as a recording means when recording on an existing print recording medium after converting the audible band signal information by the method according to the first aspect. Means that the image information on the print recording medium on which the audible band signal information is recorded has an invisible attribute, so that it is possible to eliminate traces of information recording from the print recording medium, and to record the audible band signal information. Has the effect of providing confidentiality.

According to a sixth aspect of the present invention, when the audible band signal information is converted by the method described in the first aspect and then recorded on an existing print recording medium, it is invisible on a recording surface. This is a recording method that uses a printing recording medium on which another printing is performed with a printing material that does not interfere with the invisible printing material, and uses an invisible printing means as a recording means in a form of being superimposed on the recording surface. Since the recorded image information on the print recording medium has an invisible attribute, it is possible to selectively eliminate the recording trace of only the audible band signal information from the print recording medium, and instead to make another preprinted image information stand out. In addition to providing confidentiality to the audible band signal information to be recorded, the audible band signal information and image information required can be recorded in the same place.

According to a seventh aspect of the present invention, after the audible band signal information is converted by the method described in the first aspect, another information is recorded on a recording surface when recording on an existing print recording medium. This is a recording method using a printing recording medium on which printing has been performed, and using a printing material that is a complementary color of the printing material as a recording means in a form of being superimposed on the recording surface, on a printing recording medium on which audible band signal information is recorded. The image information is complementary to another print information recorded on the print recording medium, so that an image with a high contrast can be obtained.Therefore, a filter that selectively passes only the image information in which the audible band signal information is recorded and its complementary color are used. By using a light source or the like, it is possible to selectively read only the audible band signal information from the print recording medium, and to raise another image information that has been printed in advance, and to obtain the necessary audible band signal information. And an image information having the effect that can be recorded in the same place.

According to an eighth aspect of the present invention, there is provided a method according to any one of the first to second aspects, wherein a continuous one-dimensional or two-dimensional image recorded on a print recording medium by an existing printing means is provided. The audible band signal information, which has been processed as two-dimensional image information and quantized into a plurality of bit strings recorded on a recording medium by existing printing means, is read as it is as one-dimensional image data in a time-series manner and reconstructed. Of the audible band signal, and has an effect that recording and reproduction of the audible band signal information can be performed reversibly.

An embodiment of the present invention will be described below with reference to FIGS. (Embodiment 1) FIG. 1 is a block diagram of hardware and a signal conversion algorithm showing a configuration of a recording apparatus using a recording method of audible band signal information according to a first embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes an audible band signal information to be recorded as a conversion source, 2 denotes an input device for converting the audible band signal information 1 into analog electric signal information, and 3 denotes an analog electric signal information by a digital electric signal. A / D to convert to information
The conversion unit 4 is a signal conversion unit composed of an image conversion algorithm unit 4b for converting the processed digital electric signal into image information. The printing record 5 is a recording destination of the digital electric signal converted into image information. A medium 6 is a printing unit for actually printing the image information on the print recording medium 5, and a printed recording medium 7 on which the image information is actually printed by the printing unit 6.

The audible band signal information recording device 20 comprises an input device 2, an A / D converter 3, a signal converter 4, and a printer 6.

The operation of this embodiment will be described below with reference to FIG. The audible band signal information 1 (eg, audio signal information) to be recorded as a conversion source is converted into analog electric signal information by an input device unit 2 (eg, a microphone and an amplifier circuit system) of the audible band signal information recording device 20. The signal is further converted into digital electric signal information by the A / D converter unit 3. Next, the digital electric signal information is transmitted to the signal conversion unit 4 (for example, a microprocessor or D
The data is passed through an image conversion algorithm unit 4b provided inside a data conversion device using an SP or the like.

Here, the bit data strings of "0" and "1" of the audible band signal information quantized into a plurality of bit strings are as follows:
The image data is treated as a series of image information by replacing the pixel data with “black” and “white” or conversely “white” and “black” pixel data. 2 folded by dimension or any fixed length
It is reconstructed into two-dimensional image information. The image information having the audible band signal information 1 thus created is recorded on the print recording medium 5 (for example, paper) by the existing printing means using the printing unit 6 (for example, a printer). A recorded print recording medium 7 is obtained.

According to this method, existing printing means and a large number of versatile printing recording media can be used as means for recording audible band signal information, so that the degree of freedom is extremely high.
Selection of various printing means and selection and processing of a print recording medium can be performed according to the purpose, and the production thereof can be handled with relatively simple equipment. Regarding portability, magnetic
There is no problem with external damage such as static electricity, and a material with high mechanical strength and resistance to contamination can be selected.Therefore, there is no need for a special support structure such as a case for reinforcement, and it is simple and convenient. It is light, thin, short and small, and can supply recording media at low cost, so it can be expected to be applied to a wide range of applications, and has the effect of recording audible band signal information with a high degree of freedom according to the purpose. Have.

Next, the operation will be described with reference to a more specific example from the viewpoint of practicality. In the above-mentioned operation example, a case is considered in which audio signal information is recorded on the back side of a postcard in a thermal mode with a quality comparable to that of a telephone line. Postcard size is 100mm * 14
8 mm, the recording density in the main scanning direction of the thermal recording is 8 dots /
mm, the recording density in the multiple scanning direction is 7.7 lines / mm,
When the sampling frequency of the A / D conversion is 4 kHz and the conversion bit length is 8 bits, the maximum recording time when the entire back surface of the postcard is recorded without any gap is 28.49 seconds. In practice, the recording time is reduced to about 80 to 90% because the area around the postcard cannot be used completely, but sufficient time can be secured for simple messages. It can be put to practical use.

Further, even with this configuration, it is possible to extend the recording time if the recording quality of audio is slightly sacrificed.

In the first embodiment, the thermal recording is used as an example of the printing means. However, in order to increase the recording density, an apparatus such as a laser printer having a higher printing density may be used.

However, when the printing density increases, the probability of occurrence of a reading error due to a reading angle shift at the time of reading increases. In this case, data for angle correction processing at the time of reading (for example, A start line or a dummy line in the middle of the image).

Although the thermal recording paper is assumed as the print recording medium, plain paper can be used if the printing method is changed.

Further, in the first embodiment, image information is handled in terms of "black" and "white" for convenience, but "black" and "white" are not necessarily used as long as the combination provides sufficient contrast.
Need not be.

Similarly, in the first embodiment, the image information is treated as simple binary information. However, the image information is not necessarily required to be simple binary as long as the contrast can be sufficiently obtained. Further, the recording density can be improved.

Further, in the configuration of the first embodiment, an analog signal as an actual sound such as a voice is taken as an example, but the original audible band signal information is digital electric signal information from the beginning (for example, MIDI signal, etc.) can be recorded in the same manner, and higher quality audible band signal information can be recorded on the print recording medium in a longer recording time. Specifically, the first embodiment
Since the maximum number of data that can be recorded is 111 kilobytes, it is possible to sufficiently record a whole tune of about 3 to 4 minutes for MIDI signal information.

(Embodiment 2) FIG. 2 is a block diagram of hardware and a signal conversion algorithm showing a configuration of a recording apparatus using a recording method of audible band signal information according to a second embodiment of the present invention.

In FIG. 2, reference numeral 1 denotes an audible band signal information to be recorded as a conversion source, 2 denotes an input device for converting the audible band signal information 1 into analog electric signal information, and 3 denotes an analog electric signal information by a digital electric signal. A / D to convert to information
The conversion device unit 4 includes a pre-processing data conversion algorithm unit 4a that internally processes digital electric signal information according to the purpose, and an image conversion algorithm unit 4b that converts the processed digital electric signal into image information. A signal conversion device unit, 5 is a print recording medium on which a digital electric signal converted into image information is recorded, and 6 is a print recording medium.
A printing device section 7 for actually printing the image information is a recorded print recording medium after the printing apparatus section 6 has actually printed the image information. The audible band signal information recording device 20 includes an input device 2, an A / D converter 3, a signal converter 4, and a printer 6, as in the first embodiment.

The operation of this embodiment will be described below with reference to FIG. In the same manner as in the first embodiment, audible band signal information 1 to be recorded as a conversion source is converted into digital electric signal information via an input device 2 and an A / D converter 3. Next, the digital electric signal information is preprocessed according to its purpose through a preprocessing data conversion algorithm section 4a provided inside the signal conversion device section 4 and then passed to an image conversion algorithm section 4b. On this occasion,
In the second embodiment, the preprocessing data conversion algorithm unit 4
At a, additional information for error correction by existing error correction means (for example, ECC) is added to the original digital electric signal information. Thereafter, the audible band signal information converted into image information by the image conversion algorithm unit 4b is recorded as image information on the print recording medium 5 by the existing printing unit using the printing device unit 6 as in the first embodiment. To obtain a print recording medium 7 on which audible band signal information is recorded.

According to this method, it is possible to take an error recovery means corresponding to the error correction means used at the time of recording for a data error of the image information which may occur during the period from the time of recording to the time of reproduction. Has the effect of improving the reliability of the audible band signal information, improving the quality of reproduced data when restoring audible band signal information, and obtaining error-free recording.

In the second embodiment, the error correction means is used. However, if the data quality at the time of reproduction is slightly sacrificed, an error detection means for simpler data communication (for example, parity, CRC, Sync code). Frame division etc.)
Can be used, and both the recording time and the apparatus cost can be improved.

The second embodiment is an example of an error correction process, and does not specify how to use the error correction means.

(Embodiment 3) The configuration of a recording apparatus using a method for recording audible band signal information according to a third embodiment of the present invention is shown in FIG. Is exactly the same as the second embodiment except that

The operation of the third embodiment will be described below with reference to FIG. Similarly to the second embodiment, the audible band signal information 1 to be recorded as a conversion source is converted into digital electric signal information via the input device 2 and the A / D converter 3. Next, the digital electric signal information is preprocessed according to its purpose through a preprocessing data conversion algorithm section 4a provided inside the signal conversion device section 4 and then passed to an image conversion algorithm section 4b. At this time, in the third embodiment, the pre-processing data conversion algorithm unit 4a converts the original digital electric signal information into compactly compressed data information by the existing information compression means (for example, a file compression algorithm).
Thereafter, the audible band signal information converted into image information by the image conversion algorithm unit 4b is recorded as image information on the print recording medium 5 by the existing printing means using the printing device unit 6 as in the second embodiment. To obtain a print recording medium 7 on which audible band signal information is recorded.

This method has an effect that more audible band signal information can be recorded on a limited print recording medium. In particular, since the bit string of the quantized audible band signal information has relatively continuity, a high compression ratio can be obtained even by using a simple information compression means.
Information recording with a high recording density can be performed.

Further, in the third embodiment, an example in which information compression means such as file compression is implemented in the pre-processing data conversion algorithm unit 4a has been described. However, as shown in FIG. The post-processing data conversion algorithm unit 4c further applies an existing reversible image information compression means (for example, MH, MR, etc.) to the bit string of the audible band signal information after being converted into the information, so that a higher compression ratio is obtained. Therefore, information recording with higher recording density can be performed.

In the third embodiment, the pre-processing data conversion algorithm section 4a applies information compression means such as file compression, and then converts the information into image information by the image conversion algorithm section 4b. Although an example in which the existing reversible image information compressing means is applied by the unit 4c has been described, if a higher compression ratio can be obtained, this order may be changed (for example, the image conversion algorithm unit 4).
After the conversion into image information by b, the pre-processing data conversion algorithm unit 4a may perform an existing reversible image information compression unit, and then the post-processing data conversion algorithm unit 4c may perform information compression such as file compression. ).

The third embodiment is an example of the information compression processing, and does not specify how to use the information compression means.

(Embodiment 4) The configuration of a recording apparatus using a method for recording audible band signal information according to a fourth embodiment of the present invention is shown in FIG. Is exactly the same as the second embodiment except that

The operation of this embodiment will be described below with reference to FIG. Similarly to the second embodiment, the audible band signal information 1 to be recorded as a conversion source is converted into digital electric signal information via the input device 2 and the A / D converter 3. Next, this digital electric signal information is
After preprocessing according to the purpose through a preprocessing data conversion algorithm section 4a provided inside the signal conversion device section 4, the data is passed through an image conversion algorithm section 4b. At this time, in the fourth embodiment, the pre-processing data conversion algorithm unit 4a converts the original digital electric signal information or the encrypted information obtained by scramble-converting the original information into the original digital electric signal information by the existing encryption means (for example, a password protect or a decryption key). Additional information for decryption is added.
Thereafter, the audible band signal information converted into image information by the image conversion algorithm unit 4b is recorded as image information on the print recording medium 5 by the existing printing means using the printing device unit 6 as in the second embodiment. To obtain a print recording medium 7 on which audible band signal information is recorded.

According to this method, when reproducing the image information which is the recorded audible band signal information, the signal does not return to the original signal state unless a means for decoding in a correct decoding procedure is taken. It has the effect that information can be confidential. In particular, audible band signal information has a very wide range of information such as pitch, timbre, waveform, distortion, noise, etc., and its periodicity is also random. It is difficult, and it is very difficult to completely restore the original, and highly confidential information recording can be performed.

Further, if audible band signal information such as voice is used for the decryption key itself at the time of encryption, it is possible to simultaneously record on the same print recording medium, so that personal authentication using voice recognition means is also possible. And more highly confidential information recording becomes possible.

In addition, when reproducing the printed recording medium on which the actual recording has been performed, the reproduction is not performed unless the correct decryption procedure is taken. Various usage methods can be considered depending on the purpose, such as reproducing or discarding the print recording medium.

The fourth embodiment is an example of an encryption process, and does not specify how to use the encryption means. Neither does it specify a use method at the time of reproduction.

(Embodiment 5) The configuration of a recording apparatus using a recording method of audible band signal information according to a fifth embodiment of the present invention is the same as that of FIG. This is exactly the same as the second embodiment.

The operation of this embodiment will be described below with reference to FIG. Similarly to the second embodiment, the audible band signal information 1 to be recorded as a conversion source is finally converted into image information via an input device 2, an A / D converter 3 and a signal converter 4. Is converted. The audible band signal information converted into image information is stored in an invisible printing material (eg, infrared ink, ultraviolet ink, radiation ink, etc.) as a recording means.
In the same manner as in the second embodiment, a printing recording medium 7 is recorded in the printing recording medium 5 by the printing device unit 6 and has recorded audible band signal information having an invisible attribute to a recording trace.

According to this method, since the image information on the print recording medium on which the audible band signal information is recorded has an invisible attribute, it is possible to eliminate the trace of information recording from the print recording medium, and to add the audible band signal information to the recorded audible band signal information. It has the effect that confidentiality can be provided.

The reading means of the image information when reproducing the print recording medium uses a light source or a detector other than the visible light, unlike the reading means of the normal printing means. There is no response and no reading error occurs. Therefore, it is possible to improve the reliability of the recorded information,
It also has the effect of improving the quality of reproduced data when restoring audible band signal information, and of obtaining error-free recording.

The fifth embodiment is an example of an invisible printing unit, and does not specify a use method of the invisible printing unit. Neither does it specify a use method at the time of reproduction.

(Embodiment 6) The configuration of a recording apparatus using the recording method of audible band signal information in the sixth embodiment of the present invention is the same as that of FIG. This is exactly the same as the second embodiment.

The operation of this embodiment will be described below with reference to FIG. In the same manner as in the second embodiment, the audible band signal information 1 to be recorded as a conversion source is finally converted into image information via the input device 2, the A / D converter 3 and the signal converter 4. Is converted. The audible band signal information converted into the image information is printed by the printing unit 6 in the same manner as in the second embodiment using an invisible printing material as a recording unit so as not to interfere with the invisible printing material for recording the audible band signal information. On the recording surface of the print recording medium 5 on which another printing has been performed in advance, a print recording medium 7 which is recorded in a form superimposed on the print information preliminarily applied and has audible band signal information having an invisible attribute is obtained.

According to this method, the image information on the print recording medium on which the audible band signal information is recorded has an invisible attribute. Therefore, the recording trace of only the audible band signal information is selectively eliminated from the print recording medium instead of being printed in advance. It is possible to make different image information stand out, and it is possible to record not only audible band signal information to be kept confidential but also necessary audible band signal information and image information in the same place. Has an action.

By this operation, it is possible to develop the card into a wide range of applications according to the purpose, such as a postcard or greeting card capable of recording and reproducing voices, a heading display of recorded contents, a guidance display, and the like.

In the sixth embodiment, another example is described in which the print recording medium is subjected to another printing in advance. However, as long as the material does not interfere with the invisible printing material, the printing after recording the audible band signal information is performed. It is of course possible to perform another printing on the recording medium.

Similarly, as long as the invisible printing materials do not interfere with each other, recording is possible by recording audible band signal information and then recording a plurality of audible band signal information thereon. It is of course possible to improve the information amount.

The sixth embodiment is an example of the invisible printing means, and does not prescribe how to use the invisible printing means. Neither does it specify a use method at the time of reproduction.

(Embodiment 7) The configuration of a recording apparatus using the recording method of audible band signal information according to the seventh embodiment of the present invention is similar to that of FIG. Is exactly the same as the second embodiment except that

The operation of the embodiment will be described below with reference to FIG. Similarly to the second embodiment, the audible band signal information 1 to be recorded as a conversion source is finally converted into image information via an input device 2, an A / D converter 3 and a signal converter 4. Is converted. The audible band signal information converted into the image information is stored in a print recording medium 5 on which another printing has been performed in advance.
In the same manner as in the second embodiment, a print recording medium 7 which is recorded in a form superimposed on print information previously applied by the printing unit 6 using a print material which is a complementary color of the print material described above, and in which audible band signal information is recorded. Get.

According to this method, the image information on the print recording medium on which the audible band signal information is recorded has a complementary color relationship with another print information recorded on the print recording medium, and an image with high contrast is obtained. If a filter that selectively passes only image information in which signal information is recorded or a light source that is a complementary color thereof is used, only audible band signal information can be selectively read from a print recording medium, and another preprinted image can be read. This has the effect of raising the image information and recording the required audible band signal information and the required image information in the same location.

In this method, since a very general method can be used as a printing means, system cost and running cost can be suppressed, and confidentiality of information and design of a print recording medium can be reduced. In a field that does not matter, it is possible to expand to a wide range of applications as described in Embodiment 2 at very low cost.

Although the seventh embodiment has been described on the premise that each printing material has a complementary color relationship, a sufficient contrast can be obtained at the time of reading even if the printing materials do not have a perfect complementary color relationship. A similar effect can be obtained as long as the combination can read only the audible band signal information (for example, a combination of yellow and black inks).

Further, if the combination is such that a sufficient contrast can be obtained at the time of reading and only the audible band signal information can be selectively read, the printing material to be printed on the print recording medium in advance is not a single color but a plurality of hues. Since a combination (for example, a combination of yellow, light blue, and black ink) can be used, a similar effect can be achieved while realizing a more complicated expression.

In the seventh embodiment, another example is described in which the print recording medium is subjected to another printing in advance. However, as long as the printing material has a complementary color relationship or a material capable of obtaining a high contrast, the audible band signal is not changed. Of course, another printing can be performed on the print recording medium after the information is recorded.

The seventh embodiment is an example of the complementary color printing means, and does not specify how to use the complementary color printing means. Neither does it specify a use method at the time of reproduction.

(Eighth Embodiment) FIG. 4 is a block diagram of hardware and a signal conversion algorithm showing a configuration of a reproducing apparatus using a method of reproducing audible band signal information according to an eighth embodiment of the present invention.

In FIG. 4, reference numeral 7 denotes a recorded print recording medium after the audible band signal information is actually converted into image information by the audible band signal information recording device 20 and printed. A reading unit 9 for reading image information and converting it into digital electric signal information; an angle correction processing unit 9 for correcting a reading angle deviation with respect to the read image information; and 10 an inverse conversion of the signal conversion performed during recording. A signal inverse converter unit provided with a post-processing data inverse conversion algorithm unit 10c, an image inverse conversion algorithm unit 10b, and a pre-processing data inverse conversion algorithm unit 10a.
A converter unit 12 is an output unit for converting analog electric signal information into audible band signal information, and 13 is reproduced audible band signal information restored from recorded information.

The audible band signal information reproducing apparatus 30 is composed of a reading unit 8, an angle correction processing unit 9, a signal inversion unit 10, a D / A conversion unit 11, and an output unit 12.

The operation of this embodiment will be described below with reference to FIG. The audible band signal information converted into continuous one-dimensional or two-dimensional image information folded back at an arbitrary fixed length printed on the print recording medium 7 on which the audible band signal information is recorded is read by the reading unit 8 (for example, a scanner). Such)
Using the existing reading means corresponding to the printing means at the time of recording is first read in chronological order in the form of image information,
It is converted into digital electric signal information meaningd as a continuous one-dimensional binary pixel data string of “black” and “white”.

If the image information to be read is a two-dimensional image, the data read in chronological order without any problem is stored in the pixel data string before printing if there is no deviation in the reading angle in an ideal state. However, in practice, there is a possibility that an error in the reading position due to an angular deviation occurs. Therefore, the angle shift is corrected for the binary pixel data string immediately after reading by the angle correction processing unit 9, and the correct 1
By performing a correction process for obtaining a two-dimensional pixel data sequence, digital electric signal information equivalent to the pixel data sequence before printing is obtained.

Next, the digital electrical signal information is inversely converted by the signal inverse converter unit 10 (for example, a data inverse converter using a microprocessor, a DSP, or the like) in the reverse order of the data conversion performed at the time of recording. To restore the audible band signal information quantized to the original plurality of bit strings. More specifically, the previous digital electric signal information, which has been given as a pixel data string, is transmitted to the signal inversion device unit 1.
0, post-processing data reverse conversion algorithm unit 1 provided inside
After the inverse conversion of the post-processing data conversion at the time of recording is performed at 0c, the data is passed to an image inverse conversion algorithm 10b. Here, the one-dimensional “black” and “white” pixel data strings are read as “0” and “1”, or conversely, “1” and “0” bit data strings, so . Thereafter, the pre-processing data reverse conversion algorithm unit 10a again performs the reverse conversion of the pre-processing data conversion at the time of recording, thereby restoring the audible band signal information quantized into the original plurality of bit strings.

The audible band signal information quantized into a plurality of bit strings is converted into analog electric signal information by the D / A converter unit 11, and the output device converts the analog electric signal information into audible band signal information. Through the section 12 (for example, a speaker and an amplifier circuit system), the reproduced audible band signal information 13 (for example, reproduced sound or the like) restored from the recorded information is obtained.

This method has the effect that recording and reproduction of audible band signal information can be performed reversibly.

In the eighth embodiment, the image information is handled in terms of "black" and "white" for convenience. However, "black" and "white" are not necessarily used as long as the combination provides sufficient contrast.
Need not be.

Similarly, in the eighth embodiment, the image information is treated as simple binary information. However, the image information is not necessarily required to be simple binary as long as the contrast can be sufficiently obtained. In the case where the gradation is used, the reproduction quality equivalent to that in the case of the simple binary can be sufficiently obtained by using the gradation which is equal to or higher than that at the time of recording at the time of reading.

In the eighth embodiment, the deviation of the reading angle is corrected by using the angle correction processing section 9. However, although the total recording capacity is reduced, one-dimensional image information represented by a bar code, or If two-dimensional image information having a print pixel area larger than the reading angle deviation allowable amount is used, the angle correction processing is not necessarily required.

Further, in the configuration of the eighth embodiment, an analog signal as an actual sound such as a voice is taken as an example, but the original audible band signal information is digital electric signal information from the beginning (for example, MIDI signals, etc.) can be reproduced in the same manner, and higher-quality audible band signal information can be reproduced for a longer time from the recording information of one print recording medium.

The first to eighth embodiments of the present invention have been described above. However, since the embodiments of the present invention are independent from each other, each embodiment is described according to the purpose of use. Any combination can be used.

The recording / reproducing system may be one in which a recording device and a reading device are integrated. As a specific example, if the present recording / reproducing function is incorporated in an information terminal such as a facsimile, the function of the present invention can be realized simply and at low cost.

[0085]

As described above, according to the method for recording audible band signal information according to the present invention, since a large number of versatile print recording media can be used as existing printing means and recording media, the degree of freedom is very high. Highly, various printing means can be selected and a print recording medium can be selected and processed according to the purpose, and the production of the recording medium itself can be handled with relatively simple equipment. Also, regarding the portability of the recorded medium, there is no problem at all with respect to external damage such as magnetism and static electricity, and it is possible to select a material having high mechanical strength and resistance to contamination. A dedicated supporting structure such as a case is not required, and the recording medium can be supplied simply, lightly, thinly, and shortly, at low cost, and can be expected to be applied to a wide range of uses.

Furthermore, the present invention can be implemented by combining existing error correction means, encryption means, information compression means and the like at the time of recording, or by using various printing materials as recording materials for the recording medium according to the purpose. It is possible to obtain a very distinctive recorded material utilizing the recording method.

Further, according to the method of reproducing audible band signal information according to the present invention, it is possible to reproduce the original audible band signal information from the recorded material having the above characteristics by using the conventional reading means.

Therefore, by using these methods,
This makes it possible to record and reproduce audible band signal information reversibly at low cost.

[Brief description of the drawings]

FIG. 1 is a block diagram of hardware and a signal conversion algorithm showing a configuration of a recording device using a recording method of audible band signal information according to a first embodiment of the present invention.

FIG. 2 is a block diagram of hardware and a signal conversion algorithm showing a configuration of a recording apparatus using a recording method of audible band signal information according to Embodiments 2 to 7 of the present invention.

FIG. 3 is a block diagram of a hardware and a signal conversion algorithm in which a post-processing data conversion unit is added to the configuration of a recording apparatus using the audible band signal information recording method according to the third embodiment of the present invention;

FIG. 4 is a block diagram of hardware and a signal conversion algorithm showing a configuration of a reproducing apparatus using a method for reproducing audible band signal information according to an eighth embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 audible band signal information 2 input unit 3 A / D converter 4 signal converter 4 a pre-processing data conversion algorithm 4 b image conversion algorithm 4 c post-processing data conversion algorithm 5 printing recording medium 6 printing device 7 recording Printed recording medium 8 Reader unit 9 Angle correction processing unit 10 Signal reverse conversion unit 10a Preprocessing data reverse conversion algorithm unit 10b Image reverse conversion algorithm unit 10c Post-processing data reverse conversion algorithm unit 11 D / A conversion unit 12 Output Device section 13 Reproducible audio band signal information 20 Audio band signal information recording device 30 Audio band signal information reproducing device

Claims (8)

[Claims] 1. A method for recording audible band signal information in which audible band signal information quantized into a plurality of bit strings is processed as continuous one-dimensional or two-dimensional image information, and is recorded on a recording medium by existing printing means. 2. The audible band signal information recording method according to claim 1, wherein the reproduction quality at the time of decoding is improved by using error correction means. 3. The audible band signal information recording method according to claim 1, wherein the information amount of the audible band signal information to be recorded is improved by using information compression means. 4. The audible band signal information recording method according to claim 1, wherein the recording is made confidential by using an encryption means. 5. The audible band signal information recording method according to claim 1, wherein the recording is made confidential by using an invisible printing means. 6. A recording medium on which another recording is performed on a recording surface,
2. The method for recording audible band signal information according to claim 1, wherein the recording is performed using an invisible printing means. 7. A recording medium on which another printing is performed on a recording surface,
2. The method for recording audible band signal information according to claim 1, wherein the recording is performed using a printing material that is a complementary color of the printing material. 8. The audible band signal information processed as continuous one-dimensional or two-dimensional image information and quantized into a plurality of bit strings recorded on a recording medium by an existing printing means is converted into one-dimensional time series data. A method for reproducing audible band signal information in which original audible band signal information is restored by reading and reconstructing as image data.