MXPA96006067A - Apparatus and method for synthesizing information signs and reproduction control signals, and apparatus for recording information signals - Google Patents

Abstract

A synthesis signal, which is reproduced from a reproducing device and converted into an analog signal, includes an analog information signal and a copy control code. This blow control code is modulated by a broad spectrum. A code reading unit of the recording apparatus extracts a copy control code by a broad reverse spectrum. A unit of code change this code control copy by a broad spectrum, as needed. An output signal from the code change unit is converted into a digital signal. This digital signal is subjected to the necessary processes for recording and is recorded to a recording medium.

Description

APPARATUS AND METHOD TO SYNTHESIZE SIGNALS PE INFORMATION YESTERS OF CONTROL OF THE REPRODUCTION, YAPARATO FOR LAGRABACIÓN OF INFORMATION SIGNALS BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an apparatus and method for recording information signals, to a system and method for copying information signals and to a recording medium of these information signals. More particularly, the invention relates to a copy prevention system, in which a signal is not lost, even in a communication by an analog signal. Description of the Prior Art There are some methods for the prevention of copying in a digital data recording system, for example a digital VTR (video tape recorder). One of them is a method to inhibit copying by adding a copy control signal to the digital data. First, a copy prevention system will be described. Figure 1 is a diagram showing the principle of the copy prevention system. In Figure 1, the reference number 100 denotes a reproductive apparatus; 101 is a recording medium for reproduction; 102 is a reproductive unit; 110 is a recording apparatus; 111 is a recording unit; 112 is a unit that detects the copy control signal; 113 is a recording medium for recording; 121 is a read signal from the recording medium 101; 122 is a reproduction signal, which is supplied from the reproducing apparatus 100 to the recording apparatus; 123 is a copy control signal; and 124 is a write signal to the recording medium 113. In the reproducing apparatus 100, constructed by the recording medium 101, for playback and the playback unit 102, according to Figure 1, a recording signal is extracted from the recording medium. 101 by the reproduction unit 102 and is produced as a reproduction signal 122, digital or analog. On the other hand, in the recording apparatus 110, built by the recording unit 111, the detection unit 112 of the copying control signal, and the recording medium 113 for recording, this detection unit 112 of the copying control signals detect the copying control signal 123. According to the result of the detection, the recording unit 111 generates the writing signal 124, which inhibits or allows recording to the recording medium 113. The recording apparatus, for recording a signal to the recording medium 101, which is reproduced by the reproductive apparatus 100, will now be described. Figure 2 is a block diagram of the recording apparatus by a digital signal. In Figure 2, the reference number 200 denotes an analog unit; 201 a source of information from which the information to be recorded is generated; and 210 is a digital unit. This digital unit 210 comprises: a coding unit 211, a code generator 212 for the prevention of copying, a synthesizer 213, a writing unit 214 and a recording medium 215. An analog signal 231 of information is converted into a digital signal 232 of information by an ADC (analog / digital converter) 221 and is supplied to the digital unit 210. In the digital unit 210, the coding unit 211 encodes the digital information signal and supplies a key 233 of information to the synthesizer 213. The synthesizer 213 synthesizes the information code 233 and a copy prevention code 234 from the generator 212 of the copy prevention code. An output signal 235 is supplied from the synthesizer 213 to the writing unit 214 and an output signal 236 of the writing unit 214 is recorded in the recording medium 215. The information code 233 and the copy prevention code 234 they are recorded in the recording medium 215. The system of Figure 2 can be applied to, for example, a master unit of a read-only disc medium. Figure 3 shows another example of a recording device for digital recording. According to the example of Figure 3, the copy prevention code is added in the coding unit 211. The information code 233 from the coding unit 211 is supplied to a code reading unit 216 and an aggregate copy prevention code 237 is separated. The copy prevention code is supplied to a control unit 217 of the copy prevention code. This control unit 217 limits one generation of copying. For example, when the copy prevention code is a code to allow a copy of a generation, the control unit 217 generates a control signal 238 for rewriting the copy prevention code to a code to inhibit copying, and a control signal 239 for instructing the permission or inhibition of the recording of a signal to the recording medium 215, by the rewriting unit 214. When the original copy prevention code allows the copying of a generation, the control signal 238 is supplied to a code change unit 218, the copy prevention code is changed to a code having the contents of copy inhibition , and writing by the control signal 239 is allowed. The system of Figure 3 can be applied, for example, to a digital VTR. In a copying system that uses a digital medium, the operation in the case of a digital connection and the operation in the case of an analog connection are different. Examples of those cases will now be described, respectively. First, the digital connection will be described. Figure 4 is a schematic diagram of a copying system by digital connection. Reference number 301 denotes a digital data reproduction apparatus; 302 is a digital data recording apparatus; and 311 is a digital signal. As for the operation of Figure 4, the digital signal 311 is supplied from the digital data reproducing apparatus 301 to the digital data recording apparatus 302 and the recording operation of this digital data recording apparatus 302 is controlled by the control signal of copying, included in the digital signal 311. Figure 5 shows an example of the copying system by the digital connection. In Figure 5, the reference number 400 denotes a reproductive apparatus; 401 is a recording medium on the playback side; 402 is a reading unit; 410 is a digital interface; 411 is a communication path; 420 is a recording device; 424 is a reading unit of the copy prevention code; 425 is a control unit of the copy control signal; 426 is a code change unit; 421 is a writing unit, 423 is a recording medium of the recording side; 431 is a read signal; 432 is a digital reproduction signal; 435 is a copy prevention code that is read, 436 and 437 are control signals; and 438 is a writing signal.

The operation of the construction of Figure 5 will now be described. In the reproducing apparatus 400, which comprises the recording medium 401 for reproduction and the reading unit 402, the read signal 431, obtained from the recording medium 401, is supplied to the reading unit 402 and is produced as a signal digital reproduction 432. ' This digital reproduction signal 432 passes through the communication path 411 of the digital interface 410 and is supplied to the code reading unit 424 and the copy prevention code 435 is separated. The control unit 425 of the copy control signal decodes the separate copy prevention code 433 and reads the information. The control signal 436 for changing the copy prevention code is produced to the code change unit 426 and the control signal 437, to instruct the permission or inhibition of the recording of the signal to the recording medium 425 is produced to the writing unit 421. In the construction of the Figure 5, not only the permission and inhibition of the recording, but also the limitation of the copying about the generation can be carried out. The system for copying the analog connection will now be described. Figure 6 shows a schematic construction. The reference number 501 denotes a digital data player; 502 is a digital data recording apparatus; and 511 is an analog signal transmitted between the apparatuses 501 and 502. In the construction of Figure 6, the analog signal 511, which was converted from D / A and produced from the digital data player 501, is input to the apparatus Recording 502 of digital data and it is converted from A / D and digitally recorded. In such a system, when the copy control signal has been extinguished in the analog signal 511, the copy prevention control in the digital data recording apparatus 502 can not be executed. A few methods have been proposed as the method to prevent copying by an analog interface. For example, when the analog signal is a video signal, a phase of a burst of color pulses of an analog video signal to be produced is partially inverted or a pseudo-synchronization signal, which has a extremely large level, it is inserted as a synchronization signal for AGC, so even if normal playback can be executed. When the video signal is recorded by the VTR, a normal playback image will not be obtained in a monitor receiver. In a conventional copying system, the digital copying prevention code is added to a signal, in which a source of information was digitally encoded. In the case of a digital interface, therefore, the digital recording apparatus detects the copy control signal and can execute the copy prevention control. Even if the digital data player is used, however, in the case of an analog interface, the digital signal, such as a copy control signal, added by the D / A conversion is lost. The copying control signal can not be consistently detected in the digital recording apparatus, in which the signal is finally recorded. The control of copy prevention can not be carried out. Thus, it is necessary to prevent copying by using the difference between the AGC methods of the VTR and the monitor receiver or the difference between the characteristics of the APC methods. As mentioned before, when copy prevention is executed using the difference between the AGC methods of the VTR and the monitor receiver or the difference between the characteristics of the APC, there is the fear that problems will occur, such that it can not be prevented copying, a reproduction image of the monitor receiver is altered by a countermeasure for the prevention of copying, or the like. OBJECTS AND COMPENDIUM OF THE INVENTION Therefore, it is an object of the invention to provide an apparatus and method of recording information signals., a system and method of copying information signals and a means of recording these information signals, which can reliably prevent copying in the case of an analog interface and which hardly produce an influence, such as deterioration or the like , in an original signal in that case. According to an aspect of the invention, an information signal synthesizer apparatus and method is provided, characterized in that a source of information generates a main information signal, a sub-information source generates a sub-information signal, a unit Broad spectrum performs a broad-spectrum process to the sub-information signal, and a synthesizer synthesizes the processed broad-spectrum sub-information signal, which is supplied from the broad-spectrum unit and the main information signal from the source of information, thus generating a synthesis information signal. According to another aspect of the invention, an information signal synthesizer apparatus and method is provided, characterized in that an information reading unit reproduces a sub-information signal from a synthesis signal of a main information signal and a signal of broad spectrum processed sub-information, executing a broad-spectrum process inverse to the processed broad-spectrum sub-information signal and generating the main information signal, a sub-information signal control unit forms a signal of change information, changing the sub-information signal that is supplied from the information reading unit, and a synthesizer forms a synthesis signal of the changed sub-information signal, which was processed in a broad spectrum and the main information signal from the changed sub-information signal and the main information signal from the information reading unit mation According to the invention, an information signal recording apparatus is also provided, characterized in that an information reading unit reproduces a copying control signal by executing a broad spectrum inverse process to the processed broad spectrum copying control signal. , from an analog synthesis signal of a main information signal and the copying control signal processed by the broad spectrum, an analog / digital converter converts the synthesis signal to a digital signal, the permission and inhibition of the recording of the Digital signal produced to a recording medium by a recorder are controlled according to the copy control signal. In the invention, since an additional information band, such as a copy control signal or the like, is widened by the broad spectrum process and the additional information is added to the signal band of the information source, the signal Copy control can not be removed by a filter or similar. Since the processed signal of broad spectrum is added, an influence by a deterioration or similar is hardly exerted in the original data. In addition, while synchronization is not obtained in a period of time when the broad spectrum is executed, it is difficult to perform not only the detection of the addition of the signal, but also the detection of the copy control signal. In addition, different codes can be used as a PN code that is used for the broad spectrum and several kinds of orthogonal codes can also be multiplied. According to the invention, therefore, since the copying control signal is not cleared, even after the digital signal was converted D / A, copying is prevented for the digital data recording apparatus, which is connected in an analog way. Since the copy control signal is not yet erased in the signal recorded in the analog recording apparatus, and the copy control signal can not be eliminated by a filter or the like, a very high copy prevention effect can be obtained . further, there is the advantage that by multiplying the broad spectrum class and the orthogonal functions, a quantity of the information that can be added can be freely controlled. The above objects and features and others of the present invention will become apparent from the following detailed description and the appended claims, with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing a principle of a copy prevention system; Figure 2 is a block diagram of an example of a recording apparatus, according to a digital signal of a copying control code; Figure 3 is a block diagram of another example of a recording apparatus by a digital signal of a copy control code; Figure 4 is a block diagram, schematically showing a copying system by a digital connection; Figure 5 is a block diagram of an example of the copying system by the digital connection; Figure 6 is a block diagram, schematically showing a copying system by an analog connection; Figure 7 is a block diagram of an embodiment of a recording apparatus by an analog signal of a copying control code, according to the invention; Figure 8 is a block diagram of another embodiment of a recording apparatus by an analog signal of a copying control code, according to the invention; Figure 9 is a block diagram of one embodiment of a copying system, according to the invention; Figure 10 is a block diagram of another embodiment of a copying system, according to the invention; Figure 11 is a block diagram showing a construction of an example of a code reading unit in another embodiment of the copying system according to the invention; and Figure 12 is a block diagram showing a construction of an example of a code change unit in another embodiment of the copying system, according to the invention. DETAILED DESCRIPTION OF THE PREFERRED MODALITIES An embodiment of the invention will be described below with reference to the drawings. Figure 7 is a diagram showing a construction of an embodiment of a recording apparatus according to the invention. In Figure 7, an analog unit 800 has an information source 801 for generating an information signal to be recorded and a synthesizer 802 for synthesizing an information signal 831 and a copying control code 833. A synthesis signal 834, from the synthesizer 802, is converted into a digital signal by an ADC (analog / digital converter) 821. The digital signal is supplied to a digital unit 810. A drive 811 generates the copy control code, generates a copying control code 832, to control the prevention of copying. The copy control code 832 is supplied to a broad spectrum unit 812 and processed in this broad spectrum. The copying control code 833 processed by the broad spectrum is supplied to the synthesizer 802. A synthesis signal 835, which is converted to the digital signal, is supplied to a coding unit 813. This coding unit 813 encodes the digital information and its output 836 is supplied to a writing unit 814. A write signal 837 from the writing unit 814 is recorded in a recording medium 815. By the construction of Figure 8, the copying control code of the same band Like that of the analog signal of the information source, it can be added. Figure 8 shows another embodiment of a recording apparatus according to the invention. As shown in Figure 8, the analog unit 800 includes: a code reading unit 816, for extracting the copying control code processed in the wide spectrum, multichannel to the analog signal 831 from the information source 801; and a code change unit, to change the copying control code. This code change unit 818 generates the synthesis signal 834 in which the copying control code that was processed in the broad spectrum is multiplexed to the analog information signal. The synthesis signal 834 is converted into the digital signal 835 by the ADC (analog / digital converter) 821. The digital signal 835 is supplied to the coding unit 813 of the digital unit 810. An output signal of the ADC 821 is recorded in the recording medium 815 by the digital unit 810, in a similar way to the previous modality. As specific examples of the information to be recorded, audio information and / or video information are mentioned. The recording means 815 is a medium in the form of a tape or disk, in which a digital signal can be recorded in optical or magnetic form. A copy control code 838, extracted by the code reading unit 816, is supplied to a control unit 817 of the copy control signal. The control unit 817 decodes the original copy control code and generates a copy control code 839 to be recorded again. The copy control code 839 is supplied to the code change unit 818 and the copy control code in the synthesis signal 834 is changed. For example, when the original copy control code denotes that copying is allowed or inhibited, the new copy control code is also made identical to the original copy control code.

When the original copy control code denotes that the copying of a generation is allowed, the new copy control code is changed to a code indicative of copy inhibition. When an original copy control signal 840, which is supplied from the control unit 817 of the copy control signal, denotes, the copy permission, the writing unit 814 records an output of the coding unit 813 in the registration means 815. When the signal 849 denotes the inhibition of copying, the writing unit 814 does not record the output of the coding unit 813 to the engraving means 815. As will be explained later, the code reading unit 816 executes a process for a broad inverse spectrum and generates the copying control code 838 and also generates the synthesis signal and a control signal 841 for synchronization control to the code change unit 818. As will be explained later, the code change unit 818 deletes the original copying control code by the broad inverse spectrum and, subsequently, synthesizes the new copying control code 839 across the broad spectrum. The code change unit 818 receives the control signal 841, which is used for synchronization control, which is executed by the broad inverse spectrum from the code reading unit 816.

The copy control code is, for example, a two-bit code and is information for instructing a control about copying, as shown below. 00: can be copied 01: undefined 10: copying of a generation 11 can be done: copying is inhibited. An embodiment of a copying system using a recording medium in which the synthesis signal to which the copying control code has been multi-scanned has been digitally recorded by the construction of Figures 7 and 8, will now be described with reference to Figure 9. In Figure 9, a reproducing apparatus 900 reproduces a recording medium 901, in which a synthesis signal has been digitally recorded. In the reproducing apparatus 900, a read signal 931 produced from the recording medium 901 for playback is set to a digital playback signal 932 by a reading unit 902 and input to a decoder unit 903 and decoded in a digital signal 933 by the decoding unit 903. In addition, the signal 933 is converted into an analog synthesis signal 934 by a DAC (digital / analog converter) 904. The analog synthesis signal 934 is supplied to an ADC 921 and a unit Reverse 923 of wide spectrum in a recording apparatus 920 through a communication path 911 of an analog interface 910. A copying control code, which is broad spectrum processed, has been added to the analog synthesis signal 934. In the recording apparatus 920, a digital signal 935 of information from the ADC 921 is coded by a coding unit 922. A coding signal 936 of the coding unit 922 is supplied to a writing unit 925. A write signal 939 from the unit of writing 925 is recorded on a recording medium 926. A signal 937, which is inversely extended by the inverse wide-spectrum unit 923 is input to a detector unit 924 of the copy control code, and a control code 938 of copying is detected. The writing unit 925 is controlled by the copy control code 938. When copying is permitted according to the copy control code 938, writing is performed. When copying is inhibited, writing is inhibited. As mentioned before, by adding the copy control signal to the same band as that of the signal of the information source in an analog way across the broad spectrum, an effect is obtained that even in the digital data recording apparatus, connected in an analogue way, the engraving can be controlled without extinguishing the copying control signal.

Figure 10 shows another embodiment of a copying system, according to the invention. In a manner similar to the embodiment of Figure 9, the reproducing apparatus 900 reproduces the recording medium 901, generates the analog synthesis signal 934, in which the analog information signal and the copying control code have been synthesized, and supplies the signal 934 to the recording apparatus 920 through the communication path 911 of the analog interface 910. The analog synthesis signal 934 is supplied to a code reading unit 927 of the recording apparatus 920 and a copy control code Multichannel 940 is extracted. A code change unit 929 is supplied to change the copying control code. The code change unit 929 generates a synthesis signal 945 in which the broad spectrum processed copy control code has been multichannelized to an analog information signal. The synthesis signal 945 is converted to the digital signal 935 by the ADC 921. The digital signal is supplied to the coding unit 922. In a manner similar to the previous mode, the output signal of the ADC 921 is recorded in the recording medium 926 by the coding unit 922. The copy control code 940, extracted by the code reading unit 927, is supplied to a control unit 928 of the copy control code. This control unit 928 decodes the original code 940 of the copy control and generates a copy control code 941, to be recorded again. The copy control code 941, after the change, is supplied to the code change unit 929 and the copy control code in the synthesis signal 945 is changed. For example, when the original copy control code indicated permission or inhibition of copying, the new copy control code is made identical to the original copy control code. When the original copy control code denotes the permission to copy a generation, the new copy control code is changed to the code indicating the inhibition of copying. As will be explained hereinafter, the code reading unit 927 executes a broad inverse spectrum process, generates the copy control code 940, and also generates the synthesis signal and a control signal 943, which is used for the control of the synchronization to the code change unit 929. As will be explained here after, the code change unit 929 clears the original control code by the broad inverse spectrum, which is controlled synchronously by the control signal 943 and, then, synthesizes the new copying control code 941 for the broad spectrum.

Figure 11 shows an example of code reading unit 927 (similar also to 816). The synthesis signal 934 is supplied to a multiplier 11 and a synchronous control circuit 12. A PN code (pseudo-noise) of a PN code generator 14 is supplied to the multiplier 11 and the synchronous control circuit 12. This synchronous control circuit 12 extracts the time signal 943 using the fact that the PN code has an exaggerated auto-correlation. An oscillation frequency and a phase of an oscillator 13 are controlled by the extracted time signal 943 and an output signal of the oscillator 13 is supplied to the PN key generator 14. This PN key generated from the output of the oscillator 13, which was synchronously controlled, and the synthesis signal 934 are multiplied by the multiplier 11, so that the demodulated copy control code 940 is derived from the multiplier 11. This code The copy control 940 is supplied to the control unit 928. Like the PN code, an M sequence (maximum length sequence), GOLD code or the like can be used. In the case of the sequence M, for example, the previous half sequence of its period and one bit on the minor significant side of the copy control code (two bits) are multiplied. The last half sequence of the period and one bit on the largest significant side are multiplied and the modulation of the broad spectrum is executed. One way to modulate the copy control code by the broad spectrum is not limited to such an example, and several other methods can be used. For example, after the copy control code has been linearly modulated, broad spectrum modulation can also be performed. The invention is not limited to direct modulation and the signal can also be modulated by a frequency standby method or a time-out method. In addition, different PN codes can also be used for the broad spectrum and a few classes of orthogonal codes can also be multiplied. Figure 12 shows an example? E of the code change unit 929 (similar also to 818). The synthesis signal 934 is supplied to a subtracter 31. A signal generated by the extension modulator unit 20 is supplied to the subtracter 31. This modulator unit 20 is constructed by a multiplier 21, an oscillator 23 and a PN code generator 24. The synchronization control signal 943 of the code reading unit 927 is supplied to an oscillator 23. An output of the oscillator 23 is supplied to the generator 24 of the PN code and this PN code in which a frequency and a phase are generated. they are the same as those in modulation. The same information 941a as the copy control code, extracted by the reading unit 927, is supplied from the control unit 928 to the multiplier 21. Therefore, by supplying an output of the multiplier 21 to the subtracter 31, the control code of modulation copying in the synthesis signal is erased. An output signal from the subtracter 31 is supplied to an adder 32. A signal, generated by an extension modulation unit 40, is supplied to the adder 32. The modulator unit 40 is constructed by a multiplier 41 and a code generator 44. PN. The output of the oscillator 23 of the modulation unit 20 is supplied to a PN code generator 44 and a PN code is generated in which a frequency and a phase are the same as those in the modulation. A copy control code 941b, to be added again, is supplied from the control unit 928 to the multiplier 41. Therefore, by supplying an output of the multiplier 41 to the adder 32, the copy control code can be added again. According to the above embodiment, the copying control code is synthesized in an analogical manner. However, in the invention, the information to be synthesized is not limited to the copying control code. For example, it is also possible to modulate the copyright address information by the broad spectrum together with the copy control code and to multichannel the resulting modulated information to the analog information signal. This copyright address information is the information that is necessary for a correct address of the author's name, reversion of the right regarding a literary work, conditions of use, identification number, and the like. Furthermore, the invention is not limited to the case of recording in the etching medium, but can also be applied to a case of transmission of analog information signals by cable or radio. That is, the additional information that has been modulated by the broad spectrum can also be added to the analog information signal to be transmitted. On the receiving side, the additional information is detected by the broad inverse spectrum and, based thereon, for example, the permission or inhibition of the reproduction of the analogue information signal on the receiving side is controlled. According to the invention, by the broad spectrum process, the additional information, such as the copy control signal or the like, the band widens and the additional information is added to the signal band of the information source, the Copy control signal can not be suppressed by a filter or similar. While synchronization can not be obtained for the period of time when the broad spectrum is performed, it is difficult to execute not only the detection of the copy control signal, but also the detection of the addition of the signal. Therefore, according to the invention, the copy control can be executed. with certainty. According to the invention, since the processed signal of the broad spectrum is added, an influence by a deterioration or the like is hardly exerted on the original data. According to the invention, as mentioned above, even after the digital signal was converted from D / A, the copy control signal is not erased. Therefore, the copy can be prevented by the digital data recording apparatus, which is connected in an analogous manner and the copy control signal is also preserved in the signal recorded in an analog recording apparatus. There is a very high copy prevention effect. Also, by multiplying the class of the broad spectrum and the orthogonal functions, the amount of information that can be added can be freely controlled. The present invention is not limited to the above embodiments and many modifications and variations are possible within the spirit and scope of the appended claims of the invention.

Claims (10)

1. CLAIMS 1. An information signal synthesizing apparatus, which comprises: a source of information, to generate a main information signal; a source of sub-information, to generate a sub-information signal; a broad-spectrum circuit for carrying out a broad-spectrum process to the sub-information signal, which is supplied from the sub-information source; and a synthesizer, to form a synthesis information signal, synthesizing the sub-information signal, which is supplied from the broad-spectrum circuit and subjected to a broad-spectrum process, and the main information signal from the source of information.
2. 2. An apparatus, according to claim 1, in which the sub-information signal is a copying control signal, to control a permission and an inhibition of a copying of the main information signal.
3. 3. An apparatus for recording information signals, which comprises: a source of information, to generate a main information signal; a source of sub-information, to generate a sub-information signal; a broad-spectrum circuit for carrying out a broad-spectrum process to the sub-information signal, which is supplied from the sub-information source; and a synthesizer, to form a synthesis information signal, synthesizing the sub-information signal, which is supplied from the broad-spectrum circuit and subjected to a broad-spectrum process, and the main information signal from the source of information; Y a recorder, to record the synthesis information signals, formed by the synthesizer, to a recording medium.
4. 4. An apparatus, according to claim 3, further having an analog / digital converter, for converting the synthesis signal formed by the synthesizer into a digital signal; and in that the recorder records the synthesis signal as a digital signal.
5. 5. An information signal recording apparatus, which comprises: an information reading circuit, to which an analog signal for synthesis of a main information signal and a copying control signal, which is processed by the broad spectrum, are supplied; and executing a broad reverse spectrum processed to the copy control signal processed by the broad spectrum, thereby reproducing the copy control signal; an analog / digital converter, to convert the synthesis signal into a digital signal; and a recorder, to which the digital output signal of the analog / digital converter and the copy control signal of the information reading circuit are supplied and in which a permission or an inhibition of the recording of the digital signal is controlled. output to the recording medium, according to the control signal of the copying.
6. 6. An information signal synthesizing apparatus, which comprises: an information reading circuit to which is supplied a synthesis signal of a main information signal and a sub-information signal, which was processed in broad spectrum, and the which executes a broad-spectrum process inverse to the broad-spectrum processed sub-information signal and reproduces this sub-information signal and produces the main information signal; a sub-information signal control circuit for changing the sub-information signal that was supplied from the information reading circuit, thus forming a changed sub-information signal; and a synthesizer, to which the changed sub-information signal is supplied, from the control circuit of the sub-information signal, and the main information signal from the information reading circuit, and which forms a signal of synthesis of the changed sub-information signal, which is processed in a broad spectrum, and the main information signal.
7. 7. An information signal recording apparatus, which comprises: an information reading circuit, to which is supplied the synthesis signal of a main information signal and a copying control signal processed in broad spectrum, and which executes a broad spectrum inverse process to the broad spectrum processed copy control signal, reproduces the copy control signal and produces the main information signal; a control circuit of the copying control signal, to change this copying control signal, which is supplied from the reading circuit, thus forming a changed sub-information signal; a synthesizer, to which the sub-information signal is supplied. changed and the main information signal from the information reading circuit, and which forms a synthesis signal of the changed sub-information signal, which is processed in a broad spectrum, and the main information signal; and a recorder, in which a permission and an inhibition of a recording of the synthesis information signal, formed by the synthesizer, are controlled to a recording medium, according to the copying control signal.
8. 8. A method for synthesizing information signals, which comprises the steps of: generating a main analog signal of information; generate a sub-information signal; execute a broad-spectrum process to the sub-information signal; and forming a synthesis information signal, synthesizing the sub-information signal processed in a broad spectrum, and the main information signal from the information source.
9. 9. A method for recording information signals, which comprises the steps of: executing a broad spectrum inverse process to a copying control signal processed in a broad spectrum, from an analog signal of synthesis of a main information signal and the signal of copying control processed in a broad spectrum and reproducing the copying control signal; converting the synthesis signal into a digital signal; and controlling a permission and an inhibition of a recording of the digital output signal to a recording medium, according to the copying control signal.
10. 10. A method for synthesizing information signals, which comprises the steps of: executing a broad spectrum inverse process to a sub-information signal processed in a broad spectrum, from a synthesis signal of a main information signal and the sub-information signal processed in broad spectrum, reproducing the information signal and producing the main information signal; change the sub-information signal and form a changed sub-information signal; and forming a synthesis signal of the changed sub-information signal, which was processed in a broad spectrum, and the main information signal of the changed sub-information signal and the main information signal.