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  Recording medium, data recording method and apparatus, data regenerating method and apparatus, and copy control methodUSPTO Application #: 20070217605Title: Recording medium, data recording method and apparatus, data regenerating method and apparatus, and copy control method Abstract: Data is recorded in a first part PA1 in accordance with a signal format same as that of an existing CD at the lower limit (1.5 μm) of an allowable value of a track pitch and the lower limit (1.2 m/sec) of a linear velocity. As a result, the data for the maximum regeneration time (74.7 min) can be recorded in the first part PA1. An existing CD reproducing apparatus can reproduce the audio data recorded in the first part PA1 with no problem. Moreover, compressed and encrypted audio data is recorded in a second part PA2 at a single density or a double density. The single density represents a recording density same as that of an existing CD and the double density represents a density two time larger than the single density. Furthermore, the audio data recorded in the second part PA2 is charged when reproduced in order to protect copyrights. The format of the data recorded in the second part PA2 uses the format of a CD-ROM. (end of abstract) Agent: Lerner, David, Littenberg, Krumholz & Mentlik - Westfield, NJ, US Inventors: Yoichiro Sako, Tatsuya Inokuchi USPTO Applicaton #: 20070217605 - Class: 380201000 (USPTO) Related Patent Categories: Cryptography, Video Cryptography, Copy Protection Or Prevention The Patent Description & Claims data below is from USPTO Patent Application 20070217605. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a divisional of U.S. application Ser. No. 11/128,685, filed on May 13, 2005, which is a continuation of U.S. application Ser. No. 09/889,291, filed Jul. 13, 2001, now U.S. Pat. No. 6,971,024, which claims benefit from International Application No. PCT/JP00/08017, filed Nov. 14, 2000, which claims priority from Japanese Patent Application No. 326091/1999, filed Nov. 16, 1999 and Japanese Application No. 334979/1999, filed Nov. 25, 1999, the disclosures of which are hereby incorporated herein by reference. TECHNICAL INVENTION [0002] The present invention relates to recording medium, data recording method and apparatus, data reproducing method and apparatus, and a copy control method which are applied to a disc-like recording medium compatible with a so-called compact disc. BACKGROUND ART [0003] For compact disc (CD) and DVD (Digital Versatile Disc or Digital Video Disc) and the like, various copy-prevention arts for preventing illegal copy are proposed and practically used in order to protect copyrights. For example, SCMS (Serial Copy Management System) permits a first-generation copy from a CD to an MD (Mini Disc.TM.) but inhibits a second-generation copy from an MD to other medium. Moreover, a copy-generation restriction system is also known which restricts what-th generation copy can be generated. [0004] Moreover, music contents have been recently circulated in accordance with quick advancement of networks including Internet. Under the above situation, EMD (Electronic Music Distribution) using networks such as Internet and satellite broadcasting has been started and a copyright management method for EMD is proposed. In the case of EMD, a user can obtain music contents through charging. The above-described arts such as SCMS and copy generation restriction are going to be used for the EMD in order to prevent illegal copy. [0005] As described above, the conventional copyright protection method has restricted copy by using a copy prevention art to protect the right of a writer. Therefore, the method has been an obstacle for circulating music contents widely in a short time. For example, a due system is one of conventional copyright protection systems. This system is executed by a DAT (Digital Audio Taperecorder) or MD, in which a user of a digital recorder pays a compensation added to a product price. In these days in which networks are advanced, hardware (player or medium) does not frequently correspond to contents distributed through a network one to one so that the contents are received by a personal computer and reproduced and therefore, it cannot be said that the above due system is suitable as a copyright protection system. [0006] Moreover, a plurality of melodies are recorded in a medium such as a CD, a user may enjoy only one specific melody or only several melodies among the recorded melodies or may not want to buy the whole medium, that is, the DC. Furthermore, advertisement and circulation of music contents may be prevented due to a copying-prevention technique. It is possible to advertise and circulate the music contents for a short time by distributing the music contents free of charge and reduce the cost for advertisement and circulation of them. [0007] When considering the above point, it is preferable to use a system in which contents are circulated and widely distributed free of charge and charged when reproducing the contents so that the contents are easily and quickly circulated and a writer can obtain a legal compensation. To realize the above system, it is necessary that contents recorded in a medium are encrypted. Moreover, it is considered to construct a system that is charged when the encrypted contents are reproduced. However, there is a problem that a recording medium storing encrypted contents such as a disk cannot be reproduced by an existing disk reproducing apparatus such as a CD reproducing apparatus. [0008] Moreover, it is preferable that copy (redistribution) can be freely performed in addition to the fact that contents can be circulated and distributed free of charge. In this case, encrypted contents are copied. It is preferable that the copying time required is short. [0009] Therefore, it is an object of the present invention to provide a recording medium storing contents that can be charged when decoded by being encoded while securing the compatibility with an existing data-recording medium. [0010] Moreover, it is another object of the present invention to provide a recording medium for recording and reproducing data in and from the former recording medium and controlling copy, data recording method and apparatus, data reproducing method and apparatus, and a copy control method. DISCLOSURE OF THE INVENTION [0011] To solve the above problems, the invention of claim 1 is a data-recording medium for storing data by dividing a recording area into at least first and second recording areas, characterized in that [0012] first data recorded in the first recording area is unencrypted data and at least a part of second data recorded in the second recording area is encrypted data, and [0013] compression rates of the first data and second data are made different from each other. [0014] The invention of claim 13 is a discoid recording medium whose disk dimensions, track pitch, and minimum pit length are respectively specified in accordance with a standard, comprising [0015] a first recording area allowing data for the specified maximum regeneration time to be recorded by storing first data in accordance with the lower limit of an allowable width of the track pitch and the lower limit of an allowable width of the minimum pit length; [0016] a second recording area allowing second data to be recorded; characterized in that [0017] the first data and second data are discontinuously recorded. [0018] The invention of claim 27 is a data recording method for recording data in a recording medium shows recording area is divided into at least first and second recording areas, comprising the steps of: [0019] recording first data which is unencrypted data in a first recording area and recording second data at least a part of which is encrypted in a second recording area; and [0020] making compression rates of the first and second data different from each other. Continue reading... Full patent description for Recording medium, data recording method and apparatus, data regenerating method and apparatus, and copy control method Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Recording medium, data recording method and apparatus, data regenerating method and apparatus, and copy control method patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. 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