Abstract:
The present invention teaches an optical storage disc having a first side having at least one data encoded layer, wherein the at least one data encoded area contains a digital asset in at least one format not readable by all conventional optical disc readers or reader/writers, and a second side having at least one data encoded layer, wherein the at least one data encoded area contains a digital asset in at least one format not readable by all conventional optical disc readers or reader/writers.

Description:
TECHNICAL FIELD 
     The present invention is generally related to optical storage media and more particularly related to an improved optical storage disc capable of storing data in multiple data formats. 
     BACKGROUND OF THE INVENTION 
     Digital storage systems are utilized to store digital assets such as video, audio, executable and non-executable computer programs, and data files. These systems generally utilize magnetic or optical media. Some systems, primarily of the magnetic type, are capable of a multiplicity of read/write cycles, while other systems primarily of the optical type, are capable of greater data storage densities but are usually limited to a single write cycle with a multiplicity of read cycles. 
     Although entities producing digital assets on optically readable discs may do so in a variety of formats, end users commonly have the equipment to read only a subset of the group of available formats. Because each format has an inherent set of available features which may lend the format to a particular type of digital asset, producers must limit themselves to the production of discs (and therefore the content features) having that combination of features required by the content which is most readily readable by the intended end user. 
     Digital assets are commonly written to 12.0 cm optical discs in one of the following formats: 
     CD-DA (Compact Disc-Digital Audio) 
     CD-ROM (Compact Disc-Read Only Memory) 
     CD-R (Compact Disc-Recordable) 
     CD-RW (Compact Disc-ReWritable) 
     “Mixed Mode” CD 
     Hidden Track (a.k.a. I-Track, ROM Ready, and AUDIOVISION™) 
     Enhanced Audio Product (a.k.a. SELECTWARE™) 
     CD+ (a.k.a. Stamped Multisession, and CD Extra) 
     CD-I Ready (Compact Disc-Interactive) 
     CD+G (Compact Disc+Graphics) 
     PHOTO CD 
     KARAOKE CD 
     DVD-ROM (Digital Versatile Disc-Read Only Memory) 
     DVD-Audio (Digital Versatile Disc-Audio) 
     DVD-Video (Digital Versatile Disc-Video) 
     DVD-RAM (Digital Versatile Disc-Random Access Memory) 
     DVD-R (Digital Versatile Disc-Recordable) 
     Divx-DVD 
     There are of course other formats and reader/writers capable of reading and/or writing in multiple formats. For example, certain DVD players are capable of reading CD-ROM discs in various formats and certain CD drives are capable of reading CD-DA, CD-ROM, CD-RW, CD-R, PHOTO CD, KARAOKE CD, ISO 9660, and HFS Discs. 
     There are also known to the art standards for recording various formats on a single sided optical disc. For example, the UNIVERSAL DISK FORMA™ (see  Universal Disk Format Specification , Optical Storage Technology Association OSTA-2 Revision 1.50, Feb. 4, 1997) and Mixed-Mode CD ROM (see  Integrating Mixed - Mode CD - ROM , CINRAM, J. Busk, Feb. 6, 1992). 
     Likewise, there are several methods known of recording optical media. For example, Horimai, U.S. Pat. No. 5,623,478 teaches recording a first and second pit string on opposite sides of a track center. Additionally, Slaten, U.S. Pat. No. 4,310,919 teaches a two sided video disc member wherein both sides contain digital information. Further, Hinz, U.S. Pat. No. 5,540,966 teaches a dual layer optical medium utilizing at least one partially reflective layer such that both layers may be read from a single optical storage disc side. 
     Thus the prior art teaches multi-layer optical discs, dual sided optical discs, multiple data formats, and readers capable of reading multiple formats. However, the prior art does not teach a dual sided optical disc having different formats on opposing sides. 
     SUMMARY OF THE INVENTION 
     The present invention teaches an optical disc having at least one data encoded area on each side. An optical disc of the present invention may be configured, in for example, in at least one of the following fashions: 
     
       
         
               
               
               
             
           
               
                   
                   
               
               
                   
                 Side One 
                 Side Two 
               
               
                   
                   
               
             
             
               
                   
                 DVD-Video 
                 DVD-Audio 
               
               
                   
                 DVD-Video 
                 CD-DA 
               
               
                   
                 DVD-RAM 
                 CD-ROM 
               
               
                   
                 DVD-Audio 
                 CD-DA 
               
               
                   
                 KARAOKE-CD 
                 CD-DA 
               
               
                   
                 KARAOKE-CD 
                 DVD-Audio 
               
               
                   
                 “Mixed Mode” CD (or MMVF) 
                 CD-DA 
               
               
                   
                 DVD-Video 
                 PHOTO CD 
               
               
                   
                 DVD-R 
                 CD-ROM 
               
               
                   
                 CD-I 
                 DVD-Video 
               
               
                   
                 Divx-DVD 
                 DVD-Video 
               
               
                   
                   
               
             
          
         
       
     
     Other combinations of various formats may also be configured such that entities producing digital assets may provide retailers and consumers with a wider range of products which require less shelf space. It is therefore, a primary object of the present invention to provide an improved optical disc. It is a further object of the present invention to provide an optical disc which is capable of at least one of being read by both standard Audio CD drives and computer CD drives, or DVD and Divx-DVD drives, or DVD drives and CD drives, or the like. It is still a further object of the present invention to provide an optical disc which is more economical to retailers in that it allows a greater number of products to be sold with a reduced amount of storage or display space. It is yet a further object of the present invention to provide users with optical discs which are configured to requirements. It is yet still a further object of the present invention to provide an optical disc which is easy to use, manufacture, and economical. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Embodiments of this invention will now be described, by way of examples only with reference to the accompanying drawings, in which: 
     FIG. 1 is a perspective view of a prior art retail display of optical discs showing the current requirement of having a large display area for various type of optical discs; 
     FIG. 2A is a highly diagrammatic side elevation of dual layer optical disc having a single data encoded layers on each side; 
     FIG. 2B is a highly diagrammatic side elevation of a dual layer optical disc having two data encoded layers on each side; 
     FIG. 2C is a highly diagrammatic side elevation of a dual layer optical disc having a single data encoded layer on a first side and two data encoded layers on a second side; 
     FIG. 3 is a block diagram illustrating exemplary embodiments of a few potential configurations of an optical disc of the present invention; 
     FIG. 4 is a perspective view of optical discs (in jewel cases or carriages) illustrating an exemplary embodiment of the present invention wherein a single optical disc of the present invention could contain a full-length motion picture on a first side, and the movie sound-track (or music videos) and a computer game or the like on a second side; 
     FIG. 5 is a perspective view of an optical disc of an exemplary embodiment of the present invention illustrating how an optical disc of the present invention could be played (read) using the conventional reading equipment currently utilized by most users. 
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS 
     Referring to the drawings, there is shown an optical disc  10  (including  10 ′ and  10 ″) in FIGS. 5 and 2A,  2 B, and  2 C which has two sides and at least one data encoded area per side. Each of the first and second sides ( 12  and  14 ) may contain at least one data encoded layer encoded with data of a particular type, by way of example only, DVD reader type data including certain DVD type formats and/or CD reader type data including certain DVD and CD type formats which are capable of being read by both certain DVD readers and CD readers (FIGS.  4  and  5 ). 
     Following are prophetic examples of various exemplary embodiments of the present invention: 
     A. Full-Length Motion Picture+Music Videos 
     In this embodiment a first side may contain a full-length motion picture on a first side in, for example, DVD-Video format, and a series of music videos on a second side, in for example DVD-Video format. 
     B. Full-Length Motion Picture+Full-Length Motion Picture 
     In this embodiment a first side may contain a first full-length feature motion picture in, for example, a pay-per-view type format such as Divx-DVD, and a second full-length non-feature motion picture in a non-pay-per-view format such as DVD-Video on a second side. 
     C. Full-Length Motion Picture+Audio 
     In this embodiment a first side may contain a full-length feature motion picture in for example, a pay-per-view type format such as Divx-DVD or a non-pay-per view type format such as DVD-Video, and a motion picture sound track on a second side in, for example a DVD-Audio or CD-DA format. 
     D. Full-Length Motion Picture+Catalog 
     In this embodiment a first side may contain a full-length feature motion picture in for example, a pay-per-view type format such as Divx-DVD or a non-pay-per view type format such as DVD-Video, and a catalog of movie previews or catalog and the like on a second side in, for example in a CD-ROM format or the like. 
     E. Full-Length Motion Picture+Computer Game 
     In this embodiment a first side may contain a full-length feature motion picture in for example, a pay-per-view type format such as Divx-DVD or a non-pay-per view type format such as DVD-Video, and a computer game (based on the movie or the like) on a second side in, for example, a CD-ROM, CD-I, or the like format. 
     F. Full-Length Motion Picture+Karaoke 
     In this embodiment a first side may contain a full-length feature motion picture in for example, a pay-per-view type format such as Divx-DVD or a non-pay-per view type format such as DVD-Video, and Karaoke on a second side in, for example, a KARAOKE CD format. 
     G. Full-Length Motion Picture+Still Photos 
     In this embodiment a first side may contain a full-length feature motion picture in for example, a pay-per-view type format such as Divx-DVD or a non-pay-per view type format such as DVD-Video, and still photos (from the motion picture or related photos and the like) on a second side in, for example, a PHOTO CD, CD-ROM, “Mixed Mode” CD, or the like. 
     H. Full-Length Motion Picture+Audio+Computer Game 
     In this embodiment a first side may contain a full-length feature motion picture in for example, a pay-per-view type format such as Divx-DVD or a non-pay-per view type format such as DVD-Video, and the movie sound track (or the like) and a computer game (based on the movie or the like) on a second side in, for example, a CD-ROM, “Mixed-Mode” CD, DVD-RAM, or the like format. 
     I. Music Videos+Audio 
     In this embodiment a first side may contain music videos in for example, a pay-per-view type format such as Divx-DVD or a non-pay-per view type format such as DVD-Video, and the audio (from the music videos or the like) in, for example, DVD-Audio, CD-DA, or the like format on the second side. 
     J. Audio+Computer Game 
     In this embodiment a first side may contain audio such as (instructional audio or music) in, for example, a DVD-Audio, CD-DA, or the like, and a second side may contain a computer game in, for example, a CD-ROM, DVD-RAM, or like format. 
     K. Computer Program+Computer Program Data (Read/Write) 
     In this embodiment a first side may contain a computer program (word-processor, spread-sheet, accounting package, operating system, or the like, and a second side may contain data produced, for example by a user utilizing said program on said first side on a second side in, for example, a CD-R, CD-RW, DVD-RAM, or the like format. 
     L. Computer Data (Read)+Computer Program Data (Read/Write) 
     In this embodiment a first side may contain computer data (zip-code directory, telephone directory, maps, or the like) in, for example, a read only format such as CD-ROM or the like, and a second side may contain related data in a read/write format. 
     M. Audio+Karaoke 
     In this embodiment a first side may contain audio and a second side may contain Karaoke video/audio. 
     N. Interactive Movie/Video Game+Video Game 
     In this embodiment a first side may contain an interactive movie video in, for example, a DVD type format, and a second side may contain a video game in, for example a CD-ROM or CD based game player format. 
     It should be appreciated that a retail store (FIG. 1) having displays of, for example, computer software  50 , music  40 , and movies  30 , may reduce the size (or increase the number of offerings) with the present invention. By way of example only, these three displays could be integrated into a single display area. 
     Likewise, it will be appreciated that a consumer may, by way of example only, purchase a single optical disc  10  (also  10 ′, and  10 ″) being capable of use in an automobile CD player  80 , a computer CD or DVD type drive  70 , or a home entertainment center player  60  or the like. 
     Thus, there has been described an optical disc providing at least all of the stated objects of the present invention. It will be apparent to the skilled practitioner other uses and combinations of formats may be utilized to meet other useful and commercial objects not stated or set forth herein, but which are still within the scope of the appended claims.