Abstract:
A method of managing content, the method being performed by a device including an analyzing unit and a control unit. The method includes judging, via the analyzing unit, whether the content can be moved to an external entity based on moving control information, the moving control information being different from copy control information indicating whether the copy of the content is permitted, determining whether an authentication with the external entity is needed in order to move the content to the external entity, if the judging step judges that the content can be moved, and controlling, via the control unit, a moving operation of the content to the external entity such that the content can be moved to the external entity without the authentication if the determining step determines the authentication is not needed.

Description:
This application is a Continuation of application Ser. No. 10/022,889, filed on Dec. 20, 2001 now U.S. Pat. No. 6,965,975, the entire contents of which are hereby incorporated by reference and for which priority is claimed under 35 U.S.C. §120. 

   BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to an apparatus and method for moving contents, particularly, to an apparatus and method for moving contents capable of moving contents having a restricted number of copies to another storage media. 
   2. Description of the Background Art 
   Recently, due to a rapid; growth of computer and communication technologies, information and communication have become more important in everyday life as well as in science and business. Particularly, in the current information age, since every country in the world is constructing high-speed communications networks, various information will be provided, transmitted and consumed and a considerable part of such information will be secured by copyright laws. 
   Recorders, video recorders and copy machines using the analog method make differences in quality between the original and the copy in costs, time and convenience, and accordingly, those things do not significantly affect the copyright. 
   However, work on information and communication media such as the Internet significantly affect copyright laws since the copy and the original are 100% identical and through the Internet images and voices as well as texts can be transmitted to the entire world. Also, in the broadcasting field, the TV transmitting method is digitized by generalization of the digital compression technology and the development of inexpensive receivers, and accordingly, copying contents through broadcasting significantly affects copyright laws. 
   In the information age where all works such as images and records are digitized, infringement of copyright laws has become easy and is done in various forms, and accordingly, exposing and getting rid of infringement of copyright laws is difficult. 
   Therefore, since writing is decreased and distribution of intellectual property rights is hindered unless the infringement of intellectual properties is prevented or the technologies for exposing the infringement is prevented, enterprises related to copyrights are making significant efforts to develop copy protecting technology as a technological means to secure works. 
   In the present, as a general technology for protecting a copy, there is a method of restricting the number of copies to a certain number by inserting a copy control code in a header part of contents. The above technology will be applied to broadcasting contents as the digital broadcasting is popularized, and the technology is partly now in use. 
     FIG. 1  is a schematic block diagram showing a copy apparatus of a conventional digital broadcast receiver. 
   As shown in  FIG. 1 , the conventional digital broadcast receiver includes a TV broadcast receiver  100  for receiving contents which a broadcasting station transmits, and a recording apparatus  200  for storing the received contents. 
   The above TV broadcast receiver  100  includes a receiving unit  110  for receiving the contents, and a first storage medium  120  for storing the contents supplied from the receiving unit  110 . Further, the recording apparatus  200  includes a second storage medium  210  for storing the contents transmitted from the first storage medium  120 . 
   The operation of a copying apparatus for the conventional digital broadcasting receiver will be described with reference to accompanied drawings as follows. 
   The receiving unit  110  of a TV broadcasting receiver receives contents transmitted through transmission media such as a broadcast satellite or cable and stores the contents in the built-in first storage medium  120 . At this time, the possible number of copies of the contents is decreased by one. 
   With the above storage method, the contents can be stored by the storage command of a user or new contents can be continuously stored by automatically deleting old contents at a certain time interval according to the composition of the TV broadcast receiver  100 . 
   Later, when the user wants to copy the contents to the second storage medium, the TV broadcast receiver  100  reads the contents from the first storage medium and judges the possible number of copies by analyzing the copy control code inserted in the header part of the contents. 
     FIG. 3  is a view showing a packet including a header in accordance with a conventional data packet. A “DATA LENGTH” field specifies the length of the data field of a data block payload packets and data block packets; a “TAG” field provides a high-level label for the format of data carried by the packet; a “CHANNEL” field specifies the channel number for the packet; a “TCODE” field represents a transaction code, which specifies the packet format and the type of transaction to be performed; and an “SY” field represents a synchronization code, and is an application-specific control field. 
   At this time, as shown in  FIG. 3 , the copy control code uses 2 bits among 4 bits of synchronous bits in the header part of the data packet and is divided to an unrestricted copy, a restricted copy, a single copy and no copy according to the set values (00,01,10,11). Also, the other 1 bit is used in an encryption code of the data stream and the least significant bit of the synchronous bits is a reserved bit and is not used. 
   Namely, as shown in  FIG. 2 , if the copy control code is set as an unrestricted copy (S 201 ), the TV broadcast receiver  100  does not convert the copy control code and copies the contents to the second storage medium (S 202  and S 203 ). If the copy control code is set as restricted copy (S 204 ), the receiver  100  stores the contents in the second storage medium  210  after decreasing by one from the possible number of copies and by converting the copy control code (S 205  and S 206 ). On the contrary, if the copy control code is set as no copy, the TV broadcast receiver  100  cannot copy the contents to the second storage medium regardless of the demand of the user (S 207 ). 
   By the way, the first storage medium  120  is restricted in capacity. Therefore, if the copy control code is set to no copy in case the user of the digital broadcast receiver is willing to store the contents for a long time or edit the contents, a copying or editing of the contents from the first storage medium  120  to the second storage medium  210  is impossible. 
   SUMMARY OF THE INVENTION 
   Therefore, an object of the present invention is to provide an apparatus and method for moving contents capable of moving the position of stored contents under the condition that the number of contents is not increased. 
   Another object of the present invention is to provide an apparatus and method for moving contents capable of efficiently moving contents having a restricted number of copies to another storage media. 
   To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided an apparatus for moving contents comprising an input unit for inputting contents and a control unit for controlling the moving of the contents to another medium by analyzing a copy control code of the contents. 
   To achieve the above objects, there is provided a method for moving contents comprising the steps of analyzing a copy control code of the contents when a user selects moving of the contents from a first storage medium to a second storage medium and storing the contents the contents in the second storage medium by converting the copy control code of the contents according to the result of analysis. 
   The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. 
     In the drawings: 
       FIG. 1  is a schematic block diagram showing a conventional copy apparatus; 
       FIG. 2  is a flowing chart showing a method for copying contents of  FIG. 1 ; 
       FIG. 3  is a view showing a header of a conventional data packet; 
       FIG. 4  is a block diagram showing an apparatus for moving contents in accordance with the present invention; 
       FIG. 5  is a flowing chart showing a method for moving contents in accordance with the present invention; 
       FIG. 6  is a detailed flowing chart showing the step for moving contents of  FIG. 5 ; and 
       FIG. 7  is a view showing a header of the packet in accordance with the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. 
     FIG. 4  is a block diagram showing an apparatus for moving contents in accordance with the present invention. 
   As shown in  FIG. 4 , an apparatus for moving contents in accordance with the present invention includes a TV broadcast receiver  400  for analyzing a copy control code of contents received from a broadcasting station, converting the copy control code according to the result of the analysis and outputting the converted code. Also included is a second storage medium  500  for storing the contents moved from the TV broadcast receiver  400  through an interface means. 
   The TV broadcast receiver  400  includes a receiving unit  410  for receiving the contents, a first storage medium  420  for temporarily storing the contents received from the receiving unit  410 , a copy control code analyzing unit  430  for analyzing a copy control code of the contents stored in the first storage medium  320 , a control unit  440  for controlling the operation of each unit needed to move the contents such as fetching, deleting and code converting from the first storage medium  420 , a copy control code converting unit  450  for converting the copy control code of the contents according to the control of the control unit  440  and a data outputting unit  460  for transmitting contents fetched from the first storage medium having the converted copy control code to the second storage medium. 
   At this time, the second storage medium  500  can be included in the TV broadcast receiver  400 , and can be independent out of the receiver using a connection means such as a cable or can be included in another apparatuses (for example, a VCR for performing recording). 
   The operation of the apparatus for the moving the contents in accordance with the present invention will now be described with reference to  FIGS. 5 and 6 . 
   The receiving unit  410  of the TV broadcast receiver receives the contents transmitted through the media such as a broadcasting satellite or a cable and stores the contents in the first storage medium  420 . At this time, the possible number of copies of the contents is decreased by one. 
   Later, when the user requests moving the contents, the control unit  440  checks whether the TV broadcast receiver and the second storage medium  500  are connected (S 501  and S 502 ). If they are connected, the control unit  440  judges whether an authentication is needed between the TV broadcast receiver  400  and the second storage unit  500  by analyzing the copy control code of the contents (S 503 ). 
   Further, if the copy control code of contents is set as an unrestricted copy, the contents do not need any authentication. But if the copy control code of the contents is set as restricted copy or no copy, the contents are to be authenticated to maintain the restricted number of copies. 
   Therefore, the control unit  440  performs the step  506  when the copy control code is set as an unrestricted copy. However, when the copy control code is set as restricted copy or no copy, mutual authentication is performed between the TV broadcast receiver  400  and the second storage medium  500  (S 504  and S 505 ). At this time, since the TV broadcast receiver  400  and the second storage medium  500  are authenticated by each peculiar key values, in case a medium rejects the authentication demand or the authentication is not succeeded, moving the contents is not possible (S 508 ). 
   When the authentication between the TV broadcast receiver  400  and the second storage medium  500  is performed successfully (Yes in S 505 ), the control unit  440  controls the moving the contents stored in the first storage medium  420  to the second storage medium  500  only when the second storage medium  500  can be written to (S 506  and S 507 ). 
     FIG. 6  is a detailed flowing chart showing the step of moving the contents (S 507 ). 
   As shown in  FIG. 6 , in the step of moving (S 507 ), the moving operation is performed according to the possible number of copies determined by analyzing the copy control code inserted in the header part of the contents. 
   Namely, if the copy control code is set as an unrestricted copy (possible number of copy is N, N=∞), the copy control code is not converted by the copy control code converting unit  450  (S 601  and S 602 ). Later, the control unit  440  stores the above contents to the second storage medium  500  through the data outputting unit  460  (S 603 ). 
   Also, if the copy control code is set as a restricted copy (N=n), the copy control code of the contents stored in the first storage medium  420  is decreased by one by the copy control code converting unit  450  (S 604  and S 605 ). The control unit  440  then stores the contents in the second storage medium  500  through the data outputting unit  450  (S 606 ). 
   Also, if the copy control code is set as no copy (N=0), the copy control code of the contents stored in the first storage medium  420  is changed to a single copy by the copy control code converting unit  450  (S 607  and S 608 ) in order to move the contents from the first storage medium  420  to the second storage medium  500 . Here, when the copy control code is set to no copy, the copy control code is set as a single copy or no copy before the contents are stored in the first storage medium  420 . At this time, when the copy control code of the contents is set to no copy, this case is not included in the present invention, because the contents cannot be stored in the first storage medium  420 . However, when the copy control code is set to no copy by being stored in the first storage medium  420 , the present invention is applied to the case. Later, the control unit  440  stores the contents to the second storage medium  500  through the data outputting unit  460  and then moving the contents is completed by deleting the original written in the first storage medium  420  (S 609  and S 610 ). 
   Since the contents are moved as above, the number of the contents is same as that of before the movement. 
   As another embodiment from the above moving method, the present invention sets a moving determination bit in the contents in advance and accordingly, moving of the contents can be performed according to the moving determination bit. 
   Namely, as shown in  FIG. 7 , the present invention sets the least significant bit as a moving determination bit in the synchronous bits and if the contents can be moved, the moving determination bit is set as “1” and if the contents can not be moved, the moving determination bit is set as “0”. 
   Therefore, if the user requests moving the contents to the second storage medium  500  after the contents are temporarily stored in the first storage medium  420  by being received in the receiving unit  410  of the TV broadcast receiver  400 , the control unit  440  can judge whether or not the contents can be copied in advance according to the moving determination bit after reading the moving determination bit of the contents. 
   Namely, unless the moving determination bit is set as capable of being moved, the contents can not be moved to the second storage medium  500  and accordingly, the contents can be stored with the copy method as in  FIG. 2  of the conventional art. However, if the moving determination bit is set as capable of being moved, the contents can be moved in the second storage medium  500  as in the process shown in  FIGS. 5 and 6 . 
   As another embodiment from the above TV broadcasting receiver  400 , the present invention can be embodied as a processor (not shown) which includes units of the TV broadcasting receiver  400 , or as a processor (not shown) which is programmed with the above method of moving contents. 
   The method of moving the contents is that the user moves the contents to the second storage medium  500  by analyzing and converting the copy control code of the contents after the contents are stored the first storage medium  420 , as described above. However, the first storage medium  420  can be included in the Personal Video Recorder, and can be included in another apparatuses (for example, Personal Computer, Digital Video Disc, Digital Video Home System) using a connection means (for example, IEEE1394, Universal Serial Bus). 
   As described above, the apparatus and method for moving the contents can move the storing position of the contents and not increases the number of the contents. 
   As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not restricted by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalence of such meets and bounds are therefore intended to be embraced by the appended claims.