JP4497353B2 - Portable terminal device and content recording method - Google Patents

Description

  The present invention relates to a primary storage device that stores content data such as music and video, a portable terminal device that includes a writing unit that writes content data stored in the primary storage device to a secondary storage device, and uses this Related to the content recording method.

  In recent years, content data such as music data and video data reproduced by a CD player, for example, is stored as a primary recording medium, for example, an HDD (hard disk drive) of a personal computer, and the stored content data is transferred to other data. A use form of recording on a recording medium (secondary recording medium) and enjoying reproduction of music or the like on the secondary recording medium side is becoming widespread (for example, see Patent Document 1).

  In this case, the HDD stores content data such as music reproduced from package media such as CD-DA (Compact Disc Digital Audio) and DVD (Digital Versatile Disc), or a communication network to which a personal computer is connected. Content data downloaded from an external music server or the like is stored. Then, the user connects the recording device of the secondary recording medium to the personal computer, copies or moves the content data stored in the HDD to the secondary recording medium, and plays music or the like on the playback device corresponding to the secondary recording medium. Content data is played back.

On the other hand, in recent years, mobile phones have become more multifunctional, and have the above-mentioned memory function as a primary recording medium and a function for writing to a secondary recording medium, and acquire, record, and play back content data such as music. At the same time, it can be copied and moved to another secondary recording medium. As another function of such a cellular phone, for example, it is possible to set a playback portion of content data recorded on a primary recording medium, and use the set portion as a sound source such as a ringing melody or a time signal Various models are also becoming popular.
JP 2002-373470 A

  However, as described above, the content data acquisition route includes a so-called self-recording route for recording (recording) data reproduced by a CD player, a DVD player, etc. within a personal use range, as well as a communication network such as the Internet. There are a wide variety of Internet distribution routes that are downloaded via the Internet.

  Most content data should be protected by copyright, and the distribution route needs to be managed by the content data provider. Therefore, depending on the distribution route of the content data, it may be necessary to restrict the copying or movement of the content data on the provider side.

  In particular, since the content data distributed via the communication network as described above has a remarkably high propagation speed, it is necessary to appropriately restrict copying and movement when downloaded by a mobile terminal device. On the other hand, there is a high demand for miniaturization of portable terminal devices. However, the addition of dedicated hardware and software for restricting duplication and movement causes the device to become complicated and large, which is contrary to the requirements for downsizing the device and special operations for that purpose. And the burden on the user increases.

  The present invention has been made to solve the above-described problem. In response to a request for downsizing of a mobile terminal device, the usability of content data distributed via a communication network is improved and content data is illegally processed. An object of the present invention is to provide a portable terminal device capable of preventing re-distribution and ensuring copyright protection and a content recording method using the portable terminal device.

In order to solve the above-described problem, the mobile terminal device according to the present invention provides
A primary storage device serving as a built-in storage device for storing content data;
  A detachable external storage device, a secondary storage device for writing content data stored in the primary storage device, and
  A key management unit storing a self-recording key for performing encryption processing on the content data;
  Content with playback prohibition part definition flag that defines a part that prohibits playback as a ringing melody, write permission / non-write flag that defines whether or not writing to the primary storage device and writing to the secondary storage device is possible A content data capture unit for capturing data;
  When the content data is taken in via the content data take-in unit, a primary determination that determines whether or not the content data can be written to the primary storage device based on the writability flag attached to the content data A storage flag determination unit;
  A recording unit that writes the content data to the primary storage device when the primary storage flag determination unit determines that the writing of the content data to the primary storage device is permitted;
  Of the content data written in the primary storage device, the content data is set when an incoming call setting point indicating a start point and an end point of a portion to be reproduced as a ringing melody is set by the user via the operation unit. By referring to the reproduction prohibition part definition flag attached to, it is determined whether or not the incoming call setting point corresponding to the setting operation is a part where reproduction as a ringing melody is prohibited. Only when it is determined that the incoming call setting point corresponding to the setting operation is not a portion where reproduction as a ringing melody is prohibited, the incoming call setting point corresponding to the setting operation is written to the primary storage device. An incoming call setting part to be written in the header part of the content data,
  When the content data written in the primary storage device is played back as an incoming melody, the incoming call setting point written in the header part of the content data is referred to and only the portion corresponding to the incoming call setting point is received. A playback control unit that controls playback as a melody,
  When writing the content data stored in the primary storage device to the secondary storage device, the secondary data is based on the write permission flag attached to the content data stored in the primary storage device. A secondary storage flag determination unit that determines whether or not the content data can be written to the storage device;
  When the secondary storage flag determination unit determines that writing of the content data to the secondary storage device is permitted, the format of the content data is changed to the format for the secondary storage device. A format conversion unit for conversion processing;
  An encryption unit that performs an encryption process based on the self-recording key read from the key management unit with respect to the content data that has been subjected to the format conversion process by the format conversion unit;
  An external storage writing unit for writing the content data subjected to the encryption processing by the encryption unit to the secondary storage device;
  Have

In order to solve the above-described problem, the content recording method according to the present invention provides:
A reproduction prohibition part definition flag in which the content data capturing unit defines a part that prohibits reproduction as an incoming melody, whether or not data can be written to a primary storage device serving as a built-in storage device, and a removable external storage device A content data fetching step for fetching content data with a write enable / disable flag defining whether or not to write to the secondary storage device for writing content data stored in the primary storage device;
  When the content data is fetched in the content data fetching step, the primary storage flag determination unit determines whether the content data is stored in the primary storage device based on the writability flag attached to the content data. A primary storage flag determination step for determining whether or not writing is possible;
  When the primary storage flag determining step determines that the writing of the content data to the primary storage device is permitted, the recording unit writes the content data to the primary storage device; and
  Of the content data written in the primary storage device, when an incoming call setting point indicating a start point and an end point of a portion to be reproduced as a ringing melody is set by the user via the operation unit, an incoming call setting unit However, by referring to the reproduction prohibition part definition flag attached to the content data, whether or not the incoming call setting point corresponding to the setting operation is a part where reproduction as a ringing melody is prohibited. Only when it is determined that the incoming call setting point corresponding to the setting operation is not a portion where reproduction as a ringing melody is prohibited, the incoming call setting point corresponding to the setting operation is changed to the primary operation. An incoming call setting step for writing in the header portion of the content data written in the storage device;
  When the content data written in the primary storage device is played back as an incoming melody, the playback control unit refers to the incoming call setting point written in the header part of the content data and corresponds to this incoming call setting point. A playback control step for controlling playback of only the part to be played as a ringtone,
  When the content data stored in the primary storage device is written to the secondary storage device, the secondary storage flag determination unit adds the content data stored in the primary storage device to the content data. A secondary storage flag determination step for determining whether the content data can be written to the secondary storage device based on the availability flag;
  When it is determined in the secondary storage flag determination step that the writing of the content data to the secondary storage device is permitted, the format conversion unit converts the format of the content data into the secondary storage. A format conversion step for converting into a format for the device;
  The encryption unit reads the self-recording key from the key management unit in which the self-recording key for performing encryption processing on the content data is stored, and the format conversion process is performed in the format conversion step. An encryption step for performing encryption processing on the content data based on the read self-recording key;
  An external storage writing unit, wherein the external storage writing unit writes the content data subjected to the encryption process in the encryption step to the secondary storage device;
  Have

In the present invention , when content data is written to the primary storage device or the secondary storage device, the write enable / disable flag attached to the content data is referred to, and the write to the primary storage device is performed based on the write enable / disable flag. Alternatively, content data is written into the primary storage device or content data is written into the secondary storage device only when writing to the secondary storage device is permitted. Thus, only by providing a primary storage flag determination unit and a secondary storage flag determination unit for determining whether or not writing to the primary storage device or the secondary storage device is performed based on the write permission flag attached to the content data. Content data duplication, movement, and illegal secondary recording can be restricted. Therefore, duplication, movement, and illegal secondary recording of content data can be realized with extremely small hardware and software corresponding to the primary storage flag determination unit and the secondary storage flag determination unit. Therefore, it is possible to meet the demand for downsizing of the apparatus.

Further, duplication, movement, and illegal secondary recording of content data can be restricted by operations similar to conventional self-recording operations without forcing the user to perform special operations. For this reason, the usability of content data can be improved. In addition, when content data is written to the secondary storage device, a write permission determination is performed based on the write permission flag, and the content data written to the secondary storage device is encrypted based on a self-recording key. Since the processing is performed, unauthorized redistribution of the content data can be prevented, and copyright protection of the content data can be ensured.

In addition, the content data is provided with a reproduction prohibition part definition flag that defines a part that prohibits reproduction as a ringing melody. Of the content data written in the primary storage device, a part of the content data to be reproduced as a ringing melody is attached. Corresponding to the setting operation by referring to the reproduction prohibition part definition flag attached to the content data when the incoming call setting point indicating the start point and the end point is set by the user via the operation unit. The incoming call setting point is determined as to whether or not the reproduction as the incoming melody is prohibited. Only when it is determined that the incoming call setting point corresponding to the setting operation is not a portion where reproduction as a ringing melody is prohibited, the incoming call setting point corresponding to the setting operation is determined as the primary storage device. When writing to the header of the content data written in the above and playing it as a ringtone melody, refer to the ringtone setting point written in this header and only the part corresponding to this ringtone setting point is the ringtone. As playback control. As a result, the content copyright holder attaches a playback prohibition part definition flag that defines a part that prohibits playback as an incoming melody to the content data, so that a part other than the part defined by the playback prohibition part definition flag can be obtained. The incoming call setting point can be set only for the portion. In other words, in the entire content, the portion that the user can use as the incoming melody can be limited to only the portion permitted by the copyright holder of the content. Thereby, the copyright protection of the content data can be further ensured.

The present invention can improve the usability of content data while responding to a request for downsizing of the device , prevent unauthorized redistribution of content data, and ensure copyright protection. In addition, the portion of the entire content that can be used by the user as the incoming melody can be limited to only the portion permitted by the copyright holder of the content, thereby further ensuring the copyright protection of the content data. be able to.

(Content distribution system configuration)
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing a content distribution system according to the present embodiment. In the present embodiment, the mobile terminal device of the present invention is used for primary recording and secondary recording of content distributed by the content distribution system.

  As shown in the figure, the content distribution system is a wireless communication that performs wireless communication between a mobile phone 1 used by a user, a content server 2 and an authentication server 3 arranged on a communication network 4, and the mobile phone 1. And base station 5.

  The communication network 4 is a distributed type constructed by mutually connecting various communication lines (public lines such as telephone lines, ISDN lines, ADSL lines, private lines, wireless communication networks) using the communication protocol TCP / IP. It is a communication network, and this IP network includes LANs such as 10BASE-T and 100BASE-TX intranets (enterprise networks) and home networks.

  The content server 2 is a server computer that distributes distribution content M1 such as HTML (HyperText Markup Language) files, image files, music files, etc. in documents such as WWW (World Wide Web) or software having the function. Then, information such as HTML documents and images is stored, and the information is transmitted through the communication network 4 by a protocol such as HTTP or FTP.

  The authentication server 3 is a server that receives authentication information such as an ID and a password from the mobile phone 1 when the mobile phone 1 accesses the content server 2 and confirms the access right of the user. The content server 2 distributes the content to the user whose access right is recognized by the authentication server 3.

(Configuration of mobile phone)
The mobile phone 1 is a portable mobile communication terminal using wireless communication, wirelessly communicates with a relay point such as the wireless base station 5, and can receive communication services such as calls and data communication while moving. it can. Examples of the communication system of the cellular phone 1 include an FDMA system, a TDMA system, a CDMA system, W-CDMA, a PHS (Personal Handyphone System) system, and the like. The mobile phone 1 is equipped with functions such as a digital camera function, an application software execution function, or a GPS function, and can execute various types of information processing.

  The mobile phone 1 also has a function of primary recording and playback of self-recording content M1 played back by a CD player or the like, a function of downloading distribution content M2, a primary-recorded self-recording content M1 and distribution. And a function of secondarily recording the content M2 on a memory card 7 as a secondary recording medium.

FIG. 2 is a block diagram showing an internal configuration of the mobile phone 1 according to the present embodiment. As shown in the figure, in the mobile phone 1, modules such as circuits, devices, and software are connected to a control line 150 for transmitting and receiving control signals and a data line 160 for transmitting and receiving data, and control signals and The antenna 104 a that realizes each function by transmitting and receiving data is, for example, a built-in antenna for transmitting and receiving signal radio waves, and is connected to the communication circuit 104. The communication circuit 104 performs frequency conversion, modulation and demodulation of transmission / reception signals, spectrum spreading and despreading, discrimination of transmitted / received data as call voice data or other data, and the like. The data other than the call voice data is image data, e-mail, program data, and other data. The received call voice data is sent to the CPU 130 via the data line 160.

  The CPU 130 decodes the call voice data as a signal processing means, and sends the decoded voice data to the speaker 112b via the data line 160.

  The display unit 112a and the speaker 112b are video and audio output devices that acquire data through the data line 160, convert the data into predetermined signals (video signal and audio signal), and output the signals. The display unit 112a is a display device such as a liquid crystal display that outputs input based on a user operation or character information or video included in content such as a moving image or a still image. The speaker 112b includes a digital / analog converter and an amplifier, and outputs the audio data after digital / analog conversion and amplification.

  The operation unit 116 is an operation device operated by a user, such as a key, a call key, and a disk-type jog dial. When each key, disk type jog dial, or the like is operated by the user, the operation unit 116 generates an operation signal corresponding to the user operation and sends the operation signal to the control unit 120.

  The RAM 106a and ROM 106b are a control program for the control unit 120 to control each unit, various initial setting values, phone numbers of the mobile phone terminals, font data, dictionary data including candidate words for predictive conversion at the time of character input, and others Further, it stores program codes for various applications such as an application program for mail function and an application program for music playback, identification information (telephone number and user ID) of the mobile phone terminal, and the like. Further, the RAM 106a and the ROM 106b temporarily store data as needed as a work area when the control unit 120 performs various data processing or a work area during decompression decoding processing of compression-encoded music data.

  Furthermore, in the present embodiment, these RAM 106a and ROM 106b function as a primary storage device for content data, and can also store music data and video data that have been compression-encoded.

  The control unit 120 controls each component of the mobile phone 1 and performs various arithmetic processes via the control line 150. In addition, the control unit 120 receives an operation signal from the operation unit 116, and performs processing and calculation according to the operation signal.

  The external storage / writing unit 111 is a slot or the like into which a medium such as a memory card is inserted, and the external device interface 101 is a connector or the like to which a communication cable or the like is connected. Data is written and transmitted by signals. In the present embodiment, the external storage writing unit 111 is a drive device that writes data to the memory card 7 in a predetermined format. The external device interface 101 is connected to a playback device 6 such as a CD player or an MD player via a cable, and the self-recording content M1 output from the playback device 6 is input.

  The memory card 7 is a secondary storage device in which encrypted content data is recorded, and is a card-type recording medium using a semiconductor memory such as a flash memory. As the secondary storage device, a mini-disc as a magneto-optical disc, a CD-R (CD Recordable), a CD-RW (CD Rewitable), a DVD-RAM, a DVD-R, a DVD-RW, or the like is adopted. You can also.

(Self-recording function)
The cellular phone 1 having the above configuration is provided with a self-recording function for temporarily storing the content reproduced and output by the reproduction device 6 as self-recorded content. This self-recording function is realized mainly by the external device interface 101, the CPU 130, and the built-in memory 106 (RAM 106a and ROM 106b). FIG. 3 is a functional block diagram showing functions of the mobile phone 1. As shown in the figure, a self-recording unit 102 is connected to the external device interface 101, and the self-recording unit 102 is connected to a built-in memory 106.

  The self-recording unit 102 receives content data input through the external device interface 101, and the flag of the input content is determined by the flag determination unit 105. The flag determination unit 105 is a module that determines a flag that is added to content and defines whether or not the content can be recorded.

  When content that has already been primarily recorded is input to the mobile phone 1, the mobile phone 1 becomes a secondary recording medium, and when the mobile phone 1 is the first recording medium, the mobile phone 1 becomes the primary recording medium. . Therefore, in this embodiment, when transferring to the mobile phone 1, the flag determining unit 105 detects and determines whether the mobile phone 1 is a primary recording medium or a secondary recording medium. In the present embodiment, this flag is included in the content ID added to each content, and is an identifier that counts the number of times reproduction is prohibited or recorded (moved).

  More specifically, the content ID is an identifier used for content right management on the primary recording medium side and the secondary recording medium side, and the content right here refers to the primary recording medium (mobile phone 1) side, This is a right to transfer to the secondary recording medium (right to copy to the secondary recording medium), and the right to reproduce the copied content data on the secondary recording medium side. Content recording includes transfer of content data from the primary recording medium to the secondary recording medium (right transfer), so-called “checkout”, and return of content data from the secondary recording medium to the primary recording medium (actually (Return of rights), so-called “check-in”.

  Regarding these check-out and check-in, a transfer handling rule (Usage Rule) is determined. For example, the number of check-outs from a primary recording medium to a secondary recording medium is limited for one content data. be able to. For example, when the number of checkouts is allowed three times, the transfer right is “three times”, and when the checkout is performed, the right is transferred to the secondary recording medium side, and on the primary recording medium side, The remaining transfer right of the content data is twice. At this time, the right of reproduction is obtained on the secondary recording medium side. In addition, when a check-in is performed from the secondary recording medium to the primary recording medium, the right is returned, the reproduction right is lost on the secondary recording medium side, and one transfer right is restored on the primary recording medium side. It becomes.

  Such check-out / check-in management is performed by detecting “ON” and “OFF” of a content ID flag or a count of the number of transfers for each content data. At the time of checkout, the content data and content ID are recorded on the secondary recording medium (memory card 7) side, and it is detected that the flag is “ON”. Data can be played back (obtains playback rights). In the primary recording medium, it is assumed that one content ID has been transferred, and the transfer right by UsageRule is decreased by one (count of the flag is decreased). Also, at the time of check-in, the content data is not actually returned and transferred, the content data is erased on the secondary recording medium, and the content ID is returned on the primary recording medium side. Increase by one (increase flag count). The reproduction right is lost on the secondary recording medium side.

  As a result, when recording from the CD player to the mobile phone 1, primary recording is performed, writing to the built-in memory 106 is permitted, and content once stored in an external storage device such as a hard disk of a personal computer is stored in the mobile phone 1. When recording, secondary recording is performed. When secondary recording is prohibited, writing to the built-in memory 106 is prohibited.

  If the content input from the external device interface 101 is primary recording (or secondary recording is permitted) based on the determination by the flag determination unit 105, the key management unit 103 manages the content. Using the self-recording key CK, the self-recording unit 102 encrypts the content and records it in the built-in memory 106.

  The self-recorded content recorded in this way is read from the built-in memory 106 based on a user operation on the operation unit 116, decoded by the reproduction control unit 110, and output by the reproduction unit 112 (display unit 112a and speaker 112b). Is done.

(Distribution content playback function)
The mobile phone 1 also has a function of receiving content recorded from the content server 2 as distribution content, and recording / playing it back. That is, a distribution recording unit 115 is connected to the communication circuit 104, and in the distribution recording unit 115, the flag is determined by the flag determination unit 105, and the recording permitted is written in the built-in memory 106.

  As shown in FIG. 4, the recorded distribution content has a data configuration in which a distribution header portion H1 is added to the codec bitstream portion C1, and the codec bitstream portion C1 is used for content such as music and video. It is a real data part, and the distribution header part H1 is a part to which a content ID, an incoming call setting point, and the like are added.

  This incoming call setting point is data that defines a reproduction start point and an end point when a part of the downloaded distribution content is used as an incoming melody. This incoming call setting point is set by the incoming call setting unit 114 through the operation unit 116. The points set by the incoming call setting unit 114 are written by the header setting unit 113 into the distribution header H1 of the content stored in the built-in memory 106.

  The incoming call setting unit 114 has a function of detecting whether or not the incoming call setting point defined by the content ID flag is set. If the incoming call setting point is prohibited by the flag, the incoming call setting point 114 is set. Do not execute. With this function, for example, when the author of the content refuses viewing from an arbitrary part, such viewing can be prohibited.

  In the case of reproducing the content in which the incoming call setting point is defined as the incoming melody, the content is first read from the built-in memory 106 by the reproduction control unit 110 and the point in the distribution header portion H1 is detected at the time of the incoming call. , Play between playback start point and end point. As a result, only the content portion desired by the user (for example, the intro or rust portion of the music) can be reproduced as the incoming melody.

(Content output function)
Further, the mobile phone 1 has a function of writing the above-described distribution content to the memory card 7 through the external storage writing unit 111. In other words, an output flag determination unit 107 is connected to the built-in memory 106, and a format conversion unit 108 is connected via the flag determination unit 107.

  The flag determination unit 107 is a module that determines the flag of the content ID added to the content, like the flag determination unit 105 described above. As shown in FIG. 4, the format conversion unit 108 is a module that converts the distribution content D1 into a format for external storage. Specifically, the format conversion unit 108 replaces the distribution header portion H1 with the external storage format header portion H2. Perform the replacement process.

  Then, the content D1 whose format has been converted in this way is encrypted by the encryption unit 109 and converted into recording data D3. This encryption is performed using the self-recording key CK managed by the key management unit 103. The encrypted data is written to the memory card 7 through the external storage writing unit 111.

It is explanatory drawing which shows the content delivery system which concerns on embodiment. It is a block diagram which shows the internal structure of the mobile telephone 1 which concerns on embodiment. It is a functional block diagram which shows the function of the mobile telephone 1 which concerns on embodiment. It is explanatory drawing which shows the data structure in the content output function which concerns on embodiment.

Explanation of symbols

  CK Self-recording key, C1 codec bitstream part, D1 delivery content, D2 converted content, D3 recording data, H1 delivery header part, H2 external storage format header part, M1 self-recording content, M2 delivery Content 1 Mobile phone 2 Content server 3 Authentication server 4 Communication network 5 Wireless base station 6 Playback device 7 Memory card 101 External device interface 102 Self-recording unit 103 Key management unit 104 Communication circuit 104a antenna, 105 flag determination unit, 106 built-in memory, 106a RAM, 106b ROM, 107 flag determination unit, 108 format conversion unit, 109 encryption unit, 110 playback control unit, 111 external storage writing unit, 112 playback unit, 112a display Section, 112b speaker, 113 header setting section, 114 incoming call setting section, 116 operation section, 115 distribution recording section, 120 control section, 130 CPU, 150 control line, 160 data line

Claims (4)

A primary storage device serving as a built-in storage device for storing content data;
A detachable external storage device, a secondary storage device for writing content data stored in the primary storage device, and
A key management unit storing a self-recording key for performing encryption processing on the content data;
Content with playback prohibition part definition flag that defines a part that prohibits playback as a ringing melody, write permission / non-write flag that defines whether or not writing to the primary storage device and writing to the secondary storage device is possible A content data capture unit for capturing data;
When the content data is taken in via the content data take-in unit, a primary determination that determines whether or not the content data can be written to the primary storage device based on the writability flag attached to the content data A storage flag determination unit;
A recording unit that writes the content data to the primary storage device when the primary storage flag determination unit determines that the writing of the content data to the primary storage device is permitted;
Of the content data written in the primary storage device, the content data is set when an incoming call setting point indicating a start point and an end point of a portion to be reproduced as a ringing melody is set by the user via the operation unit. By referring to the reproduction prohibition part definition flag attached to, it is determined whether or not the incoming call setting point corresponding to the setting operation is a part where reproduction as a ringing melody is prohibited. Only when it is determined that the incoming call setting point corresponding to the setting operation is not a portion where reproduction as a ringing melody is prohibited, the incoming call setting point corresponding to the setting operation is written to the primary storage device. An incoming call setting part to be written in the header part of the content data,
When the content data written in the primary storage device is played back as an incoming melody, the incoming call setting point written in the header part of the content data is referred to and only the portion corresponding to the incoming call setting point is received. A playback control unit that controls playback as a melody,
When writing the content data stored in the primary storage device to the secondary storage device, the secondary data is based on the write permission flag attached to the content data stored in the primary storage device. A secondary storage flag determination unit that determines whether or not the content data can be written to the storage device;
When the secondary storage flag determination unit determines that writing of the content data to the secondary storage device is permitted, the format of the content data is changed to the format for the secondary storage device. A format conversion unit for conversion processing;
An encryption unit that performs an encryption process based on the self-recording key read from the key management unit with respect to the content data that has been subjected to the format conversion process by the format conversion unit;
An external storage writing unit for writing the content data subjected to the encryption processing by the encryption unit to the secondary storage device;
A mobile terminal device. A communication unit that receives the content data distributed via a communication network and / or an external device interface for capturing the content data output from the external device
The mobile terminal device according to claim 1 . A reproduction prohibition part definition flag in which the content data capturing unit defines a part that prohibits reproduction as an incoming melody, whether or not data can be written to a primary storage device serving as a built-in storage device, and a removable external storage device A content data fetching step for fetching content data with a write enable / disable flag defining whether or not to write to the secondary storage device for writing content data stored in the primary storage device;
  When the content data is fetched in the content data fetching step, the primary storage flag determination unit determines whether the content data is stored in the primary storage device based on the writability flag attached to the content data. A primary storage flag determination step for determining whether or not writing is possible;
  When the primary storage flag determining step determines that the writing of the content data to the primary storage device is permitted, the recording unit writes the content data to the primary storage device; and
  Of the content data written in the primary storage device, when an incoming call setting point indicating a start point and an end point of a portion to be reproduced as a ringing melody is set by the user via the operation unit, an incoming call setting unit However, by referring to the reproduction prohibition part definition flag attached to the content data, whether or not the incoming call setting point corresponding to the setting operation is a part where reproduction as a ringing melody is prohibited. Only when it is determined that the incoming call setting point corresponding to the setting operation is not a portion where reproduction as a ringing melody is prohibited, the incoming call setting point corresponding to the setting operation is changed to the primary operation. An incoming call setting step for writing in the header portion of the content data written in the storage device;
  When the content data written in the primary storage device is played back as an incoming melody, the playback control unit refers to the incoming call setting point written in the header part of the content data and corresponds to this incoming call setting point. A playback control step for controlling playback of only the part to be played as a ringtone,
  When the content data stored in the primary storage device is written to the secondary storage device, the secondary storage flag determination unit adds the content data stored in the primary storage device to the content data. A secondary storage flag determination step for determining whether the content data can be written to the secondary storage device based on the availability flag;
  When it is determined in the secondary storage flag determination step that the writing of the content data to the secondary storage device is permitted, the format conversion unit converts the format of the content data into the secondary storage. A format conversion step for converting into a format for the device;
  The encryption unit reads the self-recording key from the key management unit in which the self-recording key for performing encryption processing on the content data is stored, and the format conversion process is performed in the format conversion step. An encryption step for performing encryption processing on the content data based on the read self-recording key;
  An external storage writing unit, wherein the external storage writing unit writes the content data subjected to the encryption process in the encryption step to the secondary storage device;
  A content recording method comprising: The content data capturing step includes
A delivery content fetching step for fetching the content data distributed via the communication network via the communication unit; and / or an interface fetching step for fetching the content data output from the external device via the external device interface.
The content recording method according to claim 3 .