IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0161675
(2002-06-05)
|
등록번호 |
US-7426494
(2008-09-16)
|
우선권정보 |
JP-2001-171298(2001-06-06) |
발명자
/ 주소 |
- Ohmori,Motoji
- Futa,Yuichi
- Tatebayashi,Makoto
|
출원인 / 주소 |
- Matsushita Electric Industrial Co., Ltd.
|
대리인 / 주소 |
Wenderoth, Lind & Ponack, L.L.P.
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
7 |
초록
▼
At the time of manufacturing a DVD to be provided to a rental agent, a provider device writes an agent-rental expiry along with contents onto the DVD. At the time of renting the DVD to a user, a rental agent device writes a user-expiry onto the DVD. A DVD player acquires a current time from a time s
At the time of manufacturing a DVD to be provided to a rental agent, a provider device writes an agent-rental expiry along with contents onto the DVD. At the time of renting the DVD to a user, a rental agent device writes a user-expiry onto the DVD. A DVD player acquires a current time from a time source device, and compares the current time with each of a prior time, the agent-rental expiry, and the user-rental expiry. The DVD player plays back the content only when playback conditions are met.
대표청구항
▼
What is claimed is: 1. A playback device for acquiring and playing back a digital work provided from a provider to a rental agent and rented from the rental agent to a user, the rental agent being operable to provide to the user the digital work and a rental agent identifier identifying the rental
What is claimed is: 1. A playback device for acquiring and playing back a digital work provided from a provider to a rental agent and rented from the rental agent to a user, the rental agent being operable to provide to the user the digital work and a rental agent identifier identifying the rental agent, said playback device comprising: a time acquisition unit for acquiring time information including a current time from a time source device; an expiry acquisition unit for acquiring user-expiry information from the rental agent and agent-expiry information from the provider, the user-expiry information including a user expiry time of a period during which the user is permitted by the rental agent to play back the digital work, and the agent-expiry information including a rental expiry time of a period during which the rental agent is permitted by the provider to rent the digital work; a first comparison unit for comparing the current time included in the time information acquired by said time acquisition unit with the user expiry time included in the user-expiry information acquired by said expiry acquisition unit; a second comparison unit for comparing the current time included in the time information acquired by said time acquisition unit with the rental expiry time included in the agent-expiry information acquired by said expiry acquisition unit in response to the current time being not later than the user expiry time; a prohibition unit for prohibiting playback of the digital work in response to the current time included in the time information being later than at least one of the rental expiry time included in the agent-expiry information and the user expiry time included in the user-expiry information; and a rental agent identifier transmission unit for transmitting the rental agent identifier to the provider in response to the current time being later than the rental expiry time. 2. The playback device of claim 1, wherein the rental agent is operable to provide a rental recording medium storing the digital work, the rental agent identifier identifying the rental agent and the user-expiry information to the user wherein: said playback device is operable to acquire the digital work by reading the digital work from the rental recording medium; said expiry acquisition unit is further for acquiring the user-expiry information by reading the user-expiry information from the rental recording medium; said prohibition unit is further for prohibiting playback of the digital work recorded on the rental recording medium; and said rental agent identifier transmission unit is further for transmitting the rental agent identifier acquired from the rental recording medium. 3. The playback device of claim 2, where the provider is operable to provide to the rental agent a provider recording medium storing the digital work, the rental agent identifier identifying the rental agent, and the agent-expiry information: the rental agent is operable to generate the rental recording medium by additionally recording the user-expiry information onto the provider recording medium and provide the generated rental recording medium storing the digital work, the rental agent identifier, the agent-expiry information, and the user-expiry information, and wherein: said expiry acquisition unit is further for acquiring the agent expiry information by reading the agent expiry information from the rental recording medium; said prohibition unit is further for prohibiting playback of the digital work stored on the rental recording medium; and said rental agent identifier transmission unit is further for transmitting the rental agent identifier acquired from the rental recording medium to the provider. 4. The playback device of claim 3, where the provider is operable to provide to the rental agent a provider recording medium storing the digital work, the rental agent identifier identifying the rental agent, and the agent-expiry information; the rental agent is operable to generate the rental recording medium by additionally recording the user-expiry information onto the provider recording medium and provide the generated rental recording medium storing the digital work, the rental agent identifier, the agent-expiry information, and the user-expiry information, wherein: said expiry acquisition unit acquires the agent expiry information by reading the agent-expiry information from the rental recording medium; said prohibition unit prohibits playback of the digital work stored in the rental recording medium; and said rental agent identifier transmission unit transmits the rental agent identifier acquired from the rental recording medium to the provider. 5. The playback device of claim 2, where the provider is operable to provide to the rental agent a provider recording medium storing the digital work, the rental agent identifier identifying the rental agent, and the agent-expiry information; the rental agent is operable to generate the rental recording medium by additionally recording the user-expiry information onto the provider recording medium and provide the generated rental recording medium storing the digital work, the rental agent identifier, the agent-expiry information, and the user-expiry information, wherein: said expiry acquisition means is further for acquiring the agent expiry information by reading the agent expiry information from the rental recording medium; said prohibition means is further for prohibiting playback of the digital work stored on the rental recording medium; and said rental agent identifier transmission means is further for transmitting the rental agent identifier acquired from the rental recording medium to the provider. 6. The playback device of claim 2, wherein the rental agent is operable to provide a rental recording medium storing the digital work, the rental agent identifier identifying the rental agent, and the user-expiry information to the user wherein: said playback device acquires the digital work by reading the digital work from the rental recording medium; said expiry acquisition unit acquires the user-expiry information by reading the user-expiry information from the rental recording medium; said prohibition unit prohibits playback of the digital work recorded in the rental recording medium; and said rental agent identifier transmission unit transmits the rental agent identifier acquired from the rental recording medium. 7. The playback device of claim 1, where the rental agent is operable to provide the digital work to the user along with the user-expiry information by being broadcasted in a form of a broadcast wave and said playback device is operable to acquire the digital work by receiving the broadcast wave, extracting the digital work from the received broadcast wave, and storing the extracted digital work, wherein: said expiry acquisition unit is further for acquiring the user-expiry information by extracting the user-expiry information from the received broadcast wave; and said prohibition unit is further for prohibiting playback of the stored digital work. 8. The playback device of claim 7, where the provider is operable to provide the digital work to the rental agent along with the agent-expiry information and the rental agent is operable to provide the digital work to the user by the rental agent broadcasting the digital work along with the user-expiry information and the agent-expiry information, wherein: said expiry acquisition unit is further for acquiring the agent-expiry information by receiving the broadcast wave and extracting the agent-expiry information from the received broadcast wave; and said prohibition unit is further for prohibiting playback of the stored digital work. 9. The playback device of claim 8, where the provider is operable to provide the digital work to the rental agent along with the agent-expiry information and the rental agent is operable to provide the digital work to the user by the rental agent broadcasting the digital work along with the user-expiry information and the agent-expiry information, wherein: said expiry acquisition unit acquires the agent-expiry information by receiving the broadcast wave and extracting the agent-expiry information form the received broadcast wave; and said prohibition unit prohibits playback of the stored digital work. 10. The playback device of claim 7, where the provider is operable to provide the digital work to the rental agent along with the agent-expiry information and the rental agent is operable to provide the digital work to the user by the rental agent broadcasting the digital work along with the user-expiry information and the agent-expiry information, wherein: said expiry acquisition means is further for acquiring the agent-expiry information by receiving the broadcast wave and extracting the agent-expiry information from the received broadcast wave; and said prohibition means is further for prohibiting playback of the stored digital work. 11. The playback device of claim 7, where the rental agent is operable to provide the digital work to the user along with the user-expiry information by being broadcasted in a form of a broadcast wave and said playback device is operable to acquire the digital work by receiving the broadcast wave, extracting the digital work from the received broadcast wave, and storing the extracted digital work, wherein: said expiry acquisition unit acquires the user-expiry information by extracting the user-expiry information from the received broadcast waves; and said prohibition unit prohibits playback of the stored digital work. 12. The playback device of claim 1, wherein the rental agent is operable to provide a rental recording medium storing the digital work, the rental agent identifier identifying the rental agent, and the user-expiry information to the user, wherein: said playback device is operable to acquire the digital work by reading the digital work from the rental recording medium; said expiry acquisition means is further for acquiring the user-expiry information by reading the user-expiry information from the rental recording medium; said prohibition means is further for prohibiting playback of the digital work recorded on the rental recording medium; and said rental agent identifier transmission means is further for transmitting the rental agent identifier acquired from the rental recording medium. 13. The playback device of claim 1, where the rental agent is operable to provide the digital work to the user along with the user-expiry information by being broadcasted in a form of a broadcast wave and said playback device is operable to acquire the digital work by receiving the broadcast wave, extracting the digital work from the received broadcast wave, and storing the extracted digital work, wherein: said expiry acquisition means is further for acquiring the user-expiry information by extracting the user-expiry information from the received broadcast wave; and said prohibition means is further for prohibiting playback of the stored digital work. 14. A playback method for use by a playback device that acquires and plays back a digital work provided from a provider to a rental agent and rented from the rental agent to a user, the rental agent being operable to provide to the user the digital work and rental agent identifier identifying the rental agent, said playback method comprising: acquiring time information including a current time from a time source device; acquiring user-expiry information from the rental agent and agent-expiry information from the provider, the user-expiry information including a user expiry time of a period during which the user is permitted by the rental agent to play back the digital work, and the agent-expiry information including a rental expiry time of a period during which the rental agent is permitted by the provider to rent the digital work; comparing the current time included in the time information acquired in said acquiring of the time information with the user expiry time shown by the included in information acquired in said acquiring of the user-expiry information; comparing, the current time included in the time information acquired in said acquiring of the time information with the rental expiry time included in the agent-expiry information acquired in said acquiring of the agent-expiry information in response to said comparing of the current time with the user expiry time resulting in a judgment that the current time is not later than the user expiry time; prohibiting playback of the digital work in response to the current time included in the time information being later than at least one of the rental expiry time included in the agent-expiry information and the user expiry time included in the user-expiry information; and transmitting the rental agent identifier to the provider in response to said comparing of the current time with the rental expiry time resulting in a judgment that the current time is later than the rental expiry time. 15. A playback program stored on a computer-readable medium and for use by a computer that acquires and plays back a digital work provided from a provider to a rental agent and rented from the rental agent to a user, the rental agent being operable to provide to the user the digital work and a rental agent identifier identifying the rental agent, said program being operable to cause the computer to execute operations comprising: acquiring time information including a current time from a time source device; acquiring user-expiry information from the rental agent and agent-expiry information from the provider, the user-expiry information including a user expiry time of a period during which the user is permitted by the rental agent to play back the digital work, and the agent-expiry information including a rental expiry time of a period during which the rental agent is permitted by the provider to rent the digital work; comparing the current time included in the time information acquired in said acquiring of the time information with the user expiry time included in the user-expiry information acquired in said acquiring of the user-expiry information; comparing, the current time included in the time information acquired in said acquiring of the time information with the rental expiry time included in the agent-expiry information acquired in said acquiring of the agent-expiry information in response to the comparing of the current time with the user expiry time resulting in a judgment that the current time is not later than the user expiry time; prohibiting playback of the digital work in response to the current time included in the time information being later than at least one of the rental expiry time included in the agent-expiry information and the user expiry time included in the user-expiry information; and transmitting the rental agent identifier to the provider in response to said comparing of the current time with the rental expiry time resulting in a judgment that the current time is later than the rental expiry time. 16. A playback device for acquiring and playing back a digital work provided from a provider to a rental agent and rented from the rental agent to a user, the rental agent being operable to provide to the user the digital work and a rental agent identifier identifying the rental agent, said playback device comprising: a time acquisition means for acquiring time information including a current time from a time source device; an expiry acquisition means for acquiring user-expiry information from the rental agent and agent-expiry information from the provider, the user-expiry information including a user expiry time of a period during which the user is permitted by the rental agent to play back the digital work, and the agent-expiry information including a rental expiry time of a period during which the rental agent is permitted by the provider to rent the digital work; a first comparison means for comparing the current time included in the time information acquired by said time acquisition means with the user expiry time included in the user-expiry information acquired by said expiry acquisition means; a second comparison means for comparing the current time included in the time information acquired by said time acquisition means with the rental expiry time included in the agent-expiry information acquired by said expiry acquisition means in response to the current time being not later than the user expiry time; a prohibition means for prohibiting playback of the digital work in response to the current time included in the time information being later than at least one of the rental expiry time included in the agent-expiry information and the user expiry time included in the user-expiry information; and a rental agent identifier transmission means for transmitting the rental agent identifier to the provider in response to the current time being later than the rental expiry time. 17. A playback device for acquiring and playing back a digital work provided from a provider to a rental agent and rented from the rental agent to a user, the rental agent being operable to provide to the user the digital work and a rental agent identifier identifying the rental agent, said playback device comprising: a time acquisition unit that acquires time information including a current time from a time source device; an expiry acquisition unit that acquires user-expiry information from the rental agent and agent-expiry information from the provider, the user-expiry information including a user expiry time of a period during which the user is permitted by the rental agent to play back the digital work, and the agent-expiry information including a rental expiry time of a period during which the rental agent is permitted by the provider to rent the digital work; a first comparison unit that compares the current time included in the time information acquired by said time acquisition unit with the user expiry time included in the user-expiry information acquired by said expiry acquisition unit; a second comparison unit that compares the current time included in the time information acquired by said time acquisition unit with the rental expiry time included in the agent-expiry information acquired by said expiry acquisition unit in response to the current time being not later than the user expiry time; a prohibition unit that prohibits playback of the digital work in response to the current time included in the time information being later than at least one of the rental expiry time included in the agent-expiry information and the user expiry time included in the user-expiry information; and a rental agent identifier transmission unit that transmits the rental agent identifier to the provider in response to the current time being later than the rental expiry time.
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