Monitoring camera system, imaging device, and video display device

• US 7,792,295 B2
• Filed: 04/20/2006
• Issued: 09/07/2010
• Est. Priority Date: 04/25/2005
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Watanabe, Kazuhisa, Ohmori, Motoji, Yokota, Kaoru, Sakakibara, Mizuho, Saso, Atsushi, Yamamoto, Naoaki
• Primary Examiner(s): CERVETTI, DAVID GARCIA
• Application Number:
  US11/909,882
• Publication Number:
  US 20090257589A1
• Time in Patent Office: 1,601 Days
• Field of Search: 380/200, 380/210, 380/216, 380/277
• US Class Current: 380/210
• CPC Class Codes: H04N 21/2187 Live feed
• CPC Class Codes: H04N 21/2347 involving video stream encryption
• CPC Class Codes: H04N 21/835 Generation of protective data, e.g. certificates protecting software against unauthorised usage in a vending or licensing environment G06F21/10
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Abstract

This relates to an imaging device in which the necessary monitoring of an individual can be realized, while still maintaining protection of an individual'"'"'s privacy. The imaging device includes an encryption key storage unit in which encryption key data is stored for an individual, an object judging unit operable to judge whether or not the captured video is of the individual, and a limited-capture video generation unit operable to (i) convert a part of the captured video that includes the individual into encrypted video, (ii) generate limited-capture video, which includes the encrypted video, when said object judging unit judges that the captured video includes the individual, and (iii) output the captured video, which does not include the encrypted video, when said object judging unit judges that the captured video does not include the individual.

Claims

1. A monitoring camera system comprising an imaging device which captures video and distributes captured video, and a video display device which receives and displays the captured video,

wherein said imaging device includes:

a capturing unit operable to capture video;

an encryption key storage unit in which encryption key data is stored for at least one individual, the encryption key data being associated with a video display device that is permitted to display captured video that includes video of the at least one individual;

an object judging unit operable to judge whether or not the captured video includes video of the at least one individual associated with the video display device;

a limited-capture video generation unit operable to (i) convert at least a part of the captured video that includes video of the at least one individual into encrypted video, by encrypting the part of the captured video that includes video of the at least one individual using the encryption key data, which is associated with the video display device and is stored for the at least one individual, (ii) generate limited-capture video, which includes the encrypted video, when said object judging unit judges that the captured video includes video of the at least one individual, and (iii) output the captured video, when said object judging unit judges that the captured video does not include video of the at least one individual; and

a video distribution unit operable to distribute one of the limited-capture video and the captured video to said video display device, the limited-capture video being generated by said limited-capture video generation unit and the captured video being outputted by said limited-captured video generation unit, and

said video display device includes;

a reception unit operable to receive one of the limited-capture video and the captured video;

a decryption key storage unit operable to store decryption key data which is associated with said video display device; and

a video decryption unit operable to generate decrypted video by decrypting the encrypted video included in the limited-capture video using the decryption key data.

2. An imaging device which captures video and distributes captured video, comprising:

a capturing unit operable to capture video;

an encryption key storage unit in which encryption key data is stored for at least one individual, the encryption key data being associated with a video display device that is permitted to display captured video that includes video of the at least one individual;

an object judging unit operable to judge whether or not the captured video includes video of the at least one individual associated with the video display device;

a limited-capture video generation unit operable to (i) convert at least a part of the captured video that includes video of the at least one individual into encrypted video, by encrypting the part of the captured video that includes video of the at least one individual using the encryption key data, which is associated with the video display device and is stored for the at least one individual, (ii) generate limited-capture video, which includes the encrypted video, when said object judging unit judges that the captured video includes video of the at least one individual, and (iii) output the captured video, when said object judging unit judges that the captured video does not include video of the at least one individual; and

a video distribution unit operable to distribute one of the limited-capture video and the captured video to the video display device, the limited-capture video being generated by said limited-capture video generation unit and the captured video being outputted by said limited-capture video generation unit.

3. The imaging device according to claim 2, further comprising a radio signal reception unit operable to receive a radio signal emitted from an identification (ID) tag attached to the at least one individual,

wherein video display device designation information and the encryption key data are stored, for the at least one individual, in association with each other, in said encryption key storage unit, the video display device designation information designating the video display device that is permitted to display the captured video that includes video of the at least one individual, and

said object judging unit is operable to judge whether or not the captured video includes video of the at least one individual depending on whether or not an identification code included in the radio signal received by said radio signal reception unit matches the video display device designation information stored by said encryption key storage unit.

4. The imaging device according to claim 2,

wherein the encrypted key data, which is associated with the video display device and is stored for the at least one individual, and the decryption key data held by the video display device are common key data.

5. The imaging device according to claim 2,

wherein said limited-capture video generation unit includes:

a key generation unit operable to generate video encryption key data;

a captured video encryption unit operable to convert at least a part of the captured video that includes video of the at least one individual into the encrypted video by encrypting the part of the captured video that includes video of the at least one individual using the video encryption key data generated by said key generation unit, when said object judging unit judges that the part of the captured video includes video of the at least one individual;

a video key encryption unit operable to convert the video encryption key data generated by said key generation unit into encrypted video encryption key data by encrypting the video encryption key data using the encryption key data, which is associated with the video display device and is stored for the at least one individual; and

a generation unit operable to generate the limited-capture video that includes the encrypted video generated by said video encryption unit and the encrypted video encryption key data generated by said video encryption unit.

6. The imaging device according to claim 2,

wherein the limited-capture video generation unit includes:

a conversion unit operable to convert specific object video, which is video of the at least one individual in the captured video, into encrypted specific object video by encrypting the specific object video using the encryption key data, which is associated with the video display device and is stored for the at least one individual, when said object judging unit judges that the captured video includes video of the at least one individual;

a background video generation unit operable to generate background video in which the specific object video is removed from the captured video, when said object judging unit judges that the captured video includes video of the at least one individual; and

a generation unit operable to generate the limited-capture video that includes the encrypted specific object video generated by said conversion unit and the background video generated by said background video generation unit.

7. The imaging device according to claim 6, further comprising:

a background video storage unit operable to store background video captured beforehand in a situation where the captured video does not include video of the at least one individual,

wherein said background video generation unit is operable to read out the background video from said background video storage unit, when said object judging unit judges that the captured video includes video of the at least one individual.

8. The imaging device according to claim 6, further comprising:

a background video storage unit operable to store background video generated by synthesizing a plurality of videos in which the specific object video is removed from the captured video,

wherein said background video generation unit is operable to read out the background video from said background video storage unit, when said object judging unit judges that the captured video includes video of the at least one individual.

9. The imaging device according to claim 6, further comprising a face image storage unit in which face image data of the at least one individual is stored,

wherein said conversion unit includes:

an extraction unit operable to read out, from said face image storage unit, the face image data associated with the at least one individual, and to extract the specific object video by searching the read out face image data in the captured video; and

a video conversion unit operable to convert the specific object video extracted by said extraction unit into the encrypted specific object video by encrypting the specific object video using the encryption key data, which is associated with the video display device and is stored for the at least one individual.

10. A distribution device which distributes, to a video display device, captured video captured by an imaging device, said distribution device comprising:

an encryption key storage unit in which encryption key data is stored for at least one individual, the encryption key data being associated with the video display device that is permitted to display captured video that includes video of the at least one individual;

an object judging unit operable to judge whether or not the captured video includes video of the at least one individual associated with the video display device;

a limited-capture video generation unit operable to (i) convert at least a part of the captured video that includes video of the at least one individual into encrypted video, by encrypting the part of the captured video that includes video of the at least one individual using the encryption key data, which is associated with the video display device and is stored for the at least one individual, (ii) generate limited-capture video, including the encrypted video, when said object judging unit judges that the captured video includes video of the at least one individual, and (iii) output the captured video, when said object judging unit judges that the captured video does not include video of the at least one individual; and

a video distribution unit operable to distribute one of the limited-capture video and the captured video to the video display device, the limited-capture video being generated by said limited-capture video generation unit, and the captured video being outputted by said limited-capture video generated unit.

11. The distribution device according to claim 10,

wherein the limited-capture video generation unit includes:

a conversion unit operable to convert the specific object video, which is video of the at least one individual in the captured video, into encrypted specific object video by encrypting the specific object video using the encryption key data, which is associated with the video display device and is stored for the at least one individual, when said object judging unit judges that the captured video includes video of the at least one individual;

a background video generation unit operable to generate background video in which the specific object video is removed from the captured video, when said object judging unit judges that the captured video includes video of the at least one individual; and

a generation unit operable to generate the limited-capture video that includes the encrypted specific object video generated by said conversion unit and the background video generated by said background video generation unit.

12. The distribution device according to claim 11, further comprising:

a background video storage unit operable to store background video captured beforehand in a situation where the captured video does not include video of the at least one individual,

wherein said background video generation unit is operable to read out the background video from said background video storage unit, when said object judging unit judges that the captured video includes video of the at least one individual.

13. The distribution device according to claim 11, further comprising:

a background video storage unit operable to store background video generated by synthesizing a plurality of videos in which the specific object video is removed from the captured video,

wherein said background video generation unit is operable to read out the background video from the background video storage unit, when said object judging unit judges that the captured video includes video of the at least one individual.

14. A distribution method for use in a distribution device which distributes, to a video display device, captured video captured by an imaging device,

wherein encryption key data is stored for at least one individual in the distribution device, the encryption key data being associated with the video display device that is permitted to display captured video that includes video of the at least one individual,

said method comprising:

an object judging step of judging whether or not the captured video includes video of the at least one individual associated with the video display device;

a limited-capture video generating step of (i) converting at least a part of the captured video that includes video of the at least one individual into encrypted video by encrypting the part that includes video of the at least one individual using the encryption key data, which is associated with the video display device and is stored for the at least one individual, (ii) generating limited-capture video, including the encrypted video, when it is judged in said object judging step that the captured video includes video of the at least one individual, and (iii) outputting the captured video, when it is judged in said object judging step that the captured video does not include video of the at least one individual; and

a video distributing step of distributing one of the limited-capture video and the captured video to the video display device, the limited-capture video being generated in said limited-capture video generated step, and the captured video being outputted in said limited-capture video generating step.

15. A program recorded on a non-transitory computer-readable storage medium, which is used in a distribution device which distributes, to a video display device, captured video captured by an imaging device,

wherein encryption key data is stored for at least one individual in the distribution device, the encryption key data being associated with the video display device that is permitted to display captured video that includes video of the at least one individual,

said program causes a computer to execute:

an object judging step of judging whether or not the captured video includes video of the at least one individual associated with the video display device;

a limited-capture video generating step of (i) converting at least a part of the captured video that includes video of the at least one individual into encrypted video by encrypting the part that includes video of the at least one individual using the encryption key data, which is associated with the video display device and is stored for the at least one individual, (ii) generating limited-capture video, including the encrypted video, when it is judged in said object judging step that the captured video includes video of the at least one individual, and (iii) outputting the captured video, when it is judged in said object judging step that the captured video does not include video of the at least one individual; and

a video distributing step of distributing one of the limited-capture video and the captured video to the video display device, the limited-capture video being generated in said limited-capture video generated step, and the captured video being outputted in said limited-capture video generating step.

16. An integrated circuit for distributing, to a video display device, captured video captured by an imaging device, said integrated circuit comprising:

an encryption key storage unit in which encryption key data is stored for at least one individual, the encryption key data being associated with the video display device that is permitted to display captured video that includes video of the at least one individual;

an object judging unit operable to judge whether or not the captured video includes video of the at least one individual associated with the video display device;

a limited-capture video generation unit operable to (i) convert at least a part of the captured video that includes video of the at least one individual into encrypted video, by encrypting the part of the captured video that includes video of the at least one individual using the encryption key data, which is associated with the video display device and is stored for the at least one individual, (ii) generate limited-capture video, including the encrypted video, when said object judging unit judges that the captured video includes video of the at least one individual, and (iii) output the captured video, when said object judging unit judges that the captured video does not include video of the at least one individual; and

a video distribution unit operable to distribute one of the limited-capture video and the captured video to the video display device, the limited-capture video being generated by said limited-capture video generation unit, and the captured video being outputted by said limited-capture video generated unit.