VIDEO IMAGE INFORMATION PLAYBACK METHOD AND VIDEO IMAGE INFORMATION PLAYBACK DEVICE
First Claim
1. A video image information playback method for causing a video image information playback device to playing back a recording medium, the video image information playback device comprising a playback unit for playing back the recording medium on which virtual-machine-based content is recorded, enabling video playback to be controlled by a program running on a virtual machine, and a playback control unit for controlling execution of the program running on the virtual machine and playback processing in the playback, wherein:
- in normal playback of the virtual-machine-based content, a decryption support program, which is one of the plurality of programs running on the virtual machine, receives a numeric value from a decryption program for decrypting encrypted virtual-machine-based content;
the decryption support program executes a prescribed computation by using the numeric value;
the decryption program executes a decryption process by using a result of the computation; and
at the start of resume playback, which is executed following an instruction to resume playback after playback of the virtual-machine-based content is suspended, a proxy program for carrying out a computational process equivalent to the decryption support program in place of the decryption support program that runs on the virtual machine in the playback control unit, and the video playback of the virtual-machine-based content is executed as the proxy program exchanges data with the decryption program.
1 Assignment
0 Petitions
Accused Products
Abstract
A video image information playback method and a video image information playback device with which user convenience can be obtained at the start of resume playback. The video image information playback method is a method of playback of a recording medium on which virtual-machine-based content has been recorded. During normal playback of the virtual-machine-based content, a program running on a virtual machine and a decryption program that decrypts encrypted virtual-machine-based content perform decryption processing for the virtual-machine-based content while exchanging data. After suspension of playback of the virtual-machine-based content, at the start of resume playback, which is executed following an instruction to resume playback, a proxy program is launched in place of the program that runs on the virtual machine. The proxy program and the decryption program perform playback of the video image of the virtual-machine-based content while exchanging data.
-
Citations
6 Claims
-
1. A video image information playback method for causing a video image information playback device to playing back a recording medium, the video image information playback device comprising a playback unit for playing back the recording medium on which virtual-machine-based content is recorded, enabling video playback to be controlled by a program running on a virtual machine, and a playback control unit for controlling execution of the program running on the virtual machine and playback processing in the playback, wherein:
-
in normal playback of the virtual-machine-based content, a decryption support program, which is one of the plurality of programs running on the virtual machine, receives a numeric value from a decryption program for decrypting encrypted virtual-machine-based content; the decryption support program executes a prescribed computation by using the numeric value; the decryption program executes a decryption process by using a result of the computation; and at the start of resume playback, which is executed following an instruction to resume playback after playback of the virtual-machine-based content is suspended, a proxy program for carrying out a computational process equivalent to the decryption support program in place of the decryption support program that runs on the virtual machine in the playback control unit, and the video playback of the virtual-machine-based content is executed as the proxy program exchanges data with the decryption program. - View Dependent Claims (2, 3)
-
-
4. A video image information playback device, comprising:
-
a playback unit for playing back a recording medium on which virtual-machine-based content is recorded, enabling video playback to be controlled by a program running on a virtual machine; and a playback control unit for controlling execution of the program running on the virtual machine and playback processing in the playback unit, wherein; in normal playback of the virtual-machine-based content, a decryption process for the virtual-machine-based content is executed by a decryption support program running on the virtual machine in the playback control unit and a decryption program for decrypting the encrypted virtual-machine-based content running on a decryption control unit in the playback unit; and at the start of resume playback, which is executed following an instruction to resume playback after playback of the virtual-machine-based content is suspended, a proxy program for carrying out a computational process equivalent to the decryption support program in place of the decryption support program that runs on the virtual machine in the playback control unit, and the video playback of the virtual-machine-based content is executed as the proxy program exchanges data with the decryption program. - View Dependent Claims (5, 6)
-
Specification