摘要:
A content transmission system transmits content, using a cloud computing system. A recording device records the content to a local storage or a cloud storage. When the local storage is selected as a recording destination, the recording device generates an encryption key, encrypts the content with the key, and generates management information associating the key with an address of the cloud storage. The recording device furthermore determines whether a portable recording medium is connected thereto. If connected, the recording device records the key and the management information to the portable recording medium. The terminal device first reads the key and the management information from the portable recording medium. The terminal device then accesses the cloud storage without performing user authentication, referring to the management information, and downloads the encrypted content from the cloud storage. Furthermore, the terminal device decrypts the content from the encrypted content, using the key.
摘要:
The present invention has an objective of realizing compatibility of an optical disk having a high resolution video signal recorded thereon and a system for reproducing the optical disk, with a conventional system for producing a standard resolution video signal. A high resolution video signal is divided by video division means into a main signal and a sub signal, and the main signal and the sub signal are MPEG-encoded. The stream of the main signal and the stream of the sub signal are divided into 1 GOP or more of frames. First interleave blocks 54 each including 1 GOP or more of the stream of the main signal and second interleave blocks 55 each including 1 GOP or more of the stream of the sub signal are recorded on an optical disk 1. A high resolution reproduction apparatus reproduces both the first and second interleave blocks to obtain a high resolution video output. A non-high quality picture reproduction apparatus reproduces only the first or second interleave blocks to obtain a standard resolution video output.
摘要:
A data processing device capable of writing and/or reading program data to/from a plurality of types of recording medium includes: a reception section for receiving a signal relating to program data; a judgment section for identifying the type of the recording medium mounted; a recording processing section for recording the program data obtained from the signal via stream recording process performing neither decoding or encoding, or the encode recording process performing at least encoding of the program data, onto the recording medium; a selection section for selecting the stream recording process or the encode recording process according to the type of the recording medium; a calculation section for selecting a first remaining amount calculation process based on the remaining amount of the recording medium and the program data transmission rate or a second remaining amount calculation process based on the encoding rate and calculating the remaining time usable for performing recording onto the recording medium by the selected calculation process; and a display section for displaying the remaining time.