Abstract: Techniques and mechanisms described herein facilitate the efficient common storage of partially encrypted content. According to various embodiments, a client device to transmit a designated representation of a media content item via a communications interface may be received. The media content item may be associated with a plurality of representations including the designated representation. The media content item may be associated with first media content data and second media content data. The first media content data may be shared among the plurality of representations. The second media content data may be specific to the designated representation. The first media content data may be combined with the second media content data to create a designated partially encrypted media content portion associated with the designated representation via a processor. The designated partially encrypted media content portion may be transmitted to the client device via the communications interface.

Abstract: An electronic device with one or more processors, memory and a display obtains information that enables distribution of content between clients operating as peers in a peer-to-peer network. A first subset of the clients have first file format processing capabilities and a second subset of the clients have second file format processing capabilities. The peer-to-peer network enables access to a first set of file portions corresponding to the first file format and a second set of file portions corresponding to the second file format. The first set of file portions and the second set of file portions both include one or more shared file portions. The device provides, to one or more clients, information that enables the respective content to be shared over the peer-to-peer network that enables shared file portions be obtained either clients in the first subset of clients or clients in the second subset of clients.

Abstract: The present invention relates to a method of, and device for, arranging a P2P network comprising a streaming source and network peers arranged at distribution levels in the P2P network, in which P2P network the streaming source is arranged to divide data content to be streamed into a plurality of content sub-streams together forming the data content and to distribute the plurality of content sub-streams to the network peers. The method comprises instructing a network peer requesting to download data content to download a single content sub-stream from a respective one of selected network peers being arranged at a distribution level closer to the streaming source than the requesting network peer until a number of content sub-streams have been downloaded by the requesting network peer from which the requested data content can be formed. The present invention further relates to a method of requesting data content in a P2P network and a peer device.

Abstract: An invented medium delivery apparatus includes a delivery unit, a medium stacking unit, a detection unit, and a sensor. The delivery unit delivers a conveyed medium. The medium stacking unit stacks the medium delivered from the delivery unit. The detection unit is disposed between the delivery unit and the medium stacking unit in a medium conveyance direction, and detects an amount of the medium delivered to the medium stacking unit. The sensor senses a motion of the detection unit. The detection unit has a detachable tip portion. The medium delivery apparatus is able to change the sheet number of media stacked on the medium stacking unit where the medium stacking unit is in a full status with the stacked media.

Abstract: An information processing apparatus having an input configured to receive a first operation and a second operation input by a user, a playback unit configured to obtain predetermined data and play back the data based on the operation input by the user from the input; and a display control unit configured to control, in correspondence with a virtual hierarchical structure for classifying the predetermined data, a display of a display screen indicating each hierarchy level, and for controlling a display of a predetermined mark in the display screen. The display control unit also controls the display of the predetermined mark corresponding to the predetermined data which is played back by the playback unit in a manner different from other non-selected marks while the predetermined mark is being selected.

Abstract: A disk reproducing apparatus capable of reproducing data that is recorded on a DVD-Audio, includes a data reproducing unit which reproduces the data, a displaying unit, and a controlling unit which controls the data reproducing unit and the displaying unit. Preferably, the controlling unit, in reproducing a group of data, causes the data reproducing unit to reproduce in seriatim respective data in subgroups, after data in each subgroup is reproduced, decides whether the subgroup is a last subgroup in the group, if the subgroup is the last subgroup, decides whether a menu display forced is indicated, if the menu display forced is indicated, forms and displays a menu screen based on menu data in management data, if the menu display forced is not indicated, decides whether the menu data is present, and if the menu data is present, forms and displays the menu screen based on the menu data.

Abstract: A method of protecting media files includes dividing a media file into segments. Each segment is encrypted multiple times with a different encryption key each time. Downloads of the segments are controlled such that different combinations of segments and keys are downloaded. Key bundles are provided to user devices, with each key bundle is a combination of keys only for that user device combination of segments and keys.

Abstract: When a disk tray stops beyond or before a predetermined rotational position, there has heretofore been a likelihood of the disk tray being unable to be inhibited its rotation. As an arm portion 261b is displaced counterclockwise, a shaft portion 262b of a rotary stopper 262 moves toward an engaging groove 223, so that a sharp portion 262a1 is inserted into the engaging groove 223. At this time, slant faces formed on both sides of the tip of the sharp portion are guided along slant faces of the engaging groove 223 and are inserted to an inner part of the engaging groove. Thus, even when a rotary tray 220 stops at a position deviated from the predetermined rotational position, it is possible to surely inhibit the rotation of the rotary tray 220.

Abstract: An annular disc holder is provided for holding a plurality of discs. The disc holder is rotatably mounted on a base and is guided by a guiding device provided between the disc holder and the base so as to be rotated about an axis.

Abstract: A disk recording/reproducing apparatus including a housing for accommodating a plurality of disks in an upright position along a circumference thereof, a disk driving device for recording/reproducing a disk, and a disk conveying belt for conveying the disk between the disk driving device and the housing, wherein the disk driving device is disposed in the center of the housing, thereby reducing the overall size of the apparatus.

Abstract: The invention provides a disk changer which is improved in convenience in use and functionality. The disk changer includes a rotatable tray having a plurality of annularly arranged accommodation portions, a tray rotating mechanism, first and second recording and/or reproduction sections each for recording and/or reproducing an information signal onto and/or from one of the disk-type recording media, and first and second disk takeout mechanisms each for taking out a disk-type recording medium accommodated in an accommodation portion of the rotatable tray and transporting the disk-type recording medium to the corresponding recording and/or reproduction section and for taking out the disk-type recording medium from the corresponding recording and/or reproduction section and transporting the disk-type recording medium to an accommodation portion of the rotatable tray.