Abstract: An information processing apparatus includes a display, an object manager, and an object controller. The display displays an object. The object manager manages the owner attribute of the object. The object controller controls the display priority of the object on the display on the basis of the owner attribute of the object.

Abstract: A distribution server (300) periodically distributes, during a live distribution of a content, MPDs of the contents to a client device (100). The distribution server (300) includes a metadata generating section (320) for generating an XML file containing URLs of media segments (MS) belonging to past Periods. The metadata generating section (320) also generates MPDs.

Abstract: A server (2) includes an index information generator (24) and an encoder (23). When a plurality of items of segment data (27) have been encoded up to predetermined sub segment data, the index information generator (24) generates index information (28) used for switching content, which serves as a playback subject, at this sub segment data. The encoder (23) causes a client (1) to obtain the index information (28) generated by the index information generator (24).

Abstract: A control information decoding section (102) decodes sets of control information contained in a stream. Further, a random access information analyzing section (101) carries out analysis of locations of random access points of media items contained in the stream, on the basis of the sets of control information. Still further, a management information generating section (103) generates management information for managing a plurality of random access points contained in the stream, on the basis of decoded versions of the sets of control information, which has been obtained by the control information decoding section (102), and the locations of the random access points obtained by the analysis performed by the random access information analyzing section (101). Then, the management information thus generated and the stream are recorded onto a storage medium (104).

Abstract: A content distributing device in the present invention receives a request message to request to transmit content. Then, in a case where a device transmitted the request message is a relaying device for receiving the content thus requested and possessing and transferring the content to another device, the content distributing device transmits the content thus requested to the relaying device, or, in a case where a device transmitted the request message is a content playing device for playing the content thus requested, the content distributing device transmits, to the content playing device, an instruction to acquire the content from a relaying device which has transmitted before the content thus requested.

Abstract: A proxy (250) includes (i) a processing section (251) for transmitting information when the proxy detects a video request from a proxy (200), information indicating that the proxy can transmit a certain video by multicast in replacement of a server (300), and (ii) a processing section (253) for registering the proxy (250) in a multicast group when a JOIN message is received from the proxy (200). The processing section (253) relays a video in cache (252) to registered proxies via multicast.

Abstract: Provided are a data transmission device, a method for transmitting data, an audio-video environment control device, a method for controlling audio-visual environment, an audio-video environment control system, wherein peripheral devices can be appropriately controlled in accordance with the layout of the peripheral devices in an actual audio-visual environment so that a high realistic sensation is obtained. A data reception device (20) receives a predetermined video data and/or audio data, identification information indicative of an arrangement pattern of peripheral devices (lighting devices) arranged in a virtual audio-visual environment space, lighting control data corresponding to the peripheral devices arranged in the virtual audio-visual environment space.

Abstract: Provided are a data transmission device, a data reception device, a method for transmitting data, a method for receiving data, and a method for controlling audio-visual environment that carry out the control of peripheral devices in consistence with contents producer's intention, thereby realizing the listening/viewing of the contents with a realistic sensation. The data transmission device is comprised of a video coding unit (101), an audio coding unit (102), an audio-visual environment control data coding unit (103), an audio-visual environment control data input unit (104), a data multiplexing unit (105) and a transmission unit (106).

Abstract: A control information decoding section (102) decodes sets of control information contained in a stream. Further, a random access information analyzing section (101) carries out analysis of locations of random access points of media items contained in the stream, on the basis of the sets of control information. Still further, a management information generating section (103) generates management information for managing a plurality of random access points contained in the stream, on the basis of decoded versions of the sets of control information, which has been obtained by the control information decoding section (102), and the locations of the random access points obtained by the analysis performed by the random access information analyzing section (101). Then, the management information thus generated and the stream are recorded onto a storage medium (104).