摘要:
The invention concerns a method for assigning parts of multimedia files to distributed storage devices, the number of said devices being an integer n, characterized in that it comprises the following steps: a step consisting in dividing each multimedia file in windows, which represent data for contiguous playback of a given duration; a step consisting, for each multimedia file, in determining a number k so that any original window of file can be recovered from any k distinct symbols; a step consisting, for each window of each said multimedia files, in assigning n corresponding symbols to said devices, one to each device, the n distinct symbols being created using erasure coding; and a step consisting in partially or totally filling the storage memory left on each device after said first steps with prefix windows of said multimedia files.
摘要:
The invention concerns a method for assigning parts of multimedia files to distributed storage devices, the number of said devices being an integer n, characterized in that it comprises the following steps: a step consisting in dividing each multimedia file in windows, which represent data for contiguous playback of a given duration; a step consisting, for each multimedia file, in determining a number k so that any original window of file can be recovered from any k distinct symbols; a step consisting, for each window of each said multimedia files, in assigning n corresponding symbols to said devices, one to each device, the n distinct symbols being created using erasure coding; and a step consisting in partially or totally filling the storage memory left on each device after said first steps with prefix windows of said multimedia files.
摘要:
A control server is intended for controlling content distribution to peers coupled to a communication network which comprises at least one content serving means (CNS, N1-N3) storing contents. This control server is arranged i) for transmitting messages to these peers to inform them that a content will soon be distributed by means of an identified multicast session, and to identify content parts that have been respectively associated to them, and ii) for ordering at least one content serving means to initiate this identified multicast session to transmit the content to the peers, in order those having decided to listen to the multicast session store the content parts that have been identified into their respective messages.
摘要:
The present invention relates to a method for the distribution of multimedia content, comprising: a first step comprising a download in “push” mode of a multimedia content, in a partial way, from a content server to a client device, and a second step comprising a download of the missing elements of said multimedia content in “pull” mode via a “peer to peer” mechanism from a second client device, and in that the multimedia content can be reconstituted with n+p blocks, n and p being non-null natural integers, n blocks being downloaded during said first step and p blocks being downloaded during the second step, the multimedia content being exploitable only after reception of n+p blocks.
摘要:
The present invention relates to a method for the distribution of multimedia content, comprising:a first step comprising a download in “push” mode of a multimedia content, in a partial way, from a content server to a client device, anda second step comprising a download of the missing elements of said multimedia content in “pull” mode via a “peer to peer” mechanism from a second client device,and in that the multimedia content can be reconstituted with n+p blocks, n and p being non-null natural integers, n blocks being downloaded during said first step and p blocks being downloaded during the second step, the multimedia content being exploitable only after reception of n+p blocks.
摘要:
A method is intended for disseminating content data in a peer-to-peer mode between peers connected to at least one communication network. This method comprises the steps of: i) making peers exchange neighboring information between them to build a bipartite peer overlay comprising a first group, comprising peers having a complete content to be disseminated, and a second group, comprising peers having not this content or only a part of it and having links therebetween, ii) disseminating the data defining the content (and preferably encoded with erasure correcting codes) from peers of the first group to first peers of the second group according to the bipartite peer overlay, iii) disseminating the data received by the first peers to other peers of the second group according to the bipartite peer overlay, and iv) updating the bipartite peer overlay when a peer of the second group has fully completed the content.
摘要:
A method and apparatus are described for protecting real time media including receiving media packets, generating media bit strings from the media packets, applying a forward error correcting code across the generated media bit strings to generate at least one forward error correcting bit string and generating at least one forward error correcting packet from the at least one forward error correcting bit string. Also described are a method and apparatus for recovering from losses of real time media packets including forming media bit strings from received media packets, forming forward error correcting bit strings from received forward error correcting packets, decoding the formed media bit strings and forward error correcting bit strings to obtain recovered media bit strings and recover lost media packets from the recovered media bit strings. Further described is a data structure for a forward error correcting header on computer readable media.
摘要:
In a method and an apparatus for navigating through subtitles of an Audio Video data stream an address information of one or more played back data units is stored together with the subtitle information of said played back data units during play back of said data units. One or more of said stored subtitle information can be displayed. Following the selection of one of said displayed subtitle information the stored address information of the data unit corresponding to the selected subtitle information is retrieved and the corresponding data unit is accessed using said retrieved address information. Playing back the accessed data unit conveniently allows to watch and listen to a scene including subtitles again, e.g. by a few clicks on the remote control.
摘要:
The present invention relates to a module and a process for inter-user communication across a bidirectional network. The module comprises a unit for triggering recording, in a storage space of a server, of information received by the server from users via the bidirectional network, and a unit for controlling a broadcasting of data stored in the storage space to the users, via a broadcasting network. It also comprises a unit for monitoring connection of the users to the server via the bidirectional network. Moreover, the unit for triggering recording and/or the unit for controlling broadcasting is designed to operate as a function of the users connected to the server which are identified by the monitoring unit. Advantageously, the bidirectional network is temporary and the broadcasting network is a permanent unidirectional network. Applications to P2P technology, in particular for television.
摘要:
The present invention concerns a method of transferring content from a first communication device to a second communication device in a communication network, comprising the following steps: defining a first probability, according to which a content can be encoded; defining a second probability, according to which a content can be chosen; upon request of content from said second communication device to said first communication device: encoding content with another content according to said first probability, said content being chosen with said second probability, and transferring content z=x XOR y from said first communication device to said second communication device, or according to probability 1−pe transferring unencoded content x from said first communication device to said second communication device.
摘要翻译:本发明涉及将内容从第一通信设备传送到通信网络中的第二通信设备的方法,包括以下步骤:定义第一概率,根据该第一概率对内容进行编码; 定义第二概率,据此可以选择内容; 根据从所述第二通信设备到所述第一通信设备的内容的请求:根据所述第一概率对具有另一内容的内容进行编码,所述内容以所述第二概率被选择,并且将内容z = x XOR y从所述第一通信设备传送到所述第一通信设备 或者根据概率1-pe将未编码内容x从所述第一通信设备传送到所述第二通信设备。