Abstract: Upon reception selecting a program to be viewed, upon recording a received program, and upon reproducing a recorded program, as well as at the end of each operation thereof, a master creates viewing information including a corresponding program name, a transmission station name, and a name of a current operating mode thereof, and transmits the created viewing information to the slave via the viewing information management server, and when an option for “viewing an identical program to the master” provided in an input unit for selecting the program to be viewed is selected, a slave receives and displays or receives and records a program having an identical station name to a program that is currently being received and displayed or received and recorded in the master, on the basis of the latest viewing information of the master received from the viewing information management server.

Abstract: A system includes a content server device for performing content distribution in a network; a reception terminal device capable of reproducing a content having a specific format; a plurality of transcoder devices provided in the network, for applying format conversion to a content distributed in the network; and a transcoder management device for searching, in response to a search request sent from the reception terminal device, information on the plurality of transcoder devices, and sending to the reception terminal device, as a search result, a transmission path which runs from the content server device to the reception terminal device via at least one of the plurality of transcoder devices, through which format conversion to a desired content can be performed.

Abstract: An RTP packet generating unit 11 packetizes data into packets, and adds identification information to the header of each of the packets, the identification information identifying each of the packets. An RTP packet encrypting unit 13 divides data included in each of the generated packets into blocks, and encrypts the data included in each of the packets on a block-by-block basis using an encryption key which an encryption key sharing unit 12 shares with a receiving client in such a manner that, when encrypting a first block of the data, the packet encrypting unit encrypts it using the identification information for identifying each of the packets, which is contained, as an initial vector, in the header of each of the packets, and, when encrypting each subsequent block of the data, encrypts it according to an encryption method which uses an immediately-previously-encrypted block.

Abstract: A media delivering apparatus and method for delivering media data via a network to a media receiving apparatus is disclosed. The delivering apparatus includes a parameter acquiring unit which acquires both a communication capability of the network, and the receiving capability of the media receiving apparatus. A media selecting unit selects media data to be delivered based on both the degree of media importance assigned to each media data and at least the one of the communication capability of the network and the receiving capability of the media receiving apparatus. A transmission-data generating unit generates metadata in which both address information about each selected media data and presentation layout information are described. A data transmitting unit delivers the metadata to the media receiving apparatus by way of the network, and a media communication unit delivers the media data in response to a request from the media receiving apparatus.

Abstract: When carrying out reception and video-recording of a plurality of programs, a stream receiving unit (201) of a receiver (200) receives one of the plurality of programs, a recording unit (203) outputs a recording start request and a recording end request to a recording control unit (103) of a video-recording and distribution apparatus (102), a recording control unit (103) records a predetermined program according to the recording start request and the recording end request, and a download receiving unit (205) of the receiver (200) outputs a download start request after the stream receiving unit (201) ends the reception of the one of the plurality of programs to download recorded data of another one of the plurality of programs which are recorded by the video-recording and distribution apparatus (102). The receiver (200) thus limits the number of programs which it receives simultaneously to one.

Abstract: An error extracting unit 7 detects that an error has occurred in a medium stream received, and determines the position of the occurrence. An error specific information adding unit 13 adds error specific information indicating that the error has occurred before the transcoding to an access unit on which the transcoding has been performed, the access unit corresponding to the medium stream in which the error has occurred at the time of the reception.

Abstract: Provided is a stream distribution system, including: a content server device for performing content distribution in a network; a reception terminal device capable of reproducing a content having a specific format; a plurality of transcoder devices provided in the network, for applying format conversion to a content distributed in the network; and a transcoder management device for searching, in response to a search request sent from the reception terminal device, information on the plurality of transcoder devices, and sending to the reception terminal device, as a search result, a transmission path which runs from the content server device to the reception terminal device via at least one of the plurality of transcoder devices, through which format conversion to a desired content can be performed.

Abstract: When the DRM mode indicated by a client terminal 1 differs from DRM (Digital Rights Management) modes available to a license server 2 and a distribution server 4, the license server 2 requests a DRM mode converting server 6 to convert the DRM mode of the multimedia contents. When the DRM mode converting server 6 receives the conversion request of the DRM mode, it converts the DRM mode of the multimedia contents distributed from the distribution server 4 to the DRM mode available to the client terminal 1, and transfers the multimedia contents passing through the conversion to the client terminal 1.

Abstract: A media delivering apparatus includes a parameter acquiring unit 3007 for acquiring at least one of the communication capability of a network 203, and the receiving capability of a media receiving apparatus 202, a media selecting unit 3006 for selecting media data to be delivered based on both the degree of media importance 204 assigned to each media data 205 and at least the one of the communication capability of the network and the receiving capability of the media receiving apparatus, a transmission-data generating unit 3008 for generating metadata in which both address information about each selected media data and presentation layout information are described, a data transmitting unit 2708 for delivering the metadata to the media receiving apparatus 202 by way of the network 202, and a media communication unit 2712 for delivering the media data 205 in response to a request from the media receiving apparatus 202.

Abstract: A data receiver (201) or gateway (203) notifies a data transmitter (202) of error conditions in the data receiver (201) or gateway (203) via networks 1 (204) and 2 (205). According to the error conditions, the data transmitter (202) transmits data at a packet length corresponding to the error rate even for the higher level protocol common the networks 1 (204) and 2 (205), as well. Thus, the fraction of packets lost can be reduced in the higher level protocol common to the networks 1 (204) and 2 (205).

Abstract: An RTP packet generating unit 11 packetizes data into packets, and adds identification information to the header of each of the packets, the identification information identifying each of the packets. An RTP packet encrypting unit 13 divides data included in each of the generated packets into blocks, and encrypts the data included in each of the packets on a block-by-block basis using an encryption key which an encryption key sharing unit 12 shares with a receiving client in such a manner that, when encrypting a first block of the data, the packet encrypting unit encrypts it using the identification information for identifying each of the packets, which is contained, as an initial vector, in the header of each of the packets, and, when encrypting each subsequent block of the data, encrypts it according to an encryption method which uses an immediately-previously-encrypted block.

Abstract: A data receiver (201) or gateway (203) notifies a data transmitter (202) of error conditions in the data receiver (201) or gateway (203) via networks 1 (204) and 2 (205). According to the error conditions, the data transmitter (202) transmits data at a packet length corresponding to the error rate even for the higher level protocol common the networks 1 (204) and 2 (205), as well. Thus, the fraction of packets lost can be reduced in the higher level protocol common to the networks 1 (204) and 2 (205).

Abstract: A software linking system in an information processor having an operating system in which plural sets of software are operable, includes an information obtaining means for obtaining information within the information processor, an anchor identifying means for judging whether or not there exists anchor information for specifying a linkage condition under which linking-source software recognizes linked software on the basis of the information obtained by the information obtaining means, and a linkage executing means for executing the linked software performing a linking operation corresponding to the anchor information identified by the anchor identifying means, whereby an anchor process is executed outside the linking software without changing the linking software and a file in a format thereof with the result that the software runs both on a linking source side and on a linked side.

Abstract: A software linking system in an information processor having an operating system in which plural sets of software are operable, includes an information obtaining means for obtaining information within the information processor, an anchor identifying means for judging whether or not there exists anchor information for specifying a linkage condition under which linking-source software recognizes linked software on the basis of the information obtained by the information obtaining means, and a linkage executing means for executing the liked software performing an linking operation corresponding to the anchor information identified by the anchor identifying means, whereby an anchor process is executed outside the linking software without changing the linking software and a file in a format thereof with the result that the software runs both on a linking source side and on a linked side.