WO2010134591A1 - Système de distribution de contenu, dispositif de distribution de contenu, procédé de distribution de contenu et programme de distribution de contenu - Google Patents

Système de distribution de contenu, dispositif de distribution de contenu, procédé de distribution de contenu et programme de distribution de contenu Download PDF

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Publication number
WO2010134591A1
WO2010134591A1 PCT/JP2010/058611 JP2010058611W WO2010134591A1 WO 2010134591 A1 WO2010134591 A1 WO 2010134591A1 JP 2010058611 W JP2010058611 W JP 2010058611W WO 2010134591 A1 WO2010134591 A1 WO 2010134591A1
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Prior art keywords
content
cache
storage
unit
broadcast
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PCT/JP2010/058611
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English (en)
Japanese (ja)
Inventor
宏之 秦野
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日本電気株式会社
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/23406—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving management of server-side video buffer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44004—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video buffer management, e.g. video decoder buffer or video display buffer

Definitions

  • the present invention relates to a system for distributing content such as video, and in particular, a content distribution system, a content distribution apparatus, a content distribution method, and a content distribution program that temporarily store content in a cache memory and read and distribute the content from the cache memory About.
  • a video distribution service that distributes video content such as movies, dramas, and broadcast programs over a network
  • the programs being broadcast are stored in real time on a server in the network, and the stored broadcast programs are distributed in response to user requests.
  • a time-shift distribution service is provided that enables a user to view a broadcast program at any time.
  • a content distribution system that implements a time shift distribution service is generally configured as shown in FIG. 20, and includes a content distribution apparatus 10, a client terminal 20, a broadcast server 30, a network 40, and a portal server 50, and includes a time shift.
  • the distribution server 10 receives broadcast content distributed by the broadcast server 30 via the network 40, accumulates the received broadcast content in the storage device 115 in real time, and stores the storage device 115 in response to a request from the client terminal 20. Broadcast content is read from and distributed.
  • the time-shift type content distribution system has a configuration in which the content distribution apparatus 10 has a cache memory 114 as shown in FIG. 19, so that broadcast content distributed by the content distribution apparatus 10 is temporarily stored in the cache memory 114.
  • the distribution performance is improved by using the cache technology that reduces the number of accesses to the storage device 115 that stores the broadcast content by storing the content in the cache memory 114 and distributing the content.
  • Patent Document 1 stores in a cache memory in response to a content distribution request, thereby reducing the number of accesses to a storage device during content distribution.
  • Related techniques to be realized are disclosed.
  • Patent Document 2 discloses a related technique for determining a storage condition in a cache based on past user viewing history and storing contents in a cache memory based on the storage condition.
  • the content to be distributed is stored in advance, but the time-shifted content distribution system receives broadcast programs distributed in real time and stores them in the storage device, and also from the client terminal.
  • the broadcast content stored in response to the time shift distribution request is distributed.
  • the time-shifted content distribution system has a problem that the number of times of writing to and reading from the storage device is greatly increased compared to the related content distribution system, and access is performed at a higher speed than the related content distribution system. Is required.
  • An object of the present invention is to provide a content distribution system that improves distribution performance by reducing the number of accesses to a storage device at the time of content distribution request by directly storing a received broadcast program in a cache memory area according to conditions.
  • a content distribution apparatus, a content distribution method, and a content distribution program are provided.
  • a first content distribution apparatus of the present invention includes a content receiving unit that receives distributable content, a content holding unit that stores the received content, a cache unit that temporarily stores the content, and a content holding unit or cache.
  • the content receiving means includes content delivery means for delivering the content stored in the means, and the content receiving means controls the storage of the content in the cache means based on the content storage control information set based on the broadcast channel information of the content.
  • a second content distribution method of the present invention is a content distribution method in a content distribution apparatus that receives content distributed from a broadcast server via a network and performs time-shift distribution, and receives the content from the broadcast server.
  • the content receiving step includes a step of controlling storage of the content in the cache unit based on the content storage control information set based on the broadcast channel information of the content.
  • a third content distribution program of the present invention is a content distribution program that is executed by a computer device that receives content distributed from a broadcast server via a network and performs time-shift distribution, and receives the content from the broadcast server.
  • Content receiving process for receiving, content holding process for storing received content in content holding means, processing for temporarily storing content in cache means, and content distribution for distributing content stored in content holding means or cache means The processing is executed by the computer device, and the content reception processing includes processing for controlling storage of the content in the cache unit based on the content storage control information set based on the broadcast channel information of the content.
  • a fourth content distribution system includes a broadcast server that distributes content, a content distribution device that receives time-distributed content distributed from the broadcast server, and performs time-shifted distribution, the broadcast server, or the content distribution server.
  • the content distribution device receives a content from a broadcast server, a content receiving unit that stores the received content, a content holding unit that stores the received content, and a cache that temporarily stores the content
  • content distribution means for distributing the content stored in the content holding means or the cache means, the content receiving means based on the content storage control information set based on the broadcast channel information of the content, Control storage of content to Yasshu means.
  • the number of accesses to the storage device can be greatly reduced and the distribution performance can be improved.
  • a time-shift content distribution system includes a content distribution device 10, a client group 20 that receives broadcast content, and a broadcast server 30 that distributes broadcast content.
  • the network 40 and the portal server 50 are included.
  • the content distribution apparatus 10 includes a content receiving unit 101, a content storage information holding unit 102, a cache control information holding unit 103, a cache unit 104, a content holding unit 105, a cache control unit 106, and a content distribution unit 107. , Content storage control table generation means 108.
  • the client group 20 is a terminal that receives broadcast content and has a function for connecting to a network.
  • the client group 20 will be described with three client terminals 20a, 20b, and 20c, but the number of clients is not limited.
  • the broadcast server 30 is a server that distributes broadcast content to each of the client terminals 20a to 20c of the client group 20 and the content distribution apparatus 10 via the network 40.
  • the network 40 is a network such as the Internet that connects the content distribution apparatus 10, the client terminals 20 a to 20 c of the client group 20, the broadcast server 30, and the portal server 50.
  • the portal server 50 is a server that provides a multicast address, a port number, and the like related to the broadcast distributed by the broadcast server 30 to the client terminals 20a to 20c of the client group 20 and the content distribution apparatus 10.
  • the content storage information holding unit 102 holds a content storage control table 200 as control information for storing the received broadcast content in the cache memory for each broadcast channel.
  • the content storage control table generating means 108 receives the multicast address, port number, viewing number, and storage threshold as broadcast channel information from the portal server 50, and each item of the content storage control table 200 held in the content storage information holding means 102. Set the value of.
  • FIG. 2 is an example of the content storage control table 200.
  • the content storage control table 200 includes a channel ID 201, a multicast address 202, a port number 203, a viewing number 204, and a storage threshold 205.
  • Channel ID 201 is an ID assigned to each broadcast channel, and is an ID set for a combination of a multicast address and a port number.
  • the multicast address 202 is an address used by the broadcast server 30 for distributing broadcast content.
  • the port number 203 is a port number used by the broadcast server 30 for distribution of broadcast content.
  • the number of views 204 is information indicating the number of client terminals that are receiving and directly viewing the corresponding broadcast content from the broadcast server.
  • the storage threshold 205 is information used to determine whether or not the corresponding broadcast content is stored in the cache unit 104. If the number of views 204 is greater than or equal to the storage threshold 205, the received broadcast content Is stored in the cache means 104, and when the number of views 204 is less than the storage threshold value 205, the received broadcast content is used for the determination that the cache means 104 is not stored.
  • the cache control information holding unit 103 holds a cache control table 300 as information for controlling the cache memory for each broadcast channel.
  • FIG. 3 is an example of the cache control table 300.
  • the cache control table 300 includes a channel ID 301, a block ID 302, a start time 303, an end time 304, an access presence / absence 305, and a cache deletion timer 306.
  • the channel ID 301 is an ID assigned to each broadcast channel, and is the same as the channel ID 201 included in the content storage control table 200.
  • Block ID 302 is an ID given to each block when the broadcast content of one channel is divided into a plurality of cache blocks.
  • the start time 303 indicates the time when the cache storage is started, and the end time 304 indicates the time when the cache storage is ended.
  • the end time 304 is not set when cache storage continues.
  • Access presence / absence 305 is information indicating whether or not read access for distribution to the cache of the corresponding block is performed.
  • the cache deletion timer 306 is information indicating a waiting time until data is deleted when access to the corresponding block is not performed for a predetermined time or more.
  • the content receiving unit 101 receives video content such as movies and dramas distributed from the broadcast server 30 via the network 40.
  • the content receiving unit 101 stores the received broadcast content in the cache unit 104 and the content holding unit 105 in accordance with the conditions set in the content storage control table 200 stored in the content storage information holding unit 102.
  • the content receiving unit 101 when storing the received broadcast content in the cache unit 104 as a new block ID, registers a new block ID in the cache control table 300 stored in the cache control information holding unit 103.
  • the cache unit 104 functions as a cache memory that temporarily stores part or all of the broadcast content, and holds broadcast content that can be distributed.
  • the cache unit 104 is realized by a RAM (Random Access Memory) or the like.
  • the content holding unit 105 is a unit that stores distributable broadcast content, and is realized by, for example, a hard disk device including a nonvolatile memory such as a magnetic disk or a semiconductor memory.
  • the broadcast content stored in the content holding unit 105 is video content such as a movie or a drama distributed from a broadcast server, for example.
  • the cache control unit 106 stores the content of the content holding unit 105 in the cache unit 104 according to an instruction from the content distribution unit 107.
  • the cache control unit 106 determines whether each broadcast content stored in the cache unit 104 is in accordance with the conditions of the access presence / absence 305 and the cache deletion timer 306 set in the cache control table 300 stored in the cache control information holding unit 103. Delete the cache.
  • the cache control means 106 confirms the status of each broadcast content registered in the cache control table 300 at a fixed period, and for a block that has lost access, a timer set in the cache control table 300 Set the value time timer.
  • the content distribution unit 107 receives the time shift distribution request from each of the client terminals 20a to 20c of the client group 20, and is requested to distribute according to the cache information set in the cache control table 300 stored in the cache control information holding unit 103.
  • the broadcast content stored in the cache unit 104 is read, the broadcast content is read from the cache unit 104 and distributed to the client terminals 20a to 20c of the client group 20 via the network 40.
  • the content distribution unit 107 instructs the cache control unit 106 to store the corresponding broadcast content in the cache unit 104. Then, the broadcast content is read from the content holding means 105 and distributed to the client terminals 20a to 20c of the client group 20 via the network 30.
  • the content storage control table generating means 108 receives the multicast address, port number, viewing number, and storage threshold from the portal server 50 as broadcast channel information (step S401 in FIG. 4).
  • the content storage control table generation means 108 generates or updates the content storage control table 200 using the received broadcast channel information (multicast address, port number, number of views, storage threshold) (step S402 in FIG. 4). .
  • the content storage control table generation means 108 searches the content storage control table 200 held by the content storage information holding means 102 using the multicast address and port number as keys in the received broadcast channel information (step S501). Then, the content storage control table generation unit 108 checks whether the channel ID corresponding to the received multicast address and port number is registered in the content storage control table 200 (step S502).
  • the content storage control table generation means 108 displays the number of views corresponding to the corresponding channel ID. 204 and the value of the storage threshold 205 are updated to the number of views received as the broadcast channel information and the value of the storage threshold (step S503).
  • step S502 “NO”) If the channel ID corresponding to the received multicast address and port number is not registered in the content storage control table 200 (step S502 “NO”), the content storage control table generating means 108 generates a new channel ID (step S502). In step S504, the content reception unit 101 is instructed to start receiving broadcast content (step S505).
  • the case where the content storage control table generating unit 108 receives the storage threshold value 205 from the portal server 50 is shown.
  • this operation is not particular, and for example, the storage threshold value 205 is set in advance to the content distribution device. It is also possible to adopt a method in which the value is set in 10 setting files or the like and the value is used.
  • the value of the storage threshold can be arbitrarily set.
  • the provider that provides the broadcast or the provider that provides the video distribution service sets it according to the popularity of the program.
  • the content receiving unit 101 receives broadcast content from the broadcast server 30 via the network 40 and stores the received broadcast content in the cache unit 104 and the content holding unit 105 will be described with reference to the flowchart of FIG. .
  • the content storage control table sets the corresponding channel ID using the multicast address and port number of the received broadcast content as keys. Search from 200 (step S602).
  • the number of views 204 of the corresponding channel ID as a result of the search is compared with the value of the storage threshold 205 to check whether the number of views is equal to or greater than the storage threshold (step S603).
  • step S603 “YES”) the content receiving unit 101 has a block ID storing broadcast content in the corresponding channel ID of the cache control table 300. (Step S604).
  • step S604 “YES”) the content receiving unit 101 stores the received broadcast content in the cache unit 104 (step S605).
  • the content receiving unit 101 If the corresponding block ID does not exist in the cache control table 300, the content receiving unit 101 generates a new block ID in the cache control table 300 (step S606), and stores the received broadcast content in the cache unit 104 (step S606). S605).
  • step S603 “NO”) when the number of views of the corresponding channel ID is less than the storage threshold (step S603 “NO”), the content receiving unit 101 stores the block ID storing the broadcast content in the corresponding channel ID of the cache control table 300. It is confirmed whether it exists (step S607). When the corresponding block ID exists (step S607 “YES”), the final storage time is set to the end time 304 corresponding to the corresponding block ID (step S608).
  • the content receiving unit 101 stores the received broadcast content in the content holding unit 105 (step S609). After storing the received broadcast content, the content receiving unit 101 checks again the reception of the broadcast content (step S601).
  • three channels of channel IDs 001, 002, and 003 are registered in the content storage control table 200, and the viewing number and storage threshold notified from the portal server 50 are set for each channel ID. ing.
  • the content receiving unit 101 receives the broadcast content of the channel ID 001 when received.
  • the broadcast content is stored in the cache unit 104 and stored in the content holding unit 105.
  • FIG. 17 shows an example of the cache control table 300 at this time.
  • the block ID 001 of the channel ID 001 has a start time set, but an end time is not set, indicating that the received content is being stored in the cache.
  • the client terminals 20a to 20c view the broadcast content, pause during viewing, and then resume viewing so that the content distribution apparatus 10 time-shifts the broadcast content with respect to the client terminals 20a to 20c.
  • the operation at the time of distribution will be described with reference to the sequence diagram of FIG.
  • the client terminals 20a to 20c make a broadcast content viewing request to the portal server 50 (step S801).
  • the portal server 50 Upon receiving the viewing request, the portal server 50 notifies the client terminals 20a to 20c of the multicast address of the broadcast content and the address of the time shift distribution server (step S802).
  • the client terminals 20a to 20c start receiving the multicast distributed from the broadcast server 30 (step S803).
  • the client terminals 20a to 20c stop the multicast reception by the pause operation (step S804).
  • the client terminals 20a to 20c make a time shift distribution request (step S806) to the content distribution apparatus 10 by a viewing resumption operation (step S805). Specifically, a multicast address, a port number, and a viewing start time are transmitted as a distribution request.
  • the content distribution apparatus 10 starts time-shifted distribution from the position of the designated viewing start time of the corresponding broadcast content to the client terminals 20a to 20c that have requested distribution (step S807).
  • the content distribution unit 107 When the content distribution unit 107 receives a time shift distribution request from the client terminals 20a to 20c, the content distribution unit 107 searches the content storage control table 200 held in the content storage information holding unit 102 using the multicast address and port number designated for distribution as keys. The channel ID is acquired (step S901).
  • the content distribution means 107 searches the cache control table 300 in the cache control information holding means 103 using the acquired channel ID and viewing start time as keys (step S902), and a cache block including the designated location of the corresponding broadcast content Is stored in the cache means 104 (step S903).
  • step S903 “YES”) the content distribution unit 107 reads the designated location of the corresponding cache block from the cache unit 104, and the client Distribution is performed to the terminals 20a to 20c (step S904).
  • the content distribution unit 107 sets the access presence / absence 305 of the corresponding cache block to “present”, and deletes it when the cache deletion timer is set (step S905).
  • FIG. 3 An example of the cache control table 300 is shown in FIG.
  • the end time 304 is not set for a cache block that is continuously stored in the cache, and when the storage in the cache is completed, the end time 304 is set as the end time.
  • the cache deletion timer is not set for the cache block that has read access to the cache.
  • a cache deletion timer is set for cache blocks that do not access the cache.
  • the setting of the cache deletion timer is controlled by the cache control means 106.
  • the cache control means 106 confirms the state of each cache block registered in the cache control table 300 at a constant cycle, and sets the block for which access has been lost. On the other hand, a timer having a timer value set in the cache control table 300 is set.
  • the block that has lost access refers to the block that has not been accessed for a certain period of time.
  • the cache control means 106 holds the last access time of each cache block as a work memory, and regards a block that has not been accessed for a certain period of time from the last access time as a block that has lost access. Note that the last access time of each cache block may be held as a separate column in the cache control table 300.
  • step S903 “NO”) the content distribution unit 107 instructs the cache control unit 106 to transfer the data after the designated location to the cache unit 104. Storage is instructed (step S906).
  • the content distribution unit 107 reads the data after the designated location from the content holding unit 105, and distributes it to the client terminals 20a to 20c (step S907).
  • the cache control unit 106 When the cache control unit 106 receives a cache storage instruction from the content distribution unit 107, the cache control unit 106 searches the content storage control table 200 held in the content storage information holding unit 102 using the designated multicast address and port number as a key, and responds accordingly. A channel ID is acquired (step S1101).
  • the cache control unit 106 searches the cache control table 300 held in the cache control information holding unit 103 by using the acquired channel ID and storage start time as a key (step S1102), and the cache block including the designated location is found. It is confirmed whether it is registered in the cache control table 300 (step S1103).
  • the cache control unit 106 determines the channel ID and block corresponding to the broadcast content corresponding to the cache control table 300. An ID is newly generated, and a start time, access presence / absence, and a cache deletion timer are set (step S1104). Further, the cache control unit 106 stores the portion after the designated portion of the corresponding broadcast content in the cache unit 104 (step S1105).
  • the cache control unit 106 refers to the cache control table 300 stored in the cache control information holding unit 103, and checks the presence / absence of access for each cache block cached in the cache unit 104 (step S1201). If the cached data is being accessed (step S1201 “YES”), the process proceeds to step S1204.
  • step S1201 “NO”) the cache control unit 106 checks whether the timer set in the cache deletion timer 306 for the cached data has expired ( Step S1202). If the cache deletion timer has not expired (step S1202 “NO”), the process proceeds to step S704.
  • Whether the cache deletion timer of the cache control table 300 has expired is determined by comparing the elapsed time from the time when the cache data is stored in the cache means 104 or the last cache access with the cache deletion timer 306 and the elapsed time Is determined by whether or not the cache deletion timer 306 has passed.
  • the elapsed time from the start time 303 indicating the time stored in the cache unit 104 to the current time is compared with the cache deletion timer time 306. To do.
  • the elapsed time from the last cache access is compared with the cache deletion timer 306.
  • the last cache access time is held as work memory by the cache control means 106. Further, the last cache access time may be held as another column of the cache control table.
  • step S1202 If the cache deletion timer has expired (step S1202 “YES”), the cache data is deleted from the cache means 103, and the corresponding channel ID and block ID entries in the cache control table 300 are deleted (step S1203).
  • step S1204 If the cache data is being accessed in step S1201, if the cache deletion timer 306 has not expired in step S1202, or after the processing in step S1203 is completed, the cache control unit 106 determines that all cache blocks in the cache control table 300 have been accessed. It is determined whether or not the process has been completed (step S1204).
  • step S1204 “NO”) the cache control means 106 performs the processing from step S1201 to S1203 for the next channel ID and block ID. carry out.
  • the cache control means 106 performs the above-described series of processing (steps S1201 to S1203) for all channel IDs and block IDs registered in the cache control table 300, and ends the processing (step S1204 “YES”). ).
  • the processing shown in FIG. 12 described above by the cache control unit 106 is periodically executed at a time interval such as every minute, and the cache control table 300 and the cache data of the cache unit 104 are updated.
  • the broadcast content since the broadcast content is stored directly in the cache unit 104 when the broadcast content is received, the broadcast content can be stored in the cache unit 104 prior to a time shift viewing request from the user. For this reason, it is possible to reduce the number of accesses to the content holding unit 105 in the time-shifted distribution request from the client terminal as compared with the related art method, and the content holding unit 105 of the content distribution apparatus 10 can be made at lower cost. It can be configured.
  • the content receiving unit 101 controls the storage of the broadcast content in the cache unit 104 based on content storage control information set based on the number of views of the broadcast content being viewed when the broadcast content is received.
  • the broadcast content that is most likely to be requested for time-shift distribution is stored in the cache unit 104, so that the number of accesses to the content holding unit 105 can be reduced.
  • the configuration of the time shift type content distribution system and the content distribution apparatus 10 according to the second embodiment is the same as the configuration of the first embodiment shown in FIG.
  • FIG. 13 shows the content storage control table 200 in the second embodiment.
  • the difference from the first embodiment is that the storage of content in the cache means 104 is controlled using the audience rating rather than the storage threshold as a condition for storing the received broadcast content.
  • the content storage control table generating means 108 receives the multicast address, port number, and number of views as broadcast channel information from the portal server 50 (step S1401 in FIG. 14).
  • the content storage control table generation means 108 generates or updates the content storage control table 200 using the received broadcast channel information (multicast address, port number, number of views) (step S1402).
  • the difference from the first embodiment is that the storage threshold is not included in the broadcast channel information.
  • the content storage control table generation unit 108 searches the content storage control table 200 held by the content storage information holding unit 102 using the received multicast address and port number as keys (step S1501).
  • step S1502 “NO”) If the corresponding broadcast content is not registered in the content storage control table 200 (step S1502 “NO”), the content storage control table generation unit 108 generates a new channel ID (step S1503) and sends it to the content reception unit 101. The broadcast content reception start is instructed (step S1504).
  • step S1502 When the corresponding broadcast content is registered in the content storage control table 200 (step S1502 “YES”), and after the processing of step S1504, the content storage control table generation unit 108 views all entries from the received number of views. The rate is calculated and all entries are updated (step S1405). As shown in FIG. 13, the audience rating is the percentage of the number of views of each entry in the total number of views of all entries, expressed as a 100-minute rate.
  • the content receiving unit 101 searches the content storage control table 200 using the multicast address and port number of the received broadcast content as a key (step S1602). The rank ranking of channel ID is calculated.
  • step S1603 “YES”) the content receiving unit 101 has a block ID that is storing the cache block in the channel ID corresponding to the cache control table 300. (Step S1604).
  • step S1604 If the corresponding block ID exists (step S1604 “YES”), the content receiving unit 101 stores the received broadcast content in the cache unit 104 (step S1605).
  • step S1604 “NO”) the content receiving unit 101 generates a new block ID in the cache control table 300 (step S1606), and stores the received broadcast content in the cache unit 104 (step S1604). Step S1605).
  • the content receiving unit 101 When the audience rating of the corresponding channel ID is 4th or lower (step S1603 “NO”), the content receiving unit 101 has a block ID that is storing the cache block in the corresponding channel ID of the cache control table 300. If the corresponding block ID exists (step S1607 “YES”), the final storage time is set to the end time 304 corresponding to the corresponding block ID (step S1608).
  • the content receiving unit 101 stores the received broadcast content in the content holding unit 105 (step S1609). After storing the received broadcast content, the content receiving unit 101 confirms reception of the broadcast content again (step S1601).
  • the broadcast contents with the channel IDs 001, 005, and 006 are within the top three ratings, so the data is stored in the cache unit 104 when the broadcast contents are received.
  • the case where the top three rankings of the audience rating are stored in the cache unit 104 is shown.
  • this condition is not particular, and for example, the audience rate of 20% or more is stored in the cache unit 104. It is a very good condition for storing up to 80% of the total audience rating. It is not limited to the above example as long as it is a condition for storing the highest audience rating.
  • the effect of taking the second form is that storage control in the cache memory at the time of broadcast content reception can be performed according to the audience rating, and the cache memory can be controlled according to real-time fluctuation of the popularity of the broadcast content Therefore, it is possible to reduce the number of accesses to the broadcast content holding means 105 at the time-shift distribution.
  • FIG. 18 is a block diagram illustrating a hardware configuration example of the content distribution apparatus 10.
  • the content distribution apparatus 10 has a hardware configuration similar to that of a general computer apparatus, and includes a data work area including a memory such as a CPU (Central Processing Unit) 1801 and a RAM (Random Access Memory). And a main storage unit 1802 used for a temporary data saving area, a communication unit 1803 that transmits / receives data via a network, an input / output interface that transmits / receives data by connecting to the input device 1805, the output device 1806, and the storage device 1807 1804, and a system bus 1808 for connecting the above-described components to each other.
  • the storage device 1807 is realized by, for example, a hard disk device including a non-volatile memory such as a ROM (Read Only Memory), a magnetic disk, and a semiconductor memory.
  • the content distribution apparatus 10 implements its operation in hardware by mounting circuit components that are hardware components such as LSI (Large Scale Integration) incorporating a program.
  • a program that provides functions such as the content receiving unit 101, the cache control unit 106, the content distribution unit 107, and the content storage control table generation unit 108 of the content distribution apparatus 10 is stored in the storage device 1807, and the program is stored in the main storage unit. It can also be realized by software by loading it to 1802 and executing it by the CPU 1801.
  • the present invention can be applied to the use of distributing video content such as broadcast programs and movies via a network.
  • the present invention can be applied to a content distribution system that has a large-scale subscriber requiring high distribution performance and distributes popular content.

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  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Afin d'améliorer une performance de distribution de contenu, le nombre d'accès à un dispositif de stockage pendant des requêtes de distribution de contenu est réduit par stockage de manière directe de diffusions reçues dans des régions de mémoire cache conformément à des conditions. L'invention porte sur un dispositif de distribution de contenu (10) qui comprend un moyen de réception de contenu (101) qui reçoit un contenu apte à être distribué, un moyen de conservation de contenu (105) qui stocke le contenu reçu, un moyen de cache (104) qui stocke de manière temporaire le contenu, et un moyen de distribution de contenu (107) qui distribue le contenu stocké dans le moyen de conservation de contenu (105) ou dans le moyen de cache (104). Le moyen de réception de contenu (101) commande le stockage du contenu dans le moyen de cache (104) conformément aux informations de commande de stockage de contenu configurées sur la base d'informations de canal de diffusion du contenu.
PCT/JP2010/058611 2009-05-21 2010-05-21 Système de distribution de contenu, dispositif de distribution de contenu, procédé de distribution de contenu et programme de distribution de contenu WO2010134591A1 (fr)

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JP2009-122803 2009-05-21
JP2009122803 2009-05-21

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001051901A (ja) * 1999-08-05 2001-02-23 Toshiba Corp キャッシュ記憶装置
JP2003263359A (ja) * 2002-03-12 2003-09-19 Fujitsu Ltd コンテンツ管理装置及びコンテンツ管理プログラム
JP2004080632A (ja) * 2002-08-21 2004-03-11 Ando Electric Co Ltd 動画配信システム及び方法
WO2004040908A1 (fr) * 2002-10-30 2004-05-13 Fujitsu Limited Serveur de flux continu
JP2008529396A (ja) * 2005-01-31 2008-07-31 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ デジタルコンテンツの配信
JP2009104381A (ja) * 2007-10-23 2009-05-14 Fujitsu Ltd キャッシュ制御プログラム、該プログラムを記録した記録媒体、キャッシュ制御装置、およびキャッシュ制御方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001051901A (ja) * 1999-08-05 2001-02-23 Toshiba Corp キャッシュ記憶装置
JP2003263359A (ja) * 2002-03-12 2003-09-19 Fujitsu Ltd コンテンツ管理装置及びコンテンツ管理プログラム
JP2004080632A (ja) * 2002-08-21 2004-03-11 Ando Electric Co Ltd 動画配信システム及び方法
WO2004040908A1 (fr) * 2002-10-30 2004-05-13 Fujitsu Limited Serveur de flux continu
JP2008529396A (ja) * 2005-01-31 2008-07-31 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ デジタルコンテンツの配信
JP2009104381A (ja) * 2007-10-23 2009-05-14 Fujitsu Ltd キャッシュ制御プログラム、該プログラムを記録した記録媒体、キャッシュ制御装置、およびキャッシュ制御方法

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