JP2008090369A - Content receiving device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a content receiving device and a content receiving method for receiving updated content in proper timing. <P>SOLUTION: A reception time guessing part 57 guesses the trend of an update time described in a content list, and determines the reception time. The determined reception time and the address of the content list disclosed on a network are recorded in a reception setting recording part 520. A data management part 56 transmits a content list request based on the address of the content list by using a transmission/reception part 51 in the recorded reception time, and receives the content list, and specifies the content updated on the basis of the received content list, and receives the specified content by transmitting a content request based on the address described in the content list, and records the received content in a content recording part 523. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a content receiving apparatus and a content receiving method for receiving content such as audio data, image data, and video data via a network, and in particular, based on a content list in which a content address (URL) is described. The present invention relates to a content receiving apparatus and a content receiving method that are received by the Internet.

  In recent years, network environments such as the Internet have been improved, and content such as audio data, image data, and video data has been provided to user-owned content receiving devices via the network, and has been published on the network. The problem is how to provide the content desired by the user from a large number of contents at an appropriate timing.

  When the content receiving device is a mobile communication portable terminal such as a mobile phone or PHS, the content desired by the user is distributed from the communication provider system at the timing desired by the user based on information registered in advance by the user. Although it is possible (for example, refer patent document 1), when a content receiver is a personal computer or an audio terminal, in order to receive the content published on the network, the content is disclosed A content request based on an address (URL) on the network needs to be transmitted from the content receiving device, and in order to receive periodically updated content, the content receiving device uses a timer function and is set by the user By receiving content at the reception time It is response.

However, when the content reception operation is performed at the reception time set by the user using the timer function as in the prior art, if the content is updated after the reception time set by the user, the reception time is set. There is a problem in that the updated content cannot be received and the updated content must be received until the next reception time.
Japanese Patent Laid-Open No. 11-136365

  The present invention has been made in view of such problems, and an object thereof is to provide a content receiving apparatus and a content receiving method capable of receiving updated content at an appropriate timing. .

In order to solve the above problems, the present invention has the following configuration.
The content receiving apparatus of the present invention describes the address and update time of content published on the network, and receives the content via the network based on the content list published on the network A receiving device that determines a reception time for receiving the content by estimating a trend of the update time described in the content list, and is determined by the reception time estimating unit; A reception setting recording means for recording the reception time and the address of the content list published on the network; and a content list based on the address of the content list at the reception time recorded in the reception setting recording means By sending a request, the content list The content list receiving means for receiving the content, the updated content specifying means for specifying the content updated based on the content list received by the content list receiving means, and the content specified by the updated content specifying means A content receiving means for receiving a content request based on an address described in the content list; and a content recording means for recording the content received by the content receiving means. .

Furthermore, the content reception device of the present invention is characterized in that the reception time estimation means determines the time after the latest update time described in the content list as the reception time.

  Further, in the content receiving device of the present invention, when the reception time estimating unit cannot identify the content updated by the updated content identifying unit, the content list received next by the content list receiving unit The reception time for receiving the content is re-determined by estimating the trend of the update time described in the above.

  In the content receiving method of the present invention, the address of the content published on the network and the update time are described, and the content is received via the network based on the content list published on the network. A content reception method for determining a reception time for receiving the content by estimating a trend of the update time described in the content list, and publishing the determined reception time and the network on the network The content list is recorded, and the content list is received by transmitting a content list request based on the content list address at the recorded reception time, and the received content list is received. The content updated based on And, the content that the specific, received by sending a content request based on the address described in the content list, and recording the content thus received.

  Furthermore, the content reception method of the present invention is characterized in that a time after the latest update time described in the content list is determined as the reception time.

  Furthermore, the content receiving method of the present invention receives the content by estimating a trend of the update time described in the next received content list when the updated content cannot be identified. The reception time is determined again.

  The content receiving apparatus and the content receiving method of the present invention determine a reception time for receiving content by estimating a trend of update times described in a content list, and are made public on the determined reception time and network. The content list address is recorded, and at the recorded reception time, the content list is received by sending a content list request based on the content list address, and the updated content is identified based on the received content list. Then, the specified content is received by sending a content request based on the address described in the content list, and the received content is recorded, so that the content is updated in the content list. Receive based on time Determining the time, since the accuracy that can be received at the earliest possible timing updated content is increased, an effect that can receive the updated content at the right time.

  Furthermore, the content receiving apparatus and the content receiving method of the present invention are configured to determine the time after the latest update time described in the content list as the reception time, thereby more reliably receiving the updated content. There is an effect that can be done.

  Furthermore, the content receiving apparatus and the content receiving method of the present invention receive content by estimating the tendency of the update time described in the next received content list when the updated content cannot be identified. Since the reception time can be changed according to the content update substance in the content list by reconfiguring the reception time to be performed, even when the content update time in the content list is changed, There is an effect that the updated content can be reliably received.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a system configuration diagram showing an example of a distribution system that distributes content to an embodiment of a content receiving apparatus according to the present invention, and FIG. 2 shows a cast recorded in a cast site server shown in FIG. FIG. 3 is a diagram showing an example of a site list, FIG. 3 is a diagram showing an example of a content list recorded in the content list server shown in FIG. 1, and FIG. 4 is a diagram of an embodiment of a content receiving apparatus according to the present invention. FIG. 5 is a block diagram showing a configuration, and FIG. 5 is a diagram showing an example of reception settings recorded in the reception setting recording unit shown in FIG.

  A distribution system that distributes content contents such as audio data, image data, and video data to the content receiving apparatus 50 according to the present embodiment, as shown in FIG. 1, is a cast site list via a network 10 such as the Internet. , A content list server 30 that distributes a content list via the network 10, a content server 40 that distributes content via the network 10, and a cast site list via the network 10 And a content receiving device 50 for receiving the content list and the content. In the present embodiment, description will be made in terms of functionally divided into the cast site server 20, the content list server 30, and the content server 40. However, the cast site server 20, the content list server 30, and the content server 40 are configured as programs. It can be realized as a server system composed of one or more information processing devices that operate by control, and each server may be managed by different operators, or two or more of each server may be managed by the same operator. Anyway.

  The cast site server 20 has a function as a Web server that responds to various requests from the content receiving device 50, and includes a cast site list recording unit 21, a guide information recording unit 22, a request response unit 23, and a transmission / reception unit 24. And.

  The cast site list recording unit 21 is a recording unit such as an HDD in which a cast site list is recorded. The cast site list is a structured document described in a meta language, and the name of the content list and the address on the network 10 where the content list is published (hereinafter referred to as a list URL) are described using tags. It is a list. Referring to FIG. 2, the cast site list in the present embodiment is a structured document described in OPML (Outline Processor Markup Language), which is one of XML (Extensible Markup Language) specifications.

  In FIG. 2, <? Xml version = "1.0" encoding = "UTF-8"?> Is an XML declaration indicating that the cast site list is an XML document, and between the end tag </ head>, Start indicating that the cast site list name is described as an element between the start tag <head> indicating that the cast site list name and creation date and time are described as elements, and the end tag </ title> Between the tag <title> and the end tag </ dateCreated>, between the start tag <dateCreated> indicating that the creation date is described as an element and the end tag </ body> Between the start tag <body> and the end tag </ outline> indicating that a group name, multiple content list names, and list URLs are described as elements, multiple content list names and list URLs are used as elements. As well as indicate Start tag <outline> indicating that the group name of the content list is described as an attribute, and empty element tag <outline / indicating that the content list name (text) and the list URL (xmlUrl) are described as attributes > And.

  Therefore, in the cast site list example shown in FIG. 3, the cast site list name “ΔΔΔ cast site” and its creation date and time are described, and the content list name “XXX News” is added to the group name “news”. ”And“ Today's stock price ”and its list URL, and the group name“ voice blog ”describes the content list names“ net talk ”and“ hero ”and its list URL.

  The guidance information recording unit 22 is a recording unit such as an HDD in which a guidance page created using a language different from the meta language used in the cast site list, for example, HTML (HyperText Markup Language) is recorded. For example, a guide page for notifying that the requested address is an address for distributing a cast site list described in OPML is recorded.

  When receiving the cast site list request from the content receiving device 50, the request response unit 23 transmits the cast site list recorded in the cast site list recording unit 21 to the content receiving device 50 via the network 10 by the transmission / reception unit 24. When a request other than the cast site list request is received, the guide page recorded in the guide information recording unit 22 is transmitted via the network 10 by the transmission / reception unit 24. That is, the cast site list request from the content receiving device 50 is a request for sending a cast site list described in OPML, and the request header (hereinafter referred to as a request header) such as an HTTP header corresponds to OPML (XML). The request response unit 23 receives the cast site list recorded in the cast site list recording unit 21 when the request header describes that the request header is OPML compatible. When the request header does not describe that it is OPML compatible, the request is recognized as a request from a Web browser compatible with HTML, and the guidance information recording unit 22 HTM recorded in Transmitting via the network 10 by the transceiver unit 24 of the information page created using.

  The transmission / reception unit 24 has a function of connecting to the network 10 by wire or wireless, and performs information communication with the content reception device 50 via the network 10 based on a protocol such as HTTP (HyperText Transfer Protocol) or FTP (File Transfer Protocol). I do.

  The content list server 30 has a function as a Web server that responds to various requests from the content receiving device 50, and includes a content list recording unit 31, a guide information recording unit 32, a request response unit 33, and a transmission / reception unit 34. It has.

  The content list recording unit 31 is a recording unit such as an HDD in which a content list is recorded. The content list is a structured document described in a meta language, and the name of the content using a tag, the address on the network 10 where the content is published (hereinafter referred to as a data URL), and the data type of the content are This is a written list. Referring to FIG. 3, the content list of the present embodiment is described in RSS (Rich Site Summary), which is one of XML (Extensible Markup Language) specifications.

  In FIG. 3, <? Xml version = "1.0" encoding = "UTF-8"?> Is an XML declaration indicating that the content list is an XML document, and the element between the end tag </ rss> is Between the start tag <rss> indicating that it is described by RSS and the end tag </ channel>, there are a content list name, a content name, an outline of the content, a data URL, and a data type that can be downloaded from the data URL. Between the start tag <channel> indicating that it is described as an element and the end tag </ title>, a start tag <title> indicating that the content list name is described as an element, and an end tag < / item> between the start tag <item> and the end tag </ pubDate> indicating that the content name, content overview, data URL, and data type are described as elements. Update time, After that, an outline of the content is included as an element between the start tag <pubDate> and the end tag </ description> indicating that the time newly published in the network 10 and newly added to the content list is described as the element. It consists of a start tag <description> indicating that it is described, and an empty element tag <enclosure /> indicating that the data URL and data type are described as attributes. In the empty element tag <enclosure />, other information related to the content to be distributed such as the data amount of the content may be described as an attribute.

  The guidance information recording unit 22 is a recording unit such as an HDD in which a guidance page created using a language different from the meta language used in the content list, for example, HTML (HyperText Markup Language) is recorded. A guide page for notifying that the requested address is an address for distributing a content list described in RSS is recorded.

  Upon receiving the content list request from the content receiving device 50, the request response unit 33 transmits the content list recorded in the content list recording unit 31 to the content receiving device 50 via the network 10 by the transmission / reception unit 34. When a request other than is received, the guide page recorded in the guide information recording unit 32 is transmitted via the network 10 by the transmission / reception unit 34. That is, the content list request from the content receiving device 50 is a content list transmission request described in RSS, and it is described in the request header that it corresponds to RSS (XML). If the request header describes that it is RSS-compatible, the content list recorded in the content list recording unit 31 is transmitted to the content receiving device 50 via the network 10 by the transmission / reception unit 34, and the request header includes RSS. If it is not described that it is compatible, the request is recognized as a request from a Web browser compatible with HTML, and the guide page recorded in the guide information recording unit 32 is transmitted via the network 10 by the transmission / reception unit 34. To do.

  The transmission / reception unit 34 has a function of connecting to the network 10 by wire or wireless, and performs information communication with the content reception device 50 via the network 10 based on a protocol such as HTTP (HyperText Transfer Protocol) or FTP (File Transfer Protocol). I do.

  The content server 40 has a function as a Web server that responds to various requests from the content receiving device 50, and includes a content recording unit 41, a request response unit 42, and a transmission / reception unit 43.

  The content recording unit 41 is a recording unit such as an HDD in which contents such as “audio data”, “image data”, and “video data” are recorded.

  When the content request is received from the request response unit 42 and the content reception device 50, the content recorded in the content recording unit 41 is transmitted to the content reception device 50 via the network 10 by the transmission / reception unit 43.

  The transmission / reception unit 43 has a function of connecting to the network 10 by wire or wireless, and performs information communication with the content reception device 50 via the network 10 based on a protocol such as HTTP (HyperText Transfer Protocol) or FTP (File Transfer Protocol). I do.

  The content receiving device 50 according to the present embodiment is a portable information processing device that operates under program control of an audio player or the like that reproduces content (audio data, image data, video data), and is used for a cast site list. A meta language (OPML) and a meta language (RSS) used in the content list, and a transmission / reception unit 51, an information recording unit 52, and a display unit 53 such as a liquid crystal display. An operation unit 54, a reproduction processing unit 55, a data management unit 56, and a reception time estimation unit 57.

  The transmission / reception unit 51 has a function of connecting to the network 10 by wire or wireless, and based on a protocol such as HTTP (HyperText Transfer Protocol) or FTP (File Transfer Protocol), the cast site server 20, the content list server 30, and the content server 40, information communication.

  The information recording unit 52 is a reception setting recording unit 520 that records reception settings for periodically receiving content updated on the content list, and a recording unit such as an HDD or a silicon memory. The cast site list recording unit 521 in which the cast site list received from the content list is recorded, the content list recording unit 522 in which the content list received from the content list server 30 is recorded, and the content in which the content received from the content server 40 is recorded. And a recording unit 523. Referring to FIG. 5, the reception setting recorded in the reception setting recording unit 520 includes a content list name and its list URL, and a reception time when the content is received. This is set by specifying a content list to be received automatically.

  The display unit 53 is a display unit such as a liquid crystal display. The cast site list recorded in the cast site list recording unit 521, the content list recorded in the content list recording unit 522, and the content recording unit 523 are recorded. A list of contents is displayed, and images and videos reproduced by the reproduction processing unit 55 based on the contents recorded in the content recording unit 523 are displayed.

  The operation unit 54 is an operation unit such as an operation button, and inputs a cast site list acquisition instruction for instructing acquisition of a cast site list recorded in the cast site server 20 and a content list recorded in the content list server 30. Content list acquisition instruction input for instructing acquisition of the content and various inputs related to reproduction of the received and recorded content.

  The reproduction processing unit 55 decompresses and reproduces the content recorded in the content recording unit 523 of the information recording unit 52, displays images and videos on the display unit 53, and outputs audio to the connected headphones 58. .

  The data management unit 56 analyzes the meta-language of the cast site list, that is, analyzes each tag of OPML, thereby recognizing the contents described as tag elements and attributes in the cast site list, It has a function of recognizing the contents described as elements and attributes of the tag in the cast site list by analyzing the meta language, that is, analyzing each tag of RSS, and the cast site via the network 10 by the transmission / reception unit 51 By causing the server 20 to send a cast site list request, the cast site list is received from the cast site server 20, the received cast site list is recorded in the cast site list recording unit 521, displayed on the display unit 53, and transmitted / received Net by part 51 By sending a content list request to the content list server 30 via the network 10, the content list is received from the content list server 30, the received content list is recorded in the content list recording unit 522, and displayed on the display unit 53. .

  The reception time estimation unit 57 extracts and collects all the content update times described in the content list by referring to the start tag <pubDate> indicating that the content update time is described as an element. The reception time is determined based on the update time of the collected content, and the determined reception time, the content list name and its list URL are recorded in the reception setting recording unit 520 as reception settings.

Next, the receiving operation of the cast site list, the content list, and the content in the content receiving device 50 according to the present embodiment will be described in detail with reference to FIGS.
FIG. 6 is a sequence chart for explaining a content receiving operation according to the embodiment of the content receiving apparatus according to the present invention, and FIG. 7 explains a cast site list distribution operation in the cast site server shown in FIG. FIG. 8 is a diagram showing a display example of a cast site list and a content list in the embodiment of the content receiving apparatus according to the present invention, and FIG. 9 is a diagram of the content list in the content list server shown in FIG. It is a flowchart explaining a delivery operation | movement.

  Referring to FIG. 6, an access point such as a wireless LAN called a hot spot, or the network 10 such as the Internet and the content receiving device 50 are connected at home or the like, and a cast site list acquisition instruction is input by the user from the operation unit 54. Is performed (step A1), the data management unit 56 transmits a cast site list request to the cast site server 20 by the transmission / reception unit 51 (step A2). The cast site list request is a request for requesting distribution of the cast site list stored in the cast site list recording unit 21 of the cast site server 20, and an address (hereinafter, referred to as the cast site list) on the network 10. The request header describes that it corresponds to the cast site list described by OPML, that is, is OPML compatible. The list URL may be input from the operation unit 54 by the user or may be set in advance.

  When the transmission / reception unit 24 of the cast site server 20 receives the cast site list request from the content receiving device 50, the request response unit 23 sends the cast site list requested by the cast site list request from the cast site list recording unit 21. The read cast site list is transmitted to the content receiving device 50 via the network 10 by the transmission / reception unit 24 (step A3).

  Referring to FIG. 7, the request response unit 23 monitors reception of a request by the transmission / reception unit 24 (step B1). When the request is received by the transmission / reception unit 24, the received request is transmitted to the cast site list. It is determined whether or not the request is a request, that is, whether or not it is described in the request header that it is compatible with OPML (step B2). If it is determined in step B2 that the request is a cast site list request, the operation of step A3 described above is performed. If it is determined in step B2 that the request is not a cast site list request, the request is sent from a Web browser that supports HTML. It recognizes that it is a request, reads the guidance page created using HTML from the guidance information recording unit 22, and transmits the read guidance page via the network 10 by the transmission / reception unit 24 (step B3). Thereby, even when there is a request from a browser that does not support OPML, it is possible to distribute a guide page that can be browsed by a browser that does not support OPML. It is possible to promote recognition of the cast site list by distributing a guide page for notifying that it is an address for distributing the described cast site list.

  When the cast site list from the cast site server 20 is received by the transmission / reception unit 51 of the content reception device 50, the data management unit 56 causes the cast site list recording unit 521 to record and receive the received cast site list. In the cast site list, the start tag <title> indicating that the cast site list name is described as an element and the start tag <outline text = ・ ・ indicating that the group name of the content list is described as an attribute > ・ ・ And the empty element tag <outline text = ・ ・> ・ ・ indicating that the content list name is described as an attribute identifies the cast site list name, group name, and content list name Then, as shown in FIG. 8A, the specified cast site list name, group name and container The name list name is displayed on the display unit 53 (step A4).

  Next, the cursor 60 is moved by the operation unit 54, a content list to be acquired is selected from the content list names displayed on the display unit 53, and a content list acquisition instruction input for instructing acquisition of the selected content list is performed. When the operation is performed from the operation unit 54 (step A5), the data management unit 56 transmits a content list request to the content list server 30 by the transmission / reception unit 51 (step A6). The content list request is a request for requesting distribution of a desired content list stored in the content list recording unit 31 of the content list server 30, and is described as an attribute of an empty element tag <outline /> in the cast site list. The request header describes that it corresponds to the content list described by RSS, that is, is RSS compatible.

  When the content list request from the content receiving device 50 is received by the transmission / reception unit 34 of the content list server 30, the request response unit 33 reads the content list requested by the content list request from the content list recording unit 31 and reads the content list. The content list is transmitted to the content receiving device 50 via the network 10 by the transmission / reception unit 34 (step A7).

  Referring to FIG. 9, the request response unit 33 monitors the reception of the request by the transmission / reception unit 34 (step C1), and when the request is received by the transmission / reception unit 34, the received request is a content list request. Whether or not it is described in the request header as being RSS-compatible (step C2). If it is determined in step C2 that the request is a content list request, the operation of step A7 described above is performed. If it is determined in step C2 that the request is not a content list request, a request from a Web browser that supports HTML is used. It recognizes that there is, and reads the guidance page created using HTML from the guidance information recording unit 32, and transmits the read guidance page via the network 10 by the transmission / reception unit 34 (step C3). Thereby, even when there is a request from a browser that does not support RSS, a guidance page that can be viewed by a browser that does not support RSS can be distributed. By distributing a guide page for notifying that the address is for distributing the described content list, recognition of the content list can be promoted.

  When the content list from the content list server 30 is received by the transmission / reception unit 51 of the content reception device 50, the data management unit 56 causes the content list recording unit 522 to record the received content list and the received content list. In FIG. 8, the content name is identified by referring to the start tag <title> indicating that the content name is described as an element, and the identified content name is displayed on the display unit 53 as shown in FIG. (Step A8).

  Next, the cursor 60 is moved by the operation unit 54, a content list to be acquired is selected from the content names displayed on the display unit 53, and a content acquisition instruction input for instructing acquisition of the selected content is input to the operation unit 54. (Step A9), the data management unit 56 transmits a content request to the content server 40 by the transmission / reception unit 51 (Step A10). The content request is a request for requesting distribution of desired content stored in the content recording unit 41 of the content server 40, and is described as an attribute of an empty element tag <enclosure url = "...>" in the content list. This is performed based on the existing data URL.

  When the content request from the content receiving device 50 is received by the transmission / reception unit 43 of the content server 40, the request response unit 42 reads the content requested by the content request from the content recording unit 41, and transmits the read content to the transmission / reception unit 43. Is transmitted to the content receiving device 50 via the network 10 (step A11), and when the content from the content server 40 is received by the transmission / reception unit 51 of the content receiving device 50, the data management unit 56 converts the received content into the content Recording is performed in the recording unit 523 (step A12).

Next, the receiving operation that specifies the content list in the content receiving device 50 of the present embodiment will be described in detail with reference to FIG. 10 and FIG.
FIG. 10 is a flowchart for explaining the reception operation of specifying the content list in the present embodiment of the content receiving apparatus according to the present invention, and FIG. 11 is the reception time performed by the reception time estimation unit shown in FIG. It is explanatory drawing for demonstrating specific operation | movement.

  In steps A1 to A12 described above, the operation of individually specifying and acquiring the content has been described. However, the content described in the content list can also be acquired by specifying the content list.

  When the list URL of the content list is input from the operation unit 54 and a content list acquisition instruction is input, the data management unit 56 transmits a content list request based on the list URL to the content list server 30 by the transmission / reception unit 51 (step) D1). Even when the reception setting is recorded in the reception setting recording unit 520 and the content reception device 50 is connectable to the network 10 and the reception time of the reception setting is reached, the reception setting is performed using the timer function. A content list request based on the list URL is transmitted to the content list server 30.

  When the content list from the content list server 30 is received by the transmission / reception unit 51 of the content receiving device 50 (step D2), the data management unit 56 is described as an element of the tag <Channel> and an element of the tag <title>. By referring to the existing content list name, it is determined whether or not a content list with the same name is recorded in the content list recording unit 522 (step D3).

  When a content list having the same name is recorded in the content list recording unit 522 in step D3, the data management unit 56 compares the received content list with the content list recorded in the content list recording unit 522. (Step D4), by referring to the content name described as the element of the tag <item> and the element of the tag <title>, the content list recorded in the content list recording unit 522 in the received content list It is determined whether or not there is new content not described, that is, content newly added by updating (step D5). Instead of comparing the content list received in step D4 with the content list recorded in the content list recording unit 522, the content described in the received content list and the content recording unit 523 are recorded. It is also possible to determine whether there is content newly added by updating by comparing with existing content.

  If there is new content in step D5, the data management unit 56 identifies the new content as the target content (step D6). If a content list with the same name is not recorded in the content list recording unit 522 in step D2, the data management unit 56 specifies all content described in the received content list as target content (step S2). D7).

  Next, the data management unit 56 transmits a content request for requesting distribution of the target content to the content server 40 by the transmission / reception unit 51 (step D8). The content request is a request for requesting distribution of content stored in the content recording unit 41 of the content server 40, and is performed based on the data URL described as an attribute of the empty element tag <enclosure /> in the content list. Is called.

  When the target content from the content server 40 is received by the transmission / reception unit 51 of the content receiving device 50 in response to the content request (step D9), the data management unit 56 records the received target content in the content recording unit 523. (Step D10).

  Next, the data management unit 56 sets whether or not to periodically receive the updated content from the content list in which the received target content is described, and receives and sets the content list in which the received target content is described. As the reception setting recording unit 520, an input for instructing whether or not to newly record is received from the operation unit 54 (step D11), and the content list in which the received target content is described is set as the reception setting in the reception setting recording unit 520. When an input for instructing not to newly record is received from the operation unit 54, the content receiving operation is terminated as it is.

  When receiving an input from the operation unit 54 to instruct to newly record the received content list in which the target content is described in the reception setting recording unit 520 as the reception setting, the data management unit 56 estimates the reception time. The unit 57 is instructed to determine the reception time.

  As shown in FIG. 11, the reception time estimation unit 57 refers to the start tag <pubDate> indicating that the content update time is described as an element, thereby updating the content update time described in the content list. Are extracted and collected (step D12), the reception time is determined by estimating the trend of the update time of the collected content (step D13), and the determined reception time, the content list name and its list URL are received. The setting is recorded in the reception setting recording unit 520 (step D13), and the content reception operation is terminated.

  As a method for determining the reception time in step D13, the update time of the collected content may be averaged. However, in order to reliably receive the updated content, the update time of the collected content is the latest. It is good to comprise so that it may determine at the time which added predetermined time (5 minutes etc.) to the time or the latest time. In addition, since there is a possibility that the content receiving device 50 is in a state where it cannot be connected to the network 10 at the reception time determined in step D13, or there is a margin until the time when the user reproduces the content on a daily basis. It is preferable that the reception time determined in step D13 is displayed on the display unit 53 so that the user can confirm and change the reception time.

  In this embodiment, the reception time is determined when the reception setting is newly recorded in the reception setting recording unit 520. However, the reception time in the reception setting recorded in the reception setting recording unit 520 is determined. It may be determined again at a predetermined timing. Re-determination of the reception time may be performed every predetermined period. At the time of the reception operation next to the reception operation in which no new content exists and the updated content cannot be received in step D5. You may make it do.

  Furthermore, in this embodiment, the reception time is configured to be automatically determined based on the update time of the collected content. However, the reception time is configured to be set by the user and the reception time set by the user. The content receiving operation may be performed at any of the received time automatically determined based on the update time of the collected content.

  As described above, according to the present embodiment, the reception time estimation unit 57 determines the reception time for receiving content by estimating the trend of the update time described in the content list. The reception time and the address of the content list published on the network are recorded as reception settings in the reception setting recording unit 520, and the data management unit 56 uses the transmission / reception unit 51 to record the address of the content list at the recorded reception time. By sending a content list request based on, the content list is received, the updated content is identified based on the received content list, and the content request is sent based on the address described in the content list To receive and record the received content By configuring so as to be recorded in 523, the reception time is determined based on the actual update time when the content is updated in the content list, and the accuracy with which the updated content can be received at the earliest possible timing is improved. There is an effect that the received content can be received at an appropriate timing.

  Furthermore, according to the present embodiment, the reception time estimation unit 57 is configured to determine the time after the latest update time described in the content list as the reception time, whereby the updated content is more There is an effect that it can be reliably received.

  Furthermore, according to the present embodiment, when the updated time cannot be identified by the reception time estimation unit 57, the trend of the update time described in the next received content list is estimated, When the content update time is changed in the content list because the reception time can be changed according to the content update content in the content list by reconfiguring the reception time to receive the content. In addition, there is an effect that the updated content can be reliably received.

  Note that the present invention is not limited to the above-described embodiments, and it is obvious that the embodiments can be appropriately changed within the scope of the technical idea of the present invention. In addition, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to a suitable number, position, shape, and the like in practicing the present invention. In each figure, the same numerals are given to the same component.

1 is a system configuration diagram showing an example of a distribution system for distributing content to an embodiment of a content receiving apparatus according to the present invention. It is a figure which shows the example of a cast site list recorded on the cast site server shown in FIG. It is a figure which shows the cast site list example recorded on the content list server shown in FIG. It is a block diagram which shows the structure of embodiment of the content receiver which concerns on this invention. It is a figure which shows the example of a reception setting recorded on the reception setting recording part shown in FIG. It is a sequence chart for demonstrating the content reception operation | movement by embodiment of the content receiver which concerns on this invention. It is a flowchart explaining the delivery operation | movement of the cast site list in the cast site server shown in FIG. It is a figure which shows the example of a display of the cast site list and content list in embodiment of the content receiver which concerns on this invention. It is a flowchart explaining the delivery operation | movement of the content list in the content list server shown in FIG. It is a flowchart for demonstrating the receiving operation which specified the content list in this Embodiment of the content receiver which concerns on this invention. It is explanatory drawing for demonstrating the reception time specific operation | movement performed by the reception time estimation part shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Network 20 Cast site server 21 Cast site list recording part 22 Guidance information recording part 23 Request response part 24 Transmission / reception part 30 Content list server 31 Content list recording part 32 Guidance information recording part 33 Request response part 34 Transmission / reception part 40 Content server 41 Content Recording unit 42 Request response unit 43 Transmission / reception unit 50 Content reception device 51 Transmission / reception unit 52 Information recording unit 53 Display unit 54 Operation unit 55 Playback processing unit 56 Data management unit 57 Reception time estimation unit 58 Headphone 60 Cursor 520 Reception setting recording unit 521 Cast Site list recording unit 522 Content list recording unit 523 Content recording unit

Claims (6)

A content receiving device that describes the address and update time of content published on a network and receives the content via the network based on a content list published on the network,
A reception time estimation means for determining a reception time for receiving the content by estimating a trend of the update time described in the content list;
Reception setting recording means for recording the reception time determined by the reception time estimation means and the address of the content list published on the network;
Content list receiving means for receiving the content list by transmitting a content list request based on the address of the content list at the reception time recorded in the reception setting recording means;
Updated content specifying means for specifying the content updated based on the content list received by the content list receiving means;
Content receiving means for receiving the content specified by the updated content specifying means by transmitting a content request based on an address described in the content list;
A content receiving apparatus comprising: content recording means for recording the content received by the content receiving means.   The content reception apparatus according to claim 1, wherein the reception time estimation unit determines a time after the latest update time described in the content list as the reception time.   The reception time estimation means is a trend of the update time described in the content list received next by the content list reception means when the content updated by the update content specification means cannot be specified. The content receiving apparatus according to claim 1, wherein a reception time for receiving the content is re-determined by estimating the content. A content receiving method in which an address and an update time of content published on a network are described, and the content is received via the network based on a content list published on the network,
By estimating a trend of the update time described in the content list, a reception time for receiving the content is determined,
Record the determined reception time and the address of the content list published on the network;
The content list is received by transmitting a content list request based on the address of the content list at the recorded reception time,
Identifying the updated content based on the received content list;
Receiving the identified content by sending a content request based on an address described in the content list;
A content receiving method, wherein the received content is recorded.   5. The content receiving method according to claim 4, wherein a time after the latest update time described in the content list is determined as the reception time.   When the updated content cannot be specified, the reception time for receiving the content is re-determined by estimating the trend of the update time described in the next received content list. The content receiving method according to claim 4 or 5.

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