WO2022234661A1 - Dispositif de sortie de données de diffusion et procédé de sortie de données de diffusion - Google Patents

Dispositif de sortie de données de diffusion et procédé de sortie de données de diffusion Download PDF

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Publication number
WO2022234661A1
WO2022234661A1 PCT/JP2021/017528 JP2021017528W WO2022234661A1 WO 2022234661 A1 WO2022234661 A1 WO 2022234661A1 JP 2021017528 W JP2021017528 W JP 2021017528W WO 2022234661 A1 WO2022234661 A1 WO 2022234661A1
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Prior art keywords
metadata
data
unit
storage
determination
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PCT/JP2021/017528
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English (en)
Japanese (ja)
Inventor
勇哉 西牟田
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三菱電機株式会社
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Priority to JP2022517496A priority Critical patent/JPWO2022234661A1/ja
Priority to PCT/JP2021/017528 priority patent/WO2022234661A1/fr
Publication of WO2022234661A1 publication Critical patent/WO2022234661A1/fr

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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]
    • H04N21/40—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
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal

Definitions

  • the present disclosure relates to a broadcast data output device and a broadcast data output method.
  • Patent Document 1 discloses a tuner adapter that outputs broadcast data such as radio and television broadcasts, and a host device that holds broadcast information such as a channel list obtained via the Internet. This allows the host device to easily obtain the necessary channel list via the Internet, eliminating the need to perform a time-consuming all-stations scan. Therefore, the user can view the broadcast data in a short period of time.
  • Metadata related to broadcast data is not limited to channel lists, but includes, for example, album art related to music being broadcast, advertisements related to products being broadcast, etc., and the types and amount of communication are enormous.
  • a broadcast data output device has been developed that superimposes metadata such as album art related to music being broadcast on broadcast data and provides the metadata to the user.
  • acquisition of metadata may be delayed depending on the communication environment and the amount of metadata communication. If the acquisition of metadata is delayed, it will take time to superimpose the metadata on the broadcast data and provide it, which may reduce the user's convenience.
  • the present disclosure has been made to solve the above-mentioned problems, and aims to acquire metadata at high speed by streamlining the acquisition of metadata via the Internet.
  • a broadcast data output device includes a tuner unit that generates broadcast data from broadcast waves, a communication unit that acquires metadata related to broadcast data via the Internet, and a first metadata acquisition request.
  • the first metadata and the file information of the first metadata are stored in the storage unit storing the storage data in which the metadata acquired via the communication unit and the file information of the metadata are associated with each other;
  • a first determination is made as to whether or not the associated first storage data is stored, and if it is determined in the first determination that the first storage data is stored in the storage unit, a first a determination unit that refers to at least one of the file information of the metadata and the file information of the first storage data and makes a second determination as to whether or not to acquire the first metadata through the communication unit;
  • the broadcast data output method includes the steps of generating broadcast data from broadcast waves, acquiring metadata related to the broadcast data via the Internet, acquiring the acquired metadata, and file information of the metadata. and storing the stored data associated with the first metadata in which the first metadata and the file information of the first metadata are associated when an acquisition request for the first metadata is received. making a first determination as to whether or not the stored data is stored; and if it is determined in the first determination that the first stored data is stored, the file information of the first metadata and the first making a second determination as to whether or not to acquire the first metadata by referring to at least one of the file information of the stored data; and determining whether the first stored data is not stored in the first determination. or if it is determined in the second determination to obtain the first metadata, obtaining the first metadata over the Internet; If it is determined not to acquire the first stored data, and the step of superimposing the first metadata or the first stored data on the broadcast data and outputting it.
  • metadata acquisition via the Internet can be made more efficient, and metadata can be acquired at a higher speed.
  • FIG. 1 is a block diagram showing a broadcast data output device according to Embodiment 1;
  • FIG. 4 is a diagram showing part of a correspondence table held in a storage unit according to Embodiment 1;
  • FIG. 2 is a block diagram showing a hardware configuration example of the broadcast data output device according to Embodiment 1;
  • FIG. 4 is a flow chart showing a broadcast data output method according to Embodiment 1;
  • 4 is a flow chart showing processing operations of steps S400 to S700 of Embodiment 1.
  • FIG. 4 is a diagram showing part of a correspondence table held in a storage unit according to Embodiment 1;
  • FIG. 10 is a flow chart showing processing operations of steps S400 to S700 of Embodiment 2.
  • FIG. 10 is a diagram showing part of a correspondence table held in a storage unit according to Embodiment 2; 10 is a flow chart showing processing operations of steps S500 and S600 of Embodiment 2.
  • FIG. FIG. 10 is a diagram showing part of a correspondence table held in a storage unit according to the second embodiment;
  • FIG. 10 is a flow chart showing processing operations of steps S400, S500, and S700 of Embodiment 3.
  • FIG. FIG. 13 is a flow chart showing the processing operation of step S500 of Embodiment 4.
  • FIG. FIG. 20 is a diagram showing metadata compared in step S542 of Embodiment 4;
  • FIG. 13 is a flow chart showing the processing operation of step S600 of Embodiment 5.
  • FIG. 1 is a block diagram showing a broadcast data output device 1 according to Embodiment 1.
  • the broadcast data output device 1 includes a tuner unit 2 that generates broadcast data from broadcast waves, a query generation unit 3 that generates a query for acquiring metadata about broadcast data in a communication unit 4, and a broadcast data via the Internet 10.
  • Metadata is acquired through a communication unit 4 that acquires metadata about data, a storage unit 5 that stores stored data in which the acquired metadata and file information of the metadata are associated, and the communication unit 4.
  • Metadata is data obtained from the Internet 10 via the communication unit 4 .
  • the stored data is metadata that has been acquired from the Internet 10 via the communication unit 4 in the past and that has been stored in the storage unit 5 in association with the metadata and the file information of the metadata.
  • Metadata related to broadcast data is information related to the selected broadcasting station 9 or broadcasting program. Advertisements related to products and services in
  • the tuner unit 2 receives airwaves from the broadcasting station 9 by, for example, an antenna (not shown) and generates broadcast data from the airwaves of the selected broadcasting station 9 . Specifically, the tuner unit 2 decodes the broadcast radio wave of the selected broadcasting station 9 and analyzes the packet resulting from the decoding process to generate broadcast data. Broadcast data generated by the tuner unit 2 is, for example, broadcast audio and broadcast video of radio broadcasting, television broadcasting, and the like. One or more tuner units 2 may be provided, and a plurality of them may be provided.
  • the query generation unit 3 generates a query for acquiring metadata about broadcast data in the communication unit 4 .
  • the query generation unit 3 acquires the frequency of the airwaves from the tuner unit 2 and generates a query based on the acquired frequency of the airwaves.
  • the query generation unit 3 may hold in advance an information list such as country codes and broadcast wave frequencies, and may generate a query based on the information list.
  • the communication unit 4 performs data communication via the Internet 10.
  • the communication unit 4 performs data communication for acquiring metadata specified by a query generated by the query generation unit 3 when a request is received from the data processing unit 7 to be described later.
  • the storage unit 5 stores and accumulates data in which the file information of the metadata acquired via the communication unit 4 is associated with the metadata acquired through the communication unit 4 as storage data.
  • the file information is, for example, a file list including address information such as URL, update time, acquisition time, acquisition cycle, identification information, acquisition priority, and storage priority.
  • the file information may be a query and communication quality information. Details of the file information will be described later as appropriate.
  • FIG. 2 is a diagram showing part of the correspondence table held in the storage unit 5 according to the first embodiment.
  • the file information includes, for example, an ID for uniquely identifying the stored data, a query used to obtain the stored data, address information of the stored data, and update time of the stored data, as shown in FIG. .
  • the update time is the update time of the data content.
  • the update time may be obtained from the file list information provided by the provider of the stored data, and the last-modified time (Last-Modified) may be obtained using commands such as wget and curl for the URL of the stored data
  • the determination unit 6 associates the first metadata with the file information of the first metadata.
  • a first determination is made as to whether or not the received first storage data is stored in the storage unit 5 .
  • the first metadata is metadata for which the determination unit 6 is requested to acquire. Further, if the determination unit 6 determines in the first determination that the first storage data is stored in the storage unit 5, at least the file information of the first metadata and the file information of the first storage data By referring to one, a second determination is made as to whether or not to acquire the first metadata via the communication unit 4 . Detailed processing operations of the determination unit 6 will be described later.
  • the data processing unit 7 determines that the first storage data is not stored in the storage unit 5 in the first determination by the determination unit 6, or the first storage data via the communication unit 4 in the second determination. When it is determined to acquire the metadata, the first metadata is acquired via the communication unit 4 . If the determination unit 6 determines in the second determination not to acquire the first metadata through the communication unit 4, the data processing unit 7 acquires the first stored data through the storage unit 5. do.
  • the output unit 8 outputs the first metadata acquired by the data processing unit 7 through the communication unit 4 or the first metadata acquired by the data processing unit 7 through the storage unit 5 to the broadcast data generated by the tuner unit 2 .
  • the first stored data is superimposed and output.
  • the output unit 8 transmits an output signal for outputting broadcast data, metadata, and storage data to a display unit 11 such as a speaker and a video display device.
  • FIG. 3 is a block diagram showing a hardware configuration example of the broadcast data output device 1 according to the first embodiment.
  • the tuner unit 2 , the query generation unit 3 , the communication unit 4 , the storage unit 5 , the determination unit 6 , the data processing unit 7 and the output unit 8 of the broadcast data output device 1 described above can be realized by the processing circuit 12 .
  • Processing circuitry 12 comprises at least one processor 13 and at least one memory 14 .
  • Processing circuitry 12 may include at least one piece of dedicated hardware 15 along with or as an alternative to processor 13 and memory 14 .
  • the tuner unit 2 When the processing circuit 12 includes the processor 13 and the memory 14, the tuner unit 2, the query generation unit 3, the communication unit 4, the storage unit 5, the determination unit 6, the data processing unit 7, and the output unit 8 are software, firmware, or It is realized by a combination of software and firmware. At least one of software and firmware is written as a program. The program is stored in memory 14 . The processor 13 reads and executes programs stored in the memory 14 .
  • the processor 13 is also called a CPU (Central Processing Unit), processing unit, arithmetic unit, microprocessor, microcomputer, DSP (Digital Signal Processor).
  • the memory 14 is, for example, non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), etc. Configured.
  • the processing circuit 12 may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof.
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the functions of the tuner unit 2, the query generation unit 3, the communication unit 4, the storage unit 5, the determination unit 6, the data processing unit 7, and the output unit 8 are partly realized by dedicated hardware, and partly may be implemented by software or firmware.
  • the processing circuit 12 in the broadcast data output device 1 can implement the functions described above by hardware, software, firmware, or a combination thereof.
  • FIG. 4 is a flow chart showing the broadcast data output method according to the first embodiment.
  • the broadcast data output device 1 executes the processing operations of steps S100 to S800 below.
  • the tuner unit 2 generates broadcast data from broadcast waves received from the broadcasting station 9 (S100).
  • the query generation unit 3 generates a query for acquiring metadata related to broadcast data based on broadcast waves or an information list previously held inside the query generation unit 3 (S200).
  • the determination unit 6 when there is an acquisition request for the first metadata specified by the query generated by the query generation unit 3, the determination unit 6 generates the first metadata and the file information of the first metadata. is stored in the storage unit 5 (S300). That is, the determination unit 6 acquires the first metadata specified by the query in the past, and stores the first metadata and the file information of the first metadata as the first storage data associated with each other. It is determined whether or not it is stored in the unit 5 .
  • the determination unit 6 determines in the first determination that the first storage data is stored in the storage unit 5 (YES in S300)
  • this is the case where the first storage data associated with the same address information as the address information of the first metadata is stored in the storage unit 5 .
  • a second determination as to whether or not to acquire the first metadata via the communication unit 4 (S400). The details of the second determination in step S400 will be described later.
  • the data processing unit 7 acquires the first metadata from the Internet 10 via the communication unit 4 (S500).
  • the data processing section 7 may simultaneously acquire the file information of the first metadata via the communication section 4 .
  • the data processing unit 7 stores, in the storage unit 5, first storage data in which the first metadata acquired via the communication unit 4 and the file information of the first metadata are associated with each other ( S600).
  • the data processing unit 7 stores the first metadata through the storage unit 5. (S700).
  • the first metadata acquired by the data processing unit 7 via the communication unit 4 in step S500 or the first stored data acquired by the data processing unit 7 via the storage unit 5 in step S700 is It is sent to the output unit 8 .
  • the output unit 8 superimposes the transmitted first metadata or first storage data on the broadcast data generated by the tuner unit 2 and outputs the result (S800).
  • FIG. 5 is a flow chart showing the processing operations of steps S400 to S700 of the first embodiment.
  • FIG. 6 is a diagram showing part of the correspondence table held in the storage unit 5 according to the first embodiment.
  • the determination unit 6 refers to at least one of the file information of the first metadata and the file information of the first stored data, and acquires the first metadata via the communication unit 4.
  • a second determination is made as to whether or not The file information of the metadata in this embodiment includes the update time of the data content of the metadata, and the file information of the storage data includes the update time of the data content of the storage data.
  • the second determination (S400) in the present embodiment refers to the update time included in the file information of the first metadata and the update time included in the file information of the first storage data, respectively. It is characterized by determining whether or not to acquire the first metadata via the communication unit 4 .
  • Step S400 comprises processing operations of steps S411 to S413 below.
  • the determination unit 6 acquires the update time t_c included in the file information of the first metadata via the communication unit 4 (S411).
  • the update time t_c is the update time of the data content of the first metadata when the first metadata is acquired via the communication unit 4 .
  • the determination unit 6 searches the update time t_b included in the file information of the first stored data via the storage unit 5 (S412).
  • the update time t_b is the update time of the data content of the first stored data when the first stored data is acquired via the communication unit 4 .
  • Step S411 and step S412 may be performed simultaneously.
  • FIG. 6A is an example showing part of the correspondence table held in the storage unit 5 in step S412.
  • FIG. 6A is a correspondence table consisting of an ID for uniquely identifying stored data, a query used to obtain the stored data, address information of the stored data, and update time t_b of the stored data. be.
  • the first metadata specified by the query is "yyy.yyy.yyy.yyy/bbbbb.png”
  • the update time t_b of ID 2 2020/12/31-23: 00:00 is obtained.
  • the determination unit 6 determines the update time t_c of the first metadata acquired through the communication unit 4 in step S411 and the update time t_b of the first storage data acquired through the storage unit 5 in step S412. are compared to determine whether the update time t_c is newer than the update time t_b (S413). That is, it is determined whether or not the data content of the first metadata on the Internet 10 has been updated since it was acquired via the communication unit 4 in the past and stored in the storage unit 5 as the first storage data.
  • update time t_c is newer than update time t_b (YES in S413). That is, this is the case where the first metadata on the Internet 10 has been updated since it was acquired via the communication unit 4 and stored in the storage unit 5 as the first storage data in the past.
  • the data processing unit 7 acquires the first metadata and the file information including the update time t_c of the first metadata via the communication unit 4 (S500).
  • YES in step S413 is, for example, the case where the update time t_c is 2021/01/01/00:00:00.
  • the storage unit 5 stores the first storage data in which the first metadata acquired via the communication unit 4 and the file information including the update time t_c of the first metadata are associated with each other.
  • FIG. 6B is an example showing part of the correspondence table held in the storage unit 5 in step S600.
  • the update time t_b associated with ID 2 is updated to 2021/01/01/00:00:00 and stored.
  • the determination unit 6 determines that the update time t_c is not newer than the update time t_b (NO in S413) will be described. That is, this is the case where the first metadata on the Internet 10 has not been updated since it was acquired via the communication unit 4 and stored in the storage unit 5 as the first storage data in the past. That is, update time t_c is the same as update time t_b. In this case, the data processing unit 7 performs the processing operation of step S700 described above.
  • the determining unit 6 when there is an acquisition request for the first metadata, the determining unit 6 outputs the first metadata and the first metadata.
  • a first determination is made as to whether or not the first storage data associated with the file information of is stored in the storage unit 5 .
  • the determination unit 6 refers to at least one of the file information of the first metadata and the file information of the first storage data. Then, a second determination is made as to whether or not to acquire the first metadata via the communication unit 4 .
  • the data processing unit 7 determines in the first determination that the first storage data is not stored in the storage unit 5, or in the second determination, the data processing unit 7 receives the first metadata through the communication unit 4. is determined to be acquired, the first metadata is acquired through the communication unit 4, and if it is determined not to acquire the first metadata through the communication unit 4 in the second determination, the storage unit 5 to obtain the first stored data.
  • the data processing unit 7 receives the first metadata through the communication unit 4. is determined to be acquired, the first metadata is acquired through the communication unit 4, and if it is determined not to acquire the first metadata through the communication unit 4 in the second determination, the storage unit 5 to obtain the first stored data.
  • the data processing unit 7 performs to obtain the first metadata.
  • the determination unit 6 determines in the second determination that the update time t_c of the first metadata is newer than the update time t_b of the first stored data
  • the data processing unit 7 performs to obtain the first stored data.
  • step S500 the data processing unit 7 acquires the first metadata through the communication unit 4, and in step S600, the first metadata acquired through the communication unit 4 and the file information of the first metadata.
  • step S600 the first metadata acquired through the communication unit 4 and the file information of the first metadata.
  • the present invention is not limited to this.
  • the data processing unit 7 does not necessarily transfer the first storage data in which the first metadata acquired via the communication unit 4 in step S500 and the file information of the first metadata are associated to the storage unit 5. No need to memorize.
  • the broadcast data output device 1 according to Embodiment 2 includes a tuner section 2, a query generation section 3, a communication section 4, a storage section 5, a determination section 6, a data processing section 7, and an output section 8, as in the first embodiment. and
  • the invention according to this embodiment differs from the first embodiment in the broadcast data output method.
  • the same reference numerals are assigned to the same configurations as in the first embodiment, and the description thereof is omitted.
  • the file information of the metadata in Embodiment 1 includes the update time t_c of the data content of the metadata, and the file information of the storage data includes the update time t_b of the data content of the storage data.
  • the second determination (S400) in the first embodiment is characterized by determining whether the update time t_c of the first metadata is newer than the update time t_b of the first storage data.
  • File information of metadata and stored data in the present embodiment includes an acquisition time t_a, which is the time of metadata acquired via the communication unit 4, and an acquisition cycle t_i preset according to the type of metadata.
  • the determination unit 6 determines whether or not the time obtained by adding the acquisition cycle t_i to the acquisition time t_a of the first stored data is newer than the current time t_n. .
  • the communication unit 4 acquires the metadata specified by the query generated by the query generation unit 3 and the acquisition time t_a of the metadata.
  • the storage unit 5 stores stored data in which the metadata acquired via the communication unit 4, the query used when acquiring the metadata, and the file information of the metadata are associated with each other.
  • the file information of the stored data includes the acquisition time t_a of the metadata acquired via the communication unit 4 and the acquisition cycle t_i preset according to the type of metadata.
  • the acquisition cycle t_i may be set by identification information that identifies the type of metadata, for example.
  • the acquisition cycle t_i of the identification information SI Information should be set long, and the acquisition cycle t_i of the identification information Slideshow should be set short.
  • the acquisition period t_i is set longer for metadata that is assumed to be updated less frequently, such as the explanation of the broadcasting station 9, and it is assumed that the update frequency for advertisements related to products being broadcast is high.
  • a short acquisition cycle t_i is set for the metadata.
  • FIG. 7 is a flow chart showing the processing operations of steps S400 to S700 of the second embodiment.
  • FIG. 8 is a diagram showing part of the correspondence table held in the storage unit 5 according to the second embodiment.
  • the second determination (S400) refers to at least one of the file information of the first metadata and the file information of the first stored data to acquire the first metadata via the communication unit 4. It is a matter of deciding whether or not to The second determination (S400) of the present embodiment includes processing operations of steps S421 to S424 below.
  • the determination unit 6 acquires the current time t_n (S421).
  • the current time t_n may be obtained, for example, from time data held inside the broadcast data output device 1 or from an external device.
  • the determination unit 6 searches the file information of the first stored data via the storage unit 5. Specifically, the acquisition time t_a and the acquisition cycle t_i of the first stored data are searched (S422). Step S421 and step S422 may be performed simultaneously.
  • FIG. 8A is an example showing part of the correspondence table held in the storage unit 5 in step S422.
  • FIG. 8A shows an ID for uniquely identifying stored data, a query used to acquire the stored data, address information of the stored data, acquisition time t_a of the stored data, and It is a correspondence table consisting of acquisition cycles t_i.
  • the acquisition time t_a of ID 2 is 2020/12/31-23:00:00 and the acquisition A period t_i 00:05:00 is obtained.
  • the determination unit 6 calculates the scheduled update time t_u by adding the acquisition period t_i to the acquisition time t_a of the first stored data acquired in step S422 (S423).
  • the acquisition time t_a 2020/12/31-23:00:00 is updated to 2020/12/31-23:05:00 by adding the acquisition cycle t_i 00:05:00 It is the scheduled time t_u.
  • the determination unit 6 compares the current time t_n obtained in step S421 with the scheduled update time t_u calculated in step S423, and determines whether the scheduled update time t_u is newer than the current time t_n (S424). .
  • the determination unit 6 determines that the scheduled update time t_u is newer than the current time t_n (YES in S424), for example, if the current time t_n is 2020/12/31-23:03:00 in the example of FIG. will be explained.
  • the data processing unit 7 acquires the first stored data via the storage unit 5 (S700).
  • the data processing unit 7 acquires the first metadata acquired via the communication unit 4 and the file information including the acquisition time t_a of the first metadata (S500).
  • the data processing unit 7 stores the first stored data in which the first metadata acquired via the communication unit 4 is associated with the file information including the acquisition time t_a and the acquisition period t_i of the first metadata. is stored in the storage unit 5.
  • FIG. 8B is an example showing part of the correspondence table held in the storage unit 5 in step S600 described above. Acquisition time t_a associated with ID 2 is updated to 2021/01/01/00:00:00 and stored. Other broadcast data output methods are the same as the broadcast data output method in the above-described Embodiment 1, and therefore are omitted.
  • the broadcast data output device 1 and the broadcast data output method according to the present embodiment have the first metadata and the first A first determination is made as to whether or not the first storage data associated with the file information of the metadata is stored in the storage unit 5 .
  • the determination unit 6 refers to at least one of the file information of the first metadata and the file information of the first storage data.
  • a second determination is made as to whether or not to acquire the first metadata via the communication unit 4 .
  • the data processing unit 7 determines in the first determination that the first storage data is not stored in the storage unit 5, or in the second determination, the data processing unit 7 receives the first metadata through the communication unit 4.
  • the first metadata is acquired through the communication unit 4, and if it is determined not to acquire the first metadata through the communication unit 4 in the second determination, the storage unit 5 to obtain the first stored data.
  • the storage unit 5 to obtain the first stored data.
  • the determination unit 6 determines in the second determination that the scheduled update time t_u obtained by adding the acquisition cycle t_i to the acquisition time t_a of the first stored data is newer than the current time t_n
  • the first storage data is acquired via the storage unit 5 .
  • the data processing unit 7 determines in the second determination by the determination unit 6 that the scheduled update time t_u obtained by adding the acquisition period t_i to the acquisition time t_a of the first stored data is not newer than the current time t_n.
  • the first metadata is acquired via the communication unit 4 .
  • the storage unit 5 may calculate the scheduled update time t_u and store it as file information.
  • the determination unit 6 searches the scheduled update time t_u via the storage unit 5 in step S422, omits the processing operation of step S423, and executes the processing operation of step S423.
  • the storage unit 5 may delete the stored data. For example, it is preferable to compare the scheduled update time t_u of the stored data with the current time t_n when a preset time has elapsed. As a result, it is possible to prevent the capacity of the storage unit 5 from being squeezed.
  • the metadata and the file information of the stored data may further include identification information that identifies the type of metadata.
  • the processing operation shown in FIG. 9 may be performed in order to set an appropriate acquisition cycle t_i for the stored data to be stored in the storage unit 5.
  • FIG. FIG. 9 is a flow chart showing the processing operations of steps S500 and S600 of the second embodiment. Step S500 includes step S521 below, and step S600 includes processing operations of steps S621 to S623 below.
  • the data processing unit 7 acquires the first metadata and the file information including the acquisition time t_a of the first metadata and the identification information via the communication unit 4 (S521).
  • the data processing unit 7 searches through the storage unit 5 whether stored data associated with the same identification information as the identification information of the first metadata acquired in step S521 is stored (S621).
  • the data processing unit 7 acquires the same acquisition cycle t_i as the identification information of the stored data. is set as the acquisition cycle t_i of the first metadata and stored (S622).
  • FIG. 10A and 10B are diagrams showing part of the correspondence table held in the storage unit 5 according to the second embodiment.
  • FIG. 10A shows a part of the correspondence table in step S621, and FIG. An example is shown.
  • FIG. 10 shows an ID for uniquely identifying stored data, a query used when acquiring the stored data, address information of the stored data, acquisition time t_a of the stored data, acquisition period t_i of the stored data, It is a correspondence table consisting of identification information of the stored data.
  • FIG. 10 shows an ID for uniquely identifying stored data, a query used when acquiring the stored data, address information of the stored data, acquisition time t_a of the stored data, acquisition period t_i of the stored data, It is a correspondence table consisting of identification information of the stored data.
  • FIG. 10 shows an ID for uniquely identifying stored data, a query used when acquiring the stored data, address information of the stored data, acquisition time t_a of the stored data, acquisition period t_i of the stored data, It is
  • the first metadata "vvv.vvvv.vvvvvv/ddddd.xml" is acquired via the communication unit 4, ID N+1 is given, and its identification information SI Information is Assume that the data is stored in the storage unit 5 .
  • the data processing unit 7 searches for stored data associated with ID N+1 and the same identification information SI Information (S621). Then, as shown in FIG. 10B, the data processing unit 7 refers to the acquisition cycle 24:00:00 of ID 1, which is the identification information SI Information, through the storage unit 5, and acquires ID (N+1). A period of 24:00:00 is set (S622).
  • the data processing unit 7 stores the acquired data set in advance as the initial value.
  • a period t_d is set (S623).
  • the data processing unit 7 when the data processing unit 7 stores storage data associated with the same identification information as the identification information of the first metadata acquired via the communication unit 4, the data processing unit 7 stores the first metadata. may be stored as the acquisition cycle t_i of the first metadata. Thereby, the storage unit 5 can set an appropriate acquisition cycle t_i for newly stored data.
  • Broadcast data output device 1 in Embodiment 3 includes tuner unit 2, query generation unit 3, communication unit 4, storage unit 5, determination unit 6, data processing unit 7, and output unit 8, as in Embodiment 1. and
  • the invention according to this embodiment differs from the first embodiment in the broadcast data output method.
  • the same reference numerals are assigned to the same configurations as in the first embodiment, and the description thereof is omitted.
  • the metadata file information includes communication quality information when acquiring the first metadata
  • the second determination (S400) is the communication quality information. is equal to or greater than a preset threshold value.
  • FIG. 11 is a flow chart showing the processing operations of steps S400, S500, and S700 of the third embodiment.
  • the second determination (S400) refers to at least one of the file information of the first metadata and the file information of the first stored data to acquire the first metadata via the communication unit 4. or not.
  • the second determination (S400) of this embodiment includes the processing operations of steps S431 and S432 below.
  • the determination unit 6 acquires communication quality information when acquiring the first metadata (S431).
  • the communication quality information at the time of acquiring the first metadata does not have to be strictly at the time of acquiring the first metadata, and is, for example, the data transfer rate (bit rate; bps) in the immediate vicinity of the communication unit 4.
  • the communication quality information at the time of obtaining the first metadata is the radio wave intensity of the most recent broadcast wave received by the tuner unit 2, CNR (Carrier to Noise Ratio) or SNR (Signal) estimated from information obtained during demodulation. to Noise Ratio), and packet error rate.
  • the broadcast data output device 1 when the broadcast data output device 1 is installed in a car navigation system, the broadcast data output device 1 may hold in advance communication quality information linked to map information provided in the car navigation system. Accordingly, the determination unit 6 may acquire the communication quality information from the current position information acquired from the car navigation system.
  • the determination unit 6 determines whether or not the communication quality information is equal to or greater than a preset threshold (S432).
  • a preset threshold for example, a value that enables data communication via the communication unit 4 may be appropriately set.
  • the data processing unit 7 performs the processing operation of step S500 described above.
  • the data processing unit 7 determines that the communication quality information is less than the preset threshold value (NO in S432), it executes the processing operation of step S700 described above.
  • the broadcast data output device 1 and the broadcast data output method according to the present embodiment have the first metadata and the first A first determination is made as to whether or not the first storage data associated with the file information of the metadata is stored in the storage unit 5 .
  • the determination unit 6 refers to at least one of the file information of the first metadata and the file information of the first storage data.
  • a second determination is made as to whether or not to acquire the first metadata via the communication unit 4 .
  • the data processing unit 7 determines in the first determination that the first storage data is not stored in the storage unit 5, or in the second determination, the data processing unit 7 receives the first metadata through the communication unit 4.
  • the first metadata is acquired through the communication unit 4, and if it is determined not to acquire the first metadata through the communication unit 4 in the second determination, the storage unit 5 to obtain the first stored data.
  • the storage unit 5 to obtain the first stored data.
  • the broadcast data output device 1 installed in a mobile object such as an automobile may delay acquisition of the first metadata depending on the communication environment. Therefore, when the determination unit 6 determines in the second determination that the communication quality information at the time of acquiring the first metadata is equal to or higher than a preset threshold value, the data processing unit 7 to obtain the first metadata. On the other hand, when the determination unit 6 determines in the second determination that the communication quality information at the time of acquiring the first metadata is less than the preset threshold value, the data processing unit 7 stores data via the storage unit 5. to obtain the first stored data. As a result, it is possible to suppress the metadata to be acquired in an environment where the communication quality is poor. Therefore, by making the metadata acquisition via the Internet 10 more efficient, the metadata can be acquired at high speed.
  • Broadcast data output device 1 in Embodiment 4 includes tuner unit 2, query generation unit 3, communication unit 4, storage unit 5, determination unit 6, data processing unit 7, and output unit 8, as in Embodiment 1. and
  • the invention according to this embodiment differs from the first embodiment in the broadcast data output method.
  • the same reference numerals are assigned to the same configurations as in the first embodiment, and the description thereof is omitted.
  • metadata file information includes an acquisition priority set in advance according to the type of metadata. Then, in step S500, when there are multiple determinations to acquire metadata via the communication unit 4 within a time period shorter than the preset time, the data processing unit 7 acquires metadata in descending order of acquisition priority. characterized by
  • step S500 in this embodiment will be described using FIG. FIG. 12 is a flow chart showing the processing operation of step S500 of the fourth embodiment.
  • Step S500 of this embodiment includes processing operations of steps S541 to S544 below.
  • the determination unit 6 determines whether multiple determinations (YES in S400) to acquire metadata via the communication unit 4 have been made in a time period shorter than the preset time (S541).
  • the determination unit 6 compares acquisition priorities of the multiple metadata. (S542).
  • the acquisition priority is preset according to the type of metadata. For example, the acquisition priority may be set in advance by identification information of metadata.
  • the data processing unit 7 acquires the metadata via the communication unit 4 in order from the metadata with the highest acquisition priority (S543).
  • FIG. 13 is a diagram showing metadata compared in step S542 of the fourth embodiment.
  • the acquisition priority is set in advance to a numerical value in the range of 0 to 255, for example, according to the identification information. In this example, the smaller the numerical value of the acquisition priority, the higher the acquisition priority.
  • the determination unit 6 compares the acquisition priority of each metadata. In FIG. 13, the acquisition priority is higher in the order of ID 3, ID 2, and ID 1. Therefore, the data processing unit 7 acquires metadata via the communication unit 4 in order of ID 3, ID 2, and ID 1 (S543).
  • the data processing unit 7 determines that there are no acquisition requests for a plurality of metadata (NO in S541), the data processing unit 7 determines to acquire metadata via the communication unit 4 in a time shorter than the preset time. is 1, the metadata is acquired via the communication unit 4 (S544).
  • Other broadcast data output methods are the same as the broadcast data output method in the above-described Embodiment 1, and therefore are omitted.
  • the broadcast data output device 1 and the broadcast data output method according to the present embodiment have the first metadata and the first A first determination is made as to whether or not the first storage data associated with the file information of the metadata is stored in the storage unit 5 .
  • the determination unit 6 refers to at least one of the file information of the first metadata and the file information of the first storage data.
  • a second determination is made as to whether or not to acquire the first metadata via the communication unit 4 .
  • the data processing unit 7 determines in the first determination that the first storage data is not stored in the storage unit 5, or in the second determination, the data processing unit 7 receives the first metadata through the communication unit 4.
  • the first metadata is acquired through the communication unit 4, and if it is determined not to acquire the first metadata through the communication unit 4 in the second determination, the storage unit 5 to obtain the first stored data.
  • the storage unit 5 to obtain the first stored data.
  • the broadcast data output device 1 of this embodiment is effective when a plurality of tuner units 2 are provided.
  • a certain tuner unit 2 generates broadcast data of a selected broadcasting station 9 and the judgment unit 6 judges to acquire an image of a singer of music being broadcast through the communication unit 4 .
  • another tuner section 2 performs a channel search for a counterprogram, and the decision section 6 decides to acquire a channel list via the communication section 4 . If the channel list is obtained first via the communication unit 4, the amount of communication for the channel list is relatively large, so there is a possibility that the acquisition of the image of the singer of the music being broadcast may be delayed. Therefore, the timing of superimposing metadata on broadcast data may be delayed.
  • the acquisition priority are obtained via the communication unit 4 in descending order of metadata.
  • the acquisition priority of channel list identification information (SI Information) is set to be low
  • the acquisition priority of singer image identification information (SlideShow) to be directly presented to the user is set to be high.
  • the broadcast data output device 1 can acquire metadata at high speed by streamlining acquisition of metadata via the Internet 10 .
  • a broadcast data output device 1 according to Embodiment 5 includes a tuner unit 2, a query generation unit 3, a communication unit 4, a storage unit 5, a determination unit 6, a data processing unit 7, and an output unit 8, as in Embodiment 1. and
  • the invention according to this embodiment differs from the first embodiment in the broadcast data output method.
  • the same reference numerals are assigned to the same configurations as in the first embodiment, and the description thereof is omitted.
  • the file information of stored data includes a preset storage priority according to the type of metadata.
  • the data processing unit 7 is characterized by deleting stored data stored in the storage unit 5 or selecting stored data to be stored.
  • the storage priority may be set in advance by, for example, the identification information of the metadata, and it is preferable to set a higher priority for an item whose update frequency is lower or for an item whose frequency of output by the output unit 8 is higher.
  • Step S600 in the present embodiment will be described using FIG.
  • FIG. 14 is a flow chart showing the processing operation of step S600 of the fifth embodiment.
  • Step S600 of this embodiment includes processing operations of steps S651 to S653.
  • the determination unit 6 determines whether the capacity of the storage unit 5 is less than a preset threshold (S651).
  • the data processing unit 7 stores the first storage data in the storage unit 5 (S652). .
  • the data processing unit 7 stores the stored data in the storage unit 5 in descending order of storage priority. Delete until the capacity becomes less than the preset capacity (S653). Then, the data processing unit 7 stores the first metadata as first storage data (S662).
  • the broadcast data output device 1 and the broadcast data output method according to the present embodiment have the first metadata and the first A first determination is made as to whether or not the first storage data associated with the file information of the metadata is stored in the storage unit 5 .
  • the determination unit 6 refers to at least one of the file information of the first metadata and the file information of the first storage data.
  • a second determination is made as to whether or not to acquire the first metadata via the communication unit 4 .
  • the data processing unit 7 determines in the first determination that the first storage data is not stored in the storage unit 5, or in the second determination, the data processing unit 7 receives the first metadata through the communication unit 4.
  • the first metadata is acquired through the communication unit 4, and if it is determined not to acquire the first metadata through the communication unit 4 in the second determination, the storage unit 5 to obtain the first stored data.
  • the storage unit 5 to obtain the first stored data.
  • the more data stored in the storage unit 5 the more it is possible to reduce the number of times metadata is acquired via the communication unit 4 and the amount of communication. Metadata can be retrieved faster.
  • the broadcast data output device 1 and the broadcast data output method of the present embodiment when the capacity of the storage unit 5 is equal to or greater than a preset threshold value, stored data is stored in the storage unit 5 in descending order of storage priority. By deleting until the capacity becomes less than the preset threshold value, it is possible to suppress the capacity of the storage unit 5 from being squeezed.
  • the data processing unit 7 may not store metadata whose storage priority is equal to or less than a preset threshold.
  • the storage priority may be associated with the acquisition cycle t_i in the second embodiment, and the acquisition cycle t_i of 00:05:00 may be set as the storage priority threshold.
  • the stored data whose acquisition cycle t_i is 00:05:00 or less is not stored. As a result, it is possible to prevent the capacity of the storage unit 5 from being squeezed.
  • each embodiment disclosed in this specification can be freely combined within its scope, and each embodiment can be modified or omitted as appropriate.
  • the determination unit 6 determines that the storage data acquisition time t_a It may be determined whether or not the scheduled update time t_u obtained by adding the acquisition cycle t_i to the current time t_n is newer than the current time t_n (S421 to S424).
  • 1 broadcast data output device 2 tuner section, 3 query generation section, 4 communication section, 5 storage section, 6 judgment section, 7 data processing section, 8 output section, 9 broadcasting station, 10 Internet, 11 display section, 12 processing circuit , 13 processor, 14 memory, 15 hardware

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  • Engineering & Computer Science (AREA)
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  • Databases & Information Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Dans un dispositif de sortie de données de diffusion (1), lorsqu'une demande d'obtention de premières métadonnées est reçue, une unité de détermination (6) effectue une première détermination consistant à déterminer si les premières métadonnées sont stockées dans une unité de stockage (5) en tant que premières données de stockage. Lorsqu'il est déterminé, dans la première détermination, que les premières données de stockage sont stockées, l'unité de détermination (6) effectue une seconde détermination consistant à déterminer s'il faut obtenir les premières métadonnées par l'intermédiaire d'une unité de communication (4) en se référant à au moins un élément d'informations parmi des informations de fichier sur les premières métadonnées et des informations de fichier sur les premières données de stockage. Ceci rend l'acquisition des métadonnées par l'intermédiaire d'Internet (10) plus efficace et permet ainsi d'acquérir rapidement les métadonnées.
PCT/JP2021/017528 2021-05-07 2021-05-07 Dispositif de sortie de données de diffusion et procédé de sortie de données de diffusion WO2022234661A1 (fr)

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Citations (4)

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JP2009027390A (ja) * 2007-07-18 2009-02-05 Sony Corp コンテンツ配信システム、配信サーバ、受信端末及びコンピュータプログラム
JP2012044412A (ja) * 2010-08-18 2012-03-01 Sumitomo Electric Networks Inc コンテンツ受信装置、コンテンツ配信システム、及びプログラム
JP2013048490A (ja) * 2012-12-03 2013-03-07 Ntt Data Corp メタデータ配信システム及びメタデータ配信方法
JP2013535054A (ja) * 2010-06-15 2013-09-09 華為技術有限公司 メタデータファイルを更新する方法、装置、およびシステム

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JP2005352813A (ja) * 2004-06-11 2005-12-22 Matsushita Electric Ind Co Ltd コンテンツ共有システム

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2009027390A (ja) * 2007-07-18 2009-02-05 Sony Corp コンテンツ配信システム、配信サーバ、受信端末及びコンピュータプログラム
JP2013535054A (ja) * 2010-06-15 2013-09-09 華為技術有限公司 メタデータファイルを更新する方法、装置、およびシステム
JP2012044412A (ja) * 2010-08-18 2012-03-01 Sumitomo Electric Networks Inc コンテンツ受信装置、コンテンツ配信システム、及びプログラム
JP2013048490A (ja) * 2012-12-03 2013-03-07 Ntt Data Corp メタデータ配信システム及びメタデータ配信方法

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