WO2003107656A1 - Recepteur de donnees de radiodiffusion et procede de stockage des donnees - Google Patents

Recepteur de donnees de radiodiffusion et procede de stockage des donnees Download PDF

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Publication number
WO2003107656A1
WO2003107656A1 PCT/GB2003/002282 GB0302282W WO03107656A1 WO 2003107656 A1 WO2003107656 A1 WO 2003107656A1 GB 0302282 W GB0302282 W GB 0302282W WO 03107656 A1 WO03107656 A1 WO 03107656A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
bdr
interactive
broadcast
file
Prior art date
Application number
PCT/GB2003/002282
Other languages
English (en)
Inventor
Timothy Sheen
Original Assignee
Pace Micro Technology Plc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pace Micro Technology Plc filed Critical Pace Micro Technology Plc
Priority to AU2003240047A priority Critical patent/AU2003240047A1/en
Publication of WO2003107656A1 publication Critical patent/WO2003107656A1/fr

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Classifications

    • 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
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4348—Demultiplexing of additional data and video streams
    • H04N21/4349—Demultiplexing of additional data and video streams by extracting from data carousels, e.g. extraction of software modules from a DVB carousel
    • 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
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
    • 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
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
    • 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
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4335—Housekeeping operations, e.g. prioritizing content for deletion because of storage space restrictions
    • 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]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/85—Assembly of content; Generation of multimedia applications
    • H04N21/854—Content authoring
    • H04N21/8545—Content authoring for generating interactive applications

Definitions

  • This invention relates to a broadcast data receiver (BDR) and a method of storing data received by and for processing by the same.
  • BDR broadcast data receiver
  • a BDR also known as a Set Top Box.
  • the BDR is provided to receive digital data which is broadcast from a remote location or locations by one or more television or other service broadcasters.
  • the data can be carried to the BDR's at the various locations via cable, satellite and/or terrestrial transmission systems.
  • the received data is received in an encoded form and processed and decoded by the BDR using known decoding integrated circuits and in conformation with International data processing Standards, such as MPEG-2, to provide video, audio and/ or auxiliary data for viewing on a display screen or for listening via speakers.
  • the BDR is provided with a memory means such as a hard disk drive which allows the selective storage of data received by the BDR onto the memory means so as to allow the data to be selected for processing and viewing by the viewer at a time after the receipt of the data by the BDR.
  • the BDR selects the relevant data from the incoming received transport stream which includes data for a whole range of television programmes and services.
  • the data which is selected for storage is in response to the viewer programme selection such that the data required to generate the selected programme is identified and selected.
  • the selected data is conventionally stored in substantially the same format as it is broadcast to and received by the BDR.
  • the digital television audio/video services are often accompanied by interactive applications.
  • the interactive content can be in the form of supplementary information which is selectively viewable alongside a regular television programme.
  • the interactive application can be the sole content of the service, and the application may be unrelated to a particular television programme.
  • the data for such interactive services is often broadcast in a carousel format (i.e., a Digital Storage Media - Command Control (DSM-CC) object carousel in the UK Digital Terrestrial television (DTT) context) .
  • DSM-CC Digital Storage Media - Command Control
  • a carousel format is when data is broadcast as a repeating loop of the same data encapsulated in a data transport stream which is broadcast and received by the BDR. If the transport stream is recorded in the normal manner, a plurality of copies of the same loop of data or substantially similar data would be recorded on the hard disk drive of the BDR. As such, an increased amount of disk space is required by the BDR for storing this data. This is undesirable, expensive and may result in a reduction in the performance of the BDR and/or a reduction in performance of the interactive application with a corresponding television programme.
  • the BDR when data is required by an interactive application, the BDR must wait until the required portion of the carousel is broadcast and then retrieve the interactive data therefrom. As such, the user may be required to wait for pages of text and/or images from the interactive service to load. This is inconvenient for the user and may dissuade the user from using the interactive service.
  • a method of processing data received by a BDR including receiving data from a broadcaster at a remote location, decoding and processing the data to provide video, audio and/or auxiliary data, said broadcast data relating to one or more television programmes and/or interactive service information, at least part of said interactive service information broadcast as a repeating loop of data encapsulated in a data transport stream (carousel format), said BDR having a memory means for the selective storage therein of broadcast data, representing a viewer selection and characterised in that upon a viewer selection, the data relating to a loop of the selected interactive service information is retrieved, as the data storage is performed and stored in a files system in the memory of said BDR.
  • the present invention provides the means to filter the data transport stream, based on one or more pre-defined criteria, into constituent files.
  • the predefined criteria can include one or more different versions of the interactive data over time.
  • the files system includes modules containing data blocks, the data blocks contain packets of data and the packets of data represent the incoming transport streams to the BDR.
  • the packets of data in the incoming data transport streams are stored, processed and allocated into files for storing in memory. This is in contrast to the conventional method where the BDR records and processes the data in the form of transport streams and stores the transport streams.
  • the interactive service information data relates to the one or more selected television programmes which are stored. Further preferably both the interactive service information and the one or more television programmes are broadcast in a carousel format.
  • the memory is in the form of a hard disk drive (HDD) provided in or connected to the BDR.
  • HDD hard disk drive
  • the different versions of the interactive data are saved as separate files within the file system.
  • each new file version of the interactive service data recorded is provided with a time stamp based on the system clock (STC) of the BDR.
  • STC system clock
  • the appropriate file with a corresponding time stamp is identified from the file system and used for playback until the next time stamp is identified.
  • STC system clock
  • any desired point of an interactive service will be located in a file having a time stamp associated therewith. The BDR can therefore quickly identify the desired point in the service by playing back the file version having the relevant time stamp. Thus the viewer is not required to wait for a prolonged period of time to access a desired point in an interactive application.
  • the file system is provided with an index system to allow easy retrieval of files therefrom.
  • a television system including a display screen and a broadcast data receiver, said BDR receiving data from a broadcaster at a remote location and decoding and processing the data to provide video, audio and/or auxiliary data, said broadcast data relating to one or more television programmes and interactive service information, at least part of said interactive service information broadcast in a carousel format, said BDR having memory means for the storage of broadcast data following a viewer selection and characterised in that the data relating to said interactive services is retrieved from the carousel format as the data storage occurs and a first version stored in a file in the memory of said BDR, and for as long as repeated loops of the data remain the same no further interactive data is stored in memory.
  • a method of storing data in a broadcast data receiver said BDR receiving data from a broadcaster at a remote location and decoding and processing the data to provide video, audio and/ or auxiliary data, said broadcast data relating to one or more television programmes and interactive service information, at least part of said interactive service information data broadcast in a carousel format, said BDR having memory means for the storage of broadcast data following a viewer selection and characterised in that said method includes the steps of retrieving data relating to said selected interactive services from the carousel format and storing said retrieved data as part of a file system in the memory of said BDR, and when subsequent loops of the same data in the carousel format are received, the said data is not stored in the memory means.
  • the advantage of the present invention is that by storing the interactive data as a file system rather than as a single file containing transport stream, a significant amount of disk space is saved.
  • the interactive data can be accessed at any time without a user having to wait for the relevant section of the carousel to be available, as is the case with conventional systems.
  • Figures l a and l b illustrate the arrangement of a conventional file system
  • Figure 2 illustrates a time versioned file system according to the present invention.
  • data recorded on a memory means such as a Hard Disk Drive (HDD) of a BDR or set top box is typically recorded in the data transport streams format with each stream having a single storage file.
  • HDD Hard Disk Drive
  • the data transport streams are broadcast in a carousel format, a large amount of memory is required in the BDR to store what is repeated data.
  • the data transport stream is processed and saved as a plurality of files within a file system of the HDD, thereby reducing disk space and allowing easy retrieval of a particular file version on demand.
  • files within the file system are provided with a "delivery time" in addition to a path/name.
  • the delivery time or time stamp given to a particular file version is based on the system clock (STC) of the BDR.
  • STC system clock
  • part of the interactive application may be a current question.
  • the interactive file for the quiz show is updated to contain the new question.
  • the interactive data relating to the question is the same loop of data until the question changes whereupon a new loop or carousel of data is broadcast.
  • a new file version is stored in the memory means with a time stamp.
  • the BDR is required to have all versions of the stored interactive data available to the user so that the relevant version (question in this example) can be retrieved and displayed depending on the time in the programme which is retrieved for display from the HDD.
  • the system clock of the BDR reaches the relevant time stamp, the file version of the interactive data with a corresponding time stamp is played back to the user.
  • a programme selected to be recorded for subsequent viewing by storing the data in the HDD has an interactive data component that is broadcast in a carousel format with a data loop repeat rate of 30 seconds i.e the same data loop is repeated every 30 seconds and a bandwidth of IMbit/sec, then using conventional memory means of storage, the carousel data will occupy approximately 3.75 Mbytes of memory space in the BDR. The data contained in the carousel will be less than this due to the encapsulation overhead (data discarded from the transport stream when the transport stream is processed) .
  • the required space for the data in the file system of the invention would be less than 3.75 Mbytes (due to the removal of the transport stream and carousel encapsulation overhead) .
  • a reduction in required disk space of 99.16% is therefore achieved, as for as long as the data in the carousel format remains unchanged, only one data loop needs to be kept, the remaining unchanged data loops are simply discarded and not stored.
  • the expected increase in storage required may be predicted as follows:
  • figure l a shows the arrangement of a conventional memory means 2 wherein a single folder 4 contains two files 6, 8.
  • Figure lb shows a further conventional arrangement 3 wherein the entire transport data stream of the carousel format is saved as a single file 5 in a single directory 7.
  • FIG. 2 illustrates the memory allocation system 10 of the present invention.
  • Directory 12 comprises three carousel format data files. Each file, file W, file Z and Directory B, represents a particular data storage event, i.e a particular programme. Each file includes data for an interactive service rotating to a programme provided in a carousel format.
  • the carousel format typically provides version numbers that change as new versions of the carousel loops become available, thereby allowing the BDR to apply a time stamp to the newly acquired versions. Retrieval of a required version for playback of the interactive data to the viewer from the memory means depends on the time stamp allocated to each version.
  • the first part of directory 12 contains a file 14.
  • the file 14 has three versions and the retrieval of a particular version depends on the time stamp allocated to each version in comparison with the playback time of the associate programme data.
  • the second part of directory 12 contains a subdirectory 16.
  • the sub-directory 16 contains two files 18, 20.
  • File 20 represents a data carousel in which the data has remained static and is therefore saved as a single file.
  • the loop data of file 18 has changed over time, thereby producing three different versions 18', 18", 18'".
  • the third part of directory 12 contains a single static (unchanged data) loop file 22.
  • the storage system identifies the data file 18 as containing relevant interactive data.
  • the decision whether to access and process the version 18', 1 8" or 18'" is made depending on the time stamp on each version in comparison with the time stamp of the programme data, i.e the part of the programme being watched. A match of the time stamps dictates which of the versions 18', 18", 18'" is accessed and generated for viewing.
  • the structure of the filing system of the present invention can be built up in the above described manner and can cope with both changing versions of loop data within the same data storage file and a file system with a changing structure.
  • the interactive data can relate to, for example, questions to which the viewer can enter an answer via the BDR, data which allows the user selection of a particular service version, such as different audio versions, data which allows the user to enter a vote, or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

L'invention concerne un procédé, un système et un dispositif permettant la réception, le traitement et le stockage de données reçues par un récepteur de données de radiodiffusion; les données sauvegardées permettant la production ultérieure de sons et d'images pour des programmes télévisés, et ces données comprenant également des données de fonctions interactives généralement associées à de tels programmes. Lorsque l'utilisateur choisit d'enregistrement un programme par stockage des données dans une mémoire, les données interactives sont également stockées. Les données interactives sont généralement diffusées en format circulaire (boucles de données répétitives); concernant le stockage, les données d'une boucle sont stockées dans un fichier et toute modification de données dans des boucles ultérieures est stockée dans d'autres fichiers, ce mode de réalisation permet d'utiliser un espace de stockage réduit dans la mémoire.
PCT/GB2003/002282 2002-06-12 2003-05-27 Recepteur de donnees de radiodiffusion et procede de stockage des donnees WO2003107656A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003240047A AU2003240047A1 (en) 2002-06-12 2003-05-27 Broadcast data receiver and method of storing data therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0213432A GB0213432D0 (en) 2002-06-12 2002-06-12 Broadcast data receiver and method of storing data therefor
GB0213432.8 2002-06-12

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1555808A1 (fr) * 2004-01-19 2005-07-20 Alcatel Système de télécommunication multimédia avec dispositif multimédia polivalant
WO2005104557A1 (fr) * 2004-04-26 2005-11-03 Koninklijke Philips Electronics N.V. Procede d'enregistrement d'informations interactives sur une television numerique interactive et lecture de l'enregistrement
WO2006008675A1 (fr) * 2004-07-16 2006-01-26 Koninklijke Philips Electronics N.V. Appareil et procede permettant d'activer une application interactive
WO2008018702A1 (fr) 2006-08-07 2008-02-14 Samsung Electronics Co, . Ltd. Procédé et appareil de stockage et de reproduction d'un service interactif de radiodiffusion numérique
EP2020814A1 (fr) * 2007-07-25 2009-02-04 Samsung Electronics Co., Ltd. Procédé pour la fourniture de données diffusées et appareil vidéo l'utilisant
WO2011088262A1 (fr) * 2010-01-13 2011-07-21 Qualcomm Incorporated Mécanismes et systèmes de signalisation pour valider, transmettre et conserver des fonctions d'interactivité sur des dispositifs mobiles dans un système de communications mobiles de diffusion
WO2011088264A1 (fr) * 2010-01-13 2011-07-21 Qualcomm Incorporated Diffusion optimisée de ressources pour des événements d'interactivité dans un système de communications mobiles de diffusion
CN103081492A (zh) * 2010-01-13 2013-05-01 高通股份有限公司 用于创建并且在移动广播通信系统中的移动设备上传送交互事件的信令机制、模板和系统
US8914471B2 (en) 2010-05-28 2014-12-16 Qualcomm Incorporated File delivery over a broadcast network using file system abstraction, broadcast schedule messages and selective reception
US9485535B2 (en) 2010-01-13 2016-11-01 Qualcomm Incorporated Notification of interactivity event asset delivery sources in a mobile broadcast communication system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001033852A1 (fr) * 1999-10-29 2001-05-10 Opentv, Corp. Systeme et procede d'enregistrement de donnees poussees
EP1107600A1 (fr) * 1999-12-07 2001-06-13 Sony Service Center (Europe) N.V. Méthode et système pour optimiser un caroussel de données

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001033852A1 (fr) * 1999-10-29 2001-05-10 Opentv, Corp. Systeme et procede d'enregistrement de donnees poussees
EP1107600A1 (fr) * 1999-12-07 2001-06-13 Sony Service Center (Europe) N.V. Méthode et système pour optimiser un caroussel de données

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1555808A1 (fr) * 2004-01-19 2005-07-20 Alcatel Système de télécommunication multimédia avec dispositif multimédia polivalant
WO2005104557A1 (fr) * 2004-04-26 2005-11-03 Koninklijke Philips Electronics N.V. Procede d'enregistrement d'informations interactives sur une television numerique interactive et lecture de l'enregistrement
WO2006008675A1 (fr) * 2004-07-16 2006-01-26 Koninklijke Philips Electronics N.V. Appareil et procede permettant d'activer une application interactive
WO2008018702A1 (fr) 2006-08-07 2008-02-14 Samsung Electronics Co, . Ltd. Procédé et appareil de stockage et de reproduction d'un service interactif de radiodiffusion numérique
EP2050274A1 (fr) * 2006-08-07 2009-04-22 Samsung Electronics Co., Ltd. Procédé et appareil de stockage et de reproduction d'un service interactif de radiodiffusion numérique
EP2050274A4 (fr) * 2006-08-07 2011-01-19 Samsung Electronics Co Ltd Procédé et appareil de stockage et de reproduction d'un service interactif de radiodiffusion numérique
US8619763B2 (en) 2006-08-07 2013-12-31 Samsung Electronics Co., Ltd. Method and apparatus for storing and reproducing interactive service of digital broadcast
EP2020814A1 (fr) * 2007-07-25 2009-02-04 Samsung Electronics Co., Ltd. Procédé pour la fourniture de données diffusées et appareil vidéo l'utilisant
CN102771133A (zh) * 2010-01-13 2012-11-07 高通股份有限公司 用于在移动广播通信系统中的移动设备上启用、发送和维持交互特征的信令机制和系统
CN102714757A (zh) * 2010-01-13 2012-10-03 高通股份有限公司 移动广播通信系统中交互事件素材的最优传送
WO2011088264A1 (fr) * 2010-01-13 2011-07-21 Qualcomm Incorporated Diffusion optimisée de ressources pour des événements d'interactivité dans un système de communications mobiles de diffusion
CN103081492A (zh) * 2010-01-13 2013-05-01 高通股份有限公司 用于创建并且在移动广播通信系统中的移动设备上传送交互事件的信令机制、模板和系统
WO2011088262A1 (fr) * 2010-01-13 2011-07-21 Qualcomm Incorporated Mécanismes et systèmes de signalisation pour valider, transmettre et conserver des fonctions d'interactivité sur des dispositifs mobiles dans un système de communications mobiles de diffusion
US8676991B2 (en) 2010-01-13 2014-03-18 Qualcomm Incorporated Signaling mechanisms and systems for enabling, transmitting and maintaining interactivity features on mobile devices in a mobile broadcast communication system
WO2011088263A3 (fr) * 2010-01-13 2015-01-22 Qualcomm Incorporated Mécanismes, gabarits et systèmes de signalisation pour créer et transmettre des événements d'interactivité sur des dispositifs mobiles dans un système de communications mobiles de diffusion
US9032466B2 (en) 2010-01-13 2015-05-12 Qualcomm Incorporated Optimized delivery of interactivity event assets in a mobile broadcast communication system
CN102714757B (zh) * 2010-01-13 2016-01-20 高通股份有限公司 移动广播通信系统中交互事件素材的最优传送
US9485535B2 (en) 2010-01-13 2016-11-01 Qualcomm Incorporated Notification of interactivity event asset delivery sources in a mobile broadcast communication system
CN103081492B (zh) * 2010-01-13 2016-11-09 高通股份有限公司 用于创建并且在移动广播通信系统中的移动设备上传送交互事件的信令机制、模板和系统
US8914471B2 (en) 2010-05-28 2014-12-16 Qualcomm Incorporated File delivery over a broadcast network using file system abstraction, broadcast schedule messages and selective reception
US9819726B2 (en) 2010-05-28 2017-11-14 Qualcomm Incorporated File delivery over a broadcast network using file system abstraction, broadcast schedule messages and selective reception

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GB0213432D0 (en) 2002-07-24
AU2003240047A1 (en) 2003-12-31

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