EP3120571A1 - Procédé et dispositif d'identification d'un contenu en cours de visualisation sur un ecran - Google Patents
Procédé et dispositif d'identification d'un contenu en cours de visualisation sur un ecranInfo
- Publication number
- EP3120571A1 EP3120571A1 EP15712578.2A EP15712578A EP3120571A1 EP 3120571 A1 EP3120571 A1 EP 3120571A1 EP 15712578 A EP15712578 A EP 15712578A EP 3120571 A1 EP3120571 A1 EP 3120571A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- terminal
- fingerprint
- content
- brightness
- generated
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004364 calculation method Methods 0.000 claims description 18
- 238000012800 visualization Methods 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 230000006870 function Effects 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000513 principal component analysis Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000003909 pattern recognition Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video 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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4112—Peripherals receiving signals from specially adapted client devices having fewer capabilities than the client, e.g. thin client having less processing power or no tuning capabilities
-
- 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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/4223—Cameras
-
- 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
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/44231—Monitoring of peripheral device or external card, e.g. to detect processing problems in a handheld device or the failure of an external recording device
-
- 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
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/835—Generation of protective data, e.g. certificates
- H04N21/8352—Generation of protective data, e.g. certificates involving content or source identification data, e.g. Unique Material Identifier [UMID]
Definitions
- the invention relates to a method and a device for identifying, by a first terminal, a content being viewed on a screen of a second terminal located in the same space as the first terminal.
- the invention also relates to a communication terminal adapted to identify content being visualized on a screen of a second terminal located in the same space as the communication terminal.
- the invention further relates to a computer program stored on a recording medium and having instructions for performing the steps of the method.
- Increasing improvements in telecommunications techniques and devices allow audio-visual actors to associate additional content with the content provided to users, such as, for example, real-time interactivity, via professional and / or leisure applications.
- the digital contents displayed on a terminal must first be identified in real time during their display.
- An object of the invention is to allow automatic identification of a content in real time during its display, low in computing resources and easy to implement, using existing terminals.
- This object is achieved by means of a method of identification, by a first terminal, of a content being viewed on a screen of a second terminal located in the same space as the first terminal; this process comprising the following steps:
- the reference fingerprint is previously transmitted to said first terminal, and the comparison of the digital fingerprint generated with the reference fingerprint is performed by the first terminal.
- the first terminal transmits the generated digital fingerprint to a server that compares said generated fingerprint with the reference fingerprint.
- the comparison of the digital fingerprint generated with the reference fingerprint consists in calculating a distance between said fingerprints; the content then being identified if the calculated distance is less than a predefined threshold.
- the comparison of the digital fingerprint generated with the reference fingerprint consists in calculating a correlation between said fingerprints; the content then being identified if the calculated correlation is greater than a predefined threshold.
- the method according to the invention further comprises a synchronization step of an application, called Second Screen application, operating on the first terminal with the visualization of the digital content identified on the screen of the second terminal.
- the operator may associate to this content additional additional services, such as the purchase of a relative report to a city where the film or sports competition takes place, or the invitation to respond to an inquiry concerning this city.
- additional additional services such as the purchase of a relative report to a city where the film or sports competition takes place, or the invitation to respond to an inquiry concerning this city.
- the operator may also modify the additional services in real time depending on the evolution of the film or the competition being viewed.
- the method according to the invention not only to identify the digital content provided, but also a moment of the course of the program. This moment may correspond to the beginning of the capture of the luminosity, at the end of the capture of the luminosity, at the moment of the sending of the answer identifying the contents, or at the moment when an additional service must be offered to the user.
- each image of a digital content broadcast by an operator is associated with a time code having a date in hours, minutes, seconds and image number.
- This time code makes it possible to find each image of the content after its identification.
- the position of the imprint that is to say, the position from the beginning of the program, of the predefined duration during which the brightness uptake which gave rise to the impression generation was performed.
- the method according to the invention makes use of this information to obtain the position of each footprint in the content and to synchronize the Second Screen application with an identified content.
- the brightness is measured by means of a sensor integrated in the first terminal.
- the brightness is calculated from images acquired by means of a camera integrated in the first terminal.
- the digital fingerprint is calculated from the three color components of images acquired during a predefined capture time. This calculation is for example done by summing the brightness values of the components.
- a fingerprint by component compare each with the corresponding component of the reference fingerprint. It is also possible to generate any combination of these fingerprints representing the evolution over time of the brightness calculated from the different color components of the images acquired during the predefined duration.
- the method according to the invention is implemented by means of a device comprising:
- a memory comprising a plurality of reference numerical fingerprints, each reference fingerprint making it possible to identify one of the contents provided, a terminal provided with means for sensing the brightness produced in a space by the second terminal, and means to generate a digital fingerprint from the captured brightness,
- This device further comprises means for synchronizing an application operating on the first terminal with the real-time visualization of an identified digital content.
- Said terminal can be a smart mobile phone, a tablet, or a computer having means for capturing the brightness produced by displaying a content displayed on a screen, means for generating a digital fingerprint as a function of the brightness captured, means for comparing the generated digital fingerprint to a reference fingerprint previously stored in a memory, and means for identifying the visualized content.
- FIG. 1 showing a diagram of an installation in which the method according to the invention is implemented. 'invention.
- FIG. 1 diagrammatically represents an installation comprising a headend 1 a first terminal 2 of a user, and a second terminal 4 arranged in the same space 5 as the first terminal 2 and playing an audio-visual program provided by the head of network 1.
- the brightness produced by the display, by the second terminal 4, of a content propagates at all points of the space 5.
- the first terminal 2 can thus capture this brightness, independently its position in the space 5, without having to aim at the screen of the second terminal 4.
- the space 5 is for example the same room of a given room, such as a living room, an office or a room of a house or an apartment, or as a set of such rooms open on each other.
- the headend 1 comprises a transmitter 6 capable of broadcasting a bunch of audiovisual programs and a footprint calculation server 8 comprising a processing module programmed to compute on the fly a reference footprint 9, for example by analysis and processing of data. 'images, for each broadcast program.
- the calculated reference prints 9 are recorded in a memory 10.
- the broadcast can be performed on a satellite or terrestrial network, for example. It can also be broadcast in streaming mode, or streaming, especially on the Internet.
- these contents can then be provided as files for download.
- the contents can be provided in the form of files previously recorded on any removable physical medium such as a disk or a disk. key.
- the complete fingerprints that is to say over their entire duration, are then previously calculated and stored in the memory 10.
- the memory 10 is a simple computer memory, or a more structured and tooled database, for the formation of queries in particular.
- the first terminal 2 is able to communicate with the headend 1 and comprises a brightness sensor which preferably has a sensitivity that automatically adapts according to the ambient brightness and a calculation module adapted to transform a captured brightness into a light. digital imprint.
- This first terminal 2 further comprises a multimedia application, called Second Screen application, in the following of this description, which cooperates with a search module installed at the head of the network 1 to provide the first terminal 2 with additional data concerning a content in progress. of diffusion. These data relate for example to a game in relation to the visualized content, or a survey in relation to the visualized content.
- the fingerprints generated by the fingerprint calculation server 8 may, at least in part, be pre-loaded. for analysis in the first terminal 2 when activating the Second Screen application on the terminal 2.
- the additional data may also be, at least in part, pre-loaded in the first terminal 2.
- the acquisition of the brightness in the space 5 can be achieved by means of the brightness sensor generally integrated with the first terminal 2 or by means of a camera associated with this first terminal 2. In the latter case, a treatment of the acquired image can extract the brightness.
- the length of the signal to be captured can be set according to the number of contents available at the head of the network 1.
- the total length of the signal to be sensed may not be predetermined, but reached in successive increments of predetermined length.
- the capturing of the brightness and the generation of the digital fingerprint are successively carried out for segments, adjacent or not, of the content, and the digital fingerprint generated for each of these segments is transmitted in real time to the server.
- the iteration stops when the fingerprints generated for each of these segments make it possible to take a decision, that is to say to identify the content being viewed, or to diagnose the impossibility of identifying it, or when the length of the signal picked up exceeds a predetermined limit.
- a digital fingerprint 12 generated by the first terminal 2 is represented by a curve illustrating the evolution of the captured brightness.
- This footprint is characterized by a first parameter representing a time value on the abscissa axis.
- the ordinate axis corresponds to a brightness value measured by a sensor integrated in the first terminal 2 or calculated in the case of acquisition via a camera.
- the brightness value can be normalized on a scale of 0 to 100 for example.
- the user When the user wishes to benefit from the services associated with an audiovisual program being viewed, he activates the Second Screen application and has the first terminal 2 in the space 5 so as to capture the variations in brightness produced in this space by the images displayed on the screen 11 of the second terminal 4 for a predefined brightness capture duration.
- the captured brightness is transformed by the calculation module of the first terminal 2 into a digital footprint 12 which results from a sampling of the brightness produced by the second terminal 4 during the predefined capture time.
- the elementary time interval that constitutes this predefined duration of capturing the brightness depends on the sampling frequency of the signal picked up. Thus, for example, for sampling frequency values of 0.5 Hz, 1 Hz, 5 Hz, and 10 Hz, the elementary time interval has duration of 2 seconds, 1 second, 1/5 second and 1 second respectively.
- An exemplary representative curve 12 of an imprint is given by way of example in FIG. 1 for a determined duration and sampling frequency.
- the predefined duration of capture of the brightness, or the length of the generated fingerprints may be equal to an integer number of elementary samples and may for example be of the order of five to a few tens of times the duration of this elementary time interval.
- the first terminal 2 transmits the digital fingerprint 12 via the Second Screen application to the fingerprint calculation server 8, for example via a wireless connection, a data link by GSM, or an SMS.
- the fingerprint calculation server 8 searches for the corresponding reference fingerprint 9 in the memory 10. And when the length of the signal picked up is sufficient to allow a decision, that is to say if the content is identified or if the memory 10 does not contain a fingerprint enabling the content to be identified, the footprint calculation server 8 informs the Second Screen application, which stops capturing. Otherwise, the footprint calculation server 8 informs the Second Screen application, which reiterates the capture.
- the fingerprint calculation server 8 concatenates the fingerprints thus obtained for successive segments of the content at the fingerprint of the first segment, carries out the search for the resulting fingerprint, until the result of the comparison of the The resulting fingerprint with the reference fingerprints 9 is sufficiently significant, and makes it possible to decide whether the content is identified or not.
- This embodiment corresponds to the case where the segments for which imprints are generated successively are not adjacent.
- the concatenation of these fingerprints is therefore omitted, and, during the synchronization step, these fingerprints are each searched for as identifying the same content in the memory 10.
- the process is iterated until the length of the signal picked up is sufficient. to allow a meaningful comparison and to decide whether the content is identified or not.
- the search module operating in the footprint calculation server 8 makes successive comparisons of the digital fingerprint 12 generated by the first terminal with the reference fingerprint 9.
- the comparison consists in calculating a distance between said fingerprints, that is to say between the generated digital fingerprint 12, and a segment of the same length of the reference fingerprint 9. in this case, the content will be identified if the distance calculated between said fingerprints is less than a predefined threshold.
- the comparison of the generated fingerprint 12 with the reference fingerprint 9 consists in calculating a correlation value between said fingerprints, that is to say between the digital fingerprint 12 generated, and a segment of the fingerprint. same length of the reference fingerprint 9. In this case, the content is identified if the calculated value of the correlation between said fingerprints is greater than a predefined threshold.
- PCA principal component analysis
- each image of a broadcast program is associated with a digital value comprising a time code indicating a date in hours, minutes, seconds, and image number with respect to a start. program.
- This program start is for example for a content such as a movie, the moment corresponding to its first image, or, for a content such as a television channel, a given reference time of the course of its broadcast.
- the identification of the program broadcast is then performed by the footprint calculation server 8 on the basis of this information, for example concerning the last image of the fingerprint.
- the digital value 20 is transmitted to the first terminal 2 by the footprint calculation server 8 via a wireless connection, a data link via a mobile telephone network, or by an SMS.
- the current time in the content is determined by taking into account a processing time and fingerprint search, as well as communication, of a few seconds, or by calculating for example by means of a local clock based on the storing the start or end time of the brightness capture, transmission of the generated fingerprint to the fingerprint calculation server 8, or reception of the server response 8.
- the Second Screen application provides the user with an interaction related to the event that is broadcast at the moment, such as additional information, a game, a survey, or an interaction with social networks. It may also offer other programs related to the identified program.
- the digital fingerprint 12 is generated from each color component of these images.
- the footprint calculation server 8 can compare two or three (among respectively R, G, B or Y, U, V).
- the method according to the invention applies to identify content broadcast live and to allow synchronization and interaction in real time with this content, especially in the case of participation in a game, a quiz or a survey.
- the method also applies to identifying on-demand content (VOD) or pre-recorded content.
- VOD on-demand content
- the memory 10 contains the footprint of each of the contents, over the total duration of the content.
- the predetermined duration of the digital fingerprint 12 is longer in order to correctly discriminate the program being viewed.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Databases & Information Systems (AREA)
- Collating Specific Patterns (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1452336A FR3018983B1 (fr) | 2014-03-20 | 2014-03-20 | Procede et dispositif d'identification d'un contenu en cours de visualisation sur un ecran |
PCT/EP2015/055787 WO2015140252A1 (fr) | 2014-03-20 | 2015-03-19 | Procédé et dispositif d'identification d'un contenu en cours de visualisation sur un ecran |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3120571A1 true EP3120571A1 (fr) | 2017-01-25 |
Family
ID=51293042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15712578.2A Withdrawn EP3120571A1 (fr) | 2014-03-20 | 2015-03-19 | Procédé et dispositif d'identification d'un contenu en cours de visualisation sur un ecran |
Country Status (5)
Country | Link |
---|---|
US (1) | US20170085946A1 (fr) |
EP (1) | EP3120571A1 (fr) |
CN (1) | CN106105243A (fr) |
FR (1) | FR3018983B1 (fr) |
WO (1) | WO2015140252A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10506275B1 (en) | 2018-07-16 | 2019-12-10 | Gracenote, Inc. | Dynamic control of fingerprinting rate to facilitate time-accurate revision of media content |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140089307A1 (en) * | 2012-09-25 | 2014-03-27 | Audible Magic Corporation | Using digital fingerprints to associate data with a work |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10009327C2 (de) * | 2000-02-28 | 2002-01-24 | Harman Becker Automotive Sys | Verfahren zum Identifizieren gleicher Fernseh- oder Videobilder |
US8842186B2 (en) * | 2004-10-25 | 2014-09-23 | I-Interactive Llc | Control system and method employing identification of a displayed image |
CN101339590A (zh) * | 2008-08-15 | 2009-01-07 | 北京中星微电子有限公司 | 基于视频内容识别的版权保护方法、设备和系统 |
US8516533B2 (en) * | 2008-11-07 | 2013-08-20 | Digimarc Corporation | Second screen methods and arrangements |
US8819172B2 (en) * | 2010-11-04 | 2014-08-26 | Digimarc Corporation | Smartphone-based methods and systems |
US20110289099A1 (en) * | 2010-05-20 | 2011-11-24 | Rovi Technologies Corporation | Method and apparatus for identifying video program material via dvs or sap data |
US9615137B2 (en) * | 2010-12-22 | 2017-04-04 | Thomson Licensing | Associating information with electronic program guide entries |
US20130325601A1 (en) * | 2012-06-05 | 2013-12-05 | Yahoo! Inc. | System for providing content |
US20140279870A1 (en) * | 2013-03-12 | 2014-09-18 | Samsung Electronics Co. Ltd. | Method and apparatus for synchronizing shared data in mobile terminal and server |
US9143565B2 (en) * | 2013-05-30 | 2015-09-22 | Opentv, Inc. | Synchronizing an application on a companion device |
-
2014
- 2014-03-20 FR FR1452336A patent/FR3018983B1/fr active Active
-
2015
- 2015-03-19 WO PCT/EP2015/055787 patent/WO2015140252A1/fr active Application Filing
- 2015-03-19 CN CN201580014706.6A patent/CN106105243A/zh active Pending
- 2015-03-19 US US15/126,113 patent/US20170085946A1/en not_active Abandoned
- 2015-03-19 EP EP15712578.2A patent/EP3120571A1/fr not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140089307A1 (en) * | 2012-09-25 | 2014-03-27 | Audible Magic Corporation | Using digital fingerprints to associate data with a work |
Also Published As
Publication number | Publication date |
---|---|
FR3018983B1 (fr) | 2016-05-06 |
FR3018983A1 (fr) | 2015-09-25 |
CN106105243A (zh) | 2016-11-09 |
US20170085946A1 (en) | 2017-03-23 |
WO2015140252A1 (fr) | 2015-09-24 |
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