WO2008151942A2 - Système permettant d'effectuer une formation de conducteur - Google Patents

Système permettant d'effectuer une formation de conducteur Download PDF

Info

Publication number
WO2008151942A2
WO2008151942A2 PCT/EP2008/056599 EP2008056599W WO2008151942A2 WO 2008151942 A2 WO2008151942 A2 WO 2008151942A2 EP 2008056599 W EP2008056599 W EP 2008056599W WO 2008151942 A2 WO2008151942 A2 WO 2008151942A2
Authority
WO
WIPO (PCT)
Prior art keywords
camera
user input
driving
data
sequence
Prior art date
Application number
PCT/EP2008/056599
Other languages
English (en)
Other versions
WO2008151942A3 (fr
Inventor
Arne Roald
Original Assignee
Driving Performance Solutions As
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 Driving Performance Solutions As filed Critical Driving Performance Solutions As
Publication of WO2008151942A2 publication Critical patent/WO2008151942A2/fr
Publication of WO2008151942A3 publication Critical patent/WO2008151942A3/fr

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B9/00—Simulators for teaching or training purposes
    • G09B9/02—Simulators for teaching or training purposes for teaching control of vehicles or other craft
    • G09B9/04—Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of land vehicles
    • G09B9/052—Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of land vehicles characterised by provision for recording or measuring trainee's performance

Definitions

  • the present invention relates to the field of education of vehicle drivers. More particularly the present invention relates to the field of educating drivers of various types of vehicles such as cars, buses, lorries and motorbikes.
  • the present invention is an improvement, as it makes it easier to explain what happened during important passages of a driving lesson, and to illustrate to a pupil what has happened during a summing up session at the end of a lesson.
  • the present inventors have realised that it would be beneficial to provide a system that would be able to direct the attention of a pupil faster and more conveniently to recordings containing situations or sections of a driving lesson which are of particular interest. While analogue video recording of one or two situations in an instruction car has been used for recording earlier, this has not solved the need for a fast and precise feedback system. This is because way too much data has been collected to be able to give fast enough access to the right information for immediately to allow a short summing up stop or effective use of the few minutes available for a final summing of the driving lesson.
  • a system for computer assisted driving education comprising a first camera directed in a driving direction, a second camera directed in a direction generally opposite of the driving direction, and one or more sensors for vehicle condition data which supplies data to a processing and a storage unit for simultaneously, and at least temporarily, storing signals from the cameras and the sensor(s).
  • a user input device is provided for registering a manual user input, e.g. from a driving teacher, to indicate a situation or event of particular interest.
  • the processing and storage unit is adapted to relate the registered manual user input via the user input device to a sequence of camera and sensor signals. Thereby, it is possible for the instructor to define the situations/events of particular interest during the progression of a lesson..
  • a method for computer assisted driving education where signals are simultaneously recorded from a first camera, a second camera and vehicle condition sensor(s) in a processing and storage unit.
  • a manual input is recorded via a user input device and acts as a signal indicating an event of particular interest.
  • a relation is established between a registered manual input and a sequence of recorded data from the cameras and the sensor, respectively.
  • a major benefit with the present invention is that during a short summing up session after a driving lesson it will be possible to go to a record of targeted situation, defined by the manual input(s), in a speedy and efficient manner, without having to play back a whole lesson or a major part of a lesson.
  • This invention solves this problem, in addition to the task of position based recording, as the teacher may at any time identify a situation occurring at particular locations to be as desirable for further review of the pupil.
  • the processing device When the teacher presses the recording button he will "jump back in time” by letting the processing device store a record of a situation that started, say, 10 - 60 seconds back in time.
  • the instructor By already having identified that a particular situation is useful for storage before it gets stored, the instructor also may achieve a significant data reduction.
  • Fig. 1 illustrates a first example embodiment of a system and method for computer assisted driving education according to the invention.
  • Fig. 2 illustrates a second example embodiment of a system and method according to the invention including the use of a third camera directed at the face of the driver.
  • Fig. 3 illustrates how the data streams from the devices of the system according to the invention, for example data from cameras and sensors, are selected for storage by the pressing of a manual input.
  • Fig. 4 illustrates how data from the cameras, a microphone and vehicle sensors in a system and method according tot the invention are processed, selected, and compressed.
  • Fig. 1 illustrates an example embodiment of a system for computer assisted driving education according to the invention.
  • a first camera 1 is directed in a driving direction.
  • a second camera 2 is directed in a direction generally opposite of the driving direction.
  • the second camera may be a backward-looking camera as related to a normal forward driving direction.
  • the second camera 2 could be arranged so as to directed on the pupils eyes or face, or so as to include the eyes of the pupil in the images recorded at the same time as capturing the scene behind the vehicle, by also looking out through the back window of the car.
  • Fig. 2 shows another embodiment of the system according to the invention in which a separate third camera 20 is included and mounted so as to capture mainly the driver's eyes.
  • One or additional camera(s) could be directed on situations, items or persons of particular interest.
  • the driver is typically a pupil under education to obtain driving qualifications.
  • the third camera 20 may for example be mounted on the rear view mirror, directed towards the driver's eyes. When appropriately mounted such a third camera 20 enables recording of the eyes of the driver, including the eye movement, together with images from a forward looking camera 1 and/or a backward looking camera 2.
  • Some embodiments of the system according to the invention may include the use of more than two cameras. As an example in some vehicles, e.g. large vehicles, one or more additional cameras may be mounted on or integrated in the side view mirrors of the car.
  • the vehicle condition data could comprise traffic data related to the traffic scene in the surroundings of the car. From the GPS device the system may extract street data or other similar geographic information for storage together with the recorded camera and sensor information.
  • the sensor 3 for vehicle condition data could be connected by wire to the processing and storage unit 4 for transmission of the data by wired communications, but the traffic data could also be transferred to the processing and storage unit 4 by a suitable wireless transmission link.
  • a combination of traffic data, such as speed, brake signals, turn signals or voice could also be recorded by arranging a number of traffic sensors 3 to provide multiple sets of traffic data to the processing and storage unit 4 by corresponding speed, turn light, brake light or voice sensitive signal devices being connected either via wire or via a wireless communication channel to the processing and storage unit 4.
  • a system according to the invention may thus continuously handle and record streams of data from two or more cameras, sound from a microphone, and other relevant signals from the car, thus creating a fairly large volume of information.
  • the processing and storage unit 4 is provided with a temporary data storage module 10 for the data streams from the camera(s) and sensor(s).
  • the temporary data storage is designed so as to temporarily retain data only from a short period of a driving lesson, for example a 1-2 minutes period, whereas older data are overwritten or otherwise erased, to enable reuse of the locations in the temporary storage.
  • This temporary data storage works as a buffer storage only, and makes it possible to reduce the storage requirement significantly in such a system.
  • the temporary data storage could in one example embodiment comprise three memory units for temporary data, and could for example be volatile or nonvolatile electronic memories, otherwise known to a person of ordinary skill in the art.
  • the data stream is continuously and sequentially directed to the memory units.
  • Each memory unit will typically be capable of storing about data from a period of about one minute. In each one-minute period, one memory unit is full and acts as buffer, another memory unit is being filled with data, while a third memory unit is emptied or erased to be prepared for recording.
  • the amount of data obtained and defined as relevant for storage during the recording of a driving lesson may be reduced by including in the system a user input device 5.
  • a user input device 5 is arranged in the car in manner so that it can record a manual user input, from e.g. a driving instructor.
  • the user input device 5 can thus be used to obtain a signal from a user, whereby said user signal is an indication an event or situation of particular interest.
  • the processing and storage unit may relate the time of a manual user input with a sequence of recorded camera and sensor signals, typically a one to two minutes long sequence.
  • the instructor touches, pushes or otherwise activates the user input device 5. This way a stored recording starting 10-30 seconds or even as much as 1-2 minutes before the activation of the user input device is identified and is selected for storage by the processing unit 4.
  • the selected recording may be indicated on a storyboard 7.
  • a part of the processing and storage unit 4 is adapted for simultaneously storing signals from the cameras 1, 2 and the sensor 3.
  • the processing and storage unit 4 may also be adapted for simultaneously store an input from a user input device 5.
  • the start of a sequence of stored camera and sensor signal is defined as a pre-defined time or time shift prior to the time of a manual input via the user input device 5.
  • a manual input generating a signal from the user input device 5 may also be synchronously registered and stored, temporarily or permanently, either together with the stored camera and sensor signal or in a separate memory device.
  • the system according to the invention includes a presentation unit 6 which is adapted to present the stored camera 1,2, and the sensor signal associated with the manual user input 5.
  • the presentation unit 6 is arranged so as to present video images V from the front 1 or rear 2 camera in a main part of the display region, denoted a storyboard 7, for presenting current or stored sequences of data, for example a video sequence, together with sensor data, such as for example brake data B.
  • the story board 7 may include an index 8 of stored video sequences. Such an index typically includes one entry for each input from the user via the input device 5. The index could show the times of user input or merely a number associated with each sequence of data as identified by a user input.
  • the index 8 of the presentation unit 6 may be designed as a touch sensitive device for allowing a user to select one of several stored camera signals from an index of stored video sequences denoted reel, rec2,...., rec 5.
  • the presentation unit may be designed as a picture-in-picture type presentation, where for example the images recorded of the eyes of the pupil is presented as an image within an image of the recordings from the forward looking camera 1.
  • picture-in-picture arrangements of the presentation may be possible.
  • a memory unit 10 is provided for storing the images captured by the cameras, preferably in the form of digital video files.
  • the memory unit may be a part of the processing and storage unit 4 as indicated in the appended figure, however, the memory unit could also be arranged as memory external to the storage and processing unit 4.
  • the memory unit 10 may be of any type suitable for storage of a few minutes of signals from the cameras 1,2 and sensor 3.
  • magnetic storage devices such as a digital hard disk type devices are an alternative memory type, however, solid state digital electronic memories, such as traditional non-volatile computer memory which can be electrically erased and reprogrammed, such as for example a so-called FLASH-disk, could also be used.
  • the user input device 5 could be designed in a number of different forms and shapes. In many alternatives it will include a record button of some form which can be pushed by a user.
  • the user input device could be a gooseneck type device, as this is well suited for mounting with or next to the driver or passenger seat in a car. Further the user input device 5 could also be a computer mouse device or a joystick device.
  • the user input device comprises a touch sensitive unit, while in some embodiments of the system according to the invention the user input device may comprise a voice activation device.
  • a voice activation device may be designed in the form of a voice pick-up device for enabling simultaneous recording of the voice of a driving instructor.
  • a time module 12 may be coupled with or integrated into the user input device 5 for converting a signal from the manual user input device into a corresponding time flag or time stamp for processing and storage with a data generated by the camera 1,2 and sensor device 3.
  • data from the cameras 1,2 and sensor device 3 may be in the form of a continuous data stream 30, as illustrated on Fig. 3, representing images captured by the signals, where the data stream is continuously processed by the processing unit 4, and where said time flag or time stamp may be inserted as part of the data stream in order to identify a related sequence of data from the cameras 1,2,20 and sensor 3.
  • the related sequence includes data during a given period of time, said given period of time starting a pre-defined time before said manual input and extending up to and possibly after the time of the recorded manual input itself.
  • the pre-defined time may be in the range 5 seconds to 2 minutes, preferably in the range 10-60 seconds, more typically in the range 30-60 seconds, and will be a parameter that may be predefined by the equipment producer or there may be provisions for the instructor to select, depending on circumstances, this pre-defined time in a user menu of the system.
  • This way a sequence of data of particular relevance may be identified by the instructor and may thus easily be selected for storage and later retrieval for replay, for example via a touch sensitive sensor, for presentation 7.
  • a touch sensitive sensor could for example be of a type integrated into the display of the presentation unit 7.
  • Fig. 3 shows a continuous recording 30 in which section of data is selected for storage. Time may be visualized as a line along the continuous recording 30.
  • a situation of interest is identified, for example by the driving tutor identifies the situation by pressing the record button.
  • the driving tutor presses the record button 5 the situation of interest is registered by the system.
  • the data for permanent storage is defined at B to contain the recorded data starting at a predefined time before the record button is pressed, and the defined data for storage is at time C defined to stop either at the time when the record button is pressed a second time, or at a predefined period after the start time of the defined data for storage.
  • a recording for storage 31 is defined as a recording staring at e predefined time B before the record button is pressed and stops at time C when the record button is pressed again, or at after a predefined recording time has lapsed, starting from the time B.
  • the recording for storage includes the data recorded at the moment of the first push of the record button 5 and some time after this event.
  • Fig. 4 shows an alternative embodiment of the invention wherein the data from the cameras 1,2,20, a microphone MIC, and conditioned signals 25 from the vehicle are processed and stored using a processing and storage module 100 in the processing unit 4. Data are selected and optionally commented using selecting and commenting module 200, and subsequently the selected and optionally commented data are compressed in a data compression module 300 prior to being transferred to a data storage 400, possibly a data storage external to the processing unit 4, as indicated in Fig. 4. Comments from a driving teacher or tutor may be recorded using the microphone MIC. The present inventors have found that a compression ratio of 400 is achievable for the typical recorded data using available compression techniques, and this may make it realizable to store all data from a typical driving lesson.
  • a system may use a web-server 20 which is accessible to pupils via the Internet for providing a driving student access to a storyboard 7 and associated stored data from driving lessons from any Internet connected computer.
  • a student or pupil need not be physically in the vehicle in order to review the segments of a driving lesson defined and selected by the instructor to be of particular interest.
  • One advantage of the system is that it makes it possible to reduce the amount of data stored during a driving lesson, either by selection of data or by compression techniques.
  • An instructor will, by using the user input device, be able to identify and define a selected number of situations of particular interest, thus a few sequences of 1-2 minutes length may be selected for storage.
  • the recorded data includes data from the user input device 5.
  • the number of sequences stored is determined by the driving instructor as defined by input via the user input device 5, however, in the experience of this inventor only a few situations of particular interest occur during each driving lesson, these situations are typically 1-2 minutes long, is normally easily recognisable by a driving instructor, and as a consequence a situation of particular interest can be readily identified by the user by activating the user input device 5.
  • the data related to the situation defined to be of particular interest may be speedily be retrieved as data related to the activation of the user input device and the associated time is included with the stored data, whereby a replay of a situation of particular interest may be found and replayed right away without the pupil or the instructor having to look through a lot of video footage to be able to find the video sequences of particular interest.
  • the system for computer assisted driving education simultaneously records signals from a first camera 1, a second camera 2 and a traffic data sensor 3 in a processing and storage unit 4.
  • a manual input via a user input device 5 is recorded as an indicator of an event or situation of particular interest.
  • a relation is established between a registered manual input and a sequence of recorded data from the cameras 1,2 and the sensor 3 in the processing and storage unit 4.
  • the step of establishing a relation between a registered manual input via a user input device 5 and a sequence of recorded data from the cameras 1,2 and the sensor 3 thus comprises defining the start time of a sequence of data from the camera(s) and sensor(s) to be at a pre-defined time before the time of the user input. This way the manual user input defines a sequence of data starting at a time prior to a recorded manual input.
  • a manual input data from a recorded sequence of stored camera and sensor data may be transferred from a temporary storage device to a non-temporary storage.
  • user input signals could also be stored together with camera and sensor data.
  • Pre-recorded automatic instructions could also be replayed during a lesson as part of the system, and the replaying of instructions could then also be recorded together with the camera and sensor data.
  • a sequence of recorded data from the cameras 1,2 and the sensor 3 related to a registered manual input may in addition be transferred to a web-server.
  • the data Via the web-server 20 the data may be made accessible to pupils for personal training following the completion of a driving lesson, together with personal advice or recommendations associated with the education in general or with the lesson in particular.
  • the processing unit 4 may include functionality for storing in the database 400 many or even all recordings defined as relevant by activations of the manual input during a single driving lesson, from multiple driving lessons or even from a complete set of all driving lessons, thereby creating a complete documentation of the driving and teaching process, stored in the database.
  • the decision on whether the data shall be stored is taken after the sequence of events which it is desirable to store information about actually started happening.
  • the reduced data amount is consequently also filtered with regard to relevance, i.e. only "good information" is stored, by the instructor input via the user input device.
  • the defined recorded sequences can be made available on the screen right away, for immediate review for example after a driving lesson.
  • the reduced data amount also ensures that.
  • the recorded data sequences will automatically start at situations of interest at later reviews, meaning that situations very relevant for the teaching of the pupil are easy to find and obtain for a review, for example at the end of a lesson.
  • Full flexibility is also acheived in that it will be possible to shift between the datastreams in a later display, in order that it is possible to study what occurred shortly before the time when the instructor identified a situation of interest for teaching purposes.
  • the present invention enables driver education systems has evolved from being complex and cumbersome to use to being an effective teaching tool.
  • the invention also reduces amount of data, providing the added benefit of lower demand for data storage, thus reducing associated hardware cost and space requirements.
  • the system provides a fast and efficient reduction of the amount of data stored in that the identification of relevant data is simplified. And relevant recorded data may be obtained in a fast and simple manner for later review of the driving lesson. This makes the system even more attractive for driver education purposes.
  • a more effective teaching system is provided whereby a driving pupil and his driving instructor faster and more conveniently may access recorded scenes or situations which are of particular interest from a driving lesson.
  • a further benefit is that the storage requirement for the in-car equipment may be reduced to a few minutes of video data, an amount of data that is more easily managed and which may be transferred to external equipment, for example a web server, in a manageable manner. As only 8-10 situations occur throughout a typical driving lesson, the amount of data for storage may be reduced to a practical, manageable level.
  • a driving instructor may select a situation from the storyboard by pointing his finger at the touch sensitive area and the chosen situation can be replayed and explained by the instructor.
  • Verbal and written input from the instructor may also be added to the stored recoding by recording also later input from the instructor, for example his oral comments may be recorded using a microphone connected to the system, and written comments from the instructor may be added via a keyboard, a laptop type computer or any similar device included in the system in the car or connected to the web-server 20.
  • This way a whole summed up and commented driving lesson may be stored on a webserver 20, accessible to a driving student for example for private training recommendations.
  • a major benefit of the present invention is that is enables recording and replaying of recorded situations defined to be of particular interest, as defined by the manual input from a driving teacher, while at the same time minimising the data storage requirement, as only the data related to the situations of particular interest are stored permanently, while the remaining data recorded can be erased or overwritten in a temporary storage as a driving lesson progresses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Physics & Mathematics (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

L'invention concerne un système et un procédé permettant une formation à la conduite assistée par ordinateur. Dans le système, une première caméra (1) est dirigée dans une direction de conduite tandis qu'une seconde caméra (2) est dirigée dans une direction sensiblement opposée à la direction de conduite. Un capteur (3) de données de trafic et une unité de traitement et de stockage (4) pour enregistrer et stocker simultanément des signaux provenant des caméras et du capteur sont inclus. Un dispositif d'entrée utilisateur (5) est aussi inclus pour enregistrer une entrée utilisateur manuelle provenant d'un individu, par exemple un moniteur de conduite, pour indiquer des événements d'intérêt particulier, et l'unité de traitement et de stockage lie une entrée utilisateur manuelle enregistrée par l'intermédiaire du dispositif d'entrée utilisateur (5) à une séquence de signaux de caméra (1, 2) et de capteur (3).
PCT/EP2008/056599 2007-06-14 2008-05-29 Système permettant d'effectuer une formation de conducteur WO2008151942A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20073043 2007-06-14
NO20073043 2007-06-14

Publications (2)

Publication Number Publication Date
WO2008151942A2 true WO2008151942A2 (fr) 2008-12-18
WO2008151942A3 WO2008151942A3 (fr) 2009-02-26

Family

ID=39874872

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/056599 WO2008151942A2 (fr) 2007-06-14 2008-05-29 Système permettant d'effectuer une formation de conducteur

Country Status (1)

Country Link
WO (1) WO2008151942A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011126379A1 (fr) * 2010-04-04 2011-10-13 Driving Performance Solutions As Système et procédé d'entraînement de conducteurs
US20150360698A1 (en) * 2014-06-13 2015-12-17 University Of Pittsburgh - Of The Commonwealth System Of Higher Education Systems and method for driving evaluation and training
WO2018101978A1 (fr) * 2016-11-30 2018-06-07 Nissan North America, Inc. Système de tutoriel de véhicule et procédé d'envoi de tutoriel de véhicule à un dispositif gestionnaire de tutoriel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000051097A2 (fr) * 1999-02-26 2000-08-31 Intel Corporation Systeme de formation de conducteurs
DE19914861C1 (de) * 1999-04-01 2001-01-25 Rein Erik Vorrichtung für ein Fahrschulfahrzeug
WO2004015653A1 (fr) * 2002-08-09 2004-02-19 Best Practice Deployment As Systeme de leçons de conduite assistees par ordinateur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000051097A2 (fr) * 1999-02-26 2000-08-31 Intel Corporation Systeme de formation de conducteurs
DE19914861C1 (de) * 1999-04-01 2001-01-25 Rein Erik Vorrichtung für ein Fahrschulfahrzeug
WO2004015653A1 (fr) * 2002-08-09 2004-02-19 Best Practice Deployment As Systeme de leçons de conduite assistees par ordinateur

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011126379A1 (fr) * 2010-04-04 2011-10-13 Driving Performance Solutions As Système et procédé d'entraînement de conducteurs
US20150360698A1 (en) * 2014-06-13 2015-12-17 University Of Pittsburgh - Of The Commonwealth System Of Higher Education Systems and method for driving evaluation and training
US9623875B2 (en) * 2014-06-13 2017-04-18 University of Pittsburgh—of the Commonwealth System of Higher Education Systems and method for driving evaluation and training
WO2018101978A1 (fr) * 2016-11-30 2018-06-07 Nissan North America, Inc. Système de tutoriel de véhicule et procédé d'envoi de tutoriel de véhicule à un dispositif gestionnaire de tutoriel

Also Published As

Publication number Publication date
WO2008151942A3 (fr) 2009-02-26

Similar Documents

Publication Publication Date Title
EP2171717B1 (fr) Production automatisée non séquentielle, par un kit d'auto-interview ou scenario avec prompteur, d'une vidéo de contenu multimédia généré par l'utilisateur.
RU2347285C1 (ru) Устройство записи/воспроизведения и относящийся к нему способ управления отображаемыми на дисплее данными
JPS61502285A (ja) シュミレ−ション・システム訓練装置
JP5551913B2 (ja) 動画追尾による情報提供システム
US20100275164A1 (en) Authoring apparatus
US20060057543A1 (en) System for computer assisted driving lessons
CN1533672A (zh) 记忆辅助系统
JP5998338B2 (ja) 映像表示システム
Fernandez et al. Portable MP3 players: innovative devices for recording qualitative interviews
WO2008151942A2 (fr) Système permettant d'effectuer une formation de conducteur
JP5042711B2 (ja) 運行管理装置
JP2002152721A5 (fr)
JP2012155285A (ja) 運転危険予測学習支援システム
EP1513351A3 (fr) Un appareil d'enregistrement/de reproduction.
JP6645805B2 (ja) 危険予知の訓練装置及び訓練プログラム
Murray Jr Videotaped depositions: putting absent witnesses in court
EP3726808A1 (fr) Procédé et dispositif de commande d'affichage pour écran monté sur véhicule, automobile et support de stockage informatique
WO2014043511A1 (fr) Procédé et système pour la formation d'officiels sportifs
Fadde et al. Technical considerations and issues in recording and producing classroom video
JP3810747B2 (ja) 通信教育システム
JP3685574B2 (ja) 運転支援画像取り込み装置
JP2005136485A5 (fr)
JP2005284490A (ja) データ記録装置およびデータ再生装置
CN111601125A (zh) 录播视频摘要生成方法、装置、电子设备及可读存储介质
CN113422974B (zh) 一种直播讲义同步复习的系统及方法

Legal Events

Date Code Title Description
NENP Non-entry into the national phase in:

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08760190

Country of ref document: EP

Kind code of ref document: A2

122 Ep: pct application non-entry in european phase

Ref document number: 08760190

Country of ref document: EP

Kind code of ref document: A2