EP3204946A1 - Dispositif pour générer un flux de données de sortie vidéo, source vidéo, système vidéo et procédé pour générer un flux de données de sortie vidéo ou un flux de données de source vidéo - Google Patents

Dispositif pour générer un flux de données de sortie vidéo, source vidéo, système vidéo et procédé pour générer un flux de données de sortie vidéo ou un flux de données de source vidéo

Info

Publication number
EP3204946A1
EP3204946A1 EP15750990.2A EP15750990A EP3204946A1 EP 3204946 A1 EP3204946 A1 EP 3204946A1 EP 15750990 A EP15750990 A EP 15750990A EP 3204946 A1 EP3204946 A1 EP 3204946A1
Authority
EP
European Patent Office
Prior art keywords
video source
video
data stream
source data
time
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Withdrawn
Application number
EP15750990.2A
Other languages
German (de)
English (en)
Inventor
Eugen Wagner
Christopher Saloman
Wolfgang Thieme
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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 Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Publication of EP3204946A1 publication Critical patent/EP3204946A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/038—Cross-faders therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/265—Mixing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/268—Signal distribution or switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/272—Means for inserting a foreground image in a background image, i.e. inlay, outlay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/643—Hue control means, e.g. flesh tone control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/74—Circuits for processing colour signals for obtaining special effects
    • H04N9/75—Chroma key
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/74—Circuits for processing colour signals for obtaining special effects
    • H04N9/76—Circuits for processing colour signals for obtaining special effects for mixing of colour signals

Definitions

  • Apparatus for generating a video output data stream for generating a video output data stream, video source, video system and method for generating a video output data stream
  • the present invention relates to a device for generating a video output data stream, such as a video mixer, to a video source, to a video system and to methods for generating a video output data stream or a video source data stream.
  • the invention further relates to a computer program and to distributed creation of special video effects in a multi-camera life-enabled video production system.
  • the workflow of a life-video production with multiple cameras can be described in a simplified way so that the video streams of the cameras are transmitted in real-time to the video mixer.
  • the director decides which of the cameras to send, that is, "on air.”
  • the video stream can then be transposed, such as logos, graphics, or text, then the output stream is encoded and sent over a network (such as the Internet, satellite, or Cable) provided to the consumer.
  • a network such as the Internet, satellite, or Cable
  • Transition effects Adding transition effects in real time is supported by many video mixers on the market. However, these are mostly devices from higher price categories. They have inputs for uncompressed video and network interfaces for Internet Protocol (IP) -based transmission of compressed video streams. Received encoded video data is first decoded. The mixing is done on the basis of uncompressed video data, which are then re-encoded. This solution implies high demands on the hardware of the video mixer and thus on the price.
  • IP Internet Protocol
  • a dedicated hardware video mixer decodes the incoming video streams from connected cameras, calculates video effects, and encodes the resulting video stream or forwards the output stream to a separate encoder.
  • the benefits of such a solution include a wide range of features, very good performance, and a way to combine encoded and non-encoded video sources.
  • this solution is an integral part of established workflows.
  • the disadvantages include a complex operation, a high price, a limited mobility of the device and a high computational effort, which must be performed by the video mixer.
  • the software links four mobile devices into a group and lets the encoded video streams be transferred live from the devices that appear as "cameras" to the "director" device, the video mixer.
  • the Director device controls the switching between video streams.
  • the software allows the addition of crossfade effects when switching between the cameras.
  • the output video will be merged offline after the recording has finished. This is done using step marks created by the Director during the recording process, and the creation of cross-fade effects requires the decoding and encoding of parts of the recording.
  • the cameras transmit encoded video streams to a server that has the necessary resources to process the data in real time.
  • the director has access to the controls via a web interface, such as a preview of all video / audio sources. Cut, effects, etc. granted.
  • the advantages of such solutions include increased scalability, as the required performance is available to buy. Also, the price for the server is lower than the cost of own hardware. Critical are the quality features of the network connection, such as available channel bandwidth or possible transmission errors. This limits the field of application of this solution.
  • the object of the present invention is to provide a live or real-time capable device for generating a video output data stream which has transition effects, the device only requiring a low computing power for this, so that the requirements for energy and / or computing power are low are.
  • an apparatus for generating a video output data stream includes first and second signal inputs for receiving first and second video source data streams.
  • the apparatus further comprises processor means configured to base the video output data stream at a first time based on the first video source data stream and by means of a switching operation at a second time following the first time. provide on the second video source data stream.
  • the apparatus further includes a control signal output for sending a control command to a video source, wherein the video source receives the first or second video source data stream.
  • the control command includes an instruction to the video source to apply a transition effect to the provided source video stream or a sequence of images.
  • the transition effect is timed between an image of the first and an image of the second video source data stream in the video output signal.
  • the processor device is designed to process a program code in synchronism with a processor device of the video source, that is to say the device for generating a video output data stream is synchronized with one, several or all video data sources.
  • a processor device of the video source that is to say the device for generating a video output data stream is synchronized with one, several or all video data sources.
  • transition effects or partial transition effects can be carried out distributed in the video sources, so that the calculation costs for the respective video source are reduced.
  • both transition effects before switching over, for example during the blanking, by the first video source and also after the switching, for example during the insertion can be represented by the second video source, ie. H. applicable.
  • the device is configured to provide the first or second video source data stream with the transition effect as the video output data stream without manipulating the first or second video source data stream.
  • An advantage of this embodiment is that the device in the sense of a changeover switch or in the sense of a switch executable that between the Video source data streams can be switched and only one video source data stream as video output squelstrom forwarded or provided, so that the video output data stream with further reduced computational effort is available.
  • a video source configured to output a video source data stream includes a signal input for receiving a control command from a device for generating a video output data stream.
  • the control instruction includes an instruction to apply a transition effect on the source video data stream, the instruction relating to at least one of a time duration, a start time, an end time, a map, a type, or an intensity of the transition effect. It is advantageous in this exemplary embodiment that the implementation of the transition effect can already take place before the video source data stream is encoded by the video source.
  • the video source comprises a processor device, which is designed to process a program code in synchronism with a processor device of a device for generating a video output data stream.
  • the video source is configured to apply the transition effect based on influencing the image signal processing chain or based on a graphical processor device.
  • Further exemplary embodiments relate to a method for generating a video output data stream, to a method for outputting a video source data stream. Further embodiments relate to a computer program.
  • FIG. 1 is a schematic block diagram of a video system having an apparatus for generating a video output data stream, a first video source and a second video source according to an embodiment
  • FIGS. 2a-d are schematic representations of camera-executed video sources at different times with respect to a switching time of the device for generating the video output data stream according to an embodiment, in which
  • Fig. 2a illustrates a time when no transition effect is applied
  • Fig. 2b illustrates a time at which the first video source presents a first transition effect and the video output stream has the transition effect
  • Fig. 2c illustrates a time at which the second video source represents a second transition effect, has switched the video output current generating device, and the video output current has the transition effect;
  • FIG. 2d illustrates a time at which the first and second transition effects are completed
  • FIG. 3 shows a schematic comparison of the video source data streams and of the
  • FIG. 1 shows a schematic block diagram of a video system 1000 with a device 100 for generating a video output data stream 102, a first video source 200a and a second video source 200b.
  • the video source 200a or 200b may, for example, be a camera or a storage medium that is designed to output a video source data stream 202a or 202b.
  • the video source data streams 202a and / or 202b may be, for example, unencrypted, uncompressed, encoded (encoded) video signals.
  • the video source data streams 202a and 202b are encoded, that is, compressed, video signals.
  • the device 100 comprises a first signal input 104a for receiving the (first) video source data stream 202a and a second signal input 104b for receiving the (second) video source data stream 202b.
  • the apparatus 100 further includes a signal output 106 for outputting the video output data stream 02, such as to a medium or distribution network and / or to a (video) player.
  • the device 100 comprises a control signal output 1 12 for sending a control command 1 14 to the video sources 200a and / or 200b.
  • the control command includes an instruction to the video source 200a and 200b to apply a transition effect to be reproduced in the video output data stream 102.
  • the device 100 includes a processor device 130 configured to generate the video output data stream 102.
  • the processor device 130 is configured to switch between the video source data streams 202a and 202b to produce the video output data stream 102, such that the video output data stream 102 is determined, for example, at a first time by the video source data stream 202a and at a second time by the video source data stream 202b. Switching can occur between two consecutive times, which is also referred to as hard switching.
  • the processor device 130 is configured to use either the video source data stream 202a or the video source data stream 202b in the function of a switch or switch forward and provide as video output data stream 102.
  • the device 100 may each time-selectively forward a video source signal 202a or 202b without decoding, modifying, and encoding the respective signal, that is, without manipulating the signal.
  • the processor device 130 can furthermore be designed to either encode the video source data stream 202a or 202b to be forwarded or to encode it, ie beyond a previous extent, such as compatibility of the video output data stream 102 with a communication protocol, such as TCP / IP (FIG. Transmission Control Protocol / Internet Protocol), WLAN (Wireless Local Area Network) and / or a wired communication protocol. Furthermore, an encoding can also take place such that the video output data stream 102 can be stored in a file format.
  • a switch 132 between the video source data streams 202a and 202b may be triggered by a user input 16 which is received at a user interface 118 from the device 100 and routed to, ie, provided to, the processor device 130.
  • the user interface 118 may be a wired interface, such as when the switch 132 is triggered based on a button press on the device 100 or an input device thereof.
  • the user interface 118 may be a wireless interface, such as when the user input 16 is received wirelessly, such as by a wireless remote control.
  • the transition effect may be, for example, a fade-in, a fade-out, a variation of one or more color intensities or a contrast, and / or a fading of the signal provided by the video source or a sequence of images with a graphic or a Picture include.
  • the transition effect may include a deterministic or stochastic mapping function, such as distortion of the output image, a (pseudo-) random change of the image, and / or a mosaic effect.
  • the device 100 is configured to configure the control command 14 accordingly, such that the control command includes an instruction directing a received video source 200a and / or 200b, at least partially, into the video source data stream 202a and / or 202b provided by it to integrate.
  • the device 100 may, for example, be designed as a video mixer. Alternatively or additionally, the device 100 may be embodied as a personal computer (PC) or as a mobile device, such as a mobile phone or tablet computer.
  • the first and second signal inputs 104a and 104b may also be combined as a common interface, such as a network or wireless interface.
  • the video sources 200a and 200b have a signal input 204a or 204b at which the video source 200a or 200b receives the control command 14.
  • the video source 200a comprises a device 210 for providing a sequence 212 of images, such as a camera chip or a data memory, on which a plurality of images are stored and which is designed to retrieve the sequence 212 with a multiplicity of images.
  • the video source 200a further includes a processor device 220 that is formed. to receive the sequence 212 of images from the device 210 and to at least partially overlay them with the transition effect. This will hereinafter be referred to as a superimposition of the video information with the transition effect.
  • the processor device 220 is further configured to generate the video source signal 202a.
  • the processor device 220 may be a processor of the video source, such as a central processing unit (CPU), a microcontroller, a Field Programmable Gate Array (FPGA), or the like.
  • the video source 200a is configured to output the video source data stream 202a based on the transition effect, and the video source data stream 202a has the transition effect in an application of the overlaying effect.
  • the video source can be designed to apply the transition effect based on an intervention in a hardware-accelerated image processing processor (ISP) and / or based on image processing by means of a graphical processor device. This allows realization of the transition effect in a small amount of time and / or a small number of arithmetic operations.
  • ISP hardware-accelerated image processing processor
  • the video source 200 includes an output interface 206 configured to transmit the video source signal 202a.
  • the transmission may be wireline, such as via a network or direct cable connection to the device 100.
  • the transmission can also be wireless.
  • the signal inputs 104a, 104b, 112, 204a, 204b, and / or 206 may be implemented as wired or wireless interfaces.
  • the video source 200 includes an optional graphics memory 230 that is configured to store a graphic and provide it to the processor device 220.
  • the graphics may, for example, be a logo or a continuous or constant image effect, which is superimposed at least temporarily with images provided by the device 210.
  • the video source 200a and / or 200b may be configured to receive corresponding graphics from another device, such as a computer or device 100. This can be done for example by means of a separate or already existing transmission channels, such as a channel on which the control command 1 14 is transmitted.
  • the video sources 200a and 200b may be embodied, for example, as two cameras which capture the same or different object areas, approximately the same (possibly from different angles) or different (sports) events or other recordings such as person and / or landscape scenes.
  • at least one of the video sources 200a or 200b may be embodied as video memory, for example as hard disk storage.
  • the video system 1000 may comprise further video sources.
  • a transition effect may be desired, for example, by a user.
  • the corresponding input 1 6 is included For example, by means of the interface 1 18 receivable.
  • Information relating to the transition effect is sent by means of the control command 1 4 to the respective or all participating video sources 200a and / or 200b.
  • the device 100 provides information about which switching effect should be performed at which times. The information may relate, for example, to an identification, such as a number or index of the transition effect, to a duration of the transition effect, to a start time, to an end time, to a type or intensity of the transition effect.
  • the control command 1 14 can be sent specifically to a video source 200a or 200b or sent by broadcast to all participants, so that the respective receiver, that is, the video source 200a or 200b recognizes that the message is intended for you.
  • transition effect involves manipulation or alteration of the video source data streams 202a and 202b of both video sources 200a and 200b involved
  • this transition effect can be subdivided into two or more subeffects.
  • At least a partial effect is applicable to the sequence of images 212 of the respective video sources 200a and 200b, respectively.
  • a transition effect (possibly referred to as gentle), from a first to a second video source data stream, may consist of a blanking effect of the first and a blanking effect of the second data stream.
  • This transition effect can be represented as the first part-transition effect (blanking effect) and the second part-transition effect (overlay effect).
  • Each partial transition effect may be applied by one of the video sources 200a and 200b, respectively.
  • a fade-out of a video source data stream 202a provided as a video output data stream 102 at a time and a fade-in of a video source data stream 202b subsequently included in the video output data stream 102 may be performed by a fade-out in the video source 200a and a fade-in the video source 200b are realized.
  • the transition effect can also be realized only in a video source data stream, such as fading out or fading, or merely fade-in or fade-in.
  • the processor devices 130 of the device 100 and 220 of the video sources 200a and / or 200b can be synchronized with each other in time, so that a temporally matching positioning of the individual transition effects is adjustable
  • a temporal synchronization for example by means of another transmission channel, or in which the control command is transmitted by means of a transmission channel in which the video source data streams 202a and / or 202b are transmitted and / or by a common synchronization signal which is transmitted on other channels device 100 and / or received by video sources 200a and 200b, respectively.
  • This allows for additional synchronization of the video streams 202a and 202b, each with and without transient effects by the device 100, to be eliminated
  • the video sources 200a and / or 200b may be further configured to output the respective video source data streams 202a and 202b at a variable bit rate, respectively.
  • the video source (s) whose video source data stream is not currently being inserted into the output data stream 102 only send (video) information of a lower quality, ie bit rate, and for example a bit rate of the video source whose video source data stream is in the video output stream is integrated, with an equal or higher bit rate and / or quality sends.
  • This can be particularly advantageous in the case of a shared transmission medium, for example a shared radio medium or a common wired network.
  • the respective forwarded video source 200a or 200b may generate video signals 202a and / or 202b at a high or maximum bit rate, whereas, for example, a thumbnail or a lower resolution representation of the currently unused video source data streams may be used by the operator using the apparatus 100 Transition effect initiated and / or considered the video source data streams 202a and / or 202b, is sufficient to judge whether a switch is to take place.
  • the respective video source can be instructed to change the bit rate of the respective video source data stream to a predetermined or the value contained in the message.
  • the video source may also be designed to automatically change the bit rate, for example to reduce the bit rate after a blanking effect has ended and / or to increase the bit rate from a reduced value before or at the same time as a starting overlay effect.
  • a basic idea is that the creation of transition effects is left to the cameras. This significantly reduces the requirements for the video mixer, that is, the device for generating the video output data stream. For example, it should only be able to receive the incoming video streams from one or more cameras, for example in encoded form, and to output one of the streams as an output video stream.
  • the video mixer may be able to display the incoming video streams, such as on a monitor or the video streams of a video monitor. to provide a monitor.
  • the video mixer for example, be able to perform a decoding of the video streams.
  • the decoding can also be done in the monitor. No transcoding of the video data is necessary.
  • a prerequisite or a further development may be that the cameras and the video mixer have a common time base, ie are synchronized. Also a communication possibility between the video mixer and the connected cameras (return channel) can be assumed.
  • the switching can either be hard or a transition effect can be created. A hard cut can be understood when a current S1 is used as the output current before a switching time 7 " and at time T the video current S2 becomes the output current.
  • FIGS. 2a-d show schematic representations of the video sources 200a and 200b as camera at different times with respect to a switching time.
  • the video sources 200a and 200b respectively send the video source data stream 202a and 202b to the device 100 (video mixer).
  • FIGS. 2 a - d further show a content of the video output data stream 102
  • FIG. 2 a shows schematically at times k ⁇ T S1 that the video source 200a provides the video source data stream 202a designated as S1 and the video source 200b the video source data stream 202b designated as S2 of the apparatus 100.
  • the device 100 generates the video output data stream 102 based on the video Source data stream 202a or provides this.
  • 7 S1 denotes a starting time point of a (partial) transition effect with a duration of 7 max1 applied by the video source 200a.
  • the illustrated times k are before a start of a representation of the transition effect in one of the data streams 202a or 202b, which is described as "k ⁇ 7 S1 .”
  • S i until a time k 7 S1 + 7 max1 a transition effect is applied to the video source data stream 202a, resulting in a modified video source data stream S'1.
  • the video source 200a delivers the modified video source data stream S at times k that are greater than or equal to the time instant 7 S1 and less than or equal to 7 S i + 7 ma 1 '1. This results in a transition effect contained in the video output data stream 102, as indicated by the designation S'1 in the video output data stream 102.
  • Fig. 2c shows schematically the video output data stream 102 after the switching operation.
  • the video source 200b is configured to implement a (partial) transition effect in the video source data stream 202b starting at a time instant 7 S2 for a duration T max2 and to output the thus modified video source data stream 202b, which is indicated by the designation S'2.
  • the video mixer or device 100 is configured to generate the video output data stream 102 based on the video source data stream 202b. That is, the device 100 has switched from the video source data stream 202a to the video source data stream 202b at the time T S 2 from the situation shown in Fig. 2b to output the same.
  • the superimposition of the current S2 ends with the superimposition effect, so that the video source 200b terminates the (unmodified) stream S2 provides.
  • the video source 200b provides the non-transitionally superimposed or modified video source data stream 202b (S2), which, with the device 100 unchanged, results in the video output data stream 102 provided based on the video source data stream 202b.
  • the device 100 may also be configured to switch at a different time between the video source data streams 202a and 202b, to which the video source data stream 202a and / or 202b has a (partial) transition effect. For example, if only one of the video sources 200a or 200b applies a transition effect, the switching may occur during the duration of this effect. The switching may occur at the beginning, at the end, or during a duration of the (fractional) transition effect, such as when total blanking of the first video source data stream 202a is not required or desired.
  • a message is sent to each of the video sources (cameras) K1 and K2 that describes the partial transition effect, such as type of effect, eg fade-in, fade-out, length of effect T max and / or the start or end time of each partial effect. From the end time and duration of the effect, the start time in the respective video source can be determined.
  • type of effect eg fade-in, fade-out, length of effect T max and / or the start or end time of each partial effect.
  • a routine can be started on the camera, which (possibly in real time) affects the image processing.
  • This routine may be generally as a function f (k) where: f (k): Bk>B'k, T s ⁇ k ⁇ T s + T max are defined that the picture Bk, which is the time k recorded or played on which picture B'k depicts.
  • f, (k) For every possible partial effect i, a separate mapping f, (k) can be defined.
  • the image may include, for example, distortion, mosaic effects, or any other (sub) effects.
  • FIG. 3 shows a schematic comparison of the video source data streams 202a and 202b and the video output data stream 102 with reference to FIGS. 2a-d.
  • the signals 202a, 202b and 102 are synchronized, that is they have the same time base. For example, in each of the video source data streams 202a and 202b, at each time point / (each one (sub) image is
  • an overlay of the video source data stream 202a begins a transition effect having a duration 7 " max1
  • the modified video source data stream S'1 is received by the device 100.
  • a superposition of the video source data stream 202b begins with a transition effect having a duration of T max2 and until a time T s? _ + T max2 lasts.
  • the device 100 receives the modified video source data stream S'2.
  • the durations 7 ma , and T max2 may be the same or different and based on the respective transition effect or partial transition effect .
  • the video mixer switches over so that before time 7 the video output data stream 102 is based on the video source data stream 202a and, from time 7, on the video source stream 202b.
  • the time 7 S2 corresponds to the time 7 S + 7 mgx1 , so that the time 7 coincides with both times (7 S1 + 7 max1 and 7 S2 ).
  • the time course of the video output signal 02 before time 7 S1 corresponds to the situation as shown in FIG. 2a.
  • the situation from time 7 S1 to time 7 corresponds analogously to the situation of FIG. 2b. From time 7 to time T S2 + 7 max2 , the situation is exemplified in Fig. 2c. The situation for subsequent times, ie after the transition effect of the video source 202b ends, is shown in Figure 2d. In other words, Figures 2a-d and 3 show the overall process of generating a distributed transition effect. Before time 7 S1 , the video mixer outputs the unchanged video stream S1.
  • the video stream on the camera K1 is affected by the map ⁇ k) and is referred to as S'1.
  • the video mixer switches the output current to the output of the camera K2.
  • S'2 the video stream on the camera K2 by the image f 2 ⁇ k
  • the proposed concept allows for low-cost, mobile real-time video mixers, which can generate simple switching effects at the request of the operator (user). These are applicable, for example, in Life Video Content (LIF) video content production systems with multiple cameras using a mobile phone or a computer, a tablet PC, or the like as a video mixer.
  • LIF Life Video Content
  • embodiments of the present invention may also be implemented as program code or software.
  • aspects have been described in the context of a device, it will be understood that these aspects also constitute a description of the corresponding method, so that a block or a component of a device is also to be understood as a corresponding method step or as a feature of a method step , Similarly, aspects described in connection with or as a method step also represent a description of a corresponding block or detail or feature of a corresponding device.
  • embodiments of the invention may be implemented in hardware or in software.
  • the implementation may be performed using a digital storage medium, such as a floppy disk, a DVD, a Blu-ray Disc, a CD, a ROM, a PROM, an EPROM, an EEPROM or FLASH memory, a hard disk, or other magnetic disk or optical memory are stored on the electronically readable control signals that can cooperate with a programmable computer system or cooperate such that the respective method is performed. Therefore, the digital storage medium can be computer readable.
  • some embodiments according to the invention comprise a data carrier having electronically readable control signals capable of interacting with a programmable computer system such that one of the methods described herein is performed.
  • embodiments of the present invention may be implemented as a computer program product having a program code, wherein the program code is effective to perform one of the methods when the computer program product runs on a computer.
  • the program code can also be stored, for example, on a machine-readable carrier.
  • Other embodiments include the computer program for performing any of the methods described herein, wherein the computer program is stored on a machine-readable medium.
  • an embodiment of the method according to the invention is thus a computer program which has a program code for performing one of the methods described herein when the computer program runs on a computer.
  • a further embodiment of the inventive method is thus a data carrier (or a digital storage medium or a computer-readable medium) on which the computer program is recorded for carrying out one of the methods described herein.
  • a further embodiment of the method according to the invention is thus a data stream or a sequence of signals, which represent the computer program for performing one of the methods described herein.
  • the data stream or the sequence of signals may be configured, for example, to be transferred via a data communication connection, for example via the Internet.
  • Another embodiment includes a processing device, such as a computer or a programmable logic device, that is configured or adapted to perform one of the methods described herein.
  • a processing device such as a computer or a programmable logic device, that is configured or adapted to perform one of the methods described herein.
  • Another embodiment includes a computer on which the computer program is installed to perform one of the methods described herein.
  • a programmable logic device eg, a field programmable gate array, an FPGA
  • a field programmable gate array may cooperate with a microprocessor to perform one of the methods described herein.
  • the methods are performed by a any hardware device performed. This may be a universal hardware such as a computer processor (CPU) or hardware specific to the process, such as an ASIC.
  • CPU computer processor
  • ASIC application specific integrated circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Circuits (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Management Or Editing Of Information On Record Carriers (AREA)

Abstract

Selon l'invention, un dispositif pour générer un flux de données de sortie vidéo comprend une première et une deuxième entrée de signal pour recevoir un premier et un deuxième flux de données de source vidéo, un dispositif de processeur, qui est conçu pour mettre à disposition le flux de données de sortie vidéo à un premier moment, sur la base du premier flux de données de source vidéo et au moyen d'un processus de commutation à un deuxième moment, qui suit le premier moment, sur la base du deuxième flux de données de source vidéo. Le dispositif comprend en outre une sortie de signal de commande pour envoyer une commande à une source vidéo qui reçoit le premier ou le deuxième flux de données de source vidéo. La commande comprend une indication à la source vidéo pour utiliser un effet de transition, qui est disposé dans le temps entre une image du premier flux et une image du deuxième flux de données de source vidéo dans le signal de sortie vidéo.
EP15750990.2A 2014-10-08 2015-08-11 Dispositif pour générer un flux de données de sortie vidéo, source vidéo, système vidéo et procédé pour générer un flux de données de sortie vidéo ou un flux de données de source vidéo Withdrawn EP3204946A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014220423.2A DE102014220423A1 (de) 2014-10-08 2014-10-08 Vorrichtung zum Erzeugen eines Videoausgangsdatenstroms, Videoquelle, Videosystem und Verfahren zum Erzeugen eines Videoausgangsdatenstroms bzw. eines Videoquellendatenstroms
PCT/EP2015/068480 WO2016055195A1 (fr) 2014-10-08 2015-08-11 Dispositif pour générer un flux de données de sortie vidéo, source vidéo, système vidéo et procédé pour générer un flux de données de sortie vidéo ou un flux de données de source vidéo

Publications (1)

Publication Number Publication Date
EP3204946A1 true EP3204946A1 (fr) 2017-08-16

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Country Status (7)

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US (1) US20170213577A1 (fr)
EP (1) EP3204946A1 (fr)
JP (1) JP6545794B2 (fr)
KR (1) KR101980330B1 (fr)
CA (1) CA2963959A1 (fr)
DE (1) DE102014220423A1 (fr)
WO (1) WO2016055195A1 (fr)

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WO2016055195A1 (fr) 2016-04-14
KR101980330B1 (ko) 2019-05-20
CA2963959A1 (fr) 2016-04-14
JP6545794B2 (ja) 2019-07-17
US20170213577A1 (en) 2017-07-27
KR20170070111A (ko) 2017-06-21
DE102014220423A1 (de) 2016-04-14
JP2017536021A (ja) 2017-11-30

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