WO2009137919A1 - Mixage final vidéo - Google Patents

Mixage final vidéo Download PDF

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Publication number
WO2009137919A1
WO2009137919A1 PCT/CA2009/000647 CA2009000647W WO2009137919A1 WO 2009137919 A1 WO2009137919 A1 WO 2009137919A1 CA 2009000647 W CA2009000647 W CA 2009000647W WO 2009137919 A1 WO2009137919 A1 WO 2009137919A1
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WO
WIPO (PCT)
Prior art keywords
mixed
video
frames
mixing
application
Prior art date
Application number
PCT/CA2009/000647
Other languages
English (en)
Inventor
Richard Gratton
Keith Peters
Chris Allen
Simon Lord
Original Assignee
Xtranormal Technologie Inc.
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 Xtranormal Technologie Inc. filed Critical Xtranormal Technologie Inc.
Publication of WO2009137919A1 publication Critical patent/WO2009137919A1/fr

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    • 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

Definitions

  • the present invention relates to the field of creating videos comprising multimedia content.
  • a method for creating a video comprising: mixing down a plurality of media assets in order to obtain at least two mixed-down frames on a computer; transmitting the at least two mixed-down frames from the computer to a server; 0401
  • a system for creating a video comprising: a processor in a server; a memory accessible by the processor; communication means for receiving and transmitting data; and an application coupled to the processor, the application being configured for: receiving at least two mixed-down frames created from at least two media assets; mixing down the at least two mixed- down frames in order to obtain a mixed-down video and encoding the mixed-down video in a format adapted to be delivered as video over an Internet; and returning the mixed- down video to the computer via the communication means .
  • a system for creating a video comprising: a processor in a computer; a memory accessible by the processor; communication means for receiving and transmitting data,- and an application coupled to the processor, the application being configured for: mixing down a plurality of media assets stored in the memory in order to obtain at least two mixed-down frames; transmitting the at least two mixed-down frames to a server via the communication means,- and receiving a mixed-down video from the server via the communication means, the mixed-down video resulting from mixing down the at least two mixed-down frames and being encoded in a format adapted to be delivered as video over an Internet. 0401
  • a method for creating a video comprising: receiving, at a server and from a remote computer, at least two mixed- down frames created from at least two media assets; mixing down the at least two mixed-down frames in order to obtain a mixed-down video and encoding the mixed-down video in a format adapted to be delivered as video over an Internet; and returning the mixed-down video to the remote computer.
  • a method for creating a video comprising: mixing down, at a remote computer, a plurality of media assets stored in a memory in order to obtain at least two mixed-down frames; transmitting the at least two mixed-down frames to a server; and receiving, at the remote computer, a mixed-down video from the server, the mixed-down video resulting from mixing down the at least two mixed-down frames and being encoded in a format adapted to be delivered as video over an
  • media asset refers to visual and/or audio elements which can be stored in a memory of a computer.
  • media assets are video-only assets such as silent videos and movies, audio-only assets such as audio tracks, video-and-audio assets such as talking videos and movies, photographs, images, text, graphics, and the like.
  • frame refers to a single shot or sequence of a media asset.
  • a film frame is one of the many single photographic images in a motion picture. Usually, 24 film frames are needed for one second of film, however embodiments of the present invention should not be limited as such.
  • An audio sample is another example of a frame .
  • mixed-down refers to the action of combining several elements such as media assets and frames of media assets in order to obtain a single element.
  • a mixed-down frame is the result of the combination of several frames. Mixing-down several video frames results in a video and mixing-down several audio frames results in an audio track.
  • rendering is used to describe the process of calculating effects in a video editing file to produce final video output.
  • FIG. 1 is a flow chart illustrating a method of creating a video, in accordance with an embodiment of the present invention
  • FIG. 2 is a block diagram illustrating the splitting of a video into frames, in accordance with an embodiment of the present invention
  • FIG. 3 is a block diagram illustrating a mix-down of media assets in order to obtain a mixed-down frame, in accordance with an embodiment of the present invention
  • FIG. 4 is a block diagram illustrating a mix-down of mixed-down frames in order to obtain a mixed-down video, in accordance with an embodiment of the present invention
  • FIG. 5 is a block diagram illustrating the insertion of effects in a mixed-down video, in accordance with an embodiment of the present invention
  • Fig. 6 is a flow chart illustrating a method of creating a mixed-down video comprising a simplification step and a reconstruction step, in accordance with an embodiment of the present invention
  • Fig. 7 is a block diagram illustrating the simplification of mixed-down frames, in accordance with an embodiment of the present invention.
  • Fig. 8 is a block diagram illustrating an Edit Decision List, in accordance with an embodiment of the present invention.
  • FIG. 9 is a block diagram illustrating the reconstruction of mixed-down frames, in accordance with an embodiment of the present invention.
  • FIG. 10 is block diagram of a system for creating a mixed-down video, in accordance with an embodiment of the present invention.
  • Figure 1 illustrates a method 10 of creating a video according to one embodiment.
  • a user having a computer wants to create a personalized video.
  • the user uses a 0401
  • the browser-based application to create the video and connects to a server.
  • the application is accessed via web browser over a network such as the Internet or an intranet.
  • the user wants to add sound effects or a background image to an original video.
  • the original video may be a video filmed by the user or a video downloaded from the Internet, for example.
  • the original video and the media assets to be added to the video are stored in a memory of the user's computer. Alternatively, the original video and the media assets can be on the server.
  • the first step 12 of the method 10 is the creation of at least two mixed-down frames by combining the different media assets including the original video.
  • Frame mix-down refers to taking multiple media assets composed and/or edited into a single shot or sequence and combining them to obtain a single frame.
  • the original video is divided frame by frame, as illustrated in figure 2. If required, the media assets to be added to the original video are also divided frame by frame.
  • Figure 3 illustrates the creation of a mix- down for one frame 50a of the original video. For each frame 50a-e of the original video, the user superimposes a graphic (and/or text) 52, a picture 54, a background image 56 and/or an audio track 60. The superposition results in a mixed-down frame 60 which is encoded in a format adapted to be delivered as video over the Internet.
  • figure 1 refers to the creation of a personalized video using an original video
  • the mixed-down frame could be something other than a video-and-audio frame.
  • the mixed-down frame results from the combination of at least two media assets of the same 0401
  • the mixed-down frame could be a video-only frame or an audio-only frame.
  • An audio-only mixed-down frame results from the mix-down of at least two audio tracks having the same or a different format.
  • a video- only mixed-down frame may result from the mix-down of at least two videos having no sound track, at least two pictures, at least two graphics, or any combination of videos having no sound tracks, pictures and/or graphics.
  • original video 50 is in an flv format with or without alpha channel.
  • Original video 50 may comprise an audio track or not.
  • Graphic 52 is a vector data and may comprise text.
  • Picture 54 and background picture 56 may be in a GIF, PNG, or JPEG format, for example.
  • Audio track 60 may be in an flv format (without video) or any audio format known to a person skilled in the art such as mp3 , wav, ogg, oga, etc.
  • mixed-down frame 60 is a flattened frame, which means that it is in an flv format.
  • Other formats such as mp4 , m4v, m4a, 3gp, mov, f4v, f4p, f4a, f4b, and the like are also possible.
  • the next step 14 is the transmission of the mixed-down frames from the user's computer to a server.
  • the server receives the mixed-down frames and stores them in a memory.
  • the server combines the multiple mixed- down frames sequentially to obtain a mixed-down video which is first stored in the server memory before being sent to the user at step 18.
  • the mixed-down video is streamed directly from the server to the user's computer 0401
  • the mixed-down video is encoded in a format adapted to be delivered as video over the Internet.
  • the format of the mixed-down video is standard so that the mixed-down video can be played back by any generic media player.
  • the application that was used to create the mixed-down video is not required to render and play back the mixed-down video.
  • the mixed-down video can be played back without having to mix down the shots or timeline since the rendering has already been done during its creation. Consequently, the mixed-down video can be posted to generic video aggregation sites such as YoutubeTM, Google VideoTM, Yahoo! VideoTM, DailymotionTM, etc. Once the mixed-down video has been posted, a person can play back the mixed-down video since the application that was used to create it is not required.
  • Figure 4 illustrates one embodiment of the creation of a mixed-down video.
  • the server receives n mixed-down frames 10Oa-IOOn from the user's computer and saves them in memory.
  • the n mixed-down frames 10Oa-IOOn are combined sequentially two by two to result in m flattened videos 101 a-m.
  • the n mixed-down frames can be combined other than two by two . For example they could be combined three by three or four by four, etc.
  • the m flattened video 101a-m are combined sequentially to result in a single mixed-down video 102.
  • Mixed-down video 102 is encoded in a format adapted to be delivered as video over the Internet .
  • the mixed-down video 102 is created in a single step.
  • the n mixed-down frames 100a-n are 0401
  • the mixed-down video 102 is a flattened video, which means that it is in an flv format.
  • Other standard formats allowing the mixed-down video to be played back by any generic media player are also possible. Examples of other standard formats are mp4 , m4v, m4a, 3gp, mov, f4v, f4p, f4a, f4b, etc.
  • the user may insert effects into the video 102 as illustrated in figure 5.
  • Multiple effects can be inserted into the mixed-down video 102 such as track effects 150, 152, 154, transition effects 156 and audio effect 158.
  • Transition effects 156 are inserted between two successive frames of the mixed-down video 102. Because of the transition effects 156, two successive frames of the mixed-down video 102 overlap during the playback of the mixed-down video 102 and effects such as wiping or dissolving appear between the frames.
  • Audio effect 158 can be an audio bed behind the mixed-down video 102 and acting as background sound, for example. Other audio effects such as echo, flanger, filtering, chorus, and the like can be added.
  • Track effects 150, 152, and 154 refer to bitmap effects which have a defined duration independent of the duration of the frames constituting the mixed-down video 102.
  • Sepia tone effect, blur effect, saturation effect, brightness effect, grayscale effect, and the like are examples of track effects 150, 152, and 154.
  • the final mixed-down video comprising effects is encoded in a format adapted to be delivered as video over the Internet.
  • figure 5 refers to the insertion of effects once the mixed-down video has been created
  • the step of creating the mixed-down video using the mixed-down frames and the step of inserting effects can be combined into a single step.
  • the effects are inserted during the step of mixing down the mixed-down frames illustrated in figure 4.
  • the video obtained at the end of the creation of the mixed-down video is a mixed- down video comprising effects and being encoded in a format adapted to be delivered as video over the Internet.
  • the server offers a panel of effects that can be added during the creation of the mixed- down video.
  • the effects can be in an application on the user's computer and they are uploaded to the server.
  • the server returns in real-time the mixed-down video to the user.
  • the user can see in realtime the effects added to the video and change them if they are not satisfactory.
  • the user does not need to wait until the end of the process to view the mixed-down video.
  • the server returns the mixed-down video in the form of a video file in a format adapted to be delivered as video over the Internet. 0401
  • Figure 6 illustrates one embodiment of a method 170 of creating a mixed-down video comprising the steps of simplification and reconstruction of the mixed-down frames.
  • audio assets and visual assets are treated separately. If an asset such as a video contains both audio and video assets, this asset is broken down into an audio-only asset and a video-only asset. Any method known to a person skilled in the art to break down a video into a video-only asset and an audio-only asset may be used.
  • the first step is the creation of the video mixed-down frames using multiple media assets.
  • video-only mixed-down frames are created using the method illustrated in figure 3.
  • the audio-only assets are split in audio-only frames which are uploaded to the server if they are located on the user's computer.
  • the audio-only frames can be located on the server and the user selects the ones to be inserted into the mixed-down video.
  • Video-only mixed-down frames are encoded in a format adapted to be delivered as video over the Internet.
  • Audio frames can be in an audio format such as mp3 or wav format, for example. It should be noted that the audio frames may contain a single audio asset such as the soundtrack of a video, which is uploaded to the server from the user's computer or provided on the server.
  • the next step 174 is the simplification of the video-only mixed-down frames, of which an embodiment is illustrated in figure 7.
  • the creation of video-only mixed-down frames results in video-only mixed-down frame 200, video-only mixed- down frame 202 and video-only mixed-down frame 204 which are stored in the memory of the user's computer.
  • Video-only mixed-down frames 200, 202, 204 are subsequently converted into bitmaps which contain a plurality of bits such as tiles. Tiles of one bitmap are compared to tiles of a preceding bitmap and are stored in memory only if they are different.
  • video-only mixed-down frame 202 is converted to bitmap 206 which includes 9 tiles Tn to Ti 9 .
  • Each tile T ⁇ j of a bitmap represents a part of the corresponding video-only mixed-down frame and contains all data corresponding to that part of the video-only mixed-down frame.
  • Index i refers to the number of the video-only mixed- down frame and index j refers to the position of the tile in the bitmap.
  • Bitmap 208 is sent from the user's computer to the server. In the case of the first video-only mixed-down frame 200, all tiles Tn to Ti 9 of bitmap 208 are sent to the server.
  • the second video-only mixed-down frame 202 is also converted to a bitmap 210 comprising tiles T 21 to T 29 .
  • the tiles of bitmap 210 are compared to their corresponding tiles of the preceding bitmap 206.
  • Tile Tn is compared to tile T 2x
  • tile T 12 is compared to tile T 22
  • tile T 13 is compared to tile T 23 , etc.
  • Bitmap 212 represents the bitmap corresponding to video-only mixed-down frame 202 that is sent to the server.
  • Bitmap 212 only includes tiles T 25 and T 29 of bitmap 210 which are different from their corresponding tiles of bitmap 206. The same steps are performed for video-only mixed-down frame 15750401
  • Bitmap 214 includes tiles T 3I to T 39 which are compared to tiles T 2i to T 29 of bitmap 210. Only the tiles that are different are saved in bitmap 216 which includes tiles T 3I , T 37 , and T 39 . Bitmap 216 5 is then sent to the server.
  • tiles Tn to Ti 9 , T 25 , T 29 , T 31 , T 37 , and T 39 are compressed before being sent to the server.
  • the audio-only frames are0 sent to the server where they are mixed-down together in order to obtain an audio track for the mixed-down video (step 182) .
  • the audio-only frames are selected by the user amongst a selection of audio frames available on the server. This audio track is saved in memory as an audio file.5 Instructions relative to the audio-only frames are also sent to the server. These instructions may contain the order and timing of each audio-only frame, for example. It should be understood that the audio-only frames can be compressed before they are sent to the server and subsequently 0 decompressed by the server.
  • the instructions relative to the audio-only frames are comprised in an Edit Decision List
  • EDL of which an example is illustrated in figure 8.
  • the EDL is transmitted to the server prior to the creation of the5 mixed-down video.
  • the EDL can be sent to the server via Real Time Messaging Protocol in an amf3 format.
  • the mixed-down video is a silent video. Therefore, the steps 180 and 182 are not performed and the mixed-down video results from the mix- down of video-only mixed-down frames on the server.
  • bitmaps 208, 212, and 216 are sent to the server and stored in the server's memory. If received tiles Tn to Ti 9 , T 25 , T 29 , T 3I , T 37 , and T 39 are compressed, the server decompresses them before storing them in memory.
  • the server reconstructs a complete bitmap using tiles of a preceding bitmap, as illustrated in Figure 9. As bitmap 208 is complete (each position of the bitmap contains a tile) , the server recreates video-only mixed-down frame 200 and stores it in memory. Bitmap 212 is incomplete as only tile T 25 and T 29 are present.
  • the server fills the missing tiles T 2 i, T 22 , T 23 , T 24 , T 26 , T 27 , and T 28 with their corresponding tiles in the preceding bitmap 208.
  • Tn substitutes T 21
  • T 12 substitutes T 22
  • Ti 3 substitutes T 23 , etc, to give rise to bitmap 220.
  • Bitmap 216 is also incomplete as only tiles T 31 , T 37 and T 39 are present. The missing tiles are taken from the preceding bitmap 220.
  • Tile Ti 2 substitutes tile T 32 , tile T 13 substitutes tile T 33 , tile T 14 substitutes tile T 34 , tile T 25 substitutes tile T 35 , tile Ti6 substitutes tile T 36 , and tile T 18 substitutes tile T 38 .
  • This process results in complete bitmap 222 from which video- only mixed-down frame 204 can be reconstructed and stored in memory . 0401
  • figures 7 and 9 refer to dividing video-only mixed-down frames into tiles, it should be understood that any method for dividing the video-only mixed-down frames can be used. For example, they can be divided in columns or rows. The number of tiles, columns, or rows is chosen as part of a design choice. It should also be understood that the number of mixed-down frames 200, 202, 204 is exemplary only and can equal to any integer superior or equal to two.
  • the next step 184 is the creation of a mixed-down video using these reconstructed video-only mixed-down frames and the audio track as illustrated in figure 5. Effects can also be added to the video either during the creation of the mixed-down video or after the creation of the mixed-down video.
  • the resulting mixed-down video is encoded in a format adapted to be delivered as video over the Internet. No rendering process is required to play back the mixed-down video.
  • the last step 186 consists in returning the mixed-down video to the user.
  • the creation of the mixed-down video occurs in several steps.
  • a video track is created using the video-only mixed-down frames according to the method illustrated in figure 4.
  • the method illustrated in figure 5 can be used and effects are added to the video track. Sound effects can be added to the audio track created using the audio-only mixed-down frames.
  • the last step is the combination of the audio track with the video track to obtain the mixed-down video. 0401
  • Figure 10 illustrates one embodiment of a system 300 for creating a mixed-down video.
  • the system comprises a computer 302 in connection with a server 302.
  • Computer 302 and server 304 can be connected via an Internet connection or an intranet connection, for example.
  • Computer 302 is also connected to a monitor 320 and a command unit 322.
  • Computer 302 comprises a processor 306, a memory 308 and a communication unit 310.
  • Media assets used to create the mixed-down video are stored in memory 308.
  • An application coupled to processor 306 displays options such as a list of media assets on monitor 320. The user has access to all media assets stored in his computer via the application. A user selects the media assets to be used to create the mixed-down video via command unit 322.
  • Processor 306 has access to all media assets stored in memory 308. Furthermore, processor 306 is adapted to combine the media assets chosen by the user in order to obtain mixed-down frames according to the method illustrated in figure 3. The mixed-down frames are stored in memory 308 before being sent to server 304 through communication unit 310. 0401
  • the user clicks on a "render” button displayed on monitor 320 by the application coupled to processor 306 using command unit 322.
  • the trigger of the "render” button starts the process of creating the mixed-down video .
  • Communication unit 318 of server 304 receives the mixed-down frames and stores them in memory 316.
  • Processor 316 is adapted to combine the mixed-down frames stored in memory 316 in order to create a mixed-down video according to the method illustrated in figure 4.
  • the resulting mixed-down video is encoded in a format adapted to be delivered as video over the Internet and is stored in memory 316 before being sent to computer 302 through communication unit 318 or directly streamed to computer 302 without being saved in memory 316.
  • Communication unit 310 receives the mixed-down video and stores it in memory 308.
  • processor 306 is further connected to communication unit 310 and the mixed-down frames are directly sent to server 304 through communication unit 310 without being stored in memory 308.
  • processor 314 is further connected to communication unit 318 and the mixed-down video is sent directly to computer 302 without being stored in memory 316.
  • processor 314 is further adapted to add effects either during the creation of the mixed-down video or after the creation of the mixed-down video following 0401
  • the application coupled to processor 306 displays a list of effects that can be added to the video.
  • the user selects the effects to be inserted into the mixed-down video via command unit 322.
  • the user can also choose effect parameters such as the duration of an effect, the position of the effect within the video, etc.
  • the effects and their corresponding parameters are sent to server 318 via processor 306 and communication unit 310 prior to the creation the mixed-down video.
  • processor 306 is further adapted to break down media assets in order to obtain audio-only frames and video-only assets according to the method illustrated in figure 6.
  • Processor 306 is also adapted to simplify the video-only mixed-down frames according to the method illustrated in figure 7 and processor 314 is further adapted to reconstruct the video-only mixed-down frames according to the method illustrated in figure 8, to create the audio-only mixed-down frames, and to combine them with the audio-only mixed-down frames in order to obtain a mixed- down video encoded in a format adapted to be delivered as video over the Internet.
  • processor 306 is further adapted to create the audio-only mixed-down frames and to send them to processor 314 via communication units 310 and 318.
  • memory 308 is part of computer 302 in figure 10, it should be noted that memory 308 may be external to computer 302. 0401
  • computer 302 and server 304 are connected via the Internet.
  • the mix-down of media assets and the mix-down of frames is performed by a Flash runtime application.
  • the mixed-down format is encoded in a standard format and can be played on any generic player such as QuickTimeTM, Windows Media PlayerTM, RealplayerTM, KMplayerTM, etc.
  • the mixed-down frames are compressed by the user' s computer before being sent to the server and subsequently decompressed by the server before the creation of the mixed-down video.
  • the mixed-down video is compressed by the server before being sent to the user's computer.
  • the mixed-down video is then decompressed by the user's computer before being played back.
  • any elements transmitted between the computer 302 and the server 304 may be compressed before being sent and subsequently decompressed once received.
  • the processors 306 and 314 are adapted to compress and/or decompress the transmitted elements .

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

Abstract

L'invention porte sur un procédé de création d'une vidéo comprenant : le mixage final d'une pluralité de contenus multimédias afin d'obtenir au moins deux images de mixage final sur un ordinateur; la transmission des au moins deux images de mixage final de l'ordinateur à un serveur; le mixage final des au moins deux images de mixage final afin d'obtenir une vidéo de mixage final sur le serveur, et le renvoi de la vidéo de mixage final à l'ordinateur; les au moins deux images de mixage final et la vidéo de mixage final étant codées dans un format conçu pour être délivré sous forme de vidéo sur l'Internet.
PCT/CA2009/000647 2008-05-12 2009-05-12 Mixage final vidéo WO2009137919A1 (fr)

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US5255008P 2008-05-12 2008-05-12
US61/052,550 2008-05-12

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