WO2009045189A1 - Procédé et système pour faciliter une fonctionnalité de liste de lecture de transmission continue côté serveur à base de piste - Google Patents

Procédé et système pour faciliter une fonctionnalité de liste de lecture de transmission continue côté serveur à base de piste Download PDF

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Publication number
WO2009045189A1
WO2009045189A1 PCT/US2007/021203 US2007021203W WO2009045189A1 WO 2009045189 A1 WO2009045189 A1 WO 2009045189A1 US 2007021203 W US2007021203 W US 2007021203W WO 2009045189 A1 WO2009045189 A1 WO 2009045189A1
Authority
WO
WIPO (PCT)
Prior art keywords
media element
track
streaming
media
source corresponding
Prior art date
Application number
PCT/US2007/021203
Other languages
English (en)
Inventor
Michael Joseph Severa
David Kosiba
Original Assignee
Alcatel Lucent
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 Alcatel Lucent filed Critical Alcatel Lucent
Priority to PCT/US2007/021203 priority Critical patent/WO2009045189A1/fr
Publication of WO2009045189A1 publication Critical patent/WO2009045189A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H04N7/17318—Direct or substantially direct transmission and handling of requests
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
    • H04N21/26258—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists for generating a list of items to be played back in a given order, e.g. playlist, or scheduling item distribution according to such list
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/482—End-user interface for program selection
    • H04N21/4825—End-user interface for program selection using a list of items to be played back in a given order, e.g. playlists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/65—Transmission of management data between client and server
    • H04N21/658—Transmission by the client directed to the server
    • H04N21/6581—Reference data, e.g. a movie identifier for ordering a movie or a product identifier in a home shopping application

Definitions

  • the disclosures made herein relate generally to methods and systems for facilitating server- side streaming of playlist content and, more particularly, to methods and systems for allowing audio and video from separate sources to be concurrently streamed in a single playlist streaming session.
  • multimedia data e.g., audio, full-motion video, pictures, etc.
  • client device requesting the downloading of the multimedia data from a server. Once downloaded, the client can then consume, or present, the information.
  • This model is relatively easy to implement. However, it is non-optimal in that the client is required to wait for the downloading to complete before the presentation can begin. This delay can be considerable where large blocks of multimedia data are involved.
  • a more sophisticated model of producing information involves a content server at one network site "streaming" the multimedia information over the network to a client at another site.
  • Streaming is a process in which packets, sent over an Internet Protocol (IP)-based network, are used to present digital multimedia content continuously to a recipient client as it arrives in substantially real time as perceived by the user.
  • IP Internet Protocol
  • the client does not have to download and store a large file before displaying the digital multimedia content.
  • the client begins to present the digital multimedia content as it arrives (i.e., just-in-time rendering), rather than waiting for the entire data set to arrive before beginning presentation.
  • received data is buffered into a cache memory and continuously processed as soon as, or soon after, being received by the client for real time presentation of multimedia content.
  • Most streaming sessions include either live or video-on-demand (VOD) sources, and are typically associated with a single content source (i.e., a single VOD file or a single live source, e.g., a video camera).
  • VOD video-on-demand
  • a single content source i.e., a single VOD file or a single live source, e.g., a video camera.
  • multimedia streaming e.g., a first source for video content and a second source for audio content.
  • a "playlist” in its simplest form is a list of media that can be used to manage playback of local content (i.e., audio files) or to control the streaming media sessions.
  • playlists provide an extensible, dynamic method for delivering customizable audio and video content to users via streaming.
  • a playlist represents a list of the content items that a server can stream to a client, which can include a mixture of program content and advertisements (ads), for example.
  • a playlist can be used to play several short clips or to provide a user with long blocks of programming.
  • client-side playlists In a client-server streaming architecture, two types of playlists can be provided: client-side playlists and server-side playlists.
  • the main difference between the two types of playlists is that when the client-side playlists are used, a client player application has control of the streaming experience, whereas when server-side playlists are used, a streaming server has control of the streaming experience.
  • Server-side playlists provide the ability for the streaming server to combine streams from multiple sources (in sequence) and stream to a client in a single session.
  • the client need not (and may not even) be aware that there are multiple media sources. This is useful for providing ad insertion capability, or for applications where uninterrupted streaming (from multiple sources) is desired (i.e., where the client doesn't have to explicitly request streaming from each new source).
  • Prior art (i.e., known) server side playlist streaming functionality exhibit limitations associated with allowing audio and video content from separate (e.g., multiple audio content sources and multiple video content sources) to be mixed in a single playlist streaming session without having to merge the content into a single media file or single live source ahead of a time at which such content is streamed.
  • One such prior art solution to this problem is to create content in which video is imported from one or more sources and audio is imported from one or more other sources, and saving the resulting content as a single, audio-video (a/v) media file, which is then use that in the context of a playlist session. This resulting content file can then be simply streamed.
  • Embodiments of the present invention allow server-side playlist streaming functionality to be implemented in a manner allowing audio content and video content from separate sources to be mixed in a single playlist streaming session without having to merge the content into a single media file (i.e., media element file) or single live source ahead of a time where such audio and video content is streamed. More specifically, embodiments of the present invention extend known server- side playlist streaming functionality to allow audio and video content tracks to be specified separately, which is in contrast to prior art approaches that require audio and video content files to be specified as whole entities (i.e., a single media file a single live streaming source).
  • Embodiments of the present invention can rely upon server-side playlist streaming functionality being extended to allow audio and video tracks to be specified separately as opposed to the prior art functionality in which audio-video files must be specified as whole entities.
  • Such functionality extension requires modifying media element (i.e., track file) syntax to allow distinction of content based on track (audio, video, etc) as opposed to based on single files.
  • This extension can be done in the context of existing SMIL syntax (e.g., upon which the Packet Video Network Solutions brand playlist file syntax is based) or by adding new elements and/or semantics to syntax definition.
  • embodiments of the present invention advantageously overcome one or more limitations associated with prior art approaches for using server-side playlist streaming functionality to stream audio and video content from separate sources (e.g., files).
  • a method comprises a plurality of operations for allows server-side playlist streaming functionality to be implemented in a manner whereby audio content and video content from separate sources to be mixed in a single playlist streaming session without having to merge the content into a single media file or single live source ahead of a time where such audio and video content is streamed.
  • An operation is performed for receiving media element configuration information including a media element track identifier associated with a first track of a playlist and a media element track identifier associated with a second track of the playlist.
  • Receiving the media element configuration information is performed by a server capable of streaming media content.
  • an operation is performed for concurrently streaming at least a portion of a media element source corresponding to the media element track identifier associated with the first track and at least a portion of a media element source corresponding to the media element track identifier associated with the second track.
  • the streaming is carried out in accordance with commands issued by server-side streaming playlist functionality of a server capable of streaming media content.
  • the media element source corresponding to the media element track identifier associated with the first track and the media element source corresponding to the media element track identifier associated with the second track are different sources.
  • a set of processor-executable instructions are configured for allows server-side playlist streaming functionality to be implemented in a manner whereby audio content and video content from separate sources to be mixed in a single playlist streaming session without having to merge the content into a single media file or single live source ahead of a time where such audio and video content is streamed.
  • Instructions are performed for receiving media element configuration information including a media element track identifier associated with a first track of a playlist and a media element track identifier associated with a second track of the playlist.
  • Receiving the media element configuration information is performed by a server capable of streaming media content.
  • Instructions are provided for concurrently streaming at least a portion of a media element source corresponding to the media element track identifier associated with the first track and at least a portion of a media element source corresponding to the media element track identifier associated with the second track in a single streaming session.
  • the streaming is carried out in accordance with commands issued by server-side streaming playlist functionality of a server capable of streaming media content.
  • the media element source corresponding to the media element track identifier associated with the first track and the media element source corresponding to the media element track identifier associated with the second track are different sources.
  • a server capable of streaming media content is configured for receiving media element configuration information including a media element track identifier associated with a first track of a playlist and a media element track identifier associated with a second track of the playlist.
  • Receiving the media element configuration information is performed by a server capable of streaming media content.
  • the server is further configured for concurrently streaming at least a portion of a media element source corresponding to the media element track identifier associated with the first track and at least a portion of a media element source corresponding to the media element track identifier associated with the second track in a single streaming session.
  • the streaming is carried out in accordance with commands issued by server-side streaming playlist functionality of a server capable of streaming media content.
  • the media element source corresponding to the media element track identifier associated with the first track and the media element source corresponding to the media element track identifier associated with the second track are different sources.
  • FIG. 1 is a flow chart showing a method in accordance with an embodiment of the present invention, which allows server-side playlist streaming functionality to be implemented in a manner whereby audio content and video content from separate sources to be mixed in a single playlist streaming session without having to merge the content into a single media file or single live source ahead of a time where such audio and video content is streamed.
  • FIG. 2 is a diagrammatic view showing a media element track configuring interface in accordance with an embodiment of the present invention.
  • FIG. 1 is a flow chart showing a method 100 in accordance with an embodiment of the present invention.
  • the method 100 allows server-side playlist streaming functionality to be implemented in a manner allowing audio content and video content from separate sources to be mixed in a single playlist streaming session without having to merge the content into a single media file or single live source ahead of a time where such audio and video content is streamed.
  • the server-side playlist streaming functionality of a streaming server offered by Packet Video Network Solutions is an example of server-side playlist streaming functionality that can be configured to provide functionality in accordance with the present invention.
  • the method 100 begins with an operation 102 being performed for causing a media element track configuring interface to be displayed for allowing a user to configure media element tracks to be outputted in accordance with commands issued by a server-side streaming playlist.
  • the media element track configuring interface is configured in a manner allowing a plurality of media element tracks to be concurrently streamed in a single streaming session in accordance with commands issued by server-side streaming playlist functionality of a server capable of streaming media content. Allowing the user to specify the media element tracks includes allowing a media element track identifier corresponding to a first media element file to be specified and allowing a media element track identifier corresponding to a second media element file to be specified.
  • Examples of the media element tracks include, but are not limited to, media element tracks of an audio type, media element tracks of a video type, media element tracks of a static image type, media element tracks of a textual type, media element tracks of an animation type and the like. It is disclosed herein that causing the media element track configuring interface to be displayed can be initiated, controlled and/or facilitated by server-side functionality, client-side functionality, or both.
  • a server capable of streaming media content performs an operation 104 for receiving media element configuration information (i.e., playlist information) from the element track configuring interface.
  • media element configuration information includes the first and second media element track identifiers.
  • an operation 106 is performed for concurrently streaming all or a portion of the first and second media element files in a single streaming session, which includes accessing media element files corresponding to the media element track identifiers specified using the media element track configuring interface.
  • Streaming of the first and second media element files is carried out in accordance with commands issued by server-side streaming playlist functionality of the server capable of streaming media content and in accordance with the media element configuration information.
  • server-side streaming playlist functionality of the server capable of streaming media content and in accordance with the media element configuration information.
  • methods and syntax in accordance with the present invention can be associated with live sources as well as other known types of media element sources. Accordingly, the term 'file' is not intended to disallow that the source may be a live source as opposed to VOD (e.g., media element files) or other known types of media element sources.
  • media element source is disclosed herein to include media element files, live media element streams and the like.
  • the media element track configuring interface 200 is configured for allowing a plurality of media element tracks to be specified in a manner that allows them to be concurrently streamed in a single streaming session in accordance with commands issued by server-side streaming playlist functionality of a server capable of streaming media content. In this manner, the media element track configuring interface 200 is configured for allowing media element configuration information in accordance with the present invention to be generated.
  • the media element track configuring interface 200 includes a plurality of functionality selectors and media element configuration information fields. Selection of a 'Create Playlist' selector 202 allows a new playlist to be created. After a user selects the 'Create Playlist' selector 202, the user enters a maximum number of concurrent tracks that will streamed at any one time during a single streaming session into a ' Maximum Concurrent Tracks' field 204 and enters a name of the playlist being created into a 'Playlist Name' field 206. With the maximum number of concurrent tracks and playlist name specified, the media element track configuring interface 200 presents a plurality of media element track configuration blocks 208 for allowing information corresponding to the maximum number of concurrent tracks to be specified. Each one of the track configuration blocks 208 allows media element configuration information associated with each one of the tracks that will concurrently streamed at any one time during a single streaming session to be specified.
  • each one of the track configuration blocks 208 includes a plurality of functionality selectors and information fields, which includes the following functionality selectors and information fields.
  • a 'Type of Track' field 210 includes a plurality of selectable media element track types that a user can select.
  • the media element tracks include, but are not limited to, media element tracks of an audio type, media element tracks of a video type, media element tracks of a static image type, media element tracks of a textual type, media element tracks of an animation type and the like.
  • a particular type of media element track is specified to limit associated types of media element files (e.g., corresponding file extensions).
  • a particular type of media element track is specified for purposes of affecting creation of syntax representing the associated playlist. Accordingly, it is disclosed herein that specifying the type of media element track is useful for any number of reasons.
  • a 'Media Element File Identifier' field 212 is provided for allowing a media element file identifier corresponding to a respective media element file to be specified.
  • a media element track identifier will include a name of the respective media element file as well as a storage location required for allowing access thereto.
  • a 'Browse' selector 214 allows a user to browse storage devices (e.g., a hard drive, media storage server, and/or the like) and select media element track identifiers therefrom.
  • a 'Selected Track Files' field 216 is provided for allowing a user to view the media element track identifier(s) that are specified for a respective one of the track configuration blocks 208.
  • Each 'Selected Track Files' field 216 has a 'Play Time' field 218 associated therewith, which shows a system-computed play time (e.g., sum of play time durations) corresponding to the selected media element track identifiers(s). In this manner, a user is able to compare the playtimes for each of the track configuration blocks 208.
  • a ' Set File Timeline' selector 220 is provided for allowing timeline information associated with each one of the selected media element track identifiers to be specified. Examples of such timeline information include, but are not limited to, information specifying a sub-portions of each media element file to be streamed using attributes such as begin time, end time, duration, etc.
  • a 'Remove Selection' selector 222 is provided for allowing a selected media element track identifier to be removed after being selected.
  • a 'Save Playlist' selector 224 is provided for allowing a playlist to be saved and communicated to a prescribed streaming server configured for providing server-side playlist streaming functionality.
  • media element syntax examples of media element syntax in accordance with various embodiments of the present invention are discussed below. It is disclosed herein that, in one embodiment, selecting the 'Save Playlist' selector 224 of the media element track configuring interface 200 causes respective and appropriate media element syntax to be created dependent upon media element configuration information associated with the corresponding playlist. In this manner, it is disclosed herein that media element syntax in accordance with the present invention can be created using a media element track configuring interface in accordance with the present invention.
  • One approach for implementing media element syntax for allowing concurrent streaming of different media element content in a single streaming session is to modify prior art media element syntax to allow more distinction in how media element files of a playlist are streamed.
  • One embodiment of prior art media element syntax that allows an entire file, including both audio and video, to be referenced is:
  • a streaming server capable of interpreting such syntax would open both 'my_audio_file.3gp' and 'my_video_file.3gp' (i.e., media elements tracks), and combine these two media elements tracks (audio and video respectively) into a single streaming session (e.g., a 3GPP (3 rd Generation Partnership Project) streaming session).
  • a 3GPP (3 rd Generation Partnership Project) streaming session e.g., a 3GPP (3 rd Generation Partnership Project) streaming session.
  • Using the element tags ⁇ audio> and ⁇ video> would enable the 3gp files to actually contain other tracks that might not be used, for example, if one wished to play the music portion of a music video together with the video portion of a baseball broadcast including both audio and video content.
  • An embodiment of prior art media element syntax that has been modified in accordance with the present invention for allowing more distinction in how media element files of a playlist are streamed and for allowing a type of track (e.g., audio, video, etc) to be specified from a file capable of supporting multiple track types is:
  • Audio src file:///public/my_audio-video_music_file.3gp" />
  • video src file:///public/my_audio-video_baseball_file.3gp” /> ⁇ /media>.
  • Example 3 Using Element Tags For Track Duration Manipulation
  • the assumption is that audio and video tracks are presented at the same time in a streaming session.
  • the tracks are played in parallel or, in SMIL terms, the media element file is streamed in accordance with a timing behavior similar to parallel ⁇ par> streaming manner, as opposed to a sequence ( ⁇ seq>) streaming manner.
  • the 'my_audio-video_music_file.3gp' media element file and the 'my audio- video_baseball_file.3g' media element file can be different durations.
  • addressing such a configuration objective includes media element syntax that retains par-like timing, but allowing the audio and video media elements to be container elements that have sequence-like timing.
  • media element syntax is:
  • such media element syntax represents a set of baseball video highlights to which a number of music clips are "overdubbed".
  • this media element syntax would allow each of those media element tracks to remain integral media pieces and there is no requirement that an additional piece of media content containing all the concatenated components ever be produced.
  • using some of the other SMIL media timeline control elements could allow an even more intricate mechanism for audio and video mixing, including specifying sub- portions of each track using attributes such as begin, end, duration, etc (e.g., as depicted and discussed in reference to the 'Set File Timeline' selector of FIG. 2).
  • a streaming server configured in accordance with the media element syntax of Example 3 can support the functionality of track mixing, e.g., foreground and background audio and/or graphical and video overlays or mosaics.
  • the supported media types could include other "streamable" types such as, for example, timed text or similar.
  • Media Element syntax in accordance with the present invention can be configured for allowing specification of media element files based on the track ID values in such files.
  • One embodiment of such media element syntax is: ⁇ media>
  • This media element syntax is similar to the type of media element syntax used within a streaming session in general and is generally most useful when there is a need to specify one track to the exclusion of another. For example, the scenario where it is desirable to specify one track to the exclusion of another if there are more than one audio or video tracks in each of the media element files referenced above.
  • This media element syntax further allows referencing more than one track (i.e., sub-portion) from each media element file, such as depicted in the following media element syntax.
  • Example 4 the media element syntax disclosed in Example 4 is well-suited for implementation of playlist-based BSS (bitstream switching) control, where alternative bitrate tracks are specified as playlist information. This gives a client device the ability to choose among them and control BSS behavior and do so using existing signalling of server-side playlist streaming functionality of a server.
  • BSS bitstream switching
  • processor-executable sets of instructions are tangibly embodied by computer readable medium having instructions thereon that are configured for carrying out such functionality.
  • the instructions are tangibly embodied for carrying out the method 100, functionality provided for via the media element track configuring interface 200, and/or media element syntax disclosed herein.
  • the instructions can be accessible by one or more data processing devices from a memory apparatus (e.g.
  • embodiments of computer readable medium in accordance with the present invention include a compact disk, a hard drive, RAM or other type of storage apparatus that has imaged thereon a computer program (i.e., instructions) adapted for carrying out server-side playlist streaming functionality in accordance with the present invention, which includes method 100, functionality provided for via the media element track configuring interface 200, and/or media element syntax disclosed herein.
  • server-side playlist streaming functionality in accordance with the present invention provides for a flexible, low-overhead approach for creating new and mixed content from a set of separate, already existing sources.
  • server-side playlist streaming functionality can allow "editing" of personalized media timelines from low complexity devices, such as handheld digital output devices (e.g., MP3 devices) and cell phones because it requires neither a content acquisition step nor a content encoding step.
  • Such functionality would also be ideally suited for high volume media applications such as the streaming-based content unicasting via a subscriber community (e.g., a You- TubeTM like content unicasting concept).

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Databases & Information Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un serveur configuré pour recevoir des informations de configuration d'éléments multimédia comprenant un identifiant de piste d'éléments multimédia associé à une première piste d'une liste de lecture et un identifiant de piste d'éléments multimédia associé à une seconde piste de la liste de lecture. La réception des informations de configuration d'éléments multimédia est effectuée par un serveur capable de transmettre en continu un contenu multimédia. Le serveur est en outre configuré pour transmettre en continu de façon concurrente au moins une partie de sources d'éléments multimédia correspondant à des identifiants de piste d'éléments multimédia respectifs associés à des pistes respectives dans une session unique de transmission continue. La transmission continue est exécutée conformément à des commandes envoyées par une fonctionnalité de liste de lecture de transmission continue côté serveur de serveur capable de transmettre en continu un contenu multimédia. Les sources d'éléments multimédia correspondant à la première piste et la source d'éléments multimédia correspondant à la seconde piste sont des sources différentes.
PCT/US2007/021203 2007-10-02 2007-10-02 Procédé et système pour faciliter une fonctionnalité de liste de lecture de transmission continue côté serveur à base de piste WO2009045189A1 (fr)

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PCT/US2007/021203 WO2009045189A1 (fr) 2007-10-02 2007-10-02 Procédé et système pour faciliter une fonctionnalité de liste de lecture de transmission continue côté serveur à base de piste

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WO2013166785A1 (fr) * 2012-05-08 2013-11-14 中兴通讯股份有限公司 Procédé et dispositif de fourniture de service multimédia, et procédé et dispositif d'affichage de service multimédia
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EP2702769A1 (fr) * 2011-04-27 2014-03-05 Morega Systems Inc. Serveur de vidéo adaptatif à système de fichiers virtuels et procédés d'utilisation associés
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