EP2090115A2 - Verfahren zur synchronisierung von szene-datenfiles und mediendatenströmen in einem unidirektionalen datenübertragungssystem - Google Patents
Verfahren zur synchronisierung von szene-datenfiles und mediendatenströmen in einem unidirektionalen datenübertragungssystemInfo
- Publication number
- EP2090115A2 EP2090115A2 EP07821876A EP07821876A EP2090115A2 EP 2090115 A2 EP2090115 A2 EP 2090115A2 EP 07821876 A EP07821876 A EP 07821876A EP 07821876 A EP07821876 A EP 07821876A EP 2090115 A2 EP2090115 A2 EP 2090115A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- data
- scene
- time
- transmitter
- receiver
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/23614—Multiplexing of additional data and video streams
- H04N21/23617—Multiplexing of additional data and video streams by inserting additional data into a data carousel, e.g. inserting software modules into a DVB carousel
-
- 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
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/2368—Multiplexing of audio and video streams
-
- 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
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/242—Synchronisation processes, e.g. processing of PCR [Programme Clock References]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4341—Demultiplexing of audio and video streams
Definitions
- the invention is in the field of telecommunications engineering and relates to a method for synchronizing temporally synchronized transmitted by a data carousel scene data files and / or their data packets with data packets of media data streams in a unidirectional data transmission system.
- unidirectional data transmission systems data is transferred from one sender to one or more receivers in a push process.
- data is transmitted in particular as streaming streams, in particular in the streaming method, which has the advantage that high demands on the accuracy of the data rate can be fulfilled, for example when the data rate is coupled to the system clock of the receiver.
- streaming methods today's audio and video streams are generally streamed to the receivers, with the data each being provided with timestamps indicating when they are relevant for presentation and / or decoding.
- a disadvantage of the streaming method is that the receivers may miss or incorrectly receive received data can not be retransmitted.
- a data transmission by the download method in which data in the form of data files or data objects are transmitted from the sender to the receiver and stored in the receiver.
- data in the form of data files or data objects are transmitted from the sender to the receiver and stored in the receiver.
- EPG electronic program guide
- the scene and media data can be streamed in parallel with the receiver so that they are at the beginning of the time range in which they are valid Receivers are available.
- RTP Real Time Transport Protocol
- NTP is a standard for synchronizing clocks in computer systems over packet-based communication networks, which is standardized as RFC 958.
- Sender Reports the time stamp format of NTP is used.
- HisTV One approach to solving this problem is known by an application called "HisTV” in which synchronization of scene states is realized by referencing NTP timestamps of the audio or video data stream in the description of the states of a scene.
- the object of the present invention is to provide a method for synchronizing scene scene data files describing a scene with media streams (audio / video data streams) of the scene.
- a method for synchronizing a plurality of data packets of at least one media data stream with at least one scene descriptive scene data files and / or their data packets in a unidirectional data transmission system.
- the at least one media data stream is transmitted continuously by a transmitter of the unidirectional data transmission system to at least one receiver of the unidirectional data transmission system in the streaming method.
- the unidirectional data transmission system may be a broadcast, multicast or unicast data transmission system.
- the scene data files or their data packets are transmitted by the transmitter by means of a data carousel to the at least one receiver in the download process.
- the data carousel for Transmission of the scene data files is suitable for cyclically repeating the scene data files, in each of which at least one scene containing the same descriptive scene data objects are transmitted to the at least one receiver.
- the data carousel is in the form of a so-called data object carousel, and consequently able to repeatedly transmit not only files but also directory structures in a cyclic manner.
- Data or data object carousels for cyclically repeating data transmission are specified as such, for example, in the DSM-CC (Data S_torage Media Command and Control) standard and are thus well known to those skilled in the art, so further explanation is unnecessary.
- Data carousels may also be based on flood and / or ALC (Asynchronous L_ayer (Coding) and / or LCT (L_ayer (Coding Transport).
- the data packets of the at least one media data stream are each provided with a first time mark related to a first reference time.
- the data packets of the scene data files and / or their data packets are each provided with a second time stamp, which are related to a (different from the first reference time) second reference time.
- At least one timestamp allocation data stream is transmitted in the streaming method from the sender to the receiver, in which the first timestamps of the data packets of the at least one media data stream and the second timestamps of the scene data files and / or of their data packets are each assigned to a third timestamp , which are related to a third reference time, so that over the third timestamps of the Zeitmarkenzu glovesschal- current, an assignment of the first timestamps to the second timestamps is possible.
- synchronization between pre-loaded scenes and streamed media data can thus advantageously be carried out flexibly in real time.
- additional content such as advertising blocks
- the synchronization can be handled as before in the streaming case.
- the scene data files are synchronized with the data packets of the at least one media data stream (synchronization at data file level). If the data packets of the scene data files are provided with second time stamps, the data packets of the scene data files are synchronized with the data packets of the at least one media data stream
- a separate time stamp allocation data stream is provided for each media data stream, which allows a simple implementation.
- the data packets of the at least one timestamp allocation data stream are generated and transmitted only when the data packets of the at least one media data stream assigned to the data packets of the timestamp allocation data stream are transmitted via the third time stamps of the third reference time.
- the invention further extends to a unidirectional data transmission system with a transmitter and at least one receiver, transmitter and receiver being designed to carry out a method as described above.
- the invention extends to a transmitter of a unidirectional data transmission system as described above, in which a machine-readable program code is executed, which contains control commands which cause the transmitter to carry out a method as described above. Furthermore, the invention extends to a machine-readable program code (computer program) for such a transmitter, which contains control commands which cause the transmitter to carry out a method as described above. In addition, the invention extends to a storage medium (computer program product) with such machine-readable program code stored thereon.
- the invention also extends to a receiver of a unidirectional data transmission system as described above, in which a machine-readable program code is executed, which contains control commands which cause the receiver to carry out a method as described above. Furthermore, the invention extends to a machine-readable program code (computer program) for such a receiver, which contains control commands which cause the transmitter to carry out a method as described above. In addition, the invention extends to a storage medium (computer program product) with such machine-readable program code stored thereon.
- FIG. 1 shows an exemplary embodiment of a unidirectional data transmission system according to the invention for illustrating an exemplary embodiment of the method according to the invention.
- FIG. 1 shows an exemplary embodiment of the non-directional data transmission system according to the invention denoted by the reference number 1.
- the data transmission system comprises a transmitter 2 (data carousel server) and a plurality of receivers 3, of which only one is shown in FIG.
- the data between transmitter 2 and receiver 3 are transmitted in the broadcast method, that is, sent from the transmitter 2 to the receivers 3 in the push method.
- the data transmission can be wireless or wired, which is not shown in detail in FIG.
- the data carousel or data object carousel of the transmitter 2 which may be specified in particular according to the standard format DSM-CC, or based on flood and / or ALC (Asychronous L_ayer (Coding) and / or LCT (L_ayer (Coding Transport) , are a plurality of scene data files AE, each containing one or more scene data objects for describing at least one same graphic scene and transmitted in cyclic repetition to the receiver 3.
- ALC Alchronous L_ayer (Coding)
- LCT L_ayer (Coding Transport)
- the temporal order for the cyclic transmission of the scene data files AE becomes after the first scene data file A, the third scene data file C after the second scene data file B, the fourth scene data file D after the third scene data file C, and the fifth scene data file E after the fourth scene data file D is sent out.
- FDT File Delivery T_able
- the scene data files AE and / or their data packets are each provided with a scene data file time stamp (time stamp) which is related to a scene data file reference time (time scale) ZS3.
- the transmitter 2 continues to transmit in the streaming method an audio data stream AS and a video data stream VS to the receiver 3.
- the data packets of the audio data stream AS are each provided with an audio data stream time stamp (time stamp) which is related to an audio data stream reference time (time scale) ZS1.
- time stamp time stamp
- ZS1 audio data stream reference time
- RTP timestamps based on RTP (Real T_ime Transport Protocol), which is standardized in RFC 3550 (RFC Request for Comments).
- RTP Real T_ime Transport Protocol
- the audio data stream reference time ZS1 is different from the video data stream reference time ZS2.
- the audio data stream reference time ZS1 and the video data stream reference time ZS2 are different from the scene data file reference time ZS3, respectively.
- Timestamp allocation data streams are transmitted to the receiver 3, namely a first timestamp allocation data stream SRA associated with the audio data stream AS, a second timestamp allocation data stream SRV associated with the video data stream VS and a third timestamp allocation data stream SRS associated with the scene data files.
- the data packets of the audio data stream AS take place for each audio data stream time stamp Assignment to a reference time timestamp (time stamp) of a common reference time (time scale) ZS *.
- Sender reports are sent here, which assign the RTP time stamps in the audio data stream to AS NTP time stamps.
- the second timestamp allocation data stream SRV which is assigned to the video data stream VS
- an assignment to the reference time timestamp (time stamp) of the common reference time (time scale) ZS * is carried out for each video data stream time stamp of the data packets of the video data stream VS.
- sender reports are sent which assign the RTP time stamps in the video data stream to VS NTP time stamps.
- the third timestamp allocation data stream SRS which is assigned to the scene data files AE
- an assignment to the reference time timestamp (time stamp) of the common reference time (time scale) ZS takes place for each scene data file timestamp of the scene data files AE and / or their data packets *.
- sender reports are sent, which assign the scene data file time stamps of the scene data files A-E and / or their data packets NTP time stamps.
- the first timestamp allocation data stream SRA assigns the RTP timestamps to NTP timestamps
- the RTP timestamps NTP timestamps are assigned by the second timestamp allocation data stream SRV
- the time stamps of the scene data files and / or the third timestamp allocation data stream SRS their data packets to NTP timestamps.
- the NTP timestamps of the first, second and third timestamp allocation data streams SRA, SRV, SRS each relate to the same time scale ZS *.
- the time scale ZS * can be found on the Receiving side are interpreted in terms of a clock or clock.
- the receiver 3 can use the common reference time ZS * to unambiguously assign the scene data files AE and / or their data packets to the data packets of the video and audio data streams VS, AS and synchronize in time the scene data files with the video and audio data streams for display and / or decoding and / or storage.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Television Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006051437 | 2006-10-31 | ||
| DE102007026531A DE102007026531A1 (de) | 2006-10-31 | 2007-06-08 | Verfahren zur Synchronisierung von Szene-Datenfiles und Mediendatenströmen in einem unidirektionalen Datenübertragungssystem |
| PCT/EP2007/061513 WO2008052932A2 (de) | 2006-10-31 | 2007-10-26 | Verfahren zur synchronisierung von szene-datenfiles und mediendatenströmen in einem unidirektionalen datenübertragungssystem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2090115A2 true EP2090115A2 (de) | 2009-08-19 |
Family
ID=39265055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07821876A Ceased EP2090115A2 (de) | 2006-10-31 | 2007-10-26 | Verfahren zur synchronisierung von szene-datenfiles und mediendatenströmen in einem unidirektionalen datenübertragungssystem |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8108539B2 (de) |
| EP (1) | EP2090115A2 (de) |
| JP (1) | JP5124584B2 (de) |
| CN (1) | CN101536531B (de) |
| DE (1) | DE102007026531A1 (de) |
| WO (1) | WO2008052932A2 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101946861B1 (ko) | 2011-09-21 | 2019-02-13 | 삼성전자주식회사 | 멀티미디어 방송 서비스의 미디어 데이터 동기화 방법 및 장치 |
| US9426196B2 (en) * | 2013-01-04 | 2016-08-23 | Qualcomm Incorporated | Live timing for dynamic adaptive streaming over HTTP (DASH) |
| US9432426B2 (en) * | 2013-02-04 | 2016-08-30 | Qualcomm Incorporated | Determining available media data for network streaming |
| US9699229B2 (en) * | 2014-01-16 | 2017-07-04 | Qualcomm Incorporated | Robust live operation of dash |
| CN109359689B (zh) * | 2018-10-19 | 2021-06-04 | 科大讯飞股份有限公司 | 一种数据识别方法及装置 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6195701B1 (en) * | 1994-03-16 | 2001-02-27 | International Business Machines Corporation | Method and apparatus for synchronization and scheduling of multiple data streams and real time tasks |
| US6480902B1 (en) * | 1999-05-25 | 2002-11-12 | Institute For Information Industry | Intermedia synchronization system for communicating multimedia data in a computer network |
| US6868440B1 (en) * | 2000-02-04 | 2005-03-15 | Microsoft Corporation | Multi-level skimming of multimedia content using playlists |
| JP2001359069A (ja) | 2000-04-13 | 2001-12-26 | Canon Inc | 情報処理装置及びその方法並びにプログラムコード、記憶媒体 |
| US6760749B1 (en) * | 2000-05-10 | 2004-07-06 | Polycom, Inc. | Interactive conference content distribution device and methods of use thereof |
| KR100352549B1 (ko) * | 2000-07-29 | 2002-09-12 | 주식회사 알티캐스트 | 어플리케이션 정의 화일을 이용한 디지털 방송용 컨텐츠데이터의 관리방법 및 그 시스템 |
| KR100436088B1 (ko) * | 2000-12-04 | 2004-06-14 | 주식회사 알티캐스트 | 디지털 방송용 컨텐츠 데이터의 재활용 방법 및 시스템 |
| JP2003259312A (ja) * | 2002-02-28 | 2003-09-12 | Lsi Japan Kk | 字幕番組データ変換装置 |
| US7143132B2 (en) * | 2002-05-31 | 2006-11-28 | Microsoft Corporation | Distributing files from a single server to multiple clients via cyclical multicasting |
| US7290057B2 (en) * | 2002-08-20 | 2007-10-30 | Microsoft Corporation | Media streaming of web content data |
| JP4001091B2 (ja) * | 2003-09-11 | 2007-10-31 | ヤマハ株式会社 | 演奏システム及び楽音映像再生装置 |
| ES2745045T3 (es) * | 2005-04-22 | 2020-02-27 | Audinate Pty Ltd | Red, dispositivo y método para transportar medios digitales |
-
2007
- 2007-06-08 DE DE102007026531A patent/DE102007026531A1/de not_active Withdrawn
- 2007-10-26 CN CN2007800407622A patent/CN101536531B/zh not_active Expired - Fee Related
- 2007-10-26 US US12/312,230 patent/US8108539B2/en not_active Expired - Fee Related
- 2007-10-26 JP JP2009533858A patent/JP5124584B2/ja not_active Expired - Fee Related
- 2007-10-26 EP EP07821876A patent/EP2090115A2/de not_active Ceased
- 2007-10-26 WO PCT/EP2007/061513 patent/WO2008052932A2/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008052932A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2010507952A (ja) | 2010-03-11 |
| JP5124584B2 (ja) | 2013-01-23 |
| CN101536531A (zh) | 2009-09-16 |
| US20100049863A1 (en) | 2010-02-25 |
| CN101536531B (zh) | 2011-12-14 |
| WO2008052932A3 (de) | 2008-10-23 |
| US8108539B2 (en) | 2012-01-31 |
| WO2008052932A2 (de) | 2008-05-08 |
| DE102007026531A1 (de) | 2008-05-08 |
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