WO2014188664A1 - Système de diffusion, client, programme de synchronisation et procédé de synchronisation - Google Patents

Système de diffusion, client, programme de synchronisation et procédé de synchronisation Download PDF

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Publication number
WO2014188664A1
WO2014188664A1 PCT/JP2014/002330 JP2014002330W WO2014188664A1 WO 2014188664 A1 WO2014188664 A1 WO 2014188664A1 JP 2014002330 W JP2014002330 W JP 2014002330W WO 2014188664 A1 WO2014188664 A1 WO 2014188664A1
Authority
WO
WIPO (PCT)
Prior art keywords
broadcast data
synchronization
packet
transmission
estimation
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
Application number
PCT/JP2014/002330
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English (en)
Japanese (ja)
Inventor
山崎　靖久
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.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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 Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of WO2014188664A1 publication Critical patent/WO2014188664A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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]
    • H04N21/60—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 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6125—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via Internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/18—Arrangements for synchronising broadcast or distribution via plural systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/80—Responding to QoS
    • 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
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2402—Monitoring of the downstream path of the transmission network, e.g. bandwidth available
    • 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
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44209—Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network
    • 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
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44245—Monitoring the upstream path of the transmission network, e.g. its availability, bandwidth
    • 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 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
    • H04N21/6175—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving transmission via Internet
    • 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 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/632—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing using a connection between clients on a wide area network, e.g. setting up a peer-to-peer communication via Internet for retrieving video segments from the hard-disk of other client devices
    • 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 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64322—IP
    • 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 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
    • H04N21/64723—Monitoring of network processes or resources, e.g. monitoring of network load
    • H04N21/64738—Monitoring network characteristics, e.g. bandwidth, congestion level

Definitions

  • the packet interval control unit 12 controls the transmission interval as described above, and when no queuing delay occurs in any client even if the transmission interval is gradually reduced to the minimum level.
  • the video packet is transmitted with a transmission interval smaller than the minimum.
  • the packet interval control unit 12 increases or decreases the transmission interval of video packets in this way.
  • the broadcast data server 101 gradually decreases the transmission interval of video packets, but conversely, it may be gradually increased. Further, the transmission interval of video packets may be constant. Even if the transmission interval of video packets is constant, the bandwidth estimation unit 22 can determine whether or not a queuing delay occurs at the constant transmission interval.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

La présente invention porte sur un système de diffusion au moyen duquel un délai de mise en file d'attente est corrigé et une précision de synchronisation est améliorée sans causer d'accroissement de gigue de paquets de synchronisation. Un serveur de données de diffusion (101) joue également le rôle d'un dispositif maître qui envoie des paquets de synchronisation à une pluralité de clients (102, 103) afin de se synchroniser avec les clients (102, 103) jouant le rôle de dispositifs esclaves. Le serveur de données de diffusion (101) comprend une unité d'émission (13) qui envoie une pluralité de paquets vidéo et des paquets de synchronisation à la pluralité de clients (102, 103) à des intervalles d'envoi respectivement différents. Les clients (102, 103) comprennent des unités d'estimation de bande passante (22) qui réalisent des estimations de bande passante d'un réseau IP sur la base d'intervalles de réception des paquets vidéo, et des unités de correction d'informations temporelles (23) qui corrigent des informations temporelles des paquets de synchronisation sur la base du résultat de l'estimation de bande passante.
PCT/JP2014/002330 2013-05-20 2014-04-25 Système de diffusion, client, programme de synchronisation et procédé de synchronisation Ceased WO2014188664A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-106537 2013-05-20
JP2013106537A JP2016136652A (ja) 2013-05-20 2013-05-20 放送システム、クライアント、同期プログラム、及び同期方法

Publications (1)

Publication Number Publication Date
WO2014188664A1 true WO2014188664A1 (fr) 2014-11-27

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PCT/JP2014/002330 Ceased WO2014188664A1 (fr) 2013-05-20 2014-04-25 Système de diffusion, client, programme de synchronisation et procédé de synchronisation

Country Status (2)

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JP (1) JP2016136652A (fr)
WO (1) WO2014188664A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017034305A (ja) * 2015-07-28 2017-02-09 ソフトバンク株式会社 通信装置、システム及び方法
EP4601223A4 (fr) * 2022-10-27 2026-01-14 Guangdong Oppo Mobile Telecommunications Corp Ltd Procédé et appareil de synchronisation d'horloge, système, dispositif et support de stockage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6943143B2 (ja) * 2017-10-31 2021-09-29 株式会社豊田自動織機 産業車両用遠隔操作システム、産業車両、産業車両用遠隔操作プログラム及び産業車両用遠隔操作方法
JP7278074B2 (ja) * 2018-12-27 2023-05-19 キヤノン株式会社 時刻同期システム及び時刻同期システムの制御方法、放射線撮影システム、時刻クライアント、時刻クライアントの制御方法
CN110493658A (zh) * 2019-08-20 2019-11-22 武汉兴图新科电子股份有限公司 一种网络带宽侦测方法、设备及存储设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0545624B2 (fr) * 1985-02-12 1993-07-09 Asahi Chemical Ind
JP2012156829A (ja) * 2011-01-27 2012-08-16 Brother Ind Ltd 符号化装置、符号化方法、および符号化プログラム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0545624B2 (fr) * 1985-02-12 1993-07-09 Asahi Chemical Ind
JP2012156829A (ja) * 2011-01-27 2012-08-16 Brother Ind Ltd 符号化装置、符号化方法、および符号化プログラム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017034305A (ja) * 2015-07-28 2017-02-09 ソフトバンク株式会社 通信装置、システム及び方法
EP4601223A4 (fr) * 2022-10-27 2026-01-14 Guangdong Oppo Mobile Telecommunications Corp Ltd Procédé et appareil de synchronisation d'horloge, système, dispositif et support de stockage

Also Published As

Publication number Publication date
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