JP2014522594A - マルチメディア・コンテンツをストリーミングする方法および装置 - Google Patents
マルチメディア・コンテンツをストリーミングする方法および装置 Download PDFInfo
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- 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
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- 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
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- 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
- H04L65/612—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for unicast
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- 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
- H04L65/613—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for the control of the source by the destination
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] networks
- H04L67/1044—Group management mechanisms
- H04L67/1053—Group management mechanisms with pre-configuration of logical or physical connections with a determined number of other peers
- H04L67/1055—Group management mechanisms with pre-configuration of logical or physical connections with a determined number of other peers involving connection limits
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- 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
- H04N21/2401—Monitoring of the client buffer
-
- 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
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- 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
- H04N21/6106—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
- 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
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- Computer Networks & Wireless Communication (AREA)
- Databases & Information Systems (AREA)
- Physics & Mathematics (AREA)
- Computing Systems (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
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Abstract
【選択図】図5
Description
複数のアクティブな送信者からの総計ダウンローディング速度は、受信者側ピアAにおけるビデオ・コンテンツの再生速度と等しい、または、バッファ占有レベルに従って増加または減少される。例えば、DBA_desiredおよびDCA_desiredを、それぞれ、送信者側ピアBおよびCの最大の利用可能なアップローディング速度とすることができ、DDA_desiredは、総計レートの残存レートである。
例えば、送信者側ピアBに送信されるインデックスは1であり、送信者側ピアCに送信されるインデックスは2であり、送信者側ピアDに送信されるインデックスは3である。これは、メッセージ内の第1の速度が送信者側ピアBのためのものであり、第2の速度が送信者側ピアCのためのものであり第3の速度が送信者側ピアDのためのものであることを意味し、これらを、各送信者側ピアが自己の速度を見つけるために使用することができる。
全体のビデオ・コンテンツを、複数の部分またはセグメントに分割することができ、この複数の部分またはセグメントは、1つの送信者側ピアまたは複数の異なる送信者側ピアからリクエストすることができる。このインデックスは、受信者側ピアに送信される部分またはセグメントを選択するために各アクティブな送信者側ピアによって使用される。
sは、ビット単位でのパケットのサイズであり、
RTTは、秒単位での往復時間であり、
pは、損失イベント率であり、
tRTOは、秒単位でのTCP再伝送タイムアウト値であり、経験的には、tRTO=4*RTTである。
L_smoothed(t)=a*L(t)+(1−a)*L_smoothed(t−T) (2)
ここで、aは、平滑化効果を調節するために使用される0と1の間の係数であり、当業者によって選択可能である。aの値が小さいと、平滑化効果がより少なくなり、最近のバッファ・レベルの変化に対する応答性が高い。aの値が大きいと、平滑化効果がより大きくなり、最近のバッファ・レベルの変化に対する応答性が低い。
例えば、
ケース1:L_smoothed(t)がLTとHTの間に存在する場合には、
Dj_target=rとなる。
ケース2:L_smoothed(t)がLT未満またはLTを超える場合には、
Dj_target=r+(V/2−L_smoothed(t))/Tとなる。
ここで、V/2は、サイズVを有するバッファの半分のレベルである。Tは、バッファ・レベル・チェッキング期間または目標ダウンローディング速度調節期間である。
L_smoothed(t)=a*L(t)+(1−a)*L_smoothed(t−T) (2)
ここで、aは、平滑化効果を調節するために使用される0と1の間の係数であり、当業者によって選択可能である。aの値が大きいと、平滑化効果がより少なくなり、最近のバッファ・レベルの変化に対する応答性が高い。aの値が小さいと、平滑化効果がより大きくなり、最近のバッファ・レベルの変化に対する応答性が低い。
Claims (9)
- 少なくとも1つの送信者側ピアから受信者側ピアへのマルチメディア・コンテンツをストリーミングする方法であって、
前記受信者側ピアの前記マルチメディア・コンテンツの再生速度とバッファ占有レベルとに従って、前記少なくとも1つの送信者側ピアから前記受信者側ピアへの前記マルチメディア・コンテンツの目標ダウンローディング速度を周期的に取得するステップと、
前記少なくとも1つの送信者側ピアの各々から前記受信者側ピアへの前記データ伝送状況と前記取得した目標ダウンローディング速度とに従って、前記少なくとも1つの送信者側ピアの各々から前記受信者側ピアへのダウンローディング速度を決定するステップと、
前記少なくとも1つの送信者側ピアから前記受信者側ピアへ前記マルチメディア・コンテンツを前記それぞれ決定したダウンローディング速度でストリーミングするステップと、を含む、前記方法。 - 前記決定するステップは、前記各送信者側ピアから前記受信者側ピアへの前記データ伝送状況に従って、前記少なくとも1つの送信者側ピアの各々に対する最適化されたダウンローディング速度を取得するステップと、
前記最適化されたダウンローディング速度および前記取得された目標ダウンローディング速度の総計に基づいて前記少なくとも1つの送信者側ピアの各々に対する前記ダウンローディング速度を決定するステップと、を含む、請求項1に記載の方法。 - 前記決定するステップの後、前記少なくとも1つの送信者側ピアの数を更新するステップと、最小の数のアクティブな送信者側ピアを使用するステップと、をさらに含む、請求項1または2に記載の方法。
- 新たな送信者側ピアを追加するステップまたは前記少なくとも1つの送信者側ピアから送信者側ピアを削除するステップをさらに含む、請求項3に記載の方法。
- 前記目標ダウンローディング速度を周期的に取得するステップは、前記バッファ占有レベルが所定の閾値(LT、HT)の範囲内にある場合に前記マルチメディア・コンテンツの前記再生速度を前記目標ダウンローディング速度として使用するステップと、前記バッファ占有レベルが所定の閾値の範囲外にある場合に前記バッファ占有レベルに関する値によって前記目標ダウンローディング速度を増加または減少させるステップと、を含む、請求項1〜4のいずれか1項に記載の方法。
- 前記決定するステップは、前記取得するステップの後に、前記取得ステップと同じ期間で周期的に実行される、請求項1〜5のいずれか1項に記載の方法。
- 前記データ伝送状況は、往復時間、損失イベント率、および、前記少なくとも1つの送信者側ピアの各々から前記受信者側ピアへの再伝送タイムアウト値、を含む、請求項1〜6のいずれか1項に記載の方法。
- 前記少なくとも1つの送信者側ピアの各々からの前記最適化されたダウンローディング速度は、伝送制御プロトコル(TCP)・フレンドリ速度制御(TFRC)によって取得される、請求項2〜6のいずれか1項に記載の方法。
- 請求項1〜8のいずれか1項に記載のマルチメディア・コンテンツをストリーミングする方法を使用したマルチメディア通信システムにおける受信者側ピア。
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PCT/CN2011/074987 WO2012162882A1 (en) | 2011-05-31 | 2011-05-31 | Method and apparatus for streaming multimedia contents |
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EP (1) | EP2715987B1 (ja) |
JP (1) | JP2014522594A (ja) |
KR (1) | KR20140031916A (ja) |
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US9374406B2 (en) * | 2012-02-27 | 2016-06-21 | Qualcomm Incorporated | Dash client and receiver with a download rate estimator |
US9450997B2 (en) | 2012-02-27 | 2016-09-20 | Qualcomm Incorporated | Dash client and receiver with request cancellation capabilities |
CN111385315B (zh) * | 2018-12-27 | 2022-12-16 | 阿里巴巴集团控股有限公司 | 点对点资源下载方法和装置 |
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WO2006075559A1 (ja) * | 2005-01-11 | 2006-07-20 | Matsushita Electric Industrial Co., Ltd. | 通信方法および受信端末 |
US20080037527A1 (en) * | 2006-07-27 | 2008-02-14 | The Hong Kong University Of Science And Technology | Peer-to-Peer Interactive Media-on-Demand |
WO2010084034A1 (en) * | 2009-01-20 | 2010-07-29 | Thomson Licensing | Method for controlling a flow in a packet switching network |
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- 2011-05-31 JP JP2014513023A patent/JP2014522594A/ja active Pending
- 2011-05-31 EP EP11866932.4A patent/EP2715987B1/en not_active Not-in-force
- 2011-05-31 WO PCT/CN2011/074987 patent/WO2012162882A1/en active Application Filing
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WO2006075559A1 (ja) * | 2005-01-11 | 2006-07-20 | Matsushita Electric Industrial Co., Ltd. | 通信方法および受信端末 |
US20080037527A1 (en) * | 2006-07-27 | 2008-02-14 | The Hong Kong University Of Science And Technology | Peer-to-Peer Interactive Media-on-Demand |
WO2010084034A1 (en) * | 2009-01-20 | 2010-07-29 | Thomson Licensing | Method for controlling a flow in a packet switching network |
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US20140101330A1 (en) | 2014-04-10 |
EP2715987A1 (en) | 2014-04-09 |
KR20140031916A (ko) | 2014-03-13 |
WO2012162882A1 (en) | 2012-12-06 |
CN103597847A (zh) | 2014-02-19 |
EP2715987A4 (en) | 2014-11-05 |
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