JP2004007823A - データ伝送方法および装置 - Google Patents
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Abstract
【解決手段】 本発明は複数のデータフレームからなるデータストリームの形で映像データを授受する方法および装置に関する。各フレームには優先度レベルが割り当てられている。非信頼性伝送路を通じてデータフレームが送出され受け側で受け取られなければ、欠けているデータフレームの優先度レベルを優先度閾値と比較し、優先度レベルが優先度閾値より高ければ、欠けているデータフレームを再送する。再送決定は送り側か受け側のどちらかで行われる。好ましい実施形態では、送出される全てのデータフレームの優先度レベルを閾値と比較する。優先度を決定するために、使用可能な伝送路帯域幅の計測に基づいて、つまり、先に送出されたフレームのビットレートに基づいて優先度閾値を算出する。さらに、再送決定時に、再送されるデータフレームの到着時間の推定を行ってもよい。
【選択図】 図8
Description
120 映像源アプリケーション
130 送信バッファ装置
140 伝送路アクセス制御装置
150 伝送路
160 ビデオクライアント
170 受信バッファ装置
180 映像表示アプリケーション
210 制御装置
220 再送信バッファ
230 受信バッファ装置
240 紛失検出装置
250 送信バッファ装置
260 伝送路アクセス制御装置
Claims (12)
- 送信側からパケット単位でデータを受信するデータ伝送方法であって、
パケットの紛失の有無を決定するステップと、
伝送路状態と、紛失したパケットの重要度とに基づいて、紛失したパケットの再送要求を行うか否かを決定するステップと、
前記再送要求を行うと決定した場合に送信側へ前記再送要求を送信するステップと、
前記再送要求に基づいて送信側から再送されてきたパケットを受信するステップとを備えたことを特徴とするデータ伝送方法。 - 前記伝送路状態は、使用可能な伝送路帯域幅であることを特徴とする請求項1記載のデータ伝送方法。
- 前記伝送路状態は、伝送路の伝送遅延であることを特徴とする請求項1記載のデータ伝送方法。
- 前記伝送路状態は、伝送路のビット誤り率であることを特徴とする請求項1記載のデータ伝送方法。
- 前記再送要求を行うか否かの決定は、さらに、先行して受信したパケットのビットレートに基づいてなされることを特徴とする請求項1記載のデータ伝送方法。
- 前記再送要求は、非受領(NACK)パケットであることを特徴とする請求項1記載のデータ伝送方法。
- 送信側からパケット単位でデータを受信する受信装置であって、
パケットの紛失の有無を決定し、かつ伝送路状態と、紛失したパケットの重要度とに基づいて、紛失したパケットの再送要求を行うか否かを決定する紛失検出装置と、
前記再送要求を行うと決定した場合に送信側へ前記再送要求を送信する送信バッファ装置と、
前記再送要求に基づいて送信側から再送されてきたパケットを受信する受信バッファ装置とを備えたことを特徴とする受信装置。 - 前記伝送路状態は、使用可能な伝送路帯域幅であることを特徴とする請求項7記載の受信装置。
- 前記伝送路状態は、伝送路の伝送遅延であることを特徴とする請求項7記載の受信装置。
- 前記伝送路状態は、伝送路のビット誤り率であることを特徴とする請求項7記載の受信装置。
- 前記再送要求を行うか否かの決定は、さらに、先行して受信したパケットのビットレートに基づいてなされることを特徴とする請求項7記載の受信装置。
- 前記再送要求は、非受領(NACK)パケットであることを特徴とする請求項7記載の受信装置。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00104388A EP1130839B1 (en) | 2000-03-02 | 2000-03-02 | Method and apparatus for retransmitting video data frames with priority levels |
Related Parent Applications (1)
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JP2001057722A Division JP4623616B2 (ja) | 2000-03-02 | 2001-03-02 | データ伝送方法および装置 |
Publications (2)
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JP2004007823A true JP2004007823A (ja) | 2004-01-08 |
JP3598110B2 JP3598110B2 (ja) | 2004-12-08 |
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JP2001057722A Expired - Fee Related JP4623616B2 (ja) | 2000-03-02 | 2001-03-02 | データ伝送方法および装置 |
JP2003294181A Expired - Fee Related JP3598110B2 (ja) | 2000-03-02 | 2003-08-18 | データ伝送方法および装置 |
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JP2001057722A Expired - Fee Related JP4623616B2 (ja) | 2000-03-02 | 2001-03-02 | データ伝送方法および装置 |
Country Status (4)
Country | Link |
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US (3) | US6792470B2 (ja) |
EP (2) | EP1130839B1 (ja) |
JP (2) | JP4623616B2 (ja) |
DE (1) | DE60020672T2 (ja) |
Cited By (4)
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JP2007522727A (ja) * | 2004-01-30 | 2007-08-09 | ヒューレット−パッカード デベロップメント カンパニー エル.ピー. | データパケットに関する情報を使用してデータパケットの送信順序を決定する方法およびシステム |
JP2008312125A (ja) * | 2007-06-18 | 2008-12-25 | Canon Inc | 映像受信装置及び映像受信装置の制御方法 |
JP2014090433A (ja) * | 2006-04-12 | 2014-05-15 | Tq Delta Llc | パケット再送信ならびにメモリの共有 |
US9069718B2 (en) | 2004-10-12 | 2015-06-30 | Tq Delta, Llc | Resource sharing in a telecommunications environment |
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GB0016695D0 (en) * | 2000-07-08 | 2000-08-23 | Radioscape Ltd | Digital transactions for the delivery of media files |
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US7042848B2 (en) * | 2001-05-04 | 2006-05-09 | Slt Logic Llc | System and method for hierarchical policing of flows and subflows of a data stream |
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US6904057B2 (en) * | 2001-05-04 | 2005-06-07 | Slt Logic Llc | Method and apparatus for providing multi-protocol, multi-stage, real-time frame classification |
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US7958532B2 (en) | 2001-06-18 | 2011-06-07 | At&T Intellectual Property Ii, L.P. | Method of transmitting layered video-coded information |
EP1271955A3 (fr) * | 2001-06-26 | 2007-05-02 | Koninklijke Philips Electronics N.V. | Procédé de transmission par paquet avec requetes en retransmission de paquet et mécanisme de controle relatif à la transmission de telles requètes |
US7363569B2 (en) | 2001-06-29 | 2008-04-22 | Intel Corporation | Correcting for data losses with feedback and response |
KR20030004978A (ko) * | 2001-07-07 | 2003-01-15 | 삼성전자 주식회사 | 이동 통신시스템에서 초기전송 및 재전송 방법 |
US8943540B2 (en) | 2001-09-28 | 2015-01-27 | Intel Corporation | Method and apparatus to provide a personalized channel |
EP1301041A1 (en) * | 2001-10-05 | 2003-04-09 | Matsushita Electric Industrial Co., Ltd. | Video data transmission method and apparatus |
US20030078983A1 (en) * | 2001-10-23 | 2003-04-24 | Sullivan Terence Sean | Message prioritization and buffering in a limited network |
JP4549610B2 (ja) | 2001-11-08 | 2010-09-22 | ソニー株式会社 | 通信システム、通信方法、送信装置および方法、受信装置および方法、並びにプログラム |
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JP3757857B2 (ja) * | 2001-12-12 | 2006-03-22 | ソニー株式会社 | データ通信システム、データ送信装置、データ受信装置、および方法、並びにコンピュータ・プログラム |
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2001
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2003
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US8737219B2 (en) | 2004-01-30 | 2014-05-27 | Hewlett-Packard Development Company, L.P. | Methods and systems that use information about data packets to determine an order for sending the data packets |
JP2007522727A (ja) * | 2004-01-30 | 2007-08-09 | ヒューレット−パッカード デベロップメント カンパニー エル.ピー. | データパケットに関する情報を使用してデータパケットの送信順序を決定する方法およびシステム |
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US10044473B2 (en) | 2006-04-12 | 2018-08-07 | Tq Delta, Llc | Packet retransmission and memory sharing |
JP2014090433A (ja) * | 2006-04-12 | 2014-05-15 | Tq Delta Llc | パケット再送信ならびにメモリの共有 |
US9749235B2 (en) | 2006-04-12 | 2017-08-29 | Tq Delta, Llc | Packet retransmission |
US10484140B2 (en) | 2006-04-12 | 2019-11-19 | Tq Delta, Llc | Packet retransmission and memory sharing |
US10498495B2 (en) | 2006-04-12 | 2019-12-03 | Tq Delta, Llc | Packet retransmission |
US10833809B2 (en) | 2006-04-12 | 2020-11-10 | Tq Delta, Llc | Techniques for packet and message communication in a multicarrier transceiver environment |
US9485055B2 (en) | 2006-04-12 | 2016-11-01 | Tq Delta, Llc | Packet retransmission and memory sharing |
US11362765B2 (en) | 2006-04-12 | 2022-06-14 | Tq Delta, Llc | Packet retransmission using one or more delay requirements |
US9094348B2 (en) | 2006-04-12 | 2015-07-28 | Tq Delta, Llc | Packet retransmission |
US12101188B2 (en) | 2006-04-12 | 2024-09-24 | Tq Delta, Llc | Multicarrier transceiver that includes a retransmission function and an interleaving function |
JP2008312125A (ja) * | 2007-06-18 | 2008-12-25 | Canon Inc | 映像受信装置及び映像受信装置の制御方法 |
Also Published As
Publication number | Publication date |
---|---|
DE60020672D1 (de) | 2005-07-14 |
EP1361690A2 (en) | 2003-11-12 |
EP1130839A1 (en) | 2001-09-05 |
DE60020672T2 (de) | 2005-11-10 |
EP1361690B1 (en) | 2006-01-11 |
US6877038B2 (en) | 2005-04-05 |
EP1130839B1 (en) | 2005-06-08 |
US6792470B2 (en) | 2004-09-14 |
EP1361690A3 (en) | 2004-04-07 |
US20040025184A1 (en) | 2004-02-05 |
US20020004838A1 (en) | 2002-01-10 |
JP4623616B2 (ja) | 2011-02-02 |
US20050144643A1 (en) | 2005-06-30 |
JP3598110B2 (ja) | 2004-12-08 |
JP2001274861A (ja) | 2001-10-05 |
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