JP2009284500A - 画像伝送装置 - Google Patents
画像伝送装置 Download PDFInfo
- Publication number
- JP2009284500A JP2009284500A JP2009159427A JP2009159427A JP2009284500A JP 2009284500 A JP2009284500 A JP 2009284500A JP 2009159427 A JP2009159427 A JP 2009159427A JP 2009159427 A JP2009159427 A JP 2009159427A JP 2009284500 A JP2009284500 A JP 2009284500A
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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
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2381—Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- 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
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
-
- 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
- H04L65/70—Media network packetisation
-
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
-
- 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
- H04N21/6437—Real-time Transport Protocol [RTP]
-
- 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
- H04N21/64746—Control signals issued by the network directed to the server or the client
- H04N21/64761—Control signals issued by the network directed to the server or the client directed to the server
- H04N21/64769—Control signals issued by the network directed to the server or the client directed to the server for rate control
-
- 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
- H04L65/1066—Session management
- H04L65/1101—Session protocols
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Communication Control (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
【解決手段】プロトコル制御部132は、設定されている要求間隔に従ってパケットデータを要求する複数のタイマー処理部139、および伝送路の破棄率情報と上記要求間隔に加算する遅延時間との関係を示すテーブルを記憶したメモリを有し、上記複数のタイマー処理部の各々は、それぞれの画像受信部からのパケットデータの送信要求があると、上記テーブルから上記画像受信部から送られてくる破棄率情報に対応する遅延時間を求めて、該遅延時間を上記要求間隔に加算し、加算された要求間隔の経過後に上記パケット処理部137を介してバッファ133からパケットデータを読み出し、上記要求のあったそれぞれの上記伝送路に伝送する。
【選択図】図2
Description
このようにIピクチャは、15ピクチャに1回存在し、これが繰り返される構成が一般的である。
(予想受信パケット数)=(最大シーケンス番号)−(最小シーケンス番号)+1
パケット破棄率は、以下のようにして求める。
(パケット破棄数)=(予想受信パケット数)−(実際の受信パケット数)
(パケット破棄率)=((パケット破棄数)/(予想受信パケット数))×255
また、破棄率送信間隔については、RFC1889、A.7RRCP送信間隔の計算に詳細に述べられているが、破棄率は、RTCPのRRパケットのヘッダーに含まれる情報で、約5秒間隔で送信している。
Claims (2)
- 画像信号を入力する画像入力手段と、上記画像信号が入力され、符号化し、伝送する画像伝送部と、上記画像伝送部からの符号化されたデータを伝送する複数の伝送速度の異なる伝送路と、上記伝送路にそれぞれ結合された画像受信部を有し、
上記画像伝送部は、上記画像信号をピクチャ単位にストリームデータに変換する符号化処理部と、上記符号化処理部で符号化されたストリームデータをパケット化して送信するプロトコル制御部を有し、
上記プロトコル制御部は、上記ストリームデータを蓄積するバッファと、該バッファに結合され、上記伝送路のそれぞれに上記バッファに蓄積されたパケットデータを読み出す複数のパケット処理部、設定されている要求間隔に従ってパケットデータを要求する複数のタイマー処理部、および上記伝送路の破棄率情報と上記要求間隔に加算する遅延時間との関係を示すテーブルを記憶したメモリを有し、
上記複数のタイマー処理部の各々は、上記それぞれの画像受信部からの上記パケットデータの送信要求があると、上記テーブルから上記画像受信部から送られてくる上記破棄率情報に対応する遅延時間を求めて、該遅延時間を前記要求間隔に加算し、加算された要求間隔の経過後に上記パケット処理部を介して上記バッファからパケットデータを読み出し、上記要求のあったそれぞれの上記伝送路に上記パケットデータを伝送すると共に、
上記プロトコル制御部は、更に、複数の上記伝送路に対応して複数のトリガー発生部を有し、上記それぞれのトリガー発生部は、所定間隔でトリガーパルスを発生し、上記タイマー処理部は、該トリガーパルスを受信すると、上記タイマー処理部で設定されている上記要求間隔を強制的に初期値に戻すことを特徴とする画像伝送装置。 - 請求項1記載の画像伝送装置において、
初期値に戻す前の直前の要求間隔を記憶するメモリを有し、
上記タイマー処理部は、要求間隔を初期値に戻した直後の破棄率が所定値以上であった場合は、上記要求間隔を上記メモリに記憶しておいた直前の要求間隔に戻すようにしたことを特徴とする画像伝送装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009159427A JP4850932B2 (ja) | 2003-05-23 | 2009-07-06 | 画像伝送装置 |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003145677 | 2003-05-23 | ||
JP2003145677 | 2003-05-23 | ||
JP2009159427A JP4850932B2 (ja) | 2003-05-23 | 2009-07-06 | 画像伝送装置 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004150024A Division JP4541758B2 (ja) | 2003-05-23 | 2004-05-20 | 画像伝送装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009284500A true JP2009284500A (ja) | 2009-12-03 |
JP4850932B2 JP4850932B2 (ja) | 2012-01-11 |
Family
ID=34090595
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2009159427A Expired - Fee Related JP4850932B2 (ja) | 2003-05-23 | 2009-07-06 | 画像伝送装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7433069B2 (ja) |
JP (1) | JP4850932B2 (ja) |
KR (1) | KR100602916B1 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4822952B2 (ja) * | 2006-06-26 | 2011-11-24 | 富士通セミコンダクター株式会社 | 符号化データ転送装置および符号化データ転送方法 |
WO2008087727A1 (ja) * | 2007-01-18 | 2008-07-24 | Panasonic Corporation | 通信装置及び電力供給方法 |
US8200959B2 (en) | 2007-06-28 | 2012-06-12 | Cisco Technology, Inc. | Verifying cryptographic identity during media session initialization |
US8417942B2 (en) * | 2007-08-31 | 2013-04-09 | Cisco Technology, Inc. | System and method for identifying encrypted conference media traffic |
US8837598B2 (en) * | 2007-12-28 | 2014-09-16 | Cisco Technology, Inc. | System and method for securely transmitting video over a network |
US20090169001A1 (en) * | 2007-12-28 | 2009-07-02 | Cisco Technology, Inc. | System and Method for Encryption and Secure Transmission of Compressed Media |
JP2011215707A (ja) * | 2010-03-31 | 2011-10-27 | Canon Inc | 画像処理装置、撮像装置、画像処理方法およびプログラム |
US9985864B2 (en) * | 2010-08-04 | 2018-05-29 | Keysight Technologies Singapore (Holdings) Pte. Ltd. | High precision packet generation in software using a hardware time stamp counter |
CN102075740A (zh) * | 2010-12-21 | 2011-05-25 | 佛山市顺德区必达电子科技有限公司 | 图片抓拍并传输的方法 |
GB2500875A (en) * | 2012-03-25 | 2013-10-09 | Christopher Michael Glaister | Protocol for packetizing image data and user data to send across a connection |
US20140003520A1 (en) * | 2012-07-02 | 2014-01-02 | Cisco Technology, Inc. | Differentiating Decodable and Non-Decodable Pictures After RAP Pictures |
JP6302209B2 (ja) * | 2013-10-28 | 2018-03-28 | キヤノン株式会社 | 画像処理装置、その制御方法、及びプログラム |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11284659A (ja) * | 1998-03-31 | 1999-10-15 | Canon Inc | 通信制御方法及びその装置及び記憶媒体 |
JP2002077260A (ja) * | 2000-08-31 | 2002-03-15 | Toshiba Corp | 画像伝送のためのシステムおよび方法 |
JP2003169090A (ja) * | 2001-11-30 | 2003-06-13 | Fujitsu Ltd | 伝送システム |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3609508B2 (ja) * | 1995-10-16 | 2005-01-12 | 日本システムウエア株式会社 | Mpeg2データ転送装置 |
JP3699910B2 (ja) * | 2000-10-31 | 2005-09-28 | 株式会社東芝 | データ伝送装置、データ伝送方法及びプログラム |
JP4255685B2 (ja) | 2002-02-18 | 2009-04-15 | 株式会社日立国際電気 | 画像伝送方法および画像伝送装置 |
JP4000895B2 (ja) * | 2002-04-23 | 2007-10-31 | 日本電気株式会社 | リアルタイム通信のためのビットレート制御方法および装置 |
US7558323B2 (en) * | 2002-11-27 | 2009-07-07 | Hitachi Kokusai Electric Inc. | Video data transmission method for changing transmission data amounts in accordance with a transmission speed and a transmission system therefor |
-
2004
- 2004-05-21 KR KR20040036227A patent/KR100602916B1/ko not_active IP Right Cessation
- 2004-05-21 US US10/849,988 patent/US7433069B2/en not_active Expired - Fee Related
-
2009
- 2009-07-06 JP JP2009159427A patent/JP4850932B2/ja not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11284659A (ja) * | 1998-03-31 | 1999-10-15 | Canon Inc | 通信制御方法及びその装置及び記憶媒体 |
JP2002077260A (ja) * | 2000-08-31 | 2002-03-15 | Toshiba Corp | 画像伝送のためのシステムおよび方法 |
JP2003169090A (ja) * | 2001-11-30 | 2003-06-13 | Fujitsu Ltd | 伝送システム |
Also Published As
Publication number | Publication date |
---|---|
KR20040101046A (ko) | 2004-12-02 |
JP4850932B2 (ja) | 2012-01-11 |
US7433069B2 (en) | 2008-10-07 |
US20050025048A1 (en) | 2005-02-03 |
KR100602916B1 (ko) | 2006-07-19 |
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