Streaming Media Report Gr

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<p>Streaming media in education</p> <p>1</p> <p> Streaming Media ( ) </p> <p>: .. * .. * &amp; .***</p> <p> , , ** (...) </p> <p> . , .. .</p> <p>2</p> <p>Streaming media in education</p> <p>Copyright 2005</p> <p> . , Ph.D. . , M.Sc. Ph.D.</p> <p>email: gsioanni@upatras.gr email: d.m.garyfallidou@upatras.gr email: spiliot@otenet.gr</p> <p>:</p> <p>The Science Laboratory, Patras, Greece. (+30) 2610 997879 (+30) 2610 997595 (+30) 2610 997681</p> <p>Copyright This publication is protected by a creative commons licence (Attribution Non-Commercial ShareAlike 1.0) For the complete text and an explanation of what this means, visit http://creativecommons.org/licences/by-nc-sa/1.0/ : . , Ph.D. . , M.Sc. -, Ph.D.</p> <p> - Editing: . , Ph.D. . , M.Sc.</p> <p>Published by: Education Highway Innovation Centre for School and new Technology Haffenstrasse 47-51 A-4020, Linz, Austria ISBN: 3-9500247-4-3 Linz 2005</p> <p>Streaming media in education</p> <p>3</p> <p>1 1.1 1.2 1.3 1.4 2 streaming media ( ) . streaming media ( ). streaming: streaming media. 13 13 14 15 18 22 22 23</p> <p> (streaming technology): 2.1 Internet is a best-effort network ( ).</p> <p>2.2 Discreet media versus Continuous media; (i.e. time-discreet versus time-based media). (.. ).</p> <p>2.3 Real time delivery versus soft-real-time delivery (VoD). ( 24 ) 2.4 2.5 Streaming versus downloading data. ( ). Pipelining ( ) 24 25</p> <p>2.6 streaming servers ( ) streaming systems ( ). 25 2.7 2.8 Lossless versus lossy compression ( ) 26 27</p> <p>2.9 Symmetric and non-symmetric compression algorithms ( - 29 ) 2.10 Multiplexing audio streams with video streams to create media-streams ( 30 ) 2.11 Redundancies exploited for achieving high compression ratios ( ) 31</p> <p>2.12 Lost packets, quality degradation, and Group Of Pictures (GOP) ( , 33 , ) 2.13 Constant-bit-rate (CBR) versus constant quality (VBR) codecs (/ 34 / ) 2.14 Real life choices: encode for the lowest client bit-rate, encode multiple versions, or choose multirate-encoding ( : , 35 , ) 2.15 2.16 2.17 3 Interoperability of streaming media components ( ) Streaming over TCP/IP and UDP/IP ( TCP/IP UDP/IP) Specialised streaming protocols ( ) 36 37 38 41 41 41 42 43 44 47</p> <p> 3.1 3.2 3.3 3.4 3.5 3.6 (transmissive) (The discovery model) (Constructivist view) </p> <p>4</p> <p>Streaming media in education 3.7 Reflexivity, social constructivism and sociocultural approaches. , 3.8 (ICT) 49 50</p> <p>4 streaming media 52 ( ) 4.1 4.2 52 53</p> <p>4.3 : 56 ; 4.4 4.5 4.6 : (explanatory learning) 58 62 63 64 66 67 69 70 , 60</p> <p>4.7 : (Object Oriented Programming, OOP) 4.8 : 4.9 : , 4.10 4.11 5 (blended learning) </p> <p> : 5.1 5.2</p> <p> streaming media . 70 streaming . 71</p> <p>5.3 : 73 ( ) 5.4 5.5 5.6 5.7 Streaming already existing short video clips ( video clip) Streaming already existing longer videos ( ) media (): media , ; Consulting an online library ( ) 74 74 78 79 80 80 81 81 82</p> <p>5.8 Capturing an educational event and producing a streaming medium ( , ) 5.9 () streaming medium ( ) 5.10 5.11 5.12 video-clips ( ) clips video stream .</p> <p>5.13 virtual library ( ) : 84 5.14 : 84 5.15 streaming media ( ): 88 . 5.16 5.17 5.18 : (standards) (multimedia formats) 92 95 , , , streaming media ( )93</p> <p>Streaming media in education 6 streaming media ( ) . 6.1 - : AiT 6.1.1 6.1.2 6.1.3 (Project based teamwork) 6.1.4 ( ) 6.1.5 . 6.2 - CSP 6.2.1 6.2.2 6.2.3 6.2.4 ( ) 6.3 CSP2 6.3.1 6.3.2 . 6.3.3 6.3.4 ( ) 6.4 Eduhi 1 6.4.1 6.4.2 6.4.3 6.4.4 ( ) 6.5 Eduhi 2 6.5.1 6.5.2 6.5.3 6.5.4 ( ) 6.6 Mayo Education Centre 6.6.1 6.6.2 6.6.3 6.6.4 6.7 Swedish TelePedagogic Knowledge Centre: , 6.7.1 6.7.2 6.8 6.9 6.10 7 : streaming media 1 : streaming media 2 : streaming media 3</p> <p>5 97 97 97 98 99 100 100 101 101 103 104 105 106 106 107 107 108 109 110 111 111 112 112 113 114 114 115 115 116 117 118 120 121 121 122 124 125 128 129 131 132 132</p> <p> 7.1 7.2 </p> <p>7.3 . (Pre test) 134 7.3.1 ? 134 7.3.2 ? 135 7.3.3 ? 136 7.3.4 ; 137 7.3.5 (internet)? 138 7.3.6 ; 139 7.3.7 ; 140 7.3.8 141 ; 7.3.9 ;142</p> <p>6</p> <p>Streaming media in education , 144 . , . 7.3.10 ; 144 7.3.11 146 ; 7.3.12 streaming media? (.. server 147 internet) 7.4 : Post test 7.4.1 ; 7.4.2 ; 7.4.3 ; 7.4.4 - ; 7.4.5 ; ( ) 7.4.6 ; 7.5 8 . 148 148 149 152 153 154 155 156 159 159 160 160 160 161 161 162 162</p> <p> streaming media 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 : Bandwidth ( ) ( ) web Streaming or downloading ( )? whiteboards</p> <p> data bases ( ) streamable media, . 162</p> <p>8.10 E-beams and other alternatives offering interactivity of a sort (e-beams 164 ). 8.10.1 Whiteboard conversion kits: e-streams and the like ( whiteboard: e-streams ) 165 8.10.2 165 8.10.3 Wireless graphics pads ( ) 166 8.10.4 Tablet PCs 166 8.11 8.12 8.13 Mobile computing, laptops notebooks etc. ( , laptotps, notebooks ...) Tablet PCs media players 166 166 167</p> <p>8.14 Personal digital assistants PDAs, and Palm-top computers ( PDAs, 167 Palm-top ) 8.15 8.16 8.17 Streamed vector-based animations 167 169 170 171 172 streaming (.. ) 169</p> <p>8.18 Streamed three-dimensional video images (holographic video images): 3D-TV ( , 3D-TV) 8.19 8.20 Virtual reality (VR) ( ) Blogs, Vlogs, media blogs and all that, using RSS</p> <p>Streaming media in education</p> <p>7</p> <p>8.21 Real time translation and real time subtitling ( , 173 ) 8.22 Extending the software categories that utilise streaming media educationally ( streaming media) 9 10 173 174 175</p> <p>8</p> <p>Streaming media in education</p> <p> streaming media ( ) e-stream (Minerva) ( ). , : , , , , , . streaming media ( ) . (.. ), . . . , streaming media ( ). streaming (): streaming () , streaming media ( ). ( ) streaming media ( ). ( ) : . ! (ICT). , (blended learning), streaming media ( ) . , (e-learning) streaming media ( ). streaming media ( ) . , , . , , streaming media ( ), </p> <p>Streaming media in education</p> <p>9</p> <p> streaming media ( ). , ( ), . , , , streaming media ( ), . streaming media ( ). - (e-stream Minerva). streaming media ( ) . , e-stream. ( ) . , . . (error bars) . . . , , , . Streaming media ( ) , ( ) . , . . , -, , (ICT). streaming media ( ) . streaming media ( ) streaming media ( ). , , : 1. : video DVDs streaming media ( ); 2. : , , streaming media ( ) ; ( ); ( ) medium () ;</p> <p>10</p> <p>Streaming media in education</p> <p> : streaming media; ; ; ; streaming media; ; streaming media ;</p> <p>Streaming media in education</p> <p>11</p> <p> e- stream (Minerva). - e-stream. : Anton Knierzinger, Caroline Weigner, and Petra Reiter Education Highway - Centre of Innovation for School and New Technology Ltd, Austria Helena Bijnens, Mathy Vanbuel, and Sally Reynolds ATiT - Audiovisual Technologies, Informatics and Telecommunications, Belgium Erica Lavagno, Eleonora Panto, and Augusta Giovannoli CSP s.c.a r.l. Innovazione nelle ICT, Italy Art Silleabhin Mayo Education Centre, Ireland Kennet Lindquist and Anna-Kaarina Lindquist, Swedish TelePedagogic Knowledge Centre, Sweden Rosetta McLeod, 8, .... , , . 6 . : , , pre-test ( ) , . K, . : Dr. , , , , , ... , streaming media, . 5.15 . K M streaming media . . , Minerva, e-stream, , . .</p> <p>12</p> <p>Streaming media in education</p> <p> . medium ( media) ( ), , .. , , , . streaming , .. , . streaming media , , () , ( ...) . , , . streaming media . streaming media , , , () () ( .. ) . , streaming media, (digital streaming media), , , , ( ), . , (internet) ( ) ( WiFi, WiMax, ...), .</p> <p>. .1 ..</p> <p> .. </p> <p>13</p> <p>1 M. &amp; . , ..... </p> <p>1.1 streaming media ( ) . - , . 1. ( ) broadband () internet (). multimedia ( ) . web-based video-on-demand ( ) . , . 2. , . : . . streaming , . steaming media on demand ( ) 3. streaming media (ICT) . , . 4 streaming media1</p> <p>Angelopoulos B.G, Garyfallidou D.M, Ioannidis G.S, Streaming media in education, In: Auer M. and Auer U. (Eds.) Proc International Conference ICL 2004: Interactive Computer Aided Learning, Kassel University Press (2004) ISBN 3-89958-089-3 2 Ibid. (i.e. in the same publication as the previous one) 3 Ibid. 4 Ibid.</p> <p>14</p> <p>Streaming media in education</p> <p> , . , streaming medium . , streaming media () (ICT) , internet transmitted media ( ) streaming media 5. internet transmitted media ( ) () VCR videos; ( ) "streamable media", . VCR videos : . , , , . : ) , ) , ) . e-streaming (Minerva 6). IP- delivered streaming media ( ) . . streaming media . , , .</p> <p>1.2 streaming media ( ). '80 , . . . , . - (videoconferencing) . , , broadband () , xDSL., , , (UDP/IP or TCP/IP) . , , 5</p> <p>Angelopoulos B.G, Garyfallidou D.M, Ioannidis G.S, Streaming media in education, In: Auer M. and Auer U. (Eds.) Proc International Conference ICL 2004: Interactive Computer Aided Learning, Kassel University Press (2004) ISBN 3-89958-089-3 eStream Increasing the use of Streaming media in school education in Europe 110160-CP-1-2003-1-ATMINERVA-M</p> <p>6</p> <p>. .1 ..</p> <p> .. </p> <p>15</p> <p> streaming media. bandwidth ( - ), , . "circuit switched", packet switching, . streaming media ( ), , .</p> <p> , web , . WEB streaming media . internet browsers, streaming media , , text conferencing, whiteboards, -, .. , ( ). 7,8 streaming media . streaming media .</p> <p>1.3 streaming: streaming ( ) , (taken) internet. "" (taken) internet, (downloading), (. downloading) streaming. . , , . 9 streaming, internet () . (stream) . . O media player, . media player (browser), ( ). 10 , . O streaming technologies ( ) (7</p> <p>Thornhill S., Asensio M., &amp; Young C., (eds.) Video Streaming, a guide for educational development, Click and go video project, www.ClickandGoVideo.ac.uk, (2002), ISBN 0 9543804-0-1, pp. 10, and 21</p> <p>Bijnens H., Bijnens ., Vanbu ., Streaming media in the classroom, Austria: EDUCATION HIGHWAY Innovation Centre. (2004), ISBN: 3-9500247-3-59</p> <p>8</p> <p>Angelopoulos B.G, Garyfallidou D.M, Ioannidis G.S, Streaming media in education, In: Auer M. and Auer U. (Eds.) Proc International Conference ICL 2004: Interactive Computer Aided Learning, Kassel University Press (2004) ISBN 3-89958-089-3 Ibid.</p> <p>10</p> <p>16</p> <p>Streaming media in education</p> <p> ) streaming server ( ) buffer ( ) ( ). () buffer. streaming medium . 11 live streaming () on demand ( ) . VoD Streaming: Video On Demand ( ) streaming server ( ), . VoD "soft-real-time delivery", streaming media (), . VoD - (single-viewer), "video multicasting on demand". , multicasting, "private broadcasting" ( ). VoD, on demand ( ) . (.. link - -) media server ( ) streaming medium. server video clip . Live streaming: ( ) , real time ( ) server ( ) . , (.. ), server ( ). "" streaming medium, : streaming server "" data stream ( ), . o data stream ( ), - , , , ( ) server ( ) (.. ). server ( ), , ( ). ( ) . , (.. ) ( ) . , (live streamed) "go back" .</p> <p>11</p> <p>Ibid.</p> <p>. .1 ..</p> <p> .. </p> <p>17</p> <p>RTSP (Real Time Streaming Protocol) (client - server application-level) OSI ( 2), (multimedia) streaming media IP. HTTP, ( HTTP) (bits) server ( ) (client computer). , VCR (.. , ....). RTSP (multisession), UDP TCT ( 2.17). Unicasting , server ( ) , server . , , clip: (stop), (Pause), (Positioning), . Multicasting -, . , . (private broadcasting). ( ) , ( on-demand multicasting scheme) stream () . , ! streaming TCP/IP , ( ) ( ) TCP/IP . streaming . , UDP/IP streaming...</p>

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