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INTERNATIONAL TELECOMMUNICATION UNION ITU-T H.242 TELECOMMUNICATION (03/93) STANDARDIZARON SECTOR OF ITU LINE TRANSMISSION OF NON-TELEPHONE SIGNÁIS SYSTEM FOR ESTABLISHING COMMUNICATION BETWEEN AUDIOVISUAL TERMINALS USING DIGITAL CHANNELS UP TO 2 Mbit/s ITU-T Recommendation H.242 (Previously "CCITT Recommendation")
FOREWORD Che ITU Telecommunication Standardizatíon Sector (ITU-TJ is a permanent organ of the International Telecomnunication Union. The ITU-T ís responsible for studying technical, operating and tariff questions and issuing ilecommendations on them with a view to standardizing telecommunications on a worldwide basis. rhe World Telecommunication Standardizaron Conference (WTSC), which meets every four years, established the opics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. TU-T Recommendation H.242 was revísed by the'ITU-T Study Group XV (1988-1993) and was approved by the VTSC (Helsinki, March 1-12, 1993). NOTES As a consequence of a reform process withín the International Telecommunication Union (ITU), the CCITT eased to exist as of 28 February 1993. In íts place, the ITU Telecommunication Standardízation Sector (ITU-T) was reated as of 1 March 1993. Similarly, in this reform process, the CCIR and the IFRB have been replaced by the Ladiocommunication Sector. El order not to delay publícation of this Recommendation, no change has been made in the texí to references containing le acronyms "CCITT, CCIR or IFRB" or their associated entities such as Plenary Assembly, Secretariat, ele. Future ditions of this Recommendation will contain the proper terminology related to the new ITU structure. In this Recommendation, the expression "Administration" is used for conciseness to indícate both a ilecommunication administration and a recognized operating agency. © ITU 1994 11 rights reserved. No part of this publication may be reproduced or utilized in any form or by any ineans, electronic or
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ESCUELA POLITÉCNICA NACIONAL FACUL
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2.2.2 Clasificación de los servici
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ESTUDIO Y PLANIFICACIÓN DE UN MODE
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CAPITULO I 1.- PRINCIPIOS DE FUNCIO
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Para el proceso de liberación de l
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1.2 NORMAS DE COMUNICACION.- Los co
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• Control de Sistema: unidad que
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2. Para múltiples canales de B/H0|
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1.3.- ALGORITMOS DE CODIFICACIÓN Y
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quiere decodificar, el rendimiento
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Codificador de Capa Diferencial .1
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entrada son formateados para la com
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modelos toman ventaja de la baja se
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Quinto. La estructura y los paráme
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de búsqueda. La mayoría de aplica
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avanzada) o del recuadro de referen
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LA RED DIGITAL DE SERVICIOS INTEGRA
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2.1.1 Establecimiento de una RDSI.-
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SoT a) Escenario Irrtercerrtrales b
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2.2 VÍDEO COMUNICACIONES EN LA RDS
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A continuación se describe el tipo
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2.3.2 RDSI de Banda Ancha (RDSIBA).
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ealizar enlaces de comunicación en
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Esto era imposible para una red STM
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ase de la estructura de esta aplica
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Esta aplicación genera muchos y mu
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CAPITULO III 3.1. EL VIDEO TELÉFON
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3.1.1.3 Modo de Operación.- Para e
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El video teléfono Picasso esta com
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Pórtico Paralelo Procesador Host M
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Mbytes de memoria para compresión
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mouse que permite realizar este tip
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eco de la habitación, permitiendo
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obtener una buena imagen, un correc
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El circuito de procesador lo diseñ
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Tx Fkj. 3.5 Diagrama de bloques del
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VIDEOCONFERENC1AS PUNTO A PUNTO A T
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video en software se apoyan por lo
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ejemplo, una empresa de diseño pod
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CAPITULO IV ESTUDIO Y PLANIFICACIÓ
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Para realizar la transmisión de'in
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Características de las Fibras Máx
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RELLENO DE GRASA FIBRA DE V1DEOCOM
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) Pérdidas por Absorción Las pér
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Red en Estrella. Las redes en estre
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La decisión con respecto al númer
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C. Determinación del Promedio de P
Page 95 and 96: La atenuación máxima normalizada
Page 97 and 98: utilizará enlace aéreo a través
Page 99 and 100: Manhote Hardware 1 Cajetín de empa
Page 101 and 102: En el presente diseño se plantea t
Page 103 and 104: 4.3.1.5 COSTOS TOTALES DE OPERACIÓ
Page 105 and 106: Las normas de codificación de imá
Page 107 and 108: 6 Piso SIMBOLOGIA EH3 = Hub = Eieme
Page 109 and 110: Calle Japón MAPA DE UBICACIÓN 0 9
Page 111 and 112: FOREWORD e ITU Telecommunication St
Page 113 and 114: INTRODÜCTION e purpose of this Rec
Page 115 and 116: Bit number 1 2 3 * 5 6 7 8 (SC) S u
Page 117 and 118: e FAW consists of "0011011" ¡n bit
Page 119 and 120: ime alignment is defined to have be
Page 121 and 122: le decoded BAS valué is valíd if:
Page 123 and 124: ec. G.711 50 1 : 57 : 106 113 120 5
Page 125 and 126: B!t1 M \ A2 3 A3 TS1 Inltial channe
Page 127 and 128: [0] [1] [2] [3] [4] [5] [6] [7] [8]
Page 129 and 130: ;utral j-off, U a-off, F -law, OU
Page 131 and 132: id-Ioop Video loop request (see Rec
Page 133 and 134: '29.97 '29.97 id-imp(R) ideo-ISO V-
Page 135 and 136: [0] [1] [2] [3] [4] [5] [6] m [8] [
Page 137 and 138: irsor data on in LSD Cursor data sw
Page 139 and 140: INTERNATIONAL TELECOMMUNICATION UNI
Page 141 and 142: Recommendation H.230 1 Introduction
Page 143 and 144: 3.4 C&I related to simple multipoin
Page 145: TABLE 1/H.230 Code First 3 bits (00
Page 149 and 150: ¿Vnnex A — Identification of the
Page 151 and 152: 'he total capability of a terminal
Page 153 and 154: ourBAS attríbutes are commands: th
Page 155 and 156: ame reínstatement sequence C ¡tho
Page 157 and 158: 4WOA TX m mode OF, BAS-cap.cycle FA
Page 159 and 160: TERMINAL X Incommg signal ramed Out
Page 161 and 162: ) Additional channels idle — This
Page 163 and 164: iv) wait for confirmation that the
Page 165 and 166: ) Procedurefor activation and de-ac
Page 167 and 168: Rec. V.35 VT DSU VT 0 sil E g DDS o
Page 169 and 170: Note that the valué (111) [24] is
Page 171 and 172: To ensure that the picture builds u
Page 173 and 174: Appendix I Initialization: Case of
Page 175 and 176: TERMINAL-X- Start communication TER
Page 177 and 178: TERMINAL "X- Swltch to mode OF L Se
Page 179 and 180: Appendix IV Examples of symmetrical
Page 181 and 182: Appendix VI Hierarchical capability
Page 183 and 184: or! Error! ot a valid leñame. INTE
Page 185 and 186: iecommendation H.261 'onsideríng e
Page 187 and 188: ,4 Source codirig olgorithm . . ,,
Page 189 and 190: 3.2.2 Motion compensation FIGURE 3/
Page 191 and 192: 3.2.6 Clipping of reconstructed pic
Page 193 and 194: 4.2.1 Picture ¡ayer Data for each
Page 195 and 196: 4.2.2.5 Spare Information (GSPARE)
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Intra Intra Prediction ínter ínte
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CBP 60 4 8 16 32 12 48 20 40 28 MVD
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1 3 4 10 11 21 22 36 2 5 9 12 20 23
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Run 2 2 2 2 2 3 3 3 3 4 4 4 5 5 5 6
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FLC 0000 0001 (1) 0000 0010 (2) 000
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5.4.2 Generator polynomial g(x) = (
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ANNEXB (to Recommendation H.261) Hy
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A video sequence lasting more than
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FOREWORD be ITU Telecommunication S
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System description 1 ' Block diagra
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,3.2 Terminal types of visual telep
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)IIowing the conneclion esiahlishmm
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case the cali is dísconnecied for
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flaco wcu Maintenance Conference Te
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) Loop ai lerminal-nelwork inlerl'a
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MARTIN E. ZULTOSKI, Aplicaciones de
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