GB/T 21642.3-2012Technical requirements for IP video conference system devices - Part 3: multipoint control unit (English PDF)

Foreword

GB/T 21642 "IP-based video conferencing system equipment technical requirements" is divided into four sections.

--- Part 1. Multipoint Controller (MC);

--- Part 2. Multi-Processor (MP);

--- Part 3. Multipoint Control Unit (MCU);

--- Part 4. Gatekeeper (GK).

This is Part 3 GB/T 21642 of.

This section drafted in accordance with GB/T 1.1-2009 given rules.

1 Scope

This section GB/T 21642 specifies the IP network-based video conferencing systems in multi-point control capabilities, freestanding multipoint The control unit (MCU) technical requirements, including video conferencing MCU position in the system, functional requirements, to participate in the process of communication, Messages of support, and IP network interface requirements between the other devices associated with the system interface requirements between logic and performance, the environment, etc. Claim. This section applies to IP-based video conferencing systems MCU.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) used in the present document.

Video encoding GB/T 18119-2000 low bit rate communication

YD/T 822-1996 P x 64kbit/s videoconferencing coding (ITU-TH 261.1993, neq)

YD/T 968-2010 telecommunications terminal equipment and electromagnetic compatibility requirements for measuring methods

YD/T 993-2006 telecommunications terminal equipment mine technical requirements and test methods

YD/T 1046-2000 IP Telephony Gateway Interworking Specification

ITU-TG 711 voice frequency pulse code modulation (Pulsecodemodulation (PCM) ofvoicefrequencies)

ITU-TG 722 7kHz of 64kbit/s audio encoding (7kHzaudio-codingwithin64kbit/s)

Dual rate speech coder ITU-TG 723.1 to 5.3kbit/s and 6.3kbit/s rate for the multimedia communication (Dualrate speechcoderformultimediacommunicationstransmittingat5.3and6.3kbit/s)

ITU-TG 728 excited linear prediction using low delay code on 16kbit/s rate speech coding (Codingofspeech at16kbit/susinglow-delaycodeexcitedlinearprediction)

ITU-TG 729 using Conjugate-Structure Algebraic Code Excited Linear Prediction (CS-CELP) of 8kbit/s speech coding (Codingof speechat8kbit/susingconjugate-structurealgebraic-code-excitedlinearprediction (CS-ACELP)

ITU-TH 225.0 packet-based multimedia communications systems packet call signaling protocols and media stream (Mediastream packetizationandsynchronizationonnon-guaranteedqualityofserviceLANs)

ITU-TH 230 audiovisual system frame synchronization control signal and the indication signal (Frame-synchronouscontroland indicationsignalsforaudiovisualsystems)

Security and Encryption ITU-TH 235 H-series multimedia terminals (SecurityandencryptionforH-Series (H.323 andotherH.245-based) multimediaterminals)

ITU-TH 243 the highest rate of 1920kbit/s digital channels three or more parties video/audio communication terminal established regulations Cheng (Proceduresforestablishingcommunicationbetweenthreeormoreaudiovisualterminalsusing digitalchannelsupto1920kbit/s)

ITU-TH 245 Control Protocol (Controlprotocolformultimediacommunication) multimedia communication