multimedia conference services

Multimedia Conference Services

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Multimedia Conference Services The multimedia conference services provide real-time transmission of voice together with motion video and/or various types of multimedia information between groups of users in two or more locations. The documents exchanged may contain all information types. When moving pictures are present, their quality must be at least sufficient for the adequate representation […]

Jitter Components

Jitter Components

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Jitter Components The recent improvement to semiconductor device performance has seen bit rates of 28 Gbps become commonplace.  When using high-speed signals like the  28 Gbps band, the impact of jitter components from various sources in the surrounding environment on the transmission quality cannot be ignored. As a result, accurate evaluation of device characteristics requires testing by injecting multiple types of jitter on the […]

Video telephony services

Video telephony services – General

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Video telephony services – General This is a brief introduction of the general features and attributes of the video telephony services regardless of the network environment where the service might be provided. The video telephony services are classified in the following two main categories: Video telephony service for narrow-band networks; Video telephony service for broadband […]

audiovisual services

Audiovisual Services – Framework

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Audiovisual Services – Framework A number of services are or will be, defined in CCITT having as their common characteristic the transmission of speech together with other information reaching the eventual user in visual form. This Recommendation H.200 concerns a set of such services which should be treated in a harmonized way; it is convenient to refer to […]

visual telephone system

Visual telephone systems and terminal equipment

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Visual telephone systems and terminal equipment  This is a brief introduction of H.320 and this Recommendation H.320 covers the technical requirements for narrow-band visual telephone systems services defined in H.200/F.720-series Recommendations, where channel rates do not exceed 1920 kbit/s. NOTE – It is anticipated that this Recommendation H.320 will be extended to a number of […]

broadband audiovisual communication system

Broadband Audiovisual Communication – Systems and Terminals

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BROADBAND AUDIOVISUAL COMMUNICATION –  SYSTEMS AND TERMINALS  This Recommendation H.310 covers the technical requirements for the systems and terminals of broadband audiovisual communication services defined in H.200/AV.100-series Recommendations. This H.310 defines both unidirectional and bidirectional broadband audiovisual terminals. The classification of H.310 terminals into different terminal types is based on audiovisual and ATM adaptation layer capabilities […]