Importance

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Abstract

A method and arrangement for connection setup and control of digitally compressed audio, video and data signals between videotelephones of the analog and digital communication networks (for example, telephone network, mobile telecommunication) and a method and arrangement for the transmission of still pictures and/or between videotelephones of the same category are disclosed. In videotelephony, a bidirectional full-duplex information exchange is fundamentally assumed in both directions, that is, both communicating videotelephone terminal equipment are usually transmitter and receiver of audio, video, control and, potentially, other information types at the same time. The method for connection setup between videotelephone communication terminal equipment in a transmission network using a protected transmission protocol in a framework of ITU-T V.8 initialization and of an ITU-T V.34 modem, has the steps of: supporting videotelephone communication within the framework of the ITU-T V.8 initialization in that at least a request for high transmission quality for videotelephone communication is signaled to the network during connection setup between a calling terminal equipment and a called terminal equipment; and recognizing in the calling terminal equipment a type of the called terminal equipment and a type of the transmission network connected thereto.

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First Claim