Question 22/XVIII - Broadband ISDN influence on principles for video
coding

Considering

(a) that a CCITT Recommendation I.121 defines the basic principles for
broadband ISDN and that a status report (annexed to relevant Questions)
has been prepared on broadband aspects of ISDN;

(b) that the characteristics of these broadband ISDN video services may
differ significantly from pure distributive video services;

(c) that CMTT have responsibility for producing Recommendations on video
coding techniques for broadcast applications;

(d) that CCITT have responsibility for producing Recommendations on
video coding techniques for interactive services;

(e) that it may be advantageous to use similar coding techniques for
both interactive and distribution services;

the following should be studied:

1. What new Recommendations are required to establish principles for the
future development of video coding techniques for broadband ISDN video
services applications?

This should include:

1.1 the main characteristics of broadband ISDN which influence the
choice of video coding techniques;

1.2 the capabilities for packetized video over Asynchronous Transfer
Mode (ATM) networks and user-network interfaces.