ITU-R REPORT BT.956-2 PDF

Introduction

Data broadcasting systems utilizing television networks are already implemented in different countries for providing a multitude of services. The quality of these services depends on:

— the characteristics of the data transmission channel;

— the effect of these characteristics on the intended services.

To provide a suitable service, measurements on data transmission channels are necessary and appropriate methods have to be devised.

Part I of this Report deals with the measurement of the quality of broadcast digital data channels, Part II discusses the effects of the transmission channel on the service quality in the case of teletext*.

* The terms "teletext" and "broadcast videography" are, at present, used interchangeably (see Appendix" to Recommendation 662).