Development and Performance of the PBS VBI Data Delivery System
This article discusses the PBS VBI data delivery system, a point-to-multipoint data link using the vertical blanking interval {VBI) of the public television signal. Development of the system for PBS Enterprises, a subsidiary of PBS, has taken place over the past several years, with emphasis on quality performance. Since broadcast television has traditionally been a harsh environment for VBI data systems, PBS has developed and implemented its own unique error-correction techniques. The methodology used to determine the error-correction parameters is discussed. Major components of the system, including the data inserter at the PBS uplink, the data bridge at a typical PBS member station, and the VBI Data Receiver (VDRTM) at the end user's site, are described. A summary of the system performance is also presented.
- Print ISSN
- 0036-1682
- Published
- 1988-06
- Content type
- Original Research
- DOI
- 10.5594/J02944