How closed captions work

  • Alison Malcom
  • Published 1985 in IEEE Transactions on Professional Communication


The author describes the coding of closed captions for the hearing impaired, which are included in standard television broadcast signals on line 21 of the standard television broadcast signal. Decoders in adaptors or in special television receivers decode these signals and display the captions on television screens. 

3 Figures and Tables

Cite this paper

@article{Malcom1985HowCC, title={How closed captions work}, author={Alison Malcom}, journal={IEEE Transactions on Professional Communication}, year={1985}, volume={PC-28}, pages={19-20} }