Analysis and implementation of error correcting double bundle Reed Solomon codes for UK teletext

The introduction of double-bundle Reed-Solomon (RS) error correcting codes in UK teletext is proposed. In order to implement this, one or two rows of parity-check bytes must be added. Single-bundle and double-bundle codes are defined. The performance of the UK teletext system is evaluated, when rows of parity-check bytes in the bundles are used and the computer simulations are described. A software written coder and decoder are described which have been tested in a laboratory environment. Results obtained from simulations and implementations are in good agreement with analytical results. The performance of the teletext system is found to be enhanced by the introduction of the RS codes