Patent ID: 6097760
Filing Date: 2000-08-01
Classification: H03M

Abstract:
A data communications system for communicating digital data between a digital data source and a digital data sink, said data communications system comprising a standard telecommunications apparatus which includes an encoder which operates in accordance with a data rate adaptation process to generate transport digital signals from pre-transport digital signals representative of analogue signals, a data transmissions system for communicating said transport signals, and a decoder which operates in accordance with said data rate adaptation process to substantially re-generate the pre-transport signals from said transport signals communicated by said data transmission system, characterised in thatsaid data communication system further comprises a mapping data processor coupled to said data source and to said encoder which mapping data processor operates to generate coded symbols representative of the data from said data source in accordance with a predetermined mapping function, said coded symbols conforming to said pre-transport signals and an unmapping data processor connected to said decoder and to said data sink which unmapping data processor operates to substantially re-generate the data from communicated transport signals in accordance with said mapping function, wherein each of said coded symbols represents at least one digit of the data from said data source and said coded symbols are arranged in combination with said data rate adaptation process to substantially increase a rate of data communication over that achieved with the standard telecommunication system alone.