Abstract:
A method of indicating data quality provided to a digital data receiver. The digital data receiver is typically a broadcast data receiver or set top box receiving digital data from a remote location. The method employs a Forward Error Correction (FEC) method of turbo decoding of the received data, with received data being decoded and errors detected using one or more turbo code decoding stages. The method includes the steps of monitoring and/or measuring error output produced from each of the turbo code decoding stages to obtain an error value at each stage. The error value from each stage is used to calculate a bit error rate (BER) which in turn is used to indicate signal quality using BDR vs Eb/No relationship.
Abstract:
Electrical apparatus, such as a printed circuit board for a broadcast data receiver, is provided. The apparatus includes a number of components (4; 12) which are required to be interconnected in a manner to allow the transmission of data therebetween. At least two of these components (4; 12) are provided with communication means to allow communication of data and the communication means are in the form of a light emitter and receiver.