Embedded Coding Technique using Generalised Array Codes, Statistical Channel Evaluation and Nested Trellis Decoding

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Generally embedded coding techniques based on row and column array codes employ a combination of inner codes for error correction and outer codes for error detection. The outer codes involve the addition of further redundant bits. This reduces the overall code rate and hence the throughput of the system. Furthermore the decoding of these array codes is not maximum likelihood decoding. In this paper we propose a new embedded coding technique that employs generalised array codes but no outer codes. The decoding of these codes is maximum likelihood and is done in a nested fashion using a single trellis and the error detection is done by statistical channel evaluation technique that uses the trellis of the component codes embedded in the main block.