Asymmetric/unidirectional error correcting and detecting codes

Introduces the theory and design of codes that correct t asymmetric errors and simultaneously detect d(d>t) asymmetric errors (t-AEC/d-AED). These codes have a much higher information rate than symmetric error correcting/detecting codes and yet maintain the same encoding and decoding complexity as existing error correcting codes. They are suited for asymmetric channels such as digital transmission over optical fiber or metallic cable and recording of data on optical disks. The authors also improve the design of the best-known t-EC/AUED (t symmetric error correcting and all unidirectional error detecting) codes and t-EC/d-UED (t symmetric error correcting and d unidirectional error detecting) codes