It is a great pleasure to be asked to write the Preface for this book on trellis decoding of error correcting block codes. The subject is extremely significant both theoretically and practically, and is very timely because of recent devel- opments in the microelectronic implementation and range of application of error-control coding systems based on block codes. The authors have been notably active in signal processing and coding research and development for several years, and therefore very well placed to contribute to the state of the art on the subject of trellis decoding. In particular, the book represents a unique approach to many practical aspects of the topic. As the authors point out, there are two main classes of error control codes: block codes and convolutinal codes. Block codes came first historically and have a well-developed mathematical structure. Convolutional codes come later, and have developed heuristically, though a more formal treatment has emerged via recent developments in the theory of symbolic dynamics. Max- imum likelihood (ML) decoding of powerful codes in both these classes is computationally complex in the general case; that is, ML decoding fails into the class of NP-hard computational problems. This arieses because the de- coding complexity is an exponential function of key parameters of the code.
Practical and easy to understand, UNDERSTANDING MEDICAL CODING: A COMPREHENSIVE GUIDE, THIRD EDITION teaches readers everything they need to know about medical coding. Through clear, step-by-step instructions, readers will learn how to code a claim correctly, link the correct CPT and ICD-9-CM codes for reimbursement, understand adjustments as well as how and when to bill patients, and determine what to do if there is a denial or rejection. Coverage has been thoroughly updated to include information on ICD-10-CM and how it compares to ICD-9-CM. CPT coding and modifiers are also discussed, as well as more code-specific information, concentrating on specialty coding and the levels of coding.
Website Developers Articles
Website Developers Books