METHOD AND SYSTEM FOR COMMUNICATING MULTIMEDIA USING RECONFIGURABLE RATE-LESS CODE AND DECODING IN-PROCESS STATUS FEEDBACK

摘要

PROBLEM TO BE SOLVED: To provide a method for designing an edge degree distribution of rate-less codes for any arbitrary channel.SOLUTION: Capacity-approaching rate-less codes are used to communicate multimedia data even with very short code-words such as 64 bits or less via erasure and noise channels. Based on an equivalent metric of decoding behavior in any channel, a degree distribution of rate-less codes such as Luby transform codes and Raptor codes is optimized on the basis of in-process status of decoding. A regularized least-squares optimization is used to avoid erroneous decoding. Multiple feedbacks can further improve performance.