Robust decoding of variable-length encoded Markov sources using a three-dimensional trellis
2003 (English)In: IEEE Communications Letters, ISSN 1089-7798, Vol. 7, no 7, 320-322 p.Article in journal (Refereed) Published
In this letter, we present an improved index-based a-posteriori probability (APP) decoding approach for the error-resilient transmission of packetized variable-length encoded Markov sources. The proposed algorithm is based on a novel two-dimensional (2-D) state representation which leads to a three-dimensional trellis with unique state transitions. APP decoding on this trellis is realized by employing a 2-D version of the BCJR algorithm where all available source statistics can be fully exploited in the source decoder. For an additional use of channel codes the proposed approach leads to an increased error-correction performance compared to a one-dimensional state representation.
Place, publisher, year, edition, pages
2003. Vol. 7, no 7, 320-322 p.
iterative decoding, joint source-channel coding, residual source redundancy, variable-length codes (VLCs), codes
Engineering and Technology Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-22684ISI: 000184255200010OAI: oai:DiVA.org:kth-22684DiVA: diva2:341382
QC 20100525 NR 201408042010-08-102010-08-102012-01-29Bibliographically approved