J
J.D. Villasenor
Researcher at University of California, Los Angeles
Publications - 60
Citations - 2329
J.D. Villasenor is an academic researcher from University of California, Los Angeles. The author has contributed to research in topics: Decoding methods & Turbo code. The author has an hindex of 25, co-authored 60 publications receiving 2254 citations.
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Selective avoidance of cycles in irregular LDPC code construction
TL;DR: A Viterbi-like algorithm is proposed that selectively avoids small cycle clusters that are isolated from the rest of the graph and yields codes with error floors that are orders of magnitude below those of random codes with very small degradation in capacity-approaching capability.
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Stack-run image coding
TL;DR: A new image coding approach in which a 4-ary arithmetic coder is used to represent significant coefficient values and the lengths of zero runs between coefficients, which involves much lower addressing complexity than other algorithms such as zerotree coding.
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Secure Arithmetic Coding
TL;DR: The system utilizes an arithmetic coder in which the overall length within the range [0,1) allocated to each symbol is preserved, but the traditional assumption that a single contiguous interval is used for each symbols is removed.
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Binary arithmetic coding with key-based interval splitting
TL;DR: This work describes a modification of this approach in which the overall length within the range [0,1) allocated to each symbol is preserved, but the traditional assumption that a single contiguous interval is used for each symbols is removed.
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Joint turbo decoding and estimation of hidden Markov sources
TL;DR: The proposed joint source-channel decoding technique leads to significantly improved performance relative to systems in which source statistics are not exploited and avoids the need to perform any explicit source coding prior to transmission.