Two-Way Source Coding With a Helper

Consider the two-way rate-distortion problem in which a helper sends a common limited-rate message to both users based on side information at its disposal. We characterize the region of achievable rates and distortions when the Markov relation (Helper)-(User 1)-(User 2) holds. The main insight of th...

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Vydáno v:IEEE transactions on information theory Ročník 56; číslo 6; s. 2905 - 2919
Hlavní autoři: Permuter, Haim H, Steinberg, Yossef, Weissman, Tsachy
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York IEEE 01.06.2010
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Decoders
Decoding
Distortion
Encoders
Encoding
Error analysis
Gaussian
Information processing
Information systems
Information theory
Markov analysis
Markov processes
Messages
Normal distribution
Optimization
Peer to peer computing
Protocols
Rate-distortion
Source coding
Theory
two-way rate distortion
undirected graphs
verification of Markov relations
Wyner-Ziv source coding
ISSN:0018-9448, 1557-9654
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Abstract Consider the two-way rate-distortion problem in which a helper sends a common limited-rate message to both users based on side information at its disposal. We characterize the region of achievable rates and distortions when the Markov relation (Helper)-(User 1)-(User 2) holds. The main insight of the result is that in order to achieve the optimal rate, the helper may use a binning scheme, as in Wyner-Ziv, where the side information at the decoder is the ¿further¿ user, namely, User 2. We derive these regions explicitly for the Gaussian sources with square error distortion, analyze a tradeoff between the rate from the helper and the rate from the source, and examine a special case where the helper has the freedom to send different messages, at different rates, to the encoder and the decoder. The converse proofs use a technique for verifying Markov relations via undirected graphs.
AbstractList Consider the two-way rate-distortion problem in which a helper sends a common limited-rate message to both users based on side information at its disposal. We characterize the region of achievable rates and distortions when the Markov relation (Helper)-(User 1)-(User 2) holds. The main insight of the result is that in order to achieve the optimal rate, the helper may use a binning scheme, as in Wyner-Ziv, where the side information at the decoder is the 'further' user, namely, User 2. We derive these regions explicitly for the Gaussian sources with square error distortion, analyze a tradeoff between the rate from the helper and the rate from the source, and examine a special case where the helper has the freedom to send different messages, at different rates, to the encoder and the decoder. The converse proofs use a technique for verifying Markov relations via undirected graphs.
Consider the two-way rate-distortion problem in which a helper sends a common limited-rate message to both users based on side information at its disposal. We characterize the region of achievable rates and distortions when the Markov relation (Helper)-(User 1)-(User 2) holds. The main insight of the result is that in order to achieve the optimal rate, the helper may use a binning scheme, as in Wyner-Ziv, where the side information at the decoder is the ...further... user, namely, User 2. We derive these regions explicitly for the Gaussian sources with square error distortion, analyze a tradeoff between the rate from the helper and the rate from the source, and examine a special case where the helper has the freedom to send different messages, at different rates, to the encoder and the decoder. The converse proofs use a technique for verifying Markov relations via undirected graphs. (ProQuest: ... denotes formulae/symbols omitted.)
Consider the two-way rate-distortion problem in which a helper sends a common limited-rate message to both users based on side information at its disposal. We characterize the region of achievable rates and distortions when the Markov relation (Helper)-(User 1)-(User 2) holds. The main insight of the result is that in order to achieve the optimal rate, the helper may use a binning scheme, as in Wyner-Ziv, where the side information at the decoder is the ¿further¿ user, namely, User 2. We derive these regions explicitly for the Gaussian sources with square error distortion, analyze a tradeoff between the rate from the helper and the rate from the source, and examine a special case where the helper has the freedom to send different messages, at different rates, to the encoder and the decoder. The converse proofs use a technique for verifying Markov relations via undirected graphs.
Author Weissman, Tsachy
Permuter, Haim H
Steinberg, Yossef
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Snippet Consider the two-way rate-distortion problem in which a helper sends a common limited-rate message to both users based on side information at its disposal. We...
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SubjectTerms Decoders
Decoding
Distortion
Encoders
Encoding
Error analysis
Gaussian
Information processing
Information systems
Information theory
Markov analysis
Markov processes
Messages
Normal distribution
Optimization
Peer to peer computing
Protocols
Rate-distortion
Source coding
Theory
two-way rate distortion
undirected graphs
verification of Markov relations
Wyner-Ziv source coding
Title Two-Way Source Coding With a Helper
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