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Record W2121051850 · doi:10.1109/glocom.1999.831741

Symbol-MAP-based trellis vector quantization

2003· article· en· W2121051850 on OpenAlex
Tariq Haddad, Abbas Yongaçoğlu

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

Venuenot available
Typearticle
Languageen
FieldComputer Science
TopicAdvanced Data Compression Techniques
Canadian institutionsUniversity of Ottawa
Fundersnot available
KeywordsViterbi algorithmAlgorithmDecoding methodsSequential decodingIterative Viterbi decodingSoft output Viterbi algorithmComputer scienceTrellis quantizationVector quantizationEncoderTrellis (graph)Convolutional codeViterbi decoderList decodingSoft-decision decoderConcatenated error correction codeArtificial intelligenceImage compressionBlock code

Abstract

fetched live from OpenAlex

We exploit the similarity between source compression and channel decoding to develop a new encoding algorithm for trellis vector quantization (TVQ). We start by drawing the analogy between TVQ and the process of sequence-ML channel decoding. Then, the new search algorithm is derived based on the symbol-MAP decoding algorithm, which is used in soft-output channel decoding applications. Given a block of source output vectors, the new algorithm delivers a set of probabilities that describe the reliability of the different symbols at the encoder output for each time instant, in the minimum distortion sense. The performance of both the new algorithm and the Viterbi algorithm is compared using memoryless Gaussian and Gauss-Markov sources. The two algorithms provide expected similar distortion-rate results. This behavior is due to the fact that sequence-ML decoding is equivalent to symbol-MAP decoding of independent and identically distributed data symbols. Although the new algorithm is approximately 4 times more complex than the Viterbi (1974) algorithm, it provides distortion-dependent reliability information that can be used to improve the quality of compression.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Theoretical or conceptual · Consensus signal: none
GenreCandidate signal: Methods · Consensus signal: Methods
Teacher disagreement score0.944
Threshold uncertainty score0.352

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.001
Open science0.0010.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.015
GPT teacher head0.263
Teacher spread0.248 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Quick stats

Citations5
Published2003
Admission routes1
Has abstractyes

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