Video image transmission via mobile satellite channels
Bibliographic record
Abstract
This paper deals with transmitting CCITT H.261 standard compressed moving-images (64 kbits/sec) through shadowed mobile satellite channels. Concatenated codes consisting of 8PSK trellis inner codes and Reed-Solomon (or BCH) outer codes are used to achieve large coding gains with small bandwidth expansion in the presence of frequency-nonselective slow fading. Pilot symbol-aided techniques have been found to be suitable for the transmission of digital signals over mobile satellite channels. An improved pilot symbol assisted DFALP (decision feedback adaptive linear prediction) algorithm is presented and used to estimate fading channel state information. Monte Carlo simulations show that our 40.5 kBd system yields near error free image transmission at average channel signal to noise ratio (Eb/No) between 10-13 dB over light-to-average shadowed Rician channels. The trade off between BER performance and delay due to interleaving is investigated.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot 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.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".