Turbo-coded transmission of smoothed H.263 video for the cdma2000 downlink
Why this work is in the frame
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Bibliographic record
Abstract
H.263 video bitstreams can be characterized by high peak rates, frequent rate variations, and a high sensitivity to bit errors. Moreover, many interactive/streaming video applications require a tight bound on delay. The paper evaluates the performance of H.263 video transmission on the downlink of a cdma2000 system, and examines some of the tradeoffs needed in the design of such a system in order to meet the above requirements. In order to match the variable source rate to the bandwidth available to mobile cdma2000 video users, real-time smoothing of the video stream is performed prior to transmission. This introduces a delay at the video decoder which varies with the amount of buffering. To reduce the channel bit-error rate (BER), turbo coding is employed, which is also responsible for a delay at the receiver end. Hence, a tradeoff must be achieved between the amount of smoothing and error-correction, in order to respect the total end-to-end delay restrictions. Using entire system simulations, we assess the effects of the parameters of both the smoothing algorithm and the turbo coder on the received picture quality, for a given maximum delay: this work thus presents a joint optimization of real-time smoothing and turbo coding/decoding for H.263 video applications.
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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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it