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ATOM MODULUS QUANTIZATION FOR MATCHING PURSUIT VIDEO CODING
| Content Provider | CiteSeerX |
|---|---|
| Author | Vleeschouwer, Christophe De |
| Abstract | We provide an analytical study of the selection and modulus quantization of matching pursuits (MP) coefficients. We demonstrate that an optimal rate-distortion trade-off is achieved by selecting the atoms up to a dead-zone threshold, and by defining the modulus quantizer in terms of that threshold. In doing so, we take into account quantization error re-injection resulting from inserting the modulus quantizer inside the MP atom computation loop. In-loop quantization affects the stepsize of the uniform quantizer, and results in a non-uniform optimal entropy constrained quantizer. Improvements larger than one dB are obtained for video coding. 1. |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Modulus Quantizer Uniform Quantizer Analytical Study Optimal Rate-distortion Trade-off Modulus Quantization Account Quantization Error Re-injection Dead-zone Threshold In-loop Quantization Non-uniform Optimal Entropy Mp Atom Computation Loop Video Coding |
| Content Type | Text |
