Entropy constrained scalar quantizer for a Laplace-Markov source
US7145948B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2002 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Apr 12, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/619
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video coding system and method for coding an input frame in which the evolution of discrete cosine transform (DCT) coefficients is modeled as a Laplace-Markov process, the system comprising: a base layer processing system for generating a base layer reconstruction; an enhancement layer processing system for generating an enhancement layer reconstruction; and an entropy constrained scalar quantizer (ECSQ) system for descritizing a prediction residual between the input frame and an estimation theoretic (ET) prediction output; wherein the ECSQ system utilizes an ECSQ that comprises a uniform threshold quantizer with a deadzone size defined by the equation:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.