Patent · US Active

Adaptive deadzone size adjustment in quantization

US8498335B2 · kind B2 · utility

22Cited by

195References

19Claims

0Family size

Assignee

Microsoft Corporation · US

Inventors

Thomas W. Holcomb · Bothell, US
Minghui Xia · Bellevue, US
Chih-Lung Lin · Redmond, US
Cheng Chang · Taichung, TW

Key dates

Filing date	Mar 26, 2007
Grant date	Jul 30, 2013
Priority date	—
Expiry date	Sep 9, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/176
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Techniques and tools are described for adaptive deadzone (“DZ”) resizing during quantization. For example, in some embodiments, for quantization of an AC frequency coefficient of a block, a video encoder adjusts DZ size of a selected quantizer depending on the texture of the block. In other embodiments, a video encoder adjusts DZ size depending on the frequency of a coefficient being quantized. In still other embodiments, for quantization of an AC frequency coefficient of a block, a video encoder adjusts DZ size depending on the texture of the block and the frequency of the coefficient being quantized.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.