Patent · US Active

Local metadata embedding and decoding

US7542976B2 · kind B2 · utility

6Cited by

10References

20Claims

0Family size

Assignee

Microsoft Corporation · US

Inventors

Jian Wang · Beijing, CN
Zhouchen Lin · Beijing, CN
Yue Li · Beijing, CN
Chunhui Zhang · Bissenkamp, SE
Yingnong Dang · Beijing, CN
Jiang Wu · San Jose, US
Qiang Wang · Beijing, CN

Key dates

Filing date	Apr 22, 2005
Grant date	Jun 2, 2009
Priority date	—
Expiry date	Aug 16, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG06F3/03545
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

In accordance with embodiments of the invention, local metadata is embedded into an embedded interactive code document by combining a first m-array and a second m-array to generate a combined m-array with encoded local metadata such that a start position of the second m-array in the combined m-array is shifted, by an amount that is based on the local metadata, relative to a start position of the first m-array in the combined m-array. The first m-array and the second m-array may contain the same repeating bit sequence. Local metadata may be decoded from the embedded interactive code document by decoding the local metadata from the combined m-array by determining the amount by which the second m-array is shifted, relative to the first m-array, in the combined m-array.

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