Inventor
Xiancheng Yuan
Inventor
Bedford, MA, US
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Nprimary
H04NPictorial communication, e.g. television67%
G06TImage data processing or generation, in general33%
PatentTitleYear
5,821,986'Method and apparatus for visual communications in a scalable network environment'19985,367,385'Method and apparatus for processing block coded image data to reduce boundary artifacts between adjacent image blocks'19945,155,594'Hierarchical encoding method and apparatus employing background references for efficiently communicating image sequences'19925,150,209'Hierarchical entropy coded lattice threshold quantization encoding method and apparatus for image and video compression'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–1998Patents assigned to PICTURETEL CORP (4)· patent assignee history
1992–1998Based in Bedford, MA, US· patent location history
1994Based in Boston, MA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| PICTURETEL CORP | 4 | 1992–1998 |
Locations
| Location | Patents | Span |
|---|---|---|
| Bedford, Massachusetts, US | 3 | 1992–1998 |
| Boston, Massachusetts, US | 1 | 1994 |