Patent · US Expired

Device for following and estimating the local state of picture contours

US4363103A · kind A · utility

5Cited by

7References

13Claims

0Family size

Assignees

L'Etat Francais represente par le Secretaire d'Etat aux Postes et Telecommunications et a la Telediffusion (Centre National d'Etudes des Telecommunications) · FR
Etablissement Public de Diffusion dit: Telediffusion de France · FR

Inventors

Christian Richard · Clamecy, FR
Francis Kretz · Olivet, FR
Albert Benveniste · Rennes, FR

Key dates

Filing date	Jun 11, 1980
Grant date	Dec 7, 1982
Priority date	—
Expiry date	Jun 11, 2000

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/50
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A device for following and recursively estimating the local state of pict contours defined by lines of N points distributed in accordance with an orthogonal sampling structure, said points being defined by successive numerical samples. The invention also relates to a differential coded pulse modulation coder and a differential coded pulse modulation decoder.

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