The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 1986
Filed:
Feb. 23, 1982
Kokusai Denshin Denwa Kabushiki Kaisha, Tokyo, JP;
Abstract
A TV signal median prediction coding system in which a prediction value of a picture element to be coded is obtained from information of an already coded picture element and a difference between the prediction value and the value of the picture element to be coded is coded. In accordance with the present invention there is provided a storage section having a capacity large enough to store input TV signals of at least one frame at all times; an intrafield prediction section which, when supplied with a value X.sub.1 of the latest input picture element of the TV signal, produces a prediction value X.sub.1N of the latest input picture element using a value of a picture element of the same field as the latest input picture element, read out from the storage section; an interfield prediction section which, when supplied with the value X.sub.1 of the latest input picture element, produces a prediction value X.sub.1K of the latest input picture element using picture elements of the same field as the latest input picture element and the immediately preceding field, read out from the storage section; an interframe prediction section which, when supplied with the value X.sub.1 of the latest input picture element, produces a prediction value X.sub.1F of the latest input picture element using picture elements of the same field as the latest input picture element, the immediately preceding frame; and an adaptive control section which compares the intrafield prediction value X.sub.1N, the interfield prediction value X.sub.1K and the interframe prediction value X.sub.1F in magnitude and selects a median of them as the latest input picture element value X.sub.1.