Picture enhancing circuit

Details Picture enhancing circuit Picture enhancing circuit

1993-02-10

1994-12-20

Hajec, Donald

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

360 32, 360 48, G11B 509, G11B 500

Patent

active

053750195

ABSTRACT:
A picture enhancing circuit for a reproduced picture signal includes a field memory and a circuit for writing data into the memory, in which the reproduced picture signal is in the form of sync blocks made up of sync data and picture data. After sync detection is performed, the content of the sync data is reset to zero and written into the memory along with the picture data, and each time the sync data and picture data are read out from the field memory the content of the sync data is updated. The contents of the sync data indicate the number of times that the picture data has been read out from the memory and, thus, its age. This age is used to determine whether the picture data can be used or whether it should be interpolated before use.

REFERENCES:
patent: 4758902 (1988-07-01), Okamoto et al.
patent: 4791499 (1988-12-01), Mester
patent: 4799113 (1989-01-01), Murakami
patent: 4837767 (1989-06-01), Hartwell et al.
patent: 4858035 (1988-08-01), Hakawa
patent: 4862295 (1989-08-01), Tanaka et al.
patent: 5187615 (1993-02-01), Miyazaubi et al.

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