Multi-loop testing apparatus with means for adjusting a reproduc

Details Multi-loop testing apparatus with means for adjusting a reproduc Multi-loop testing apparatus with means for adjusting a reproduc

1994-01-24

1996-09-17

Fran, Thai Q.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358320, 358337, 358339, 360 31, H04N 576

Patent

active

055574173

ABSTRACT:
Apparatus for adjusting a digital signal which is subjected to analog processing after being reproduced from a record medium includes a digital test signal source, a loop including DAC and ADC for circulating the digital test signal therethrough a predetermined number of times, a detector for detecting changes in the test signal after having been circulated through the loop, and adjustment means having adjustment values set in response to the detected changes so as to adjust predetermined characteristics of a digital video signal that subsequently may be reproduced from the record medium, thereby minimizing changes and degradations in the reproduced digital video signal that otherwise would be caused by the analog processing.

REFERENCES:
patent: 4325080 (1982-04-01), Satoh
patent: 4998171 (1991-03-01), Kim et al.
patent: 5070495 (1991-12-01), Bletscher, Jr. et al.
patent: 5072435 (1991-12-01), Bakx
patent: 5146210 (1992-09-01), Heberle

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