Multi-loop testing apparatus with means for adjusting a reproduced video signal

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 detect...

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Bibliographic Details
Main Author ISHII; MIKIO
Format Patent
LanguageEnglish
Published 17.09.1996
Edition6
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary: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.
Bibliography:Application Number: US19940185754