An apparatus for substituting a higher quality audio soundtrack for a lesser quality audio soundtrack during reproduction of the lesser quality audio soundtrack and a corresponding visual picture

Department Ministry of Commerce & Industry
Branch PATENT
From Year / Date
(YYYY-MM-DD)
1987
To Year / Date
(YYYY-MM-DD)
1987
Identifier PR_000005017217
File No. 954/Del/1987
Location Repository III
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