| 摘要 |
A method of identifying a mechanically readable medium is described. The medium, for instance a gramophone record, a magnetic tape or a celluloid film, contains information which is contained in a continuous sequence on the medium and is intended for optical or acoustic reproduction. A sequence of markings which individualizes the medium, and which can be read out together with the acoustic or optical information, is formed in the area of this acoustic or optical information.
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