FIELD: information technology.
SUBSTANCE: invention relates to metadata processing and is intended for metadata conversion with reduced computational complexity. For this purpose, a code converter can convert the inlet bit stream, containing a content inlet frame and associated metadata inlet frame in the outlet bit stream, containing the content outlet frame and associated metadata outlet frame. Code converter comprises a decoder to convert an inlet frame of the content in a set of decoded discrete values of the PCM signal, extraction of metadata from the metadata inlet frame, generation of signature value for the set of decoded discrete values of the PCM and the extracted metadata using cryptographic decoder key, encoder, made to receive the set of discrete values of the PCM and associated metadata, receiving the signature value, checking the received signature value for validity by means of cryptographic coder key, generation of content outlet frame and generation of associated metadata outlet frame of the outlet bit stream.
EFFECT: technical result is high accuracy of metadata conversion.
25 cl, 13 dwg, 5 tbl
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