| CPC G06V 10/806 (2022.01) [G06V 10/225 (2022.01); G06V 10/40 (2022.01); G06V 30/1448 (2022.01); G10L 15/26 (2013.01)] | 20 Claims |

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1. A method of extracting a feature for multimedia data that comprises a plurality of medium types, comprising: determining a first feature for a first medium type in the plurality of medium types by masking a portion in a first medium object with the first medium type in a plurality of rounds; determining a second feature for a second medium type, other than the first medium type, in the plurality of medium types; and generating the feature for the multimedia data based on the first and second features.
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