Widi Astuti

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Watermarking scheme can be a solution to embed more than one type of watermark that has a different purpose. Signature watermark can be used to embed some ownership information that is resistant to attack (authenticity control). Meanwhile, reference watermark can be used to detect modifications on digital medical images (integrity control). In this paper,(More)
Speech recognition is widely applied to speech to text, speech to emotion, in order to make gadget and computer easier to use, or to help people with hearing disability. Feature extraction is one of significant step in the performance of speech recognition. Therefore, the proper selection is really needed. In this paper, we analyze feature extraction that(More)
Currently, the data storage medium in digital form are widely applied in various fields, including in the medical world. The excessive size of the digital medical image digital poses problems in terms of storage and the time to transmit these images through the Internet. To overcome these problems, a digital image compression can be conducted. This(More)
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