Abstract
High quality of the stego media is an important issue to evaluate the stego system, the stego media must be closed to the covering one and the MSE measured between them must be low as possible, while the PSNR measured between them must be high as possible. In this paper research a detailed analysis of stego media will be produced, the quality of digital color image will be compared with the quality of digital speech file. Digital color image will be used to hold various messages, the same messages will be hidden in a digital speech file, and the quality parameters will be calculated. The results of using the image will be compared with the results of using digital speech file to raise some recommendation. 2 and 4 bits for message hiding will be tested using short, medium and long messages.
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