Introduction
The rapid expansion of the Internet in the past years has rapidly increased the
availability of digital data such as audio, images and videos to the public. As we have
witnessed in the past few months, the problem of protecting multimedia information
becomes more and more important and a lot of copyright owners are concerned about
protecting any illegal duplication of their data or work. Some serious work needs to
be done in order to maintain the availability of multimedia information but, in the
meantime, the indust ....etc

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hi,I need audio watermark matlab code ,is there any one help me,plz?
lots of thanks
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SPHERICAL
TRIGONOMETRY

BY
I. TODHUNTER, M.A., F.R.S.,
HONORARY FELLOW OF ST JOHN’S COLLEGE,
CAMBRIDGE.
FIFTH EDITION.
London :
MACMILLAN AND CO.
1886



CONTENTS.

I Great and Small Circles. 1
II Spherical Triangles. 7
III Spherical Geometry. 11
IV Relations between the Trigonometrical Functions of the Sides
and the Angles of a Spherical Triangle. 17
V Solution of Right-angled Triangles. 35
VI Solution of Oblique-Angled Triangles. 49
VII Circumscribed and Inscribe ....etc

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Abstract


With the increase in the availability of digital data such as multimedia services on the Internet, there is a pressing need to manage and protect the illegal duplications a, solution to this problem, a digital watermark technology is now drawing the attentions a new method of protecting copyrights for digital data. In this paper, we present two methods of digital watermark for image signals based on the wavelet transform. We classify wavelet coefficients as insignificant or significant by using zero tree which is defined in the e ....etc

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so please send me
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its good
Applications  Ambiguous Case 
Area of a Triangle
Until now, our work with triangles has been limited to right triangles. However,
the concepts developed in Chapter 5 can be extended to all triangles. Every triangle
has three sides and three angles. If any three of the six measures of a
triangle are known (provided at least one measure is the length of a side), then
the other three measures can be found. This is called solving the triangle
Applications  Ambiguous Case 
Area of a Triangle
Until now, our work with triangles ....etc

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