Presented by
A.Nithya

---

[attachment=11136]
Design of FPGA Text Information Encryption in Multimedia Audio.
- An approach
ABSTRACT:
The Textual information is embedded into an audio using LSB ( Least significant bit) technique and it is encrypted and decrypted by steganography algorithm.
LITERATURE SURVEY:
(1) poulima Dutta, Debnath Battacharya (2009 ieee)
Data Hiding in Audio Signal: A Review
International Journal of Database Theory and Application Vol. 2, No. 2.
Information hiding technique is a new kind of secret communication technology. In this paper the general principles of hiding secret information using audio technology and an overview of functions and techniques were given.
(2) Rangding Wang, Jiaqiang Tan(2008 ieee)
A Novel data hiding algorithm for MP3 audio
In this paper data hiding method for MP3 audio files that operates on compressed bit stream is proposed.
Here Huffman coding is used in count1 region.
(3) Xiaomei Quan ,Hongbin Zhang(2008 ieee)
Data Hiding in MPEG Compressed Audio Using Wet Paper Codes
In this paper data hiding scheme for MPEG compressed audio is proposed.
It uses wet paper codes as a communication channel and hides data in MPEG audio.
(4) Akira Nishimura (2008 ieee)
Data Hiding for Audio Signals that are Robust with respect to Air
Transmission and a Speech Codec.
In this paper data hided in audio signals using AMR (amplitude modulation reverberation).
PESQ and PESA algorithms used here.
Transmit 80% of data at a bit rate of 12.2Kbps.
MERITS AND DEMERITS:
EXISTING SYSTEM:
Common methods used for hiding secret information in audio such as
parity coding – Robustness.
phase coding – low data transmission.
spread spectrum–high computational complexity.
echo hiding – only in musical tone.
PROPOSED SYSTEM:
Least significant bit (LSB) coding is the simplest way to embed information in a digital audio file. Steps involved are:
Receives the audio file in the form of bytes and converted into bit pattern.
Each character in the message is converted into bit pattern.
Replaces the LSB bit from audio with LSB bit from character in the message.
ADVANTAGES:
Large amount of data can be encoded.
Does not change the file size.
Suitable for any type audio file format.
Channel capacity bit rate will be 44Kbps.
APPLICATIONS:
Used in:
 Business world.
 Chemical formulas.
 Plan for new invention
 Military purpose.
 Forensic application.
BLOCK DIAGRAM: