Psychoacoustic Approaches to Audio Steganography
•Download as PPT, PDF•
0 likes•2,192 views
Presentation slides corresponding to a paper that explores methods of audio steganography with emphasis on psychoacoustic approaches. Specifically, it describes a project that had the requirement of hiding a text-based message inside an audio signal with minimal or no distortion of the signal as perceived by the human ear. The theory and experimental results of each approach are discussed.
![Audio Steganography ,[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/eces434finalproject-100916014741-phpapp02/85/Psychoacoustic-Approaches-to-Audio-Steganography-1-320.jpg)
![Introduction ,[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Recommended
Recommended
More Related Content
What's hot
What's hot (20)
Viewers also liked
Viewers also liked (17)
Similar to Psychoacoustic Approaches to Audio Steganography
Similar to Psychoacoustic Approaches to Audio Steganography (20)
More from Cody Ray
More from Cody Ray (8)
Recently uploaded
Recently uploaded (20)
Psychoacoustic Approaches to Audio Steganography
- 6. LSB System Design Copy Header & Data Size Convert Txt->Bin Embed Identifier,Len, Msg Write New Wav File Extract Length of Message Check for Identifier Extract LSB from WavData ConvertBin->Txt Embed Message Recover Message
- 7. Wav File Format Start Byte Len Name 0 12 RIFF Header 12 24 Wav Format Subchunk 36 8 Data Subchunk (ID and Size) 44 * Data
- 9. Mono Wav LSB
- 10. Stereo Wav LSB
- 11. LSB Results Mono Stereo Input Output
- 13. AM System Design Calculate Block Size Convert Txt->Bin Slice Time Blocks Scale Each Slice Slice Time Blocks Calculate Block Size Compare Mag. of Slices Convert Bin->Txt Embed Message Recover Message
- 15. Mono Wav AM
- 16. Stereo Wav AM
- 17. AM Results Mono Stereo Input Output
Editor's Notes
- Art and science writing hidden messages no one suspects the existence of the message security through obscurity means "concealed writing" in Greek
- Shifting quantization bin/level by 0 or +-1, shifting time-domain amplitude, hiding as excessive quantization “noise”
- The dec2bin function in MATLAB produces a string of digit characters, while the de2bi function used in the last section produces a vector of numbers.