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Audio Watermarking - JIIT noida 2013-14 by Vaibhav Arora and Isha Garg

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Vaibhav Arora
Vaibhav Arora

This document discusses audio watermarking techniques for copyright protection. It describes embedding a watermark in the mid-range of an audio file's discrete cosine transform (DCT) blocks. Two types of circularly shifted versions of the original watermark are embedded to increase security. The watermarking algorithm can be applied to detect unauthorized distribution of audio files by extracting the embedded watermark and matching it to watermarks stored in a database.

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Least Significant Bit (LSB) Least Significant Bit (LSB) Discrete Cosine Transform Discrete Cosine Transform Padded Byte Stuffing Padded Byte Stuffing Data loss on Resampling Prone to lossy retrieval Data loss on Resampling Prone to lossy retrievalMore Robust Approach No Loss in data on Resampling More Reliable & Secure
DCT- Discrete Cosine Transform DCT- Discrete Cosine Transform
Embedding in Dual Channel More SecurityEmbedding in Dual Channel More Security Audio Sample Right Channel Left Channel Synchronization Code Selects the Channel Watermarked Audio Track Watermarked Audio Track
Inverse Discrete Cosine Transform Audio DataAudio Data Block 1 Block 1 Block 2 Block 2 Block 3 Block 3 Block n Block n Discrete Cosine Transform DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data Watermark Embedded in AudioWatermark Embedded in Audio Selecting Mid-Range of DCT BlockSelecting Mid-Range of DCT Block Mid Range
5 6 7 8 1 2 3 4 13 14 15 16 9 10 11 12 8 5 6 7 4 1 2 3 16 13 14 15 12 9 10 11 1 2 3 4 13 14 15 16 9 10 11 12 5 6 77 8 Original Watermark Circular Shifted Watermark- Type 1 Circular Shifted Watermark- Type 2 Circular Shifting of Original Watermark Circular Shifting of Original Watermark
Application of Detecting Distributor of unauthorized copy of Audio file based on the Algorithm Application of Detecting Distributor of unauthorized copy of Audio file based on the Algorithm APPLICATION
Watermark generation for client (unique key) Upload Audio Add Client for Audio Watermarked Audio is sent to client Unique Watermark stored in database for theft detection Login Panel Enter Client Details PUBLISHER MODULE
Watermark Extraction from audioUpload Audio Client Information DisplayedClient Information Displayed Fetching from Database [ FOUND ] DETECTION & TRACKING MODULE Login Panel KEY BASEDKEY BASED

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Audio Watermarking - JIIT noida 2013-14 by Vaibhav Arora and Isha Garg

  • 1. Least Significant Bit (LSB) Least Significant Bit (LSB) Discrete Cosine Transform Discrete Cosine Transform Padded Byte Stuffing Padded Byte Stuffing Data loss on Resampling Prone to lossy retrieval Data loss on Resampling Prone to lossy retrievalMore Robust Approach No Loss in data on Resampling More Reliable & Secure
  • 2. DCT- Discrete Cosine Transform DCT- Discrete Cosine Transform
  • 3. Embedding in Dual Channel More SecurityEmbedding in Dual Channel More Security Audio Sample Right Channel Left Channel Synchronization Code Selects the Channel Watermarked Audio Track Watermarked Audio Track
  • 4. Inverse Discrete Cosine Transform Audio DataAudio Data Block 1 Block 1 Block 2 Block 2 Block 3 Block 3 Block n Block n Discrete Cosine Transform DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data DCT Data Watermark Embedded in AudioWatermark Embedded in Audio Selecting Mid-Range of DCT BlockSelecting Mid-Range of DCT Block Mid Range
  • 5. 5 6 7 8 1 2 3 4 13 14 15 16 9 10 11 12 8 5 6 7 4 1 2 3 16 13 14 15 12 9 10 11 1 2 3 4 13 14 15 16 9 10 11 12 5 6 77 8 Original Watermark Circular Shifted Watermark- Type 1 Circular Shifted Watermark- Type 2 Circular Shifting of Original Watermark Circular Shifting of Original Watermark
  • 6. Application of Detecting Distributor of unauthorized copy of Audio file based on the Algorithm Application of Detecting Distributor of unauthorized copy of Audio file based on the Algorithm APPLICATION
  • 7. Watermark generation for client (unique key) Upload Audio Add Client for Audio Watermarked Audio is sent to client Unique Watermark stored in database for theft detection Login Panel Enter Client Details PUBLISHER MODULE
  • 8. Watermark Extraction from audioUpload Audio Client Information DisplayedClient Information Displayed Fetching from Database [ FOUND ] DETECTION & TRACKING MODULE Login Panel KEY BASEDKEY BASED