Progressive Audio Scrambling in Compressed Domain

WeiQi Yan

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


Audio scrambling can be employed to ensure confidentiality in audio distribution. We first describe scrambling for raw audio using the discrete wavelet transform (DWT) first and then focus on MP3 audio scrambling. We perform scrambling based on a set of keys which allows for a set of audio outputs having different qualities. During descrambling, the number of keys provided and the number of rounds of descrambling performed will decide the audio output quality. We also perform scrambling by using multiple keys on the MP3 audio format. With a subset of keys, we can descramble to obtain a low quality audio. However, we can obtain the original quality audio by using all of the keys. Our experiments show that the proposed algorithms are effective, fast, simple to implement while providing flexible control over the progressive quality of the audio output. The security level provided by the scheme is sufficient for protecting MP3 music content.
Original languageEnglish
Article number4657456
Pages (from-to)960-968
Number of pages9
JournalIEEE Transactions on Multimedia
Issue number6
Publication statusPublished - Oct 2008

ASJC Scopus subject areas

  • Computer Science Applications
  • Signal Processing
  • Electrical and Electronic Engineering
  • Media Technology


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