Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloPerception-Based Partial Encryption of Compressed Speech
Anno di pubblicazione2002
Formato-
Autore/iA. Servetti, J. C. De Martin
Affiliazioni autoriDe Martin: IEIIT-Torino Servetti: Politecnico di Torino
Autori CNR e affiliazioni
  • JUAN CARLOS DE MARTIN
Lingua/e-
AbstractMobile multimedia applications, the focus of many forthcoming wireless services, increasingly demand low-power techniques implementing content protection and customer privacy. In this paper low complexity perception-based partial encryption schemes for speech are presented. Speech compressed by a widely-used speech coding algorithm, the ITU-T G.729 standard at 8 kb/s, is partitioned in two classes, one, the most perceptually relevant, to be encrypted, the other, to be left unprotected. Two partial-encryption techniques are developed, a low-protection scheme, aimed at preventing most kinds of eavesdropping and a high-protection scheme, based on the encryption of a larger share of perceptually important bits and meant to perform as well as full encryption of the compressed bitstream. The high-protection scheme, based on the encryption of about 45% of the bitstream, achieves content protection comparable to that obtained by full encryption, as verified by both objective measures and formal listening tests. For the low-protection scheme, encryption of as little as 30% of the bitstream virtually eliminates intelligibility as well as most of the remaining perceptual information. Low-power, portable devices could therefore achieve very high levels of speech-content protection at only 30–45% of the computational load of current techniques, freeing resources for other tasks and enabling longer battery life.
Lingua abstract-
Altro abstract-
Lingua altro abstract-
Pagine da637
Pagine a643
Pagine totali-
RivistaIEEE transactions on speech and audio processing
Attiva dal 1993 al 2005
Editore: Institute of Electrical and Electronics Engineers, - New York, NY
Paese di pubblicazione: Stati Uniti d'America
Lingua: inglese
ISSN: 1063-6676
Titolo chiave: IEEE transactions on speech and audio processing
Titolo proprio: IEEE transactions on speech and audio processing
Titolo abbreviato: IEEE trans. speech audio process.
Titoli alternativi:
  • Institute of Electrical and Electronics Engineers transactions on speech and audio processing
  • Transactions on speech and audio processing
  • Speech and audio processing
Numero volume della rivista10
Fascicolo della rivista-
DOI-
Verificato da referee-
Stato della pubblicazione-
Indicizzazione (in banche dati controllate)-
Parole chiavevoice processing, encryption, security, voice quality
Link (URL, URI)-
Titolo parallelo-
Data di accettazione-
Note/Altre informazioni-
Strutture CNR
  • IEIIT — Istituto di elettronica e di ingegneria dell'informazione e delle telecomunicazioni
Moduli CNR-
Progetti Europei-
Allegati

    Dati storici
    I dati storici non sono modificabili, sono stati ereditati da altri sistemi (es. Gestione Istituti, PUMA, ...) e hanno solo valore storico.
    Area disciplinareInformation Technology & Communications Systems
    Area valutazione CIVRIngegneria industriale e informatica
    Rivista ISIIEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING [11178J0]
    Descrizione sintetica del prodottoMobile multimedia applications, the focus of many forthcoming wireless services, increasingly demand low-power techniques implementing content protection and customer privacy. In this paper low complexity perception-based partial encryption schemes for speech are presented. Speech compressed by a widely-used speech coding algorithm, the ITU-T G.729 standard at 8 kb/s, is partitioned in two classes, one, the most perceptually relevant, to be encrypted, the other, to be left unprotected. Two partial-encryption techniques are developed, a low-protection scheme, aimed at preventing most kinds of eavesdropping and a high-protection scheme, based on the encryption of a larger share of perceptually important bits and meant to perform as well as full encryption of the compressed bitstream. The high-protection scheme, based on the encryption of about 45% of the bitstream, achieves content protection comparable to that obtained by full encryption, as verified by both objective measures and formal listening tests. For the low-protection scheme, encryption of as little as 30% of the bitstream virtually eliminates intelligibility as well as most of the remaining perceptual information. Low-power, portable devices could therefore achieve very high levels of speech-content protection at only 30–45% of the computational load of current techniques, freeing resources for other tasks and enabling longer battery life.