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dc.contributor.authorSalavedra Molí, Josep
dc.contributor.authorMasgrau Gómez, Enrique José
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.date.accessioned2016-07-06T12:40:05Z
dc.date.available2016-07-06T12:40:05Z
dc.date.issued1996
dc.identifier.citationSalavedra, J., Masgrau, E. Codificación APVQ de voz en banda ancha para velocidades entre 16 y 32 KBPS. A: Simposium Nacional de la Unión Científica Internacional de Radio. "URSI 1996: XI Simposium Nacional de la Unión Científica Internacional de Radio: Madrid: 18 al 20 septiembre de 1996". Madrid: 1996, p. II-482-II-485.
dc.identifier.urihttp://hdl.handle.net/2117/88541
dc.description.abstractThis paper describes a coding scheme for broadband speech (sampling frequency 16KHz). We present a wideband speech encoder called APVQ (Adaptive Predictive Vector Quantization). It combines Subband Coding, Vector Quantization and Adaptive Prediction as it is represented in Fig. I. Speech signal is split in 16 subbands by means of a QMF filter bank and so every subband is 500Hz wide. This APVQ encoder can be seen as a vectorial extension of a conventional ADPCM encoder. In this scheme, signal vector is formed with one sample of the normalized prediction error signal coming from different subbands and then it is vector quantized. Prediction error signal is normalized by its gain and normalized prediction error signal is the input of the VQ and therefore an adaptive Gain-Shape VQ is considered. This APVQ Encoder combines the advantages of Scalar Prediction and those of Vector Quantization. We evaluate wideband speech coding in the range from 1 to 2 bits/sample, that leads to a coding rate from 16 to 32 kbps.
dc.language.isospa
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal::Processament de la parla i del senyal acústic
dc.subject.lcshSpeech processing systems
dc.titleCodificación APVQ de voz en banda ancha para velocidades entre 16 y 32 KBPS
dc.typeConference report
dc.subject.lemacProcessament de la parla
dc.contributor.groupUniversitat Politècnica de Catalunya. VEU - Grup de Tractament de la Parla
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
drac.iddocument18736251
dc.description.versionPostprint (published version)
upcommons.citation.authorSalavedra, J.; Masgrau, E.
upcommons.citation.contributorSimposium Nacional de la Unión Científica Internacional de Radio
upcommons.citation.pubplaceMadrid
upcommons.citation.publishedtrue
upcommons.citation.publicationNameURSI 1996: XI Simposium Nacional de la Unión Científica Internacional de Radio: Madrid: 18 al 20 septiembre de 1996
upcommons.citation.startingPageII-482
upcommons.citation.endingPageII-485


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