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The perceptual impact of different quantization schemes in G.719
KTH, School of Electrical Engineering (EES), Communication Theory.
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In this thesis, three kinds of quantization schemes, Fast Lattice Vector Quantization (FLVQ), Pyramidal Vector Quantization (PVQ) and Scalar Quantization (SQ) are studied in the framework of audio codec G.719. FLVQ is composed of an RE8 -based low-rate lattice

vector quantizer and a D8 -based high-rate lattice vector quantizer. PVQ uses pyramidal

points in multi-dimensional space and is very suitable for the compression of Laplacian-like sources generated from transform. SQ scheme applies a combination of uniform SQ and entropy coding. Subjective tests of these three versions of audio codecs show that FLVQ and PVQ versions of audio codecs are both better than SQ version for music signals and SQ version of audio codec performs well on speech signals, especially for male speakers.

Place, publisher, year, edition, pages
2013. , 58 p.
Series
EES Examensarbete / Master Thesis
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-141384OAI: oai:DiVA.org:kth-141384DiVA: diva2:696519
Educational program
Master of Science - Wireless Systems
Presentation
2013-05-08, 10:00 (English)
Supervisors
Examiners
Available from: 2014-02-17 Created: 2014-02-14 Last updated: 2014-02-17Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf