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Meritev kvalitete prenosa govora v IP telefoniji : diplomsko deloGrašič, SimonZ novim načinom prenosa govora (IP telefonija) so se pojavile zahteve po novih metodah določanja kvalitete telefonskih naprav. Meritve prenosnih karakteristik telefona so nadomestile meritve ... kvalitete govora, ki še niso natančno določene in ovrednotene. V nalogi so primerjane štiri metode ocenjevanja kvalitete govora v odvisnosti od obremenitve računalniške mreže. Privzeto je, da je referenčna metoda meritev subjektivne ocene kvalitete govora, kot so jo ovrednotili poslušalci. Z rezultati te metode se primerjajo rezultati ostalih treh. Rezultati metode, kot jo predlaga trenutni standard, naj bi se subjektivnim ocenam najbolje približali. Kvaliteta govora je bila ocenjena tudi z meritvijo harmonskega popačenja, ki je v analognih in digitalnih ISDN telefonih uporabljena za določanje kvalitete telefona. Izvedba teh metod je draga, ali pa je zanjo potrebna posebna oprema. Metoda meritve povprečne amplitude je zelo preprosta. V nalogi je prikazano, da so rezultati po tej metodi primerljivi z rezultati subjektivne ocene kvalitete govora.Type of material - undergraduate thesisPublication and manufacture - Ljubljana : [S. Grašič], 2002Language - slovenianCOBISS.SI-ID - 26256389
Author
Grašič, Simon
Other authors
Ponikvar, Dušan |
Lah, Igor, 1962-
Topics
telekomunikacijski sistemi |
IP telefonija |
prenos govora |
kvaliteta govora |
meritve kvalitete
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Library/institution |
City | Acronym | For loan | Other holdings |
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FMF, Physical, Astronomical and Meteorological Library, Ljubljana | Ljubljana | FMFFIZ |
reading room 1 cop.
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Year | Impact factor | Edition | Category | Classification | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Grašič, Simon | 25222 |
Ponikvar, Dušan | 00400 |
Lah, Igor, 1962- | 32397 |
Source: Personal bibliographies
and: SICRIS
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