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Task #4343

closed

Task #4329: Dílčí zpráva 2017

Task #4342: Část DC - rozbor řešení (FF UK)

Popis řešení projektu - část RA2

Added by Matoušek Jindřich over 7 years ago. Updated about 7 years ago.

Status:
Closed
Priority:
Normal
Target version:
Start date:
28.11.2017
Due date:
15.12.2017
% Done:

100%

Estimated time:

Description

Vypracovat popis řešení projektu - část RA2abc)

Počet znaků: cca 1000

Actions #1

Updated by Skarnitzl Radek about 7 years ago

  • Status changed from New to Resolved
  • % Done changed from 0 to 100

In RA2, the work focused on the perceptual testing of intrusive phenomena, mostly in the spectral domain and in the domain of fundamental frequency (F0). Preliminary analyses revealed that a great majority of the problems resulting from contextual incongruity (i.e., the effect of labial, palatal, or nasal contexts; see RA2a) can be captured by the formant values (RA2c). This led to the creation of a perception test where formant frequencies were manipulated in a controlled way so as to create artificial discontinuities. Subsequent perceptual testing showed that formant discontinuities may have serious perceptual repercussions, affecting the perceived length of the vowels in question; since Czech is a language with distinctive vowel length, this was a very important finding, published in Interspeech 2017 proceedings. F0 shifts (RA2b) yielded no such effects, but work is currently continuing on preparing more sophisticated F0 discontinuities (see RA3c).

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