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1	Simulace zkreslení zvukového signálu v percepčním zvukovém kodéru / Simulation of Audio Signal Distortion in Perceptual Audio Encoder Peloušek, Tomáš January 2021 (has links) This thesis deals with the issue of the creation of a programme that would simulate the distortion that appears during the process of lossy audio coding. As the environment for the creation, the MATLAB programming language has been chosen. An encoder, which changes the subjective signal quality according to customer preferences for the bitrate, has been created as a practical part of this thesis. Its function is based on a dynamic bit allocation technique and includes an optional window switching algorithm. The theoretical background for the creation of the programme consists of an explanation of the main principles of lossy coding with emphasis on MPEG1 layer 3 operating principles. The practical chapter describes how the created programme and its parts work, and it includes results of the run quality testing. The testing was conducted using the objective assessment method PEMO-Q, and consisted of comparing the objective quality of the programme’s outputs to the quality of samples on which a regular MP3 encoder with identical settings was used.
2	Comparing the Legibility and Comprehension of Type Size, Font Selection and Rendering Technology of Onscreen Type Chandler, Scott Bondurant 27 November 2001 (has links) This experimental study investigated the relationship between the independent measures of font selection, type size, and type rendering technology and the dependent measures of legibility, as measured by the Chapman-Cook speed of reading test, as well as comprehension, as measured by a series of questions from the verbal comprehension section of the Graduate Record Exam. An electronic instrument presented test items in 12 different typographic styles. The study tested 117 college students at a university in southwestern Virginia. Each participant encountered anti-alias type rendering style and the orthochromatic type rendering style while participants were randomly assigned to either Helvetica or Palatino (font selection) and 8, 10 or 12 point type size. Results indicated that the 12 point type size was read more quickly than either 8 point type or 10 point type. There was also an interaction between font selection and type rendering technology for speed of reading: Helvetica without an anti-alias was read more quickly than Helvetica with an anti-alias and more quickly than Palatino without an anti-alias. These findings contradict an earlier, similar study. There were no significant results with regard to comprehension. <i>[Vita removed Oct. 13, 2010. GMc]</i> / Ph. D. Education comprehension type size reading speed type rendering technology perceptual encoding speed of reading Palatino legibility sans-serif computer serif Helvetica orthochromatic font selection effectiveness type anti-alias typography

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Simulace zkreslení zvukového signálu v percepčním zvukovém kodéru / Simulation of Audio Signal Distortion in Perceptual Audio Encoder

Comparing the Legibility and Comprehension of Type Size, Font Selection and Rendering Technology of Onscreen Type