Evaluating Long-form Text-to-Speech: Comparing the Ratings of Sentences and Paragraphs
Table 2: Regression model coefficients for predicting the paragraph MOS from individual sentence MOS for paragraphs of lengths two, three and four sentences long (news reading data).
['[BOLD] Model for paragraphs of two sentences Num. of paragraphs', '[BOLD] Model for paragraphs of two sentences Num. of paragraphs', '[BOLD] Model for paragraphs of two sentences Num. of paragraphs', '[BOLD] Model for paragraphs of two sentences 46', '[BOLD] Model for paragraphs of two sentences 46']
First, we note that the only model with a significant R-squared value, i.e., that can account for a variance in a significant way, is the model for paragraphs of three sentences. For this model the only significantly non-zero contribution is made by the MOS of the first sentence. That trend is not repeated for the other models.