Abstract: The present invention relates to a method of synthesizing a first sound signal based on a second sound signal, the first sound signal having a required first fundamental frequency and the second sound signal having a second fundamental frequency, the method comprising the steps of, a) determining of required pitch bell locations in the time domain of the first sound signal, the pitch bell locations being distanced by one period of the first fundamental frequency, b) providing of pitch bells by windowing the second sound signal on pitch bell locations in the time domain of the second sound signal, the pitch bell locations being distanced by one period of the second fundamental frequency, c) randomly selecting of a pitch bell from the provided pitch bells for each of the required pitch bell locations, d) performing an overlap and add operation on the selected pitch bells for synthesizing the first signal.

Abstract: The invention relates to a method of synthesizing a signal comprising the steps of: a) providing of a first signal having first periods of a first type and second periods of a second type in an alternating sequence, b) selecting of one of the pitch bells for a first one of the required pitch bell locations by identifying the nearest neighboring period of the first one of the required pitch bell locations being of the first type, and selecting of the pitch bell of the identified period, c) selecting of one of the pitch bells for a second one of the required pitch bell locations by identifying a nearest neighboring period of the second one of the required pitch bell locations having the second type, and selecting the pitch bell of the identified period, whereby the steps b) and c) are carried out for all of the required pitch bell locations.

Abstract: The invention relates to a method of synthesizing of a speech signal, the speech signal having at least a first speech unit and a second speech unit, the method comprising the steps of: providing a first speech unit signal, the first speech unit signal having an end interval, providing a second speech unit signal, the second speech unit signal having a front interval, appending of at least some of the periods of the end interval in inverted order at the end of the first speech unit signal to provide a fade-out interval, appending of at least some of the periods of the front interval in inverted order at the beginning of the second speech unit signal to provide a fade-in interval, superposing of the end and fade-in intervals and of the fade-out and front intervals.

Abstract: The present invention relates to a method of synthesizing a signal comprising th steps of: a) determining of a required pitch bell location on the signal to be synthesized. b) mapping of the required pitch bell location onto an original signal to provide a first pitch bell location, c) randomizing the first pitch bell location to provide a second pitch bell location, d) windowing of the original signal on the second pitch bell location to provide a pitch bell, e) placing the resulting pitch bell at the required pitch bell location within the domain of the signal to be synthesized, f) repeating of the steps a) to e) for all required pitch bell locations and performing an overlap and add operatio with respect to the pitch bells in order to synthesize the signal.

Abstract: The present invention relates to a method of synthesizing of a speech signal, comprising: -assigning of a first identifier to a first class of intervals of an original speech signal and assigning of a second identifier to a second class of intervals of the original speech signal, -windowing the original speech signal to provide a number of pitch bells, -processing the pitch bells having the first identifier assigned thereto for modifying a duration of the speech signal, -performing an overlap and add operation on the processed pitch bells.

Abstract: The present invention relates to a method for analyzing speech, the method comprising the steps of: a) inputting a speech signal, b) obtaining the first harmonic of the speech signal, c) determining the phase-difference Df between the speech signal and the first harmonic.

Abstract: The invention relates to method and unit for substracting quanti zafion noise from a pulse code modulated PCM signal being segmented into frames. For achieving this it is proposed to first calculate for each frame of said PCM signal a quantization noise level Bq according to the following equation (I) wherein n indicates a specific sample of the PCM signal, S*min[n] represents the minim um quantization noise level for a specific sample value s*[n] of said PCM signal, S*max[n] represents the maximum quantization noise level for the specific sample value s*[n] of the PCM signal, w[n] represents a window-function and W represents the number of samples per window. Subsequently, the quantization noise as represented by said quantization noise level Bq has to be substracted from said PCM signal, preferably with the help of a suitable background noise substracting system.