The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 25, 2001
Filed:
Mar. 15, 1999
Wenshun Tian, Singapore, SG;
Tritech Microelectronics Ltd., Singapore, SG;
Abstract
Speech is synthesized by optimizing frame data containing an excitation signal and impulse response filter coefficients, and convolving the excitation signal and impulse response filter coefficients more efficiently and with fewer multiplications and additions. The method to convolve begins by determining a number of non-zero pulses within said excitation signal. The pulse locations are sorted for the zero and non-zero pulses. The non-zero pulses are then ranked in order of time. The codebook contributions for the synthesized output signal having an index value less than a lowest rank non-zero pulse are set to a zero value. Each remaining codebook contribution for the synthesized signal is determined by convolving each non-zero pulse within said excitation signal with each impulse response function.