Industrial Technology Research Institute

Electronics Research & Service Organization

Gang-Janp Lin

Sau-Gee Chen

Yen-Hui Wang

Der-Chwan Wu

Yuan-An Kao

A method is disclosed of modification of parameters of audio signals by dividing a digital signal converted from an original analog signal into sound frames, modifying a pitch and a playing rate of the digital signal within a frame and subsequent successive splicing a last modified frame with a first non-modified frame and calculating the mean absolute error to define the best splicing point in terms of producing minimal or no audible noise such that various sections of sound signals can be spliced together to achieve pitch and playing rate modification. An apparatus is also disclosed for implementing the method, the apparatus comprising input and output amplifiers, a low pass filter at the input and a low pass filter at the output, analog-to-digital and digital-to-analog converters, and a pitch shifting processor.

High-effeciency algorithms using minimum mean absolute error splicing

An efficient micro architecture for motion estimation is proposed. It achieves better time and area performance over the existing structures. Through pipelining and effective manipulation of 2's complement arithmetic, the adder complexity is kept to its lowest, while speed for a combined subtraction, absolution and accumulation operations is made as fast as a carry-save addition (CSA).

Growing community of inventors

Taur-Yuan, Taiwan

Gang-Janp Lin