多媒體聲/視訊信號處理於數位信號處理器之實現

Abstract

在本文中，我們利用DSP處理器分別設計了一個數位音訊處理器和一個數 位取像系統。音訊處理器部份包括了音高調整、人聲消除、迴音、音訊速 率調整和音調控制五大功能。而數位取像系統則具備了色彩分離、色彩修 正、Gamma修正、邊線加強、白色平衡和亮度調整等色彩處理功能。對於 每一項功能，我們都發展了數種方法以適合DSP的應用，並盡量提高各種 影音功能的品質。 In the thesis, we develop a digital audio processor and a digital imaging system using TI TMS series DSP processors. The audio processor has five functions, including pitch shifting, vocal cancellation, echo emulation, playing rate control and tone control. The DSP-based digital imaging system is capable of performing six required signal reconstruction functions, they are, color separation, color correction, Gamma correction, edge enhancement, white balance and brightness adjustment. In the design process, various DSP techniques for image and audio processing are studied, improved and tailored for efficient DSP realizations.