Viiv, Platform Audio Algorithm Design And Implementation

From AC'97 to the latest HD Audio, Intel has achieved a great success on the development of audio criterion. It will bring richer experience for user to integrate audio processing algorithms to HD Audio. HD Audio meets the need for low latency of time for these audio effects, and its multi-channels input and output supporting these audio effects is better than AC'97.This paper covers three parts of audio technology including HD Audio, New Vista audio architecture and Dolby audio surround technique. Intel VIIV is based on HD Audio, and in order to support VIIV home entertainment audio effects on Vista system, Intel ported all the audio algorithms to Vista platform and carried all these audio effects into Vista system.This paper is completed under this background. The main work is as follows: Firstly HD Audio hardware system, the mechanism how to process audio stream and the reason why HD Audio outgoes AC'97 on audio effects is given. Secondly detailed research on audio architecture of Vista and its software support for stream processing is estimated. At the same time further audio programming interface of Vista system was researched, which is the premise to do the development on Vista. Vista audio architechture that is very different from previous Windows system is difficult to apply audio effects to it.This paper includes two tasks. Firstly the audio effects implementation on Vista by studying the achievement and source code on Windows XP system is introduced. Secondely Redirection/Cloning module design is discussed in great detail. Redirection/Cloning module is mainly applied to PC which uses HD Audio and has 8-10 jacks. Users can experience Redirection/Cloning audio effect by the UI designed in this paper.