KTH&RWTH ： FlexCode

德国汉诺威大学：ASAC(Analysis/Synthesis Audio Coding)，也就是后来MPEG 4 Audio 里面的HLIN，主要开发者是Heiko Purnhagen

 

SiCAS(Sinusoidal Coding of Audio and Speech)：STW建立的工程，起始于1999，终止与2001，开发通用的音频编解码器，可以自适应输入参数，用户和时间变化常量。参与开发组织有，飞利浦实验室，瑞典皇家理工学院，荷兰代夫特工业大学。由荷兰科学研究组织(简称NWO)，德国史太白促进经济基金会（简称STW）支持。

ARDOR (Adaptive Rate-Distortion Optimized sound codeR)：E.U.（欧盟）建立的工程，起始于2002，终止月2005，参与研发组织，飞利浦实验室，法国电信研发中心，丹麦奥尔堡大学，德国汉诺威大学，瑞典皇家理工学院，荷兰代夫特工业大学。  E.U. 支持开发并授予代号IST-2001-34095。

测试用例：
The objective was to meet the need for a universal codec as created by the emergence of time-varying heterogeneous networks and by the convergence of traditional consumer electronics with mobile communications.

ASC(Adaptive Sound Coding):STW建立的工程，工程号，DET.5851。起始于2003年终止于2007年。参与开发的是荷兰代夫特工业大学。

One of the main objectives of the ASC project was to develop a universal audio codec capable of adapting to time-varying characteristics of

the input signal, user preferences, and application-imposed constraints or time-varying network-imposed constraints such as bit rate, quality, latency, bandwidth, and bit-error rate (or packet-loss rate).

FlexCodec:European project (2006-2009)

学术机构：瑞典皇家理工学院，德国亚琛工业大学

研发人员：Bastiaan Kleijn

参与支持的企业：爱立信，Orange集团，诺基亚

工程目标：

–develop a practical, flexible, parameterized, generic speech and audio coding system with the following properties:

•instantaneous adaptation to rate, quality, and robustness requirements;

•usage of advanced perceptual error criteria;

•adaptation to channel quality: packet loss rate and bit error rate;

•embedded bit rate scalability

•reasonable computational and memory complexity.

–demonstrate practical implementations of the proposed system for two relevant service applications, using speech and audio coding