基于软切换方式的双声道高分离度编码器设计  

Design of dual-channel and high separation encoder based on soft handoff

作　　者：高丙坤[1,2] 许明子[1] 高润柠[1] 

机构地区：[1]东北石油大学电气信息工程学院,黑龙江大庆163318 [2]黑龙江省油田控制与信息工程重点实验室,黑龙江大庆163318

出　　处：《大庆石油学院学报》2010年第5期154-156,174,共4页Journal of Daqing Petroleum Institute

基　　金：黑龙江省科技计划项目(GZ07A104);国家大学生创新实验计划项目(091022019)

摘　　要：针对立体声道编码要求,分析双声道编码常用方法,比较数字频率合成调制、"硬"和"软"切换方式,确定采用"软"切换方式的双声道编码器设计方案,给出多级脉冲向余弦波逼近的副载波形态;基于左、右声道"和"、"差"信号,推导立体声合成基带信号数学模型,设计十六级软切换双声道编码器.测试结果表明,该编码器较在用的同类产品分离度高5～10dB,能够提高立体声的质量.According to requirements of the stereo channels coding,this paper analyzes common method of dual-channel coding,and adopts the scheme of dual-channel encoder based on soft handoff by comparison of digital frequency synthetic modulation,hard handoff and soft handoff,and gives subcarrier form which multi-level pulse approach cosine wave,theoretical analysis shows that there is direct relationship between the level of soft handoff and the separation of encoder.Thereby deduces a mathematical model for syntheti...

关 键 词：编码器 双声道 高分离度 软切换 

分 类 号：TN762[电子电信—电路与系统]