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发明名称
传送和包装讯号的数位编码方法与结构
摘要
一种数位编码的方法,将输入音讯转换成频率样本序列,以代表该音讯的一种频谱合成;并且根据一种位元分配程序,将此频率样本序列量化成量化值。藉由一个遮罩门槛值,此位元分配程序利用一个参数预估器来预估量化参数。此量化值被编码成包含复数个位元的已编码资料。如果此已编码资料的位元数超过此已编码资料的一个预定的可用位元数,则一个反覆比率控制回圈会调整量化参数和量化间隔大小。在量化频率样本序列之前,此方法也会根据一个砍除频率,将输入音讯的高频率分量砍除,此砍除频率是由反覆比率控制回圈来决定的。
申请公布号
TW200410201
申请公布日期
2004.06.16
申请号
TW091136087
申请日期
2002.12.13
申请人
国立交通大学
发明人
刘启民;李文杰
分类号
G10L21/00
主分类号
G10L21/00
代理机构
代理人
吴宏山
主权项
地址
新竹市东区大学路一○○一号
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