The principle and design process of the Quadrature Mirror Filter ( QMF) in 16 kbit/ s SB& PC speech compression coding system are discussed. The hardware and software structures for implementing QMF to split band are also given in the paper. 本文讨论了16kbit/s分带自适应(SB&APC)预测语音压缩编码系统中的正交镜象滤波器(QMF)的原理和设计过程,并给出了实现QMF的硬件和软件结构。
The Chinese vocabulary is an mirror that can reflects the charateristics of Chinese in many aspect: such as the semanteme, grammar, usage, etc. Meanwhile, verbs are an very important part of speech of Chinese vocabularies, which can change flexibly in the sentences. 现代汉语词汇是认识汉语的重要角度。词汇能从语义、语法、语用等多方面反映现代汉语的特点。动词是词汇中非常重要的一个词类,是句法中变化最灵活的一类词。