四川邮电职业技术学院教案专用纸 In these descriptions we shall see how a speech channel of elephone quality may be conveyed as a series of amplitude values, each value being represented ( 3), that is, coded, as(3,)a sequence of 8 binary digits 在这些讨论中,我们会看到话路中的语声信号是如何转换成一个幅值 序列的,而每个幅值又被编码,即以8位二进制数的序列表示 (3). each value being represented这是一种独立分词结构,用 来表示一种伴随状态,作状语可译成:“而每一幅值被表示为”.独立分 词结构在科技文章中相当常见,例如 There are many kinds of steel, each having its uses in industry. 译为:“钢有许多种,在工业中每种都有它自己的用途” 独立分词结构还可以表示时间、原因或条件等,对主句进行补充说明 例如表示原因 r The resistance being very high, the current in the circuit was 译为:“由于电阻很高,故电路里的电流很小 (3,). as a sequence of8 binary digits句中的as意为“作为, 表为,成为”.该短语可译成:“(表为)8位二进制码的序列” Furthermore(4), we shall prove that a minimum theoretical sampling frequency of order 6.8 kilohertz(kHz) is required to convey a voice channel occupying the range 300 Hz to 3. 4kHz(4a). Practical equipments, however, normally use a sampling rate of 8 kHz, and 8-digits per sample value are used, the voice channel becomes represented by a stream of pulses(4b)with a repetition rate of 64 kHz. Fig. 1-l illustrates the sampling, quantizing, and coding processes. 而且,我们将证明,为了变换频率范围300Hz34KHz的话路信号,理论 上的最小采样频率为608KHz但是,实际设备通常用8Kz的采样速率而如 果每个样值用8位码的话则话路是由一个重复速率为64KHz的脉冲流来 表示的.图1-1表示了采样、量化和编码的过程 (4). furthermore:adv.“而且;此外” Furthermore, these child-raising families may raise other eople 's children in addition to their own而且,这些抚养孩子 的家庭除了自己的孩子外也可以抚养其他人家的孩子 The house is too small. and furtherm office.这座房子太小,而且离办公地点也太远。 同义词: again,also, besides, by the same token, in addition, likewise, similarly, then, too (4a)。脉冲流 Teaching Plan of English for Telecommunications Unit One四川邮电职业技术学院教案专用纸 Page 6 of 12 Teaching Plan of English for Telecommunications Unit One In these descriptions we shall see how a speech channel of telephone quality may be conveyed as a series of amplitude values, each value being represented (3), that is, coded, as (3’) a sequence of 8 binary digits. 在这些讨论中,我们会看到话路中的语声信号是如何转换成一个幅值 序列的,而每个幅值又被编码,即以 8 位二进制数的序列表示. （3）. each value being represented 这是一种独立分词结 构，用 来表示一种伴随状态，作状语.可译成：“而每一幅值被表示为”.独立分 词结构在科技文章中相当常见，例如： There are many kinds of steel, each having its uses in industry. 译为：“钢有许多种，在工业中每种都有它自己的用途”. 独立分词结构还可以表示时间、原因或条件等，对主句进行补充说明. 例如表示原因： The resistance being very high, the current in the circuit was low. 译为:“由于电阻很高，故电路里的电流很小”. (3’).as a sequence of 8 binary digits 句中的 as 意为“作为， 表为，成为”.该短语可译成:“(表为)8 位二进制码的序列”. Furthermore (4), we shall prove that a minimum theoretical sampling frequency of order 6.8 kilohertz (kHz) is required to convey a voice channel occupying the range 300 Hz to 3.4 kHz(4a). Practical equipments, however, normally use a sampling rate of 8 kHz, and if 8-digits per sample value are used, the voice channel becomes represented by a stream of pulses (4b) with a repetition rate of 64 kHz. Fig. 1-1 illustrates the sampling, quantizing, and coding processes. 而且,我们将证明,为了变换频率范围 300Hz~3.4KHz 的话路信号,理论 上的最小采样频率为608KHz.但是,实际设备通常用8KHz的采样速率,而如 果每个样值用 8 位码的话,则话路是由一个重复速率为 64KHz 的脉冲流来 表示的. 图 1-1 表示了采样、量化和编码的过程. （4）. furthermore: adv.“而且；此外” Furthermore, these child-raising families may raise other people‘s children in addition to their own. 而且,这些抚养孩子 的家庭除了自己的孩子外也可以抚养其他人家的孩子。 The house is too small, and furthermore, it's too far from the office. 这座房子太小,而且离办公地点也太远。 同义词：again, also, besides, by the same token, in addition, likewise, similarly, then, too. (4a)。 脉冲流