The meaning of PULSE CODE MODULATION is modulation of a radio wave or signal in which the intelligence is conveyed by a code or order of pulses of the wave that are usually all of the same size and shape and that are transmitted at multiples of a standar
Pulse Code Modulation (PCM) is a method of transmitting data where the message is represented by a series of equal-height pulses, allowing for accurate regeneration of the original signal despite noise interference. It involves sampling, quantizing, and coding analog signals into binary numbers for...
PCM(Pulse Code Modulation)脉冲编码调制,是将连续的模拟信号变换成离散的数字信号的过程,是模数转换的实例化,步骤包括采样、量化、编码。在调制过程中将模拟信号每隔一定时间进行采样,使其离散化,同时将采样值按分层单位四舍五入取整量化,同时将采样值按一组二进制码来表示采样脉冲的幅值。 1、采样—通常为8000Hz:...
Pulse Code Modulation 英 [pʌls kəʊd ˌmɒdjʊˈleɪʃən] 美 [pʌls koʊd ˌmɑdʒəˈleɪʃən]网络 脉码调制; 脉冲编码调制; 脉冲码调制; 脉码调变; ...
This chapter discusses the pulse code modulation (PCM) system that is based on the European standard. The PCM system relies on many different processes and this chapter is devoted to explaining these different concepts. A number of analog signals are sampled to produce a time division multiplexed...
PCM(Pulse-code modulation)脉冲编码调制 在音频处理中,我们会经常听到PCM数据,那么什么是PCM数据呢? PCM数据就是模拟信号经过PCM以后的数字信号,PCM就是把音频信号由模拟信号(时间连续,取值连续)转为数字信号(时间离散,取值离散)的过程。数字信号有很多优点,因此一般传输的信号都是数字信号。
Pulse-code modulation 脉冲编码调制(Pulse Code Modulation,PCM),由A.里弗斯于1937年提出的,这一概念为数字通信奠定了基础,60年代它开始应用于市内电话网以扩充容量,使已有音频电缆的大部分芯线的传输容量扩大24~48倍。到70年代中、末期,各国相继把脉码调制成功地应用于同轴电缆通信、微波接力通信、卫星通信和...
抽样定理是任何模拟信号数字化的理论基础,PCM编码就是建立在抽样定理基础之上的,PCM编码主要包括抽样、量化、编码三个步骤。 (1)抽样:在满足抽样定理的条件下,每隔固定的时间间隔取出模拟信号的采样值,把连续时间的模拟信号转换成离散时间连续幅度的抽样信号。 (2)量化:将抽样取得的离散时间连续幅度的抽样信号转换成离...
PCM 中文称脉冲编码调制(Pulse Code Modulation,PCM),工作过程是有模拟信号转化为数字信号,这个过程中并...
PCM、PWM、PPM 脉冲编码调制(Pulse Code Modulation,PCM),简称脉码调制是一种模拟信号的数码化方法。PCM将信号的强度依照同样的间距分成数段,然后用独特的数码记号(通常是二进制)来量化。PCM常被用于数码电信系统上,在数字视频中它也是标准,但是PCM并不流行于诸如DVD或DVR的消费性商品上,因为它需要相当大的...