PCM(脉冲编码调制)介绍及PCM编码的原理毕业论文---PCM量化13折线.docx

PCM（脉冲编码调制）介绍及 P CMa码的原理
摘要
在数字通信信道中传输的信号是数字信号， 数字传输随着微电子技术和计
算机技术的发展，其优越性日益明显，优点是抗干扰强、失真小、传输特性稳
定、远距离中继噪声不积累、还可以有效编码、译码和保密编码来提高通信系 统的有效性，可靠性和保密性。另外，还可以存储，时间标度变换，复杂计算 处理等。
而模拟信号数字化属信源编码范围， 当然信源编码还包括并 / 串转换、加密 和数据压缩。这里重点讨论模拟信号数字化的基本方法——脉冲编码调制，而 模拟信号数字化的过程（得到数字信号）一般分三步：抽样、量化和编码。
本文讲述了 PC（脉冲编码调制）的简单介绍，以及 PCM编码的原理，并分 别对PCM的各个过程，如基带抽样、带通抽样、13折线量化、PCMS码以及PCM 译码进行了详细的论述，，通过仿真结果， 对语音信号的均匀量化以及非均匀量化进行比较，我们得出非均匀量化教均匀 量化更加有优势。
关键词：脉冲编码调制
抽样 非均匀量化 编码 译码
Abstract
In the digital communication channel signal is digital signal transmission, digital transmission with the microelectronics and computer technology, its advantages become increasingly evident, the advantage of strong anti-interference, distortion, transmission characteristics of stable, long-distance relay is not the accumulation of noise Can also be effective encoding, decoding and security codes to improve the effectiveness of communications systems, reliability and confidentiality.
Digitized analog signal range of source coding is, of course, also include the source code and / serial conversion, encryption and data compression. This focus on the simulation of the basic methods of digital signals - pulse code modulation, while the analog signal the digital process (to get digital signals) generally three steps: sampling, quantization and coding.
This paper describes the PCM (pulse code modulation) in a brief introduction, and the PCM coding theory, and were all on the PCM process, such as baseband sampling, bandpasssampling, 13 line quantization, PCM encoding and decoding
PCM a detailed Are discussedand the process is simulated on , the simulation results, the uniformity of the speech signal quantification and comparison of non-uniform quantization, we have come to teach non-uniform quantization advantage of more than uniform quantization
Keywords ： Pulse Code Modulation Sampling Non-uniform quantization
Coding Decoding
目录
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前言
PCM原理……



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