Pulse code modulation

Advanced Computer Networks: Lecture 39. This lecture will cover the following: presentation formatting; data compression; eXternal Data Representation (XDR); abstract syntax notation one (ASN-1); run length encoding (RLE); differential pulse code modulation (DPCM);...

32p haoasakura 30-05-2022 18 3   Download

Lecture Data Communication: Lesson 16 present the content: analog-to-digital conversion, pulse amplitude modulation (PAM), pulse code modulation (PCM), quantization, binary encoding, digital-to-digital conversion,...

30p bachdangky 06-09-2021 8 1   Download

The following will be discussed in this chapter: Data representation, signaling, encoding techniques, digital data, digital signals (line coding), advantages of digital transmission, disadvantages of digital transmission, signal elements vs. data elements, data rate vs. signal rate (bit rate vs. baud rate/pulse rate/modulation rate), unipolar encoding,…

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Chapter 11 provides knowledge of JPEG. This chapter presents the following content: What is JPEG? Basic JPEG compression pipeline, major coding algorithms in JPEG, quantisation, quantisation tables, differential pulse code modulation (DPCM) on DC component, run length encode (RLE) on AC components,...

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Another source of error due to filtering effect of the system: Intersymbol. interference (ISI) The techniques to reduce ISI. Pulse shaping to achieve zero ISI at the sampling time. Equalization to combat the filtering effect of the channel.Some bandpass modulation schemes used in DCS for transmitting information oer channel. MPAM, MPSK, MFSK, MQAM How to detect the transmitted information at the receiver. Coherent detection. Noncoherent detection.

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Transforming the information source to a form compatible with a digital system. Sampling. Aliasing. Quantization Uniform and non-uniform. Baseband modulation. Binary pulse modulation. M-ary pulse modulation. M-PAM (M-ary Pulse amplitude modulation).Assuming real time transmission and equal energy per transmission data bit for binary-PAM and 4-ary PAM

22p doanhung_dtvtk10 24-03-2013 68 7   Download

This best-selling, easy to read book offers the most complete discussion on the theories and principles behind today's most advanced communications systems. Throughout, Haykin emphasizes the statistical underpinnings of communication theory in a complete and detailed manner. Readers are guided though topics ranging from pulse modulation and passband digital transmission to random processes and error-control coding. The fifth edition has also been revised to include an extensive treatment of digital communications....

384p beobobeo 01-08-2012 86 15   Download

Mã hóa kênh ( Channel coding ) Mã hóa khối (Block codes) + Mã lập (Repetition Code) + Hamming codes + Cyclic codes * Reed-Solomon codes Mã hóa chập (Convolutional codes) + Encode + Decode Sơ đồ khối hệ thống DCS Source encode Channel encode Pulse modulate Bandpass modulate Channel Format Digital modulation Digital demodulation Format Source decode Channel decode Detect Demod.

36p muaythai4 29-10-2011 570 140   Download

Sự biểu diễn này không có ý nghĩa gì về mặt vật lý, và chức năng của sự biểu diễn này, như chúng ta muốn, chỉ dùng trong lĩnh vực xử lý tín hiệu số. Tất cả các tín hiệu số này gọi là điều mã xung (Pulse Code Modulated - PCM). Để có thể thực sự thấy giá trị các mức xám chúng ta cần lượng tử hoá ngược. Trong bước này, các giá trị nhị phân biểu diễn một độ chói cụ thể.

12p myxaodon09 07-06-2011 69 12   Download

Digital Transmission and Pulse Code Modulation Following trials in the196Os, digital telecommunications systems were first widely deployed in the 1970s. Since then, the miniaturization and large scale integration of electronic components and the rapid advancein computer technology have made digital technology the obvious for all choice newtelecommunicationstransmissionandswitchingsystems.Now,inthenetworks of most countries and with world wider international satellite and submarine networks, digital transmission has no rivals. ...

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Laboratory Procedure I . PCM Familiarization A. The analog to digital conversion properties of the PCM was investigated in the last experiment. The “start” bit and the 7 data bits and two “stop” bits were identified. It was also found that if the parity switch is on, then the 1st stop bit is changed to an even parity bit. That is, the 7 data bits plus the parity bit will always be an even number (refer to figure 8 B) B. Set up Figure 8A. the MSB-LSB quantization switches are to be implemented using the Sample and hold and Quantizer blocks....

15p longtuyenthon 27-01-2010 159 61   Download

Overview In order to more efficiently transmit or store high-quality audio signals, it is often desirable to reduce the amount of information required to represent them. In the case of digital audio signals, the amount of binary information needed to accurately reproduce the original pulse code modulation (PCM) samples may be reduced by applying

23p longmontran 18-01-2010 95 16   Download

Some bandpass modulation schemes -M-PAM, M-PSK, M-FSK, M-QAM -How to perform coherent and non-coherent detection -How to calculate the average probability of symbol error for different modulation schemes that we studied?

25p huemanvdoc 23-11-2009 127 29   Download

Another source of error due to filtering effect of the system: -Inter-symbol interference (ISI) -The techniques to reduce ISI -Pulse shaping to have zero ISI at the sampling time -Equalization to combat the filtering effect of the channel

27p huemanvdoc 23-11-2009 88 6   Download

Transforming the information source to a form compatible with a digital system -Sampling -Aliasing -Quantization -Uniform and non-uniform -Baseband modulation -Binary pulse modulation -M-ary pulse modulation -M-PAM (M-ay Pulse amplitude modulation)

22p huemanvdoc 23-11-2009 126 18   Download