Pcm paper
A discrete source power generation information that we can think of is a symbol. It will choose one after another.

Symbols according to a certain probability will depend on, in general, the previous selection and the

The problem of special symbols. A physical system, or a mathematical model, is produced by a system

As we all know, the symbols of this sequence consist of a group. As a stochastic process, we can

Consider a discrete source, so send a random process. On the other hand, any random

The symbol selection of discrete sequences generated in this process can be regarded as discretization in a finite set.

Source. This will include the following:

1 。 Natural languages, such as English, German and Chinese.

2 。 A quantitative process in which a continuous information source becomes discontinuous. for

For example, quantized speech comes from a Chinese patent medicine transmitter, or quantized TV signals.

3 。 In the case of mathematics, we just define a random process abstractly, which will produce a sequence.

A symbol of. The following are examples of such sources last year.

(a) Suppose we have five letters A, B, C, D, e-commerce, which is the probability of each choice. 2. Successive.

Choose independence. This will lead to a sequence in which the following is a typical one.

For example.

bdcbcecccadbddaaecee 1

Abbdaeecaceebaeecbcea IV

This is a table established and used, random number.