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2.4 Gray Code PowerPoint PPT Presentation


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2.4 Gray Code. Return. Next. In a Gray code only one bit changes between each pair of successive code words. Gray code is a reflected code . It can be defined recursively using the following rules:. 1. A 1-bit Gray code has two code words, 0 and 1.

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2.4 Gray Code

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2 4 gray code

2.4 Gray Code

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  • In a Gray code only one bit changes between each pair of successive code words.

  • Gray code is a reflected code. It can be defined recursively using the following rules:

1. A 1-bit Gray code has two code words, 0 and 1.

2. The first 2n code words of an (n+1)-bit Gray code equal the code words of an n-bit gray code,written in order with a leading 0 appended.


2 4 gray code1

2.4 Gray Code

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3. The last 2n code words of an (n+1)-bit Gray code equal the code words of an n-bit gray code, but written in reverse order with a leading 1 appended.

  • Example: For a 2-bit Gray code, n=1.

2-bit Gray code

1-bit Gray code

00

01

00011110

01

11

10


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2.4 Gray Code

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  • Example: For a 3-bit Gray code, n=2.

3-bit Gray code

00011110

0000

000001011010110111101100

2-bit Gray code

00011110

1111

10110100


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