What's Non-Reture-Zero encoding?

[heartfree]

It seem that NRZ encoding result of input bit stream is just like itself.
I am puzzled, how to understand the value of NRZ?
Please explain the other kinds of digital data encoding method.
Thanks of millions.

 

[sss]

It seem that NRZ encoding result of input bit stream is just like itself.

Yes

I am puzzled, how to understand the value of NRZ?
Please explain the other kinds of digital data encoding method.
Thanks of millions.

See
http://www.interfacebus.com/Definitions.html

 

[Hamidzia]

Assalam O Alekum

Digital Data Encoding Techniques can be divided into following

1. Digital Data Analog Signals

ASk,PSK,FSK.

2. Digital Data Digital Signals

NRZ, Manchester etc.

You can have a complete knowledge of all encoding techniques in

DATA AND COMPUTER COMMUNICATIONS
by WILLIAM STALLINGS

Check the attachment might help u .

Thankx

 

[GeekWizard]

It seem that NRZ encoding result of input bit stream is just like itself.

Yes, NRZ-L is exactlty the same. some also (and rightly so) call it as uncoded. Its used to only transmit data over short distances like within one piece of equipment. CLK is send via a separate line.

NRZ-S and NRZ- M are the other ones also known as differential encoding. NRZ-S ouputs inverted bit from the previous one if input is '0'. Its exactly the opposite in case of NRZ - M.

Loads of codes r out there; choice depending mainly upon DC content, timing clk extraction etc.

 

[Regnum]

Here you have other encoding formats
Regards.

 

[bobo2812]

i couldnt find any book of william stallings
any body help me

 

[Kral]

heartfree,
One advantage of NRZ, such as Manchester, is that the average (DC) component of the signal is zero. This means that coupling transformers (which can not pass DC) can be used for purposes such as common mode rejection and (theoretically) lossless impedance matching. The military uses the 1553 bus, which uses Manchester encoding, extensively for these reasons.
Regards,
Kral

Added after 4 minutes:

heartfree,
One thing that I forgot to mention in my previous post is that the many of the NRZ schemes (such as Manchester) ar self-clocking. This means that the clock can be derived from the signal at the receiving end for decoding purposes.
Regards,
Kral.

 

[asnivas]

It seem that NRZ encoding result of input bit stream is just like itself.
I am puzzled, how to understand the value of NRZ?
Please explain the other kinds of digital data encoding method.
Thanks of millions.

Mainly there are 9 different coding techniques

1. NRZ-L
2. NRZ-M
3. NRZ-S
4. BiPhase-L
5. BiPhase-M
6. BiPhase-S
7. DM-S
8. DM-M
9. RZ