# Voice transmission

**URL:** <https://www.ruby-forum.com/t/voice-transmission/232068>\
**Category:** GNU Radio\
**Created:** [September 16, 2014, 6:38pm UTC](https://www.ruby-forum.com/t/voice-transmission/232068 "2014-09-16T18:38:26Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [September 16, 2014, 6:38pm UTC](https://www.ruby-forum.com/t/voice-transmission/232068/1 "2014-09-16T18:38:26Z")

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Good evening,  
I have a question: which are the blocks of a voice transmitter based on  
DQPSK mod?

Audio source-\>packet encoder-\>DPSK MOD -\>UHD: USRP Sink

I need a voice encoder and encrypt or the above scheme is correct?

Thank you!