voice compression

[prashantece]

I am working on UDP voice sender/rec and used it on network it is working good but i want to reduce bandwidth (present BW: 180 kbps meseared on wireshark) over channel to 32/64 kbps. please help me to do it.

[GerdW]

Hi prashantece,

at which university are you studying?

What kind of help do you need?

- When you want to have a programming job done you may advertize it in the "job offerings" forum.

- When you need help on specific problems you should attach your VI and pin-point the problem, some good example data preferred…

- When you need general ideas on your question topic you may read a good book or look up Wikipedia! You may look for abbreviations like FLAC, MP3, OPUS, AAC, CELT, SILK…

[Yamaeda]

You can ofcourse change sampling parameters to 8-bit and 11kHz sampling, you can zip the stream before sending it, or use some compressed sound format. What are you doing now?

/Y

[prashantece]

here i attched my vi 
nd i want to make a voice transmission system using udp protocol.

[prashantece]

at the given combination (8bit and 11k) there is very poor quality of audio(like donald duck) is coming so any other idea.....

regards

[Yamaeda]

Is it meant for spoken word or music? 8bit 11 khz is slightly better then a cell phone.

[Yamaeda]

If it is speak, you only need mono.

[GerdW]

Hi prasha,

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present BW: 180 kbps meseared on wireshark over channel to 32/64 kbps

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 Well, right now you need a BW of [stereo, 16bit, 11,025kHz] 2×11025×8 = 176,4kbps.

To reach your goal of 48kbps you should use [mono, 8bit, 6000Hz] settings: 1×6000×8=48kbps.

When it comes to "listening quality" (which is not mentioned in your first post!) you really should read literature on the abbrevations mentioned above…

[Yamaeda]

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@prashantece wrote:

at the given combination (8bit and 11k) there is very poor quality of audio(like donald duck) is coming so any other idea.....

regards

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In the VI you posted you're using the wrong output from the grab sound.

[William1225]

Hi, prashantece,

Do you want just to resample your voice data?