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| From | pozz <pozzugno@gmail.com> |
|---|---|
| Newsgroups | comp.arch.embedded |
| Subject | Voice compression |
| Date | 2025-04-02 18:33 +0200 |
| Organization | A noiseless patient Spider |
| Message-ID | <vsjotj$14v21$1@dont-email.me> (permalink) |
I need to manage some audio voice streams. They will be saved on a non volatile memory as raw arrays of unsigned char. The main goal is to play these audio streams through a DAC/PWM. I'm not interested in high quality, a "mid/low" quality could be good. My hardware is a poor AVR8 8-bits MCU. I have a limited memory space, so I'm searching a good voice codec with compression. Lower the bitrate, more streams I can store. 16kbps can be good for my application. Maximum 24kbps. By using 4-bits ADPCM I could have 32kpbs at 8kHz sampling rate. With 3-bits ADPCM I could read 24kbps. I tried to reduce sampling frequency to 4kHz, but the quality is drastically reduced. I know there are many others voice codecs that reduce the bitrate a lot, but the decoder seems too complex to implement on AVR8. Any suggestions?
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Voice compression pozz <pozzugno@gmail.com> - 2025-04-02 18:33 +0200
Re: Voice compression Rafael Deliano <Rafael_Deliano@arcor.de> - 2025-04-02 19:55 +0200
Re: Voice compression pozz <pozzugno@gmail.com> - 2025-04-03 19:53 +0200
Re: Voice compression Rafael Deliano <Rafael_Deliano@arcor.de> - 2025-04-05 11:12 +0200
Re: Voice compression pozz <pozzugno@gmail.com> - 2025-04-07 13:13 +0200
Re: Voice compression Paul Rubin <no.email@nospam.invalid> - 2025-04-04 13:54 -0700
Re: Voice compression pozz <pozzugno@gmail.com> - 2025-04-07 13:09 +0200
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