[vorbis-dev] When can we expect low bitrate encoding?

Monty xiphmont at xiph.org
Fri Dec 8 14:17:29 PST 2000

On Fri, Dec 08, 2000 at 10:28:37AM -0500, MC Spanky wrote:
> Just curious, our project was hoping to use 56k coding for a mono sound,
> and maybe even 36 or 28k if they sound good enough.  Right now, the
> smallest rate for a mono source is 64k.

Oggenc just doesn't know how to lowpass or downsample; if you feed it
an input source that's lower than 44.1kHz, it will Do The Right Thing
(tm); 11kHz inputs currently compress down to as low as 16kbit/s.

That said, the encoder modes are not yet well tuned for lower sampling
rates; specifically, the preecho handling doesn't yet scale down so
preecho will be slightly more annoying at 22kHz, and fairly pronounced
at 11kHz sampling rates.  That, obviously, will be corrected in the
not too distant future.


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