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  • Xiph.Org
  • VorbisVorbis
  • Issues
  • #257

Closed
Open
Opened Oct 05, 2002 by tgirmann@tgirmann

OggEnc gives bad quality with synthetic speech

Ogg Vorbis introduces lots of noise into the voice. The problem is easy to hear
at -q 3 and -q 5; at -q 7 it sounds almost okay; here the biggest problem (easy
to hear in direct comparison) is that the heights got a bit louder.

I've tried other encoders too; at the same bit rates MP3 (LAME version 3.92 MMX)
suffers from similar problems but it sounds better (when using vbr) while
Musepack sounds almost perfectly.

(side note: when forcing LAME to 128 kbit/s the quality is really bad)

As I selected quality I want oggenc to allocate enough bits to achieve the
desired quality.

See attachment for reverence WAV and Ogg Vorbis examples.


(Yes I'm using OggEnc v1.0 (libvorbis 1.0))
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Reference: xiph/vorbis#257