[Ffmpeg-devel] [PATCH] Vorbis decoder
Thu May 12 18:26:36 CEST 2005
Balatoni Denes wrote:
> It is a somewhat twisted idea that a perceptual audio codec with 16 bits
> precission would need so many bits. In the case of Vorbis the spec. allows 48
> bits of precision, and in fact tremor uses an optimized floating point
> implementation (the idea: many numbers share the same exponent). In practice
> however (looking at the current encoder) 32 bits are more than enough for the
> decoder, but this could change.
I fail to remember which step in the decoding recipe mentions it (dot
product?), but I know that the Vorbis decoder spec notes that the
product of one particular multiplication can overflow a 32-bit variable.
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