On 02/08/2012 09:02 AM, David Rowe wrote: > Hi Bruce, > > Good question. > > I am not sure what's required to make very high pitched voices (such as > children) more intelligible through codecs. Having said that I know my > 6 year old can be hard to understand through a mobile. A child should sound fine through any modern cellular codec. Some of the early ones, like the VSELP for IS54, sounded really watery on high pitched voices, due to the lack of fractional pitch estimation. > The current frequency range is adequate for all speakers I have heard > processed through Codec 2. It's pretty consistent with every other > codec that I can think of. > You really want to hear a range of Cantonese voices to see how well pitch is handled.
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