Hi, Is there any difference between decoding of CBR or VBR streams in realtime in terms of CPU usage/cost? Are sample rates other than 44100Hz supported by Vorbis officially ? If it is supported, is it efficient to use them or is Vorbis specifically (or at the moment) optimized for 44100Hz ? Thanks in advance. --- Mete BALCI Senior Game Programmer Momentum DMT Istanbul, TURKEY -------------------------------------------------------------------------- Confidentiality Notice: This e-mail may contain confidential and/or privileged information that is intended only for the individual or entity named in the e-mail address. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or taking of any action in reliance upon the contents of this e-mail is prohibited. If you have received this e-mail in error, please contact the sender and delete the e-mail from your computer. Thank you. <p><p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
Michael Smith
2003-Mar-07 01:10 UTC
[vorbis-dev] cbr/vbr decoding - supported sample rates
On Friday 07 March 2003 20:07, Mete BALCI wrote:> Hi, > > Is there any difference between decoding of CBR or VBR streams in realtime > in terms of CPU usage/cost? >No. Encoding CBR is much slower than encoding VBR, but decoding is the same (probably not quite identical, but close enough that you'd be very hard pressed to tell the difference...)> Are sample rates other than 44100Hz supported by Vorbis officially ? If it > is supported, is it efficient to use them or is Vorbis specifically (or at > the moment) optimized for 44100Hz ? >Yes, other sample rates are officially supported. 44.1 kHz is the best tuned sample rate (this is not to say others are bad - but obviously 44.1 kHz gets a lot more use than others, so it will tend to be marginally better), but if you're trying for lower bitrates lower sample rate helps a fair bit. If you want to do 48 kHz instead, that's close enough to 44.1 kHz that it'll make little difference to the encoder. Mike <p><p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.