bpa;494178 Wrote: > Something strange with the spec because IIRC AACplus spec says it should > not be used over speeds of 128 as at higher speeds AAC gives better > quality/bit. >
There are a lot of names for different variations on the theme of AAC and AAC+ but yes those variations that use Spectral Band Replication (SBR) should only be used for relatively low bit rates since SBR won't perfectly reproduce the top octave of the encoded waveform no matter how high a bitrate is used. Hence AAC without SBR will be better overall at higher bit-rates (over something in the region of 96 to 128kbps for normal near CD quality audio). AAC+ refers to AAC with SBR while AAC is usually AAC without SBR. There are numerous variations and I find it quite hard to work out with use SBR and which do not. For more info start here: http://en.wikipedia.org/wiki/Advanced_Audio_Coding -- BrianG61UK ------------------------------------------------------------------------ BrianG61UK's Profile: http://forums.slimdevices.com/member.php?userid=47963 View this thread: http://forums.slimdevices.com/showthread.php?t=72441 _______________________________________________ Radio mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/radio
