Encoding Audio [Archive]

Seraphic-

17th October 2006, 06:35

Hi,

I have audio files that are 187 kb/sec using the PCM format. I would like to know if I should encode them using 320 kb/sec AAC or using 192 kb/sec AAC. I mean is there any reason to go over 192 kb/sec as the source audio is only 187 kb/sec? Or would using 320 kb/sec still offer higher quality? (size doesn't matter)

Thanks

Skelsgard

17th October 2006, 09:53

187 kbps for a PCM file? what properties does it have (freq, number of channels, bitdepth)? It doesn´t sound like a PCM WAV (for example, a 11025 Hz mono 16bits file is 176 kbps).

Cheers.

Seraphic-

17th October 2006, 10:20

Hi,

It's: PCM - 48.000 kHz - 16 Bit - Stereo - 187 kb/sec (audio is part of an and avi video)

check

17th October 2006, 10:57

you're confusing kbytes and kbits :) The PCM has a bitrate of 1.536mbits

Seraphic-

17th October 2006, 10:59

Yes, but I was listing the settings used during the capture. (which is what I listed in post #3)

http://www.seraphicgate.com/1.jpg

Awatef

17th October 2006, 11:24

As check said, the "kb" here means KiloBytes.
1 Byte = 8 bits
48KHz 16-bit Stereo takes 1536 kbit/s or kbps (48000x16x2=1536000).
1536000 divided by 1024 divided by 8 gives us 187,5 KB/s, that's why you got 187kb/sec there.

192kbps should be more than enough for AAC (8:1 compression), 320 is overkill IMHO.