Hydrogenaudio Forums > Highest possible bitrate

kockroach

Oct 4 2006, 17:08

Hi,

I have been trying to find this out, hoping that there was a comparison table, but couldn't find anything.

What are the highest bitrates possible for OGG Vorbis, MP3 (320, correct?), MPC, AAC and WMA?

I am wanting this for a calculation...has nothing to do with actual encodings I am trying to do.

Thanks!

benski

Oct 4 2006, 17:52

QUOTE(kockroach @ Oct 4 2006, 19:08)

Hi,

I have been trying to find this out, hoping that there was a comparison table, but couldn't find anything.

What are the highest bitrates possible for OGG Vorbis, MP3 (320, correct?), MPC, AAC and WMA?

I am wanting this for a calculation...has nothing to do with actual encodings I am trying to do.

Thanks!

Both AAC and MP3, in theory, have no maximum bitrate. I assume Vorbis is the same, but I'm not a vorbis expert.

MP3 can only accomplish this through so-called "free format" bitrates. Very few players support this, and those that do typically only support up to 384kbps (or so I've heard).

AAC decoders tend to be more standards-compliant and will typically play back any bitrate.

WMA Standard is realistically limited to 320kbps (VBR might go higher, but not sure). WMA Pro can go much higher, especially with 6 channel and/or 96kHz.

Since MPC is based on MPEG-1 Layer 2, I would assume a maximum bitrate of 384, but I'm not sure. edit: Wikipedia claims max of 1300kbps

grommet

Oct 4 2006, 18:11

Slight correction: MP3 has a maximum bitrate of 320kbps... beyond that, it's CBR only "free format" & non-standard.

Yes, WMA Standard VBR can exceed 320Kbps (especially in the VBR bloat-bugged WMA 9.1 release).

kockroach

Oct 4 2006, 18:12

Thanks benski. Your mention of Wikipedia helped me. (Don't know why I didn't think of looking there....I thought that if any place would have it, it would be HA's wiki.)

I managed to find this page, which has a somewhat complete table.

In short, based on what I could find, WMA is 768 kbps, AAC is 529 kbps, OGG Vorbis seems to be 500 kbps, MPC is 1300 kbps, and of course MP3 is 320 kbps. If anyone finds otherwise, it would be good to know.

Gabriel

Oct 5 2006, 02:45

Mp3 has no maximum bitrate, but compliant decoders are only required to decode up to 320kbps.
Higher bitrates than 320kbps, when in free format mode, ARE compliant to the standard.

kjoonlee

Oct 5 2006, 02:50

QUOTE(kockroach @ Oct 5 2006, 09:12)

In short, based on what I could find, WMA is 768 kbps, AAC is 529 kbps, OGG Vorbis seems to be 500 kbps, MPC is 1300 kbps, and of course MP3 is 320 kbps. If anyone finds otherwise, it would be good to know.

500 was the nominal bitrate for -q 10 with 44.1kHz stereo. Actual bitrate can go higher than that.

Jillian

Oct 5 2006, 03:16

Highest WMA Profile is 768kbps. It can variable up to 20mbps when use peak bitrate.
But I write about that in Wikipedia because I don't want anyboby to know WMA bit rate can be higher than 768kbps (and it's make no sense, I think)

...Just Elliott

Oct 5 2006, 04:34

QUOTE(Jillian @ Oct 5 2006, 10:16)

Highest WMA Profile is 768kbps. It can variable up to 20mbps when use peak bitrate.
But I write about that in Wikipedia because I don't want anyboby to know WMA bit rate can be higher than 768kbps (and it's make no sense, I think)

Yes, it's top secret information!

guruboolez

Oct 5 2006, 04:50

For musepack:

QUOTE

What are the minimum and the maximum bitrates supported by mp+/mpc?

The encoder can theoretically use bitrates up to 1.32 MBit/sec. Normally such high bitrate will not occure. The minimum bitrate is used for zero-samples and will reach about 3.4 kbit/s.

(Source)