joint stereo or stereo in tmpgenc whats the difference

[zdog]

just wanted to know what the difference and which on is better.

[Greg12]

i believe that joint stero compares the differences between the streams and theirfore the audio becomes a lil smaller.

[zdog]

<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR size=1 color=black></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>
On 2001-10-07 19:48:35, zdog wrote:
just wanted to know what the difference and which on is better.
</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>but which on is better

[Jeomite]

(True) Stereo is better.
But the file size is *a little bit* larger compared to Joint Stereo. I recommend sticking to (True) Stereo.

[vitualis]

There is no simple answer to this. It also depends on the bitrate you are using...

Joint stereo is relatively more efficient in bitrate allocation that ordinary stereo as it takes advantage of the redundancy between the left and right channel. Thus, at a lower bitrate (e.g., 128 kbps for MP3 and presumable MP2) joint stereo encoded audio will sound better than a standard stereo encoded audio.

However, as the bitrate becomes higher, this factor becomes increasing less and less important. Furthermore, using joint stereo can actually introduce audio artifacts -- but to what degree depends on the encoder. There is also some loss of stereo separation. Thus, at higher bitrates (e.g., 256 kbit/s for MP3 and ?224kbit/s for MP2) standard stereo may offer better quality.

Also, I'm not entirely sure if VCD2.0 supports joint stereo encoded audio for the video tracks... Thus, I woulds stick to standard stereo.

Regards.

[wildcatfan]

Technically VCD 2.0 doesn't support joint stereo i don't think but you will probably not find a player that will not play it. By the way joint stereo doesn't really make the file smaller it just makes it sound better for the same filesize. After all 128kbps is 128kbps no matter what encoding scheme....for what it's worth I use Joint stereo on all of my soundtracks which must dip below 192kbps. There is a slight loss of stereo separation (worse at bitrates below 160 from what i have noticed) but I haven't noticed any ill effects in Dolby PL mode....