Audio bitrate question

[hp78]

This may be a dumb question, anyways...

I recently authored a DVD from an MPEG movie with NeroVision Express 2.

My question is why did the program downsized the original sound bitrate of 224kbps (MPEG 2.0) to 192kbps (Dolby Digital 2.0).

Thanks for the attention.

Hugo

[guns1inger]

Dolby Digital is a more efficient compression algorythm than mpeg1-layer 2 audio. 192kbps is the standard bit rate for two channel AC3 (Dolby Digital)

[hp78]

I see.

The software is re-encoding the audio, but is this procedure lossless?

Regards,

Hugo

[ZippyP.]

The software is re-encoding the audio, but is this procedure lossless?

Re-compression is never, ever lossless especially if the bitrate is being reduced.

[glockjs]

but 192kbps is still high enough your really not going to notice a difference

[Capmaster]

I see.

The software is re-encoding the audio, but is this procedure lossless?

Regards,

Hugo

Losslessness is unnecessary for audio. LPCM is an uncompressed format and 3 hour's worth of LPCM audio will be about 2.2GB in size. But you'll swear the same audio in AC3 sounds better, at 20% of the size and a lower bitrate