On Sep 21, 2004, at 9:11 PM, Grigory A. wrote:

Could someone give me answer : are mp3 frames independent? I mean how current frame depend from previous?

It looks like points of dependences are in

• overlap procedure
• synthesis procedure

In addition to these, MP3 frames are also interdependent in the way they share the bit reservoir. What this means is that the audio data for a Layer III frame is not necessarily contained entirely between sync words; some or all of the associated audio data may be stored in the free space of the preceding frames.

so if I skip correctly one or more frames - all "problems" will disappear after first newly decoded frame. I mean - first frame decoded after skipped - will be wrong (if compare with non-skipped sequence)and second become same in both cases?

If the frame you decode after skipping depends on the bit reservoir, you may not even be able to decode it. You may have to decode several frames before the bit reservoir is fully refilled.

There has been much discussion on the subject of seeking; you may want to review:

http://www.mars.org/mailman/public/mad-dev/2001-August/000321.html http://www.mars.org/mailman/public/mad-dev/2001-August/000338.html http://www.mars.org/mailman/public/mad-dev/2003-November/000949.html