Getting unexpected MP3 sync words |
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Getting unexpected MP3 sync words |
 Jul 5 2012, 22:34
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#1
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Group: Members Posts: 1 Joined: 5-July 12 Member No.: 101203  |
Hi ... I'm writing a player in Java for Internet radio stations using the Javazoom library to do the MP3 decode. It's all working pretty well apart from a 'hiccup' in the audio every 5 seconds or so. I've traced this down to where the decoder gets MP3 frames with a non-standard syncword i.e. usually it is 0xFFFFF330 but every 5 seconds I see a frame with the top byte set to something different e.g. sync word 0x9EFFF330, 0xCDFFF330 etc. I searched high and low on Google to see whether sync words other than 11 leading 1's mean anything specific but I can't find anything relevant.
Can anyone offer an explanation for these strange sync words please ? Thanks Ron |
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Jul 5 2012, 22:55
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#2
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 Group: Members Posts: 1559 Joined: 24-June 02 From: Catalunya(Spain) Member No.: 2383 |
Radio stations usually send the name of the song currently playing each x seconds. I don't know if that might be what you're receiving. Do you see anything resembling text after that sync word?
I don't have information about that, but maybe looking about shoutcast and streaming might help. |
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Lo-Fi Version | Time is now: 22nd May 2013 - 14:43 |
