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Topic: Audio transcoding (Read 3731 times) previous topic - next topic
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Audio transcoding

Hello everybody, ok can you help me, i need to be able to identify audio that has been transcoded from a lower to a higher bitrate, and from one format to another, is this possible?? thanks.............

Audio transcoding

Reply #1 –
You can spot low to high bitrate conversions via spectral analysis, however its not a fullproof method. For example, if you have a high-bitrate audio file that shows a frequency cut at 14khz its most likely a transencode from a lower format - OR it is not a transencode, just compressed with a horrible horrible codec.

Audio transcoding

Reply #2 –
Quote
You can spot low to high bitrate conversions via spectral analysis, however its not a fullproof method. For example, if you have a high-bitrate audio file that shows a frequency cut at 14khz its most likely a transencode from a lower format - OR it is not a transencode, just compressed with a horrible horrible codec.
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Audio transcoding

Reply #3 –
Usually you can hear it. At least if your ear is trained.
 

Audio transcoding

Reply #4 –
If you listen very easily annoying flanging effects (mainly in the cymbals or guitars) in 256 or 320 kbps mp3 files, as also in high VBR bitrate files (around 200 kbps); then, is very possible that these files are transcode from a low bitrate files.