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RE: Here's something that not many people know ...

If you PM me, I can try and retrieve the email exchange between myself and the author.

From memory however, the decoder works by scanning the bitstream looking for HDCD packets, then decodes the peak expansion flag. If peak expansion is turned on, then all samples above a certain value get expanded via a lookup table. By feeding the Microsoft HDCD decoder with a doctored set of samples, the lookup table can be easily reconstructed. Further tests were then done to compare between the two decoders to ensure they were bit identical with respect to each other.

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  • RE: Here's something that not many people know ... - Christine Tham 20:31:25 08/17/09 (0)
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