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[Question] Quantization step size for DCT coefficients

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12-07-2006, 07:52 AM

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[Question] Quantization step size for DCT coefficients

Hi,

In any standard implementation of DCT, the DCT coefficients are
quantized using Quantization Coefficients included in the JPEG file
stream.

Here where is the Quantization step size ? Do they vary in MPEG files

Is it 2^(M-1) ? Is it M = 10. for JPEG files

James Colin

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