Decoding, on the other hand, is carefully defined in the standard. Most decoders are "bitstream compliant", which means that the decompressed output that they produce from a given MP3 file will be the same, within a specified degree of rounding tolerance, as the output specified mathematically in the ISO/IEC high standard document (ISO/IEC 11172-3). Therefore, comparison of decoders is usually based on how computationally efficient they are (i.e., how much memory or CPU time they use in the decoding process).
আইএসও/আইইসি হাই স্ট্যান্ডার্ড ডকুমেন্ট বলে যে প্রদত্ত এমপি ৩ ফাইল থেকে উত্পাদিত ডিকম্প্রেসড আউটপুট কোন মানের মধ্যে একই হবে?
specified degree of rounding tolerance