Patent ID: 7275036

Claim:
An apparatus for coding a time-discrete audio signal to obtain coded audio data, comprising: a quantizer for providing a quantization block of spectral values of the time-discrete audio signal quantized using a psychoacoustic model; an inverse quantizer for inversely quantizing the quantization block and for rounding the inversely quantized spectral values to obtain a rounding block of rounded inversely quantized spectral values; a generator for generating an integer block of integer spectral values using an integer transform algorithm formed to generate the integer block of spectral values from a block of integer time-discrete samples; a combiner for forming a difference block depending on a spectral value-wise difference between the rounding block and the integer block, to obtain a difference block with difference spectral values; and a processor for processing the quantization block and the difference block to generate coded audio data including information on the quantization block and information on the difference block.