A method and apparatus for quantizing audio signals is disclosed which advantageously produces a quantized audio signal which can be encoded within an acceptable range. Advantageously, the quantizer uses a scale factor which is interpolated between a threshold based on the calculated threshold of hearing...http://www.google.de/patents/USRE40280?utm_source=gb-gplus-sharePatent USRE40280 - Rate loop processor for perceptual encoder/decoder