Patent ID: 8363718
Filing Date: 2013-01-29
Classification: H04N

Abstract:
1. A method to correct a quantized data value generated by a first quantization of an input data value, followed by a first inverse quantization and subsequently by a second quantization, where the first quantization has first quantization intervals and first reconstruction values and the second quantization has second quantization intervals, second reconstruction values and a second inverse quantization, comprising: generating, using a processor, third quantization intervals by shifting interval boundaries of each of the second quantization intervals to nearest-located interval boundaries of the first quantization intervals; establishing a third reconstruction value for and within each of the third quantization intervals; generating, a corrected data value by a third inverse quantization of the quantized data value, based on the third quantization intervals and each third reconstruction value associated therewith; and transcoding a digital signal using the corrected data value.