Patent ID: 7463777
Filing Date: 2008-12-09
Classification: H04N

Abstract:
1. A computer-implemented method for scaling down a number of data samples by a factor of B, wherein B>2, the method comprising: receiving more than two blocks of quantized transformed data samples, the more than two blocks of quantized transformed data samples representing more than two blocks of original data samples; generating at least two tables of constants, wherein each table of constants is capable of reducing the number of quantized transformed data samples by a different factor of B, wherein each table of constants is generated by: selecting one of at least two tables of constants; dequantizing the quantized transformed data samples; and applying the constants taken from the selected table to more than two blocks of dequantized transformed data samples to produce one block of transformed data samples representing one block of final data samples, wherein applying the constants further comprises applying the constants to a set of B adjacent blocks of dequantized transformed data samples to produce for each set of B adjacent blocks a single block of transformed data samples representing a single block of final data samples.