Patent ID: 8379715
Filing Date: 2013-02-19
Classification: H04N

Abstract:
1. A method for video compression, the method comprising: performing differential coding on blocks of video data using non-linear quantization and modular arithmetic computation; and generating a codeword from a result of performing the differential coding, wherein performing the differential coding comprises calculating a difference between a first block of video data and a second block of video data, performing modular arithmetic computation on the difference between the first and second blocks of video data to generate a processed difference, comparing the processed difference with a non-linear table of quantization values, and selecting a quantization value that is closest to the processed difference among the quantization values in the non-linear table, wherein selecting the quantization value comprises selecting a first quantization value that is closest to the processed difference among quantization values that are larger than or equal to the processed difference, selecting a second quantization value that is closest to the processed difference among quantization values that are smaller than the processed difference, and selecting one of the first and second quantization values, wherein the selected quantization value is closer to the processed difference than the other quantization value of the first and second quantization values.