Intervideo, Inc.

Chung-Tao Chu

Wei Ey Li

Andy Chao Hung

Wei Ding

A method for enhancing video or other multimedia in order to achieve a closer-to-movie theater viewing experience. The enhancement method can be applied to YUV or other video formats which are used for TV or digital media. The method provides a curve with at least one inflection point such that at least one region has a concave upward arc and another region has a concave downward arc. The improved curve provides relatively less contrast in relatively dark regions and relatively more contrast in relatively bright regions. By taking into account the visual sensitivity to various luminance levels, a neutral point is selected to be located at a relatively dark point. To the darker side of the neutral point, luminance is suppressed. To the brighter side of the neutral point, luminance is enhanced. This luminance-mapping curve is applied to the luminance (Y) signal so as to enhance both brightness and contrast.

Movie enhancement

A system for improving the speed of the video encoding process by decreasing the number of cycles to perform the quantization. The disclosed system achieves the improvement through use of parallel processor such as one having a Single Instruction, Multiple Data (SIMD) architecture. Concurrent processing during one instruction cycle is accomplished, thereby leading overall to the use of fewer instruction cycles. In the preferred embodiment, an MMX instruction set is used for executing four quantization in parallel. The disclosed system also achieves a higher precision of the quantization during the encoding of video signals with the SIMD architecture by using a larger multiplier and larger shift factor.

Growing community of inventors

San Jose, CA, United States of America

Chung-Tao Chu