发明申请
US20110080946A1 LOCALLY VARIABLE QUANTIZATION AND HYBRID VARIABLE LENGTH CODING FOR IMAGE AND VIDEO COMPRESSION 有权
用于图像和视频压缩的局部可变量化和混合可变长度编码

LOCALLY VARIABLE QUANTIZATION AND HYBRID VARIABLE LENGTH CODING FOR IMAGE AND VIDEO COMPRESSION
摘要:
A coding method, apparatus, and storage media with instructions to carry out a method. The method operates on an ordered series of transform coefficients of a block of image data, and for a fixed quantization method, and includes quantizing and encoding the ordered series to form a coded bitstream. The quantizing and encoding uses one or more variable length code (VLC) mappings. The quantizing includes quantizing to have amplitude-1 at least one coefficient that would be quantized by the fixed quantization method to have zero amplitude, quantizing to have zero amplitude at least one coefficient that would be quantized by the fixed quantization method to have amplitude-1, and using the fixed quantization method to quantize any coefficient that is quantized by the fixed quantization method not to have zero amplitude, amplitude-1, or amplitude-2.
信息查询
0/0