Invention Application
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
- Patent Title: LOCALLY VARIABLE QUANTIZATION AND HYBRID VARIABLE LENGTH CODING FOR IMAGE AND VIDEO COMPRESSION
- Patent Title (中): 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
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Application No.: US12574409Application Date: 2009-10-06
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Publication No.: US20110080946A1Publication Date: 2011-04-07
- Inventor: Junlin Li , Dihong Tian , Wen-hsiung Chen , Yian Xu
- Applicant: Junlin Li , Dihong Tian , Wen-hsiung Chen , Yian Xu
- Main IPC: H04N11/04
- IPC: H04N11/04

Abstract:
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.
Public/Granted literature
- US08340448B2 Locally variable quantization and hybrid variable length coding for image and video compression Public/Granted day:2012-12-25
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