Shanghai Zhaoxin Semiconductor Co., Ltd.

Glenfly Technology Co., Ltd.

Yongtao Zhao

Wei Wang

Ruiyang Chen

Yuanfeng Wang

Shuoshuo Liu

The disclosure provides a method for image compression and a device using the same method. The method includes: retrieving an image block including pixels, wherein each pixel include a plurality of channel data; defining root nodes according to an image compressing ratio of the image block; categorizing each channel data of each pixel into groups corresponding to the root nodes, wherein a structure of each group is a binary tree; if an empty tree exists in the aforementioned groups, dividing an non-empty tree of the groups into sub-trees and replacing the empty tree and the non-empty tree with the sub-trees to update the groups and the root nodes; building a center value of each group and determining a group index of each channel data of each group; encoding the center value of each group and characterizing each channel data as the corresponding center value and the group index to compress each channel data.

Method for compressing image and device using the same

An image processing method and an image processing device are provided. The method includes: retrieving a first and second blocks and compressing the first and second blocks into a first and second streams; in response to determining performing a dynamic memory allocation mechanism to the first and second blocks, respectively allocating a first and second private storage spaces to the first and second blocks, and allocating a shared storage space shared by the first and second blocks and divided into multiple segments; when the first private storage space is insufficient to store the first stream, using the first private storage space and a first part of the segments to cooperatively store the first stream; when the second private storage space is insufficient to store the second stream, using the second private storage space and a second part of the segments to cooperatively store the second stream.

Image processing method and image processing device

The invention introduces a method for rate control in an MB (macroblock) layer, including: calculating a prediction MAD (Mean Absolute Difference) of a current MB of a current frame according to a real MAD of a previous MB of a previous frame; calculating a real MAD of the current MB of the current frame; performing an adjustment procedure to adjust the prediction MAD of the current MB of the current frame according to the real MAD of the current MB of the current frame to obtain a final MAD of the current MB of the current frame; calculating a quantization parameter of the current MB of the current frame according to the final MAD of the current MB of the current frame; and outputting the quantization parameter of the current MB of the current frame to a quantizer.

Growing community of inventors

Shanghai, China

Yongtao Zhao