JPEG IMAGE COMPRESSION METHOD AND SYSTEM, DEVICE, AND STORAGE MEDIUM

WIPO Patent Application WO/2023/246047

A1

The present application provides a JPEG image compression method and system, a device, and a storage medium. The method comprises: in response to a current image frame being at the position of a starting frame, encoding the current image by using a standard quantization coefficient table; in response to the current image frame being not at the position of the starting frame, calculating a weighted average image data length of a first predetermined number of adjacent frames, and calculating an encoding factor according to the weighted average image data length; predicting a bandwidth factor of the next frame according to the change of bandwidths of a second predetermined number of adjacent frames; and determining a quantization parameter of the current image frame according to the relationship between the encoding factor and the bandwidth factor and by means of a quantization table, and updating the quantization parameter to a quantization table corresponding to the next frame. According to the present application, when a system bandwidth and image characteristics change, the encoding process is optimized frame by frame, so that an encoded image always has highest image quality allowed.

SUN XU (CN)
ZHOU YULONG (CN)
LIU GANG (CN)
LI TUO (CN)

PCT/CN2022/141668

December 28, 2023

December 23, 2022

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SUZHOU METABRAIN INTELLIGENT TECH CO LTD (CN)

H04N19/124

CN114786011A	2022-07-22
CN1857001A	2006-11-01
CN113766226A	2021-12-07
CN1285691A	2001-02-28
CN110381315A	2019-10-25
US6982762B1	2006-01-03
US5115309A	1992-05-19

BEIJING RUN ZEHENG INTELLECTUAL PROPERTY LAW FIRM (CN)

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