Invention Grant
- Patent Title: Method and device for compressing an image signal based upon differential quantization of data
- Patent Title (中): 基于数据的差分量化压缩图像信号的方法和装置
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Application No.: US10251658Application Date: 2002-09-19
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Publication No.: US07286714B2Publication Date: 2007-10-23
- Inventor: Jean-Michel Bard , Jean-Luc Danger , Lucas Hui , Christophe Cunat
- Applicant: Jean-Michel Bard , Jean-Luc Danger , Lucas Hui , Christophe Cunat
- Applicant Address: FR Montrouge FR Paris SG Singapore
- Assignee: STMicroelectronics S.A.,Group des Ecoles des Telecommunications,STMicroelectronics Asia Pacific Pte. Ltd.
- Current Assignee: STMicroelectronics S.A.,Group des Ecoles des Telecommunications,STMicroelectronics Asia Pacific Pte. Ltd.
- Current Assignee Address: FR Montrouge FR Paris SG Singapore
- Agency: Seed IP Law Group PLLC
- Agent Lisa K. Jorgenson; Robert Iannucci
- Priority: FR0112209 20010921
- Main IPC: G06K9/36
- IPC: G06K9/36 ; G06K9/46

Abstract:
Method of compressing a digital image signal in which a first quantization step set, which is unique for a given segment, is determined so that the number of bits needed to encode the quantized data corresponding to this segment is greater than a target value. This first quantization step set then being modified, as a priority, for the blocks of the segment for which the gain, in the course of this modification, on the reduction of the number of bits needed to encode the quantized data corresponding to the segment to which it belongs, is the highest. This modification is carried out, on as many blocks as is necessary for the number of bits of this segment to be less than or equal to the target value. Device to implement this method.
Public/Granted literature
- US20030113025A1 Method and device for compressing an image signal Public/Granted day:2003-06-19
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