Invention Grant
US06631213B1 Methods and devices for coding and decoding digital signals, and systems using them
失效
用于对数字信号进行编码和解码的方法和装置，以及使用它们的系统
- Patent Title: Methods and devices for coding and decoding digital signals, and systems using them
- Patent Title (中): 用于对数字信号进行编码和解码的方法和装置，以及使用它们的系统
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Application No.: US09539700Application Date: 2000-03-31
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Publication No.: US06631213B1Publication Date: 2003-10-07
- Inventor: Isabelle Amonou , Félix Henry
- Applicant: Isabelle Amonou , Félix Henry
- Priority: FR9904403 19990408
- Main IPC: G06K936
- IPC: G06K936
Abstract:
In order to code a digital signal, a simplified version of the digital signal is determined, containing only some of the information contained in the digital signal. The simplified version is coded by means of a predetermined single coding technique. This simplified version is subtracted from the digital signal, so as to obtain a residual signal. From each block of the simplified version, there is selected, for each corresponding block of the residual signal, a coding technique amongst a predetermined number M of coding techniques Ci, where i is an integer between 1 and M. Each block of the residual signal is coded by means of the previously selected coding technique.
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