Title:
【発明の名称】ビデオシーケンスの圧縮のための符号化方法
Document Type and Number:
Japanese Patent JP2003533102
Kind Code:
A
Abstract:
The invention relates to an encoding method for the compression of a video sequence by means of a tridimensional wavelet transform. This method is based on a hierarchical subband encoding process leading to transform coefficients constituting a hierarchical pyramid. A spatio-temporal orientation tree, in which the roots are formed with the pixels of the approximation subband and the offspring of each of these pixels is formed with the pixels of the higher subbands, defines the spatio-temporal relationship inside said pyramid. According to the invention, the initial subband structure of the wavelet transform is preserved, in the encoding process, by scanning the subbands one after the other in an order that respects the parent-offspring dependencies formed in the tree. Moreover, flags "off/on" are added to each coefficient of the tree in view of a progressive transmission of the most significant bits of the coefficients, at least one of them describing the state of a set of pixels and at least another one describing the state of a single pixel.
Inventors:
Felts, Boli
Venetier, Marion
Pesque-Popescue, Beatrice
Venetier, Marion
Pesque-Popescue, Beatrice
Application Number:
JP2001581543A
Publication Date:
November 05, 2003
Filing Date:
April 17, 2001
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
H03M7/30; H04N19/36; H04N19/46; H04N19/62; H04N19/64; (IPC1-7): H04N7/30
Attorney, Agent or Firm:
Tadahiko Ito