Method of and Device for Coding a Video Image Sequence in Coefficients of Sub-Bands of Different Spatial Resolutions

Method of decoding a data stream obtained by temporal filtering and discrete wavelet decomposition, the data stream including at least one restitution level, comprising coefficients of frequency sub-bands having a spatial resolution equal to a spatial resolution of the restitution level, the method comprises the steps of:

• obtaining, in at least one restitution level, coefficients of frequency sub-bands with a spatial resolution higher than the spatial resolution or resolutions of the restitution level, and
• synthesizing the coefficients of frequency sub-bands having a spatial resolution equal to a spatial resolution of the restitution level and coefficients of frequency sub-bands with a spatial resolution higher than the spatial resolution or resolutions of the restitution level.

Device for coding a video image sequence in coefficients of frequency sub-bands with different spatial resolutions, the coding device including a processor arrangement arranged to be responsive to the video image sequence for:

• forming at least one data stream including at least one restitution level comprising coefficients of frequency sub-bands having spatial resolution equal to a spatial resolution of the restitution level, and
• inserting in at least one restitution level coefficients of frequency sub-bands with a spatial resolution higher than the spatial resolution or resolutions of the at least one restitution level.

Device for decoding a data stream obtained by temporal filtering and discrete wavelet decomposition, the data stream including at least one restitution level comprising coefficients of frequency sub-bands having spatial resolution equal to a spatial resolution of the restitution level, the device including a processor arrangement for:

• obtaining, in at least one restitution level, coefficients of frequency sub-bands having a spatial resolution higher than the spatial resolution or resolutions of the restitution level, and
• synthesising coefficients of frequency sub-bands having spatial resolution equal to a spatial resolution of the restitution level and coefficients of frequency sub-bands with a spatial resolution higher than the spatial resolution or resolutions of the restitution level.

Signal comprising a video image sequence coded in coefficients of frequency sub-bands with different spatial resolutions, the signal forming at least one data stream including at least one restitution level comprising oefficients of frequency sub-bands having spatial resolution equal to a spatial resolution of the restitution level, the signal comprising, in at least one resolution level, coefficients of frequency sub-bands with a spatial resolution higher than the spatial resolution or resolutions of the at least one restitution level.

Method of transmitting a signal comprising a video image sequence coded in coefficients of frequency sub-bands with different spatial resolutions, the signal forming at least one data stream including at least one restitution level comprising coefficients of frequency sub-bands having spatial resolution equal to a spatial resolution of the restitution level, and in which the signal comprises, in at least one restitution level, coefficients of frequency sub-bands having a spatial resolution higher than the spatial resolution or resolutions of the at least one restitution level.

Method of storing a signal comprising a video image sequence coded in coefficients of frequency sub-bands with different spatial resolutions, the signal forming at least one data stream including at least one restitution level comprising coefficients of frequency sub-bands having spatial resolution equal to a spatial resolution of the restitution level, and in which the signal comprises, in at least one restitution level, coefficients of frequency sub-bands having a spatial resolution higher than the spatial resolution or resolutions of the at least one restitution level.