# US 2008/0187045 A1 · Method for Hierarchically Coding Video Images > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0187045 A1 - Document ID: US20080187045A1 - Status: Published application - Kind: A1 - Application number: 11/665,884 - Filed: 2005-10-11 - Published: 2008-08-07 - Earliest claimed: 2004-10-20 - Assignees: Thomson Licensing - Inventors: Gwenaelle Marquant; Edouard Francois; Jérôme Vieron - Web page: https://patentgrep.com/patent/US20080187045A1 ## CPC - H04N 19/59: involving spatial sub-sampling or interpolation, e.g. alteration of picture size or resolution - H04N 19/593: involving spatial prediction techniques - H04N 19/63: using sub-band based transform, e.g. wavelets - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract The picture and coding method comprises the following steps: coding of the lowest resolution picture to provide coded data for a base layer of the coded data flow, zoom of the picture to obtain a low resolution zoomed picture of dimensions of those of the picture for the common video part, coding of to supply coded data to an upper layer of the coded data flow and using at least one of the following modes: predictive inter layer coding using a previous low resolution zoomed picture in which a predicted block and a motion vector defining this block is determined, predictive inter layer coding using a current low resolution zoomed picture in which a predicted block and a motion vector defining this block is determined. ## Claims ### Claim 1 Hierarchical coding method of different non-proportional formats to give a flow of coded data, a first picture in format F1 and a second picture in format F2 of a lower resolution to the first format F1, the video content of the images and having at least one common part, wherein it implements the following steps: coding of the picture to provide coded data for a base layer of the coded data flow, zoom of the picture to obtain a low resolution zoomed picture of dimensions those of the picture for the common video part, coding of the high resolution picture for what relates to the image blocks of the non common port, to supply coded data to an upper layer of the coded data flow by using at least one of the following modes: predictive inter layer coding using a previous low resolution zoomed picture in which a predicted block and a motion vector defining this block is determined, predictive inter layer coding using a current low resolution zoomed picture in which a predicted block and a motion vector defining this block is determined, ### Claim 2 (depends on 1) Method according to claim 1, wherein the high resolution is realised according to the following steps: coding of the picture zone to the common video content to supply a picture of residues relating to the prediction picture, decoding this zone to provide a reconstructed common zone, coding the non-common part using at least the inter-spatial coding mode consisting in using the reconstructed common mode as prediction picture to determine a predicted block. ### Claim 3 (depends on 1) Method according to claim 1, wherein the picture used for the zoom is a reconstructed picture obtained by the local decoding of the coded picture. ### Claim 4 (depends on 1) Method according to claim 1, wherein the inter-layer predictive coding comprises a sub-mode in which the predicted macroblock is the macroblock being located at the same place as the macroblock to code. ### Claim 5 (depends on 1) Method according to claim 1, wherein the zoom consists in an oversampling and filtering of the picture. ### Claim 6 (depends on 1) Method according to claim 1, wherein the video images are subband pictures obtained by temporal decomposition of the wavelet type or subband coding of the source pictures. ### Claim 7 Method for decoding a flow of digital data structured into at least one base layer comprising data relative to a low resolution image and an upper layer comprising data relating to a high resolution picture, the low resolution picture corresponding to at least a video part of the high resolution picture comprising the following steps: extraction of data from the base layer relating to the low resolution picture and decoding the low resolution picture, zoom of the decoded picture to provide a zoomed picture, extraction and decoding of data from the upper layer for what relates to the image blocks of the non common port, implementing at least one of the following decoding modes: inter-layer predictive mode using a block in the previous low resolution picture decoded and zoomed designated by a motion vector, inter-layer predictive mode using a block in the current low resolution picture decoded and zoomed, designated by a motion vector. ### Claim 8 (depends on 7) Decoding method according claim 7, the upper layer being constituted of coded data corresponding to a residues picture relating to a prediction picture for the common part to the low resolution picture and coded data corresponding to an edge picture relating to the non-common part, wherein, during the decoding of the high resolution picture, the common part of the low resolution picture is first decoded from the residues picture and the zoomed picture and wherein the edge picture is then decoded by implementing at least one inter-spatial mode using the blocks of the said common decoded part determined by motion vectors.