Patent ID: 6757450
Filing Date: 2004-06-29
Classification: H04L,H04N

Abstract:
A method of transferring image data between an image data source and image data sink, comprising the steps of:receiving a request at the image data source to push image data to the image data sink; writing transfer control information to a negotiation field by the image data source, wherein the transfer control information includes transfer control parameters having dimension parameters and transfer control flags having a first flag and a second flag; and further wherein if the first flag is set by the source, the source image data is fully scalable, or if the second flag is set by the source, the source image data is partially scalable; modifying the negotiation field by the sink to change an item of transfer control information, wherein if the first or second flag is set by the source, the sink modifies the dimension parameters to indicate preferred dimensions of the image data; reading the modified negotiation field by the source; and pushing the image data from the source to the sink in accordance with the transfer control information of the modified negotiation field, wherein the image data is pushed in accordance with the preferred dimensions if the first flag is set by the source, or the image data is pushed in accordance with dimensions from a set of dimensions supported by the source that are closest to the preferred dimensions if the second flag is set by the source.