Abstract: A method and system for transferring data files from a sever entity, such as a server computer, to a client entity, such as a client process running on a remote client computer. The data files are stored in a frequency domain form by the server entity. The client entity can specify certain characteristics for the transfer that may be represented as one or more parameters. Parameters may include a compression ratio and certain data enhancements. Default or computed parameters may be used by the server entity when no client-specified parameters are available. Upon receiving a request for a data file, the server entity retrieves the frequency domain form of the data file, quantizes frequency domain coefficients included in the frequency domain form of the data file according to the parameters, compresses the quantized frequency domain coefficients into a compressed data file, and transfers the compressed data file to the client entity.

Abstract: The present invention provides a computer implemented method and apparatus for modifying data to be used by a client application in a client/server network. The steps for implementing the present invention include: transmitting information to the server computer from the client computer, wherein the transmitted information defines the intended use of data in a client application stored on the client computer; based on the transmitted information, modifying the data to optimize the data for its intended use by the client application, wherein such modification is performed by the server computer before transmitting the modified data to the client application. In the preferred embodiment, the modifications to the data are made as the request is made from the server application. The data modifications are performed by the server computer and are based on information about the client application's intended use of the data.