Abstract: A system and method for streaming data over a communications network with varying streaming conditions, include a conditioning unit for conditioning the data by creating a plurality of representations, a packaging unit responsive to the conditioning unit for packaging the plurality of conditioned data representations, a media server responsive to the packaging means for observing at least one current streaming condition and selecting a most appropriate packaged conditioned data representation in accordance with the observed at least one current streaming condition, and a communications network responsive to the media server for streaming the selected packaged conditioned data representation.

Abstract: An apparatus, a method and a system to efficiently manipulate in the compressed domain, spatial and/or temporal scaling of matching pursuit-coded digital signals. These manipulations, referred to as transcoding, may take place at a transcoding proxy located at an origin server, in any intermediary along the transmission path from the origin server to the client device, and/or at the client device. The preferred embodiment focuses on a method to perform rate adaptation and spatio-temporal scaling of a video stream composed of 3-D atoms in order to serve a set of heterogeneous client devices (e.g., a high-end personal computer, a personal digital assistant and a wireless phone). The proposed method applies to 1-D atoms (decomposition of audio signals) and 2-D atoms (image decomposition).

Abstract: An apparatus, a method and a system to efficiently manipulate in the compressed domain, spatial and/or temporal scaling of matching pursuit-coded digital signals. These manipulations, referred to as transcoding, may take place at a transcoding proxy located at an origin server, in any intermediary along the transmission path from the origin server to the client device, and/or at the client device. The preferred embodiment focuses on a method to perform rate adaptation and spatio-temporal scaling of a video stream composed of 3-D atoms in order to serve a set of heterogeneous client devices (e.g., a high-end personal computer, a personal digital assistant and a wireless phone). The proposed method applies to 1-D atoms (decomposition of audio signals) and 2-D atoms (image decomposition).

Abstract: A system, method, and computer product that accelerates encryption and decryption of data while using both a static key and a dynamic key. The present invention eliminates intermediate decryption of data that is transmitted between computer systems. More particularly, encryption efficiency is improved by eliminating decryption of the statically encrypted data while incorporating the advantages of a dynamic key such as enabling rapid change of the dynamic key. The efficiency improvements reduce the computer resources required to protect the data and therefore stronger data encryption may be enabled with the saved computer resources. End-to-end security of the data is maintained without the need for trusted data servers.