Abstract: A subchannel detection system for a wireless communication device is disclosed. The system includes an input interface arranged to receive digital data over a predetermined baseband having a plurality of subchannels a plurality of frequency translators arranged to shift the spectrum of the digital data within a subchannel to the center of the baseband, a plurality of low-pass filters arranged to filter frequencies in the middle of the baseband within a subchannel bandwidth, a plurality of correlators arranged to receive a filtered digital signal and correlate the received signal to a subchannel size, and a processing module arranged to receive data from the plurality of correlators and detect one or more active subchannels. The plurality of frequency translators shift the spectrum of all subchannels in the digital data to the center of the baseband; the shifted spectra are filtered by the plurality of low-pass filters and correlated to individual subchannels.

Abstract: A subchannel detection system for a wireless communication device is disclosed. The system includes an input interface arranged to receive digital data over a predetermined baseband having a plurality of subchannels a plurality of frequency translators arranged to shift the spectrum of the digital data within a subchannel to the center of the baseband, a plurality of low-pass filters arranged to filter frequencies in the middle of the baseband within a subchannel bandwidth, a plurality of correlators arranged to receive a filtered digital signal and correlate the received signal to a subchannel size, and a processing module arranged to receive data from the plurality of correlators and detect one or more active subchannels. The plurality of frequency translators shift the spectrum of all subchannels in the digital data to the center of the baseband; the shifted spectra are filtered by the plurality of low-pass filters and correlated to individual subchannels.

Abstract: A method and apparatus for transferring data in response to authentication information. Authentication information is transmitted from a client computer to a server computer to authorize access to restricted data. Invocation information is transmitted from the server computer to the client computer in response to the authentication information. A first application is invoked in the client computer using the invocation information. The restricted data is then transmitted from the server computer to the first application program in the client computer based on the access authorized by the authentication information.

Abstract: A method and apparatus transfer digital images on a network. A signature list is first examined wherein the signature list includes a unique signature for each of the digital images requested for transfer. The signature list is used to determine whether each of the digital images is present or missing. For each of the digital images that is determined missing, the digital image is then received. Updated information is also received pertaining to the each of the digital images that is determined present. Data integrity is checked to ensure that the each of the digital images was successfully transferred. Finally, the steps of receiving the digital images and checking data integrity are repeated for the each of the digital images that was unsuccessfully transferred.

Abstract: Methods and apparatuses for publishing a collection of digital media on a network. In one example of a method, a client digital processing system generates a collection of digital media and transmits collection information, which describes the collection of digital media, to a server digital processing system. From the collection information, a plurality of presentable media is automatically generated; each of these presentable media is capable of being presented to other client digital processing systems which are coupled to the network. In this one example, the network is operating according to a hypertext transfer protocol. In this one example, the client and server systems are programmed to interact together such that the presentable media is automatically generated.

Abstract: A method and apparatus for transferring data in response to authentication information. Authentication information is transmitted from a client computer to a server computer to authorize access to restricted data. Invocation information is transmitted from the server computer to the client computer in response to the authentication information. A first application is invoked in the client computer using the invocation information. The restricted data is then transmitted from the server computer to the first application program in the client computer based on the access authorized by the authentication information.