Abstract: For a multi-party advertising exchange including advertising and publishing entities from different advertising networks, the invention provides architectures for an online advertising marketplace that range from lightweight to heavyweight implementations. A lightweight client side implementation of an interface includes centralized processing and storage of federated advertising marketplace data by centralized servers or services. A heavyweight client side implementation of an interface for advertising entities includes providing a peer instance of a federated advertising exchange application or set of processes is provided to each advertising entity as an interface for advertising entities where processing and storage are performed locally to each peer instance. Distributed advertising data can be replicated or synchronized with other peer instances.

Abstract: An audio enhancement system and method is provided wherein a wireless headphone system comprises a transmitter and a receiver. The transmitter for this system broadcasts a Direct Sequence Spread Spectrum (DSSS) CDMA signal on a number of separate code channels in the 902-928 MHz ISM band. Each successive code channel will have its audio signal delayed by a preset period, e.g. 30 mS, relative to the previous channel. A reference signal on one or more separate time synchronized code channels will be simultaneously transmitted from multiple dedicated transmitters within the venue. Analysis of these multiple code channels by the electronics in the headset will provide the headset with an approximate radial distance from the stage. The headset receiver, supporting position location signals, and associated hardware will select the appropriate audio code depending on the listener's distance from the main loudspeakers.