Rolls-royce Corporation

Creative Technology Corporation

Eng Yeow Cheu

Song Gee Lim

Siew Kiat Leow

Lily Rachmawati

Anna Swider

Eivind Vinje

Martijn De Jongh

The invention is a method that combines the following components: a high pass filter designed to have sufficiently small phase delay and roll-off value in transition band as well as sufficiently good attenuation; a distortion detection and reconstruction introduced by the application of the high pass filter by extraction the significant frequency components in relevant frequency band; a signal compensation that reshapes the output of the high pass filter by matching the filter's phase delay and attenuation characteristics so as to approximate low frequency component extraction that would be produced by an ideal filter (very sharp frequency transition and no delay); a time-domain detection and correction method that addresses special circumstances under which the compensation would be inaccurate to achieve real-time estimate in normal circumstances, and a time-domain correction method during and immediately after sudden changes in composite signal (spike) is detected.

Method of performing real time decomposition of a signal into components

There is provided a method and apparatus for sending an encoded signal between a host station and a client station in which the host station encodes data, encodes the error data resulting from that encoding process and generates user data. Thus, the host station generates three types of data and it accords different priorities to those three data types. The first type of data, the encoded original data is accorded the highest priority and is guaranteed delivery to a client station. Thus, a minimum signal quality is guaranteed at the client end. The second type of data, user data, is accorded a lower priority and will be delivered to the client station if there is available bandwidth once the encoded original data has been successfully delivered. The third type of data, encoded error data is accorded the lowest priority and is only delivered to the client station if there is available bandwidth once the encoded original data and the user data have been delivered. A minimum signal quality is ensured with enhancement allowed if possible. The receiving client station(s) may or may not be capable of decoding the error data and the quality at a particular client station will depend on whether it does so or not.

Real time optimization over a shared communication channel

Growing community of inventors

Singapore, Singapore

Eng Yeow Cheu