Sarnoff Corporation

Other

General Electric Company

Arthur Lee Greenberg

Charles Benjamin Dieterich

Sharyn L Drasner

Bruce J Anderson, Jr

Nadine Lamont

A method and apparatus for analyzing and monitoring packet streams in 'real time'. The packet analyzer comprises an input buffer, a real-time analysis unit, a non-real-time analysis unit, a graphics unit, a monitor and a flushing circuit. A packet stream is received into the input buffer where the data is either read by the real-time analysis unit or flushed by the flushing circuit. Messages are passed between the real-time analysis unit and the non-real-time analysis unit to report on detected errors or to update packet stream information. In turn, real time packet stream information are displayed and updated on a display via the graphic unit. A method of detecting framing errors in a packet stream is incorporated by setting a 9th bit in the input buffer for each byte of data in a packet.

Method and apparatus for analyzing and monitoring packet streams

A method and apparatus for analyzing and monitoring packet streams in &ldquo;real time&rdquo;. The packet analyzer comprises an input buffer, a real-time analysis unit, a non-real-time analysis unit, a graphics unit, a monitor and a flushing circuit. A packet stream is received into the input buffer where the data is either read by the real-time analysis unit or flushed by the flushing circuit. Messages are passed between the real-time analysis unit and the non-real-time analysis unit to report on detected errors or to update packet stream information. In turn, real time packet stream information are displayed and updated on a display via the graphic unit. A method of detecting framing errors in a packet stream is incorporated by setting a 9th bit in the input buffer for each byte of data in a packet.

A set top terminal for receiving information transmitted from a service provider, for receiving control information transmitted by a service provider, and for transmitting control information from the set top terminal to the service provider to interactively control the services that are being received. The set top terminal receives display images via an information channel carrying both conventional analog cable television signals and digital television signals. Additionally, set top terminal control signals are sent from the service provider via a command channel and the set top terminal sends control signals to the service provider via a back channel.

Set top terminal for an interactive information distribution system

Deghosting apparatus for eliminating multipath signal components in a received transmitted television signal incorporates a training signal which is a finite duration sequence of repetitions of a 2.sup.n -1 psuedorandom sequence. The 2.sup.n -1 pseudorandom sequences are mapped into 2.sup.r sample intervals at either the transmitter or the receiver to facilitate fast Fourier transform processing. Power spectra of the received and mapped training signal and a stored version of the training signal are deconvolved with the deconvolution coefficients produced in logarithmic form. The logarithms are inverse Fourier transformed to produce delay coefficients related to the time of occurrence of the multipath signals, which coefficients are utilized to program variable delay circuitry in an adaptive filter to cancel the multipath components.

Deghosting apparatus using pseudorandom sequences

Ceiling fan adapter hub

A stereo sound and light track system includes one or more sound fixtures and one or more light fixtures, each fixture being independently mounted for movement on a track to any mounted position thereon. A bus bar assembly including audio bus bar conductors and power bus bar conductors are mounted on the track which is grounded. Connectors are provided on the fixtures to make electromechanical contact with the appropriate bus bar conductors and ground. Stereo sound can be transmitted by the sound fixtures and light can be emitted from the light fixtures in any of their respective mounted positions.

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Annandale, NJ, United States of America

Arthur Lee Greenberg