Surface wave device for use in a ghost cancellation system

Details Surface wave device for use in a ghost cancellation system Surface wave device for use in a ghost cancellation system

H - Electricity

04

N

333/36, 350/81

H04N 5/21 (2006.01) H03H 9/02 (2006.01) H03H 9/42 (2006.01)

Patent

CA 1080348

Abstract of the Disclosure A ghost cancellation system includes a surface-wave device operable for developing a replica of the ghost component of a video signal, which replica is combined with the video signal to eliminate or cancel the ghost component. The surface- wave device comprises an input transducer responsive to a modu- lated video signal for launching uniform acoustic surface-waves along a path traversing a balanced pair of output transducers and impinging upon a reflector array. The reflector array includes means for initiating non-uniform surface-wave reflec- tions suitable for causing the output transducers to develop an output electrical signal comprising the ghost replica.

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