Enhanced resolution extended definition television system

U.S. Patent Number: 5387939

Abstract: An NTSC compatible television system capable of enhanced resolution images with an appropriate receiver is described. The video transmission associated with this system may be received by a standard NTSC television receiver and displayed in letter box format. The added information required to achieve enhanced resolution in an 16 by 9 format is bit reduced and transmitted either during the mask areas present when viewing the signal on an NTSC standard receiver and/or in a quadrature channel typically not detectable without a special decoder by the NTSC receiver. The digital information transmitted during the mask areas, the NTSC image, and the digital information transmitted via the quadrature channel are combined to arrive at the enhanced resolution television display.

Inventors: Naimpally; Saiprasad V. (Langhorne, PA)

Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka, JP)

Application Number: 08/087,964

Issued: 1995-02-07

Expired: 2007-02-07

Classes: 375/240.01 ; 348/913; 348/E7.002

Field of search: 358/11-13,140,141,142,147,146,133

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