Television camera and display employing quincuncial scanning
AssigneeThomson Consumer Electronics, Inc.
InventorMax Artigalas
Life of this patent
Estimating the term…
Abstract
A television camera and display device, in which a transmission and reception utilizes quincuncial scanning (HDQ) with sub-sampling associated with an optical filter (9) for reducing the diagonal resolution of the image. The filter (9) prevents the folding of the spectrum when subsampling is employed, and permits the simplification of the device. The device may be implemented in both solid-state and vacuum tube form. It is applicable especially to high-definition television having only a restricted pass band and low sampling frequencies, and to the acquisition of and to the visual display of images in HDQ mode.
Claims16
A high definition television receiver device comprising
- a visual display having a plurality of quincumcially disposed display cells, a high definition video signal source (40),
- circuitry (41, 42, 45 and 50) connected between said source and display for generating a signal with a plurality of quincuncial lines (N) and operating in a subsampling mode,
- an optical filter between said display and viewer for correcting diagonal resolution.
A high definition television camera device comprising
- a lens (4) for focusing on an object,
- an image sensor (1) for receiving an image from said lens,
- HDP type circuitry (6, 42, 43, 44) connected to said sensor for scanning said sensor in a plurality of quincuncial lines (N) operating in a subsampling mode and for generating a digital video output signal of said image on said sensor and
- an optical filter (9) between said lens and sensor for reducing diagonal resolution of said image on said screen and for avoiding any folding of the spectrum of said digital output signal due to subsampling by said circuitry.
Dependencies are inferred from the claim text.