Deemphasis & Subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal
June 7, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesSpatial-temporal frequency interleaved processing of a television signal with reduced amplitude interleaved sections Television signal transmission system Non-linear digital emphasis circuit Video recording apparatus which records chrominance information at a lower frequency band coincident with the luminance signal frequency band Method and apparatus for encoding component digital video signals so as to compress the bandwidth thereof, and for decoding the same Method for transmitting a television signal by field to field processing Video recorder using extended tape tracks to record compressed chrominance Video processing in which high frequency luminance components are folded into a mid-band spectrum Color television signal transmission system and improved-definition receiver for use in the system High resolution color television signal transmission system and receiver utilizing motion information of a picture Inventors
AssigneeApplicationNo. 484707 filed on 06/07/1995US Classes:386/9, Signal amplitude level control348/708, Color television signal processing348/712, Luminance channel circuitry386/33Compressing when recording or decompressing when reproducingExaminersPrimary: Truong, KhoiAttorney, Agent or FirmForeign Patent References
International ClassH04N 009/79AbstractA system for reproducing a luminance signal from a medium containing a previously recorded luminance signal with a high-frequency portion thereof compressed in dynamic range includes a circuit for recovering that luminance signal from the medium. Filtering is done to separate the low-frequency and compressed-in-dynamic-range high-frequency portions of the recovered luminance signal from each other. A corer responds to the separated compressed-in-dynamic-range high-frequency portion of the recovered luminance signal to provide a cored high-frequency portion with expanded dynamic range and reduced noise. The level of the cored high-frequency portion with expanded dynamic range and reduced noise is then boosted by a predetermined amount to compensate for energy losses during the compression of the dynamic range and added back to the low-frequency portion of the recovered luminance signal to reproduce a full-band luminance signal with at least partially restored dynamic range for high-frequencies and without readily visible high-frequency noise.Other References
| |
