Video signal emphasis and deemphasis method and apparatus

Details Video signal emphasis and deemphasis method and apparatus Video signal emphasis and deemphasis method and apparatus

1996-08-29

1998-06-23

Than, Thai

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

286 93, H04N 5923

Patent

active

057713332

ABSTRACT:
An input video signal is applied to a transmission line first through a time direction emphasizer for emphasizing the levels of time direction high frequency components of the video signal, relative to the levels of low frequency components thereof; secondary through a vertical direction emphasizer; and thirdly through a horizontal direction emphasizer. Further, the received video signal is outputted as an output video signal from the transmission line first through a horizontal direction deemphasizer for deemphasizing the levels of horizontal direction high frequency components of the video signal, relative to the levels of low frequency components thereof; secondary through a vertical direction deemphasizer; and thirdly through a time direction deemphasizer. The emphasis and deemphasis method enables the dynamic range of the transmission line to be utilized effectively, while preventing erroneous operation on the reception side.

REFERENCES:
patent: 4618893 (1986-10-01), Hirota et al.
patent: 4626927 (1986-12-01), Hiroto et al.
patent: 4658305 (1987-04-01), Tsushima
patent: 5126846 (1992-06-01), Niimura
patent: 5179476 (1993-01-01), Fujimoto et al.
patent: 5194998 (1993-03-01), Kawasaki
patent: 5305112 (1994-04-01), Yamamoto et al.
Patent Abstract of Japan, vol. 13, No. 277 (E-778), Jun. 26, 1989 & JP-A-01 064 480 (Nippon Hoso Kyokai), Mar. 10, 1989.
Patent Abstract of Japan, vol. 17, No. 125 (E-1332), Mar. 16, 1993 & JP-A-04 299 672 (Victor Co. of Japan Ltd.) Oct. 22, 1992.
Patent Abstract of Japan, vol. 11, No. 363 (E-560), Nov. 26, 1987 & JP-A-62 137 994 (Sony Corporation), Jun. 20, 1987.
Patent Abstract of Japan vol. 11, No. 363 (E-560), Nov. 26, 1987 & JP-A-62 137 995 (Sony Corporation), Jun. 20, 1987.
Patent Abstract of Japan vol. 14, No. 79 (E-888), Feb. 14, 1990 & JP-A-01 291 592 (Matusushita Elec. Ind. Co.) Nov. 24, 1989.
Development of Temporal Emphasis System, ITEC 1990, pp. 417 and 418.
Development of Emphasis in Video Signal Recording/Reproducing Apparatus, ITEC 1984, pp. 321-322.
Temporal Emphasis for Video Tape Recorder, ITEC 1992, pp. 341 and 342.

Affiliated with

Also associated with

Rating

Video signal emphasis and deemphasis method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Video signal emphasis and deemphasis method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video signal emphasis and deemphasis method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1400125