Television – Bandwidth reduction system – Data rate reduction
Patent
1997-06-25
1999-01-05
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348415, 348413, 348699, 348411, H04N 718
Patent
active
058568484
ABSTRACT:
A moving image coder has an arithmetic unit for calculating an average value of a coding object block; an arithmetic unit for obtaining an alternating current component by subtracting the average value from each of pixel values of the coding object block; an arithmetic unit for obtaining a intra frame activity amount by making a calculation of the same kind as an error calculation in a motion prediction with respect to the obtained alternating current component; and a comparator for comparing the intra frame activity amount with a predicting error amount calculated when the motion prediction is made. The inter frame coding mode or the intra frame coding mode is judged by large and small relations of the predicting error amount and the intra frame activity amount. In this moving image coder, codings of a intra frame block and a inter frame differential block are adaptively switched in a small hardware scale.
REFERENCES:
patent: 4685115 (1987-08-01), Akagiri et al.
patent: 5103307 (1992-04-01), Sugiyama
patent: 5241383 (1993-08-01), Chen et al.
patent: 5327173 (1994-07-01), Nishizawa et al.
patent: 5386234 (1995-01-01), Veltman et al.
patent: 5404174 (1995-04-01), Sugahara
patent: 5410553 (1995-04-01), Choon
patent: 5436665 (1995-07-01), Ueno et al.
patent: 5459517 (1995-10-01), Kunitake et al.
patent: 5467086 (1995-11-01), Jeong
patent: 5488482 (1996-01-01), Ueda et al.
patent: 5541661 (1996-07-01), Odaka et al.
patent: 5570133 (1996-10-01), Yagasaki
Hiroshi Watanabe, "MPEG2 Interframe Prediction", Oct. 1992, pp. 37-42, ITEJ Technical Report, vol. 16, No. 61.
Aono Tomoko
Fujiwara Yoichi
Katata Hiroyuki
Kusao Hiroshi
Miyake Toshiyuki
Chin Tommy P.
Rao Anand S.
Sharp Kabushiki Kaisha
LandOfFree
Moving image coder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Moving image coder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Moving image coder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-866187