Television – Bandwidth reduction system – Data rate reduction
Patent
1995-03-29
1997-07-15
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348699, H04N 732
Patent
active
056488190
ABSTRACT:
Method and corresponding circuit for estimating motion between pictures composed of interlaced fields. Conventionally, such a circuit comprises a channel for searching for the optimum frame vector, which channel is autonomous with respect to that for searching for the optimum field vectors. In accordance with the invention, the channel for searching for the optimum field vectors is unchanged, but for searching for the optimum frame vector the channel comprises two branches which are no longer autonomous but are arranged at the respective output of each sub-stage for searching for the field vector of the channel with a view to determining an approximation of the motion vector which is sufficient for the searched estimation.
REFERENCES:
patent: 5369449 (1994-11-01), Yukitake et al.
patent: 5550591 (1996-08-01), Rim et al.
"Displacement Measurement and Its Application in Interframe Image Coding", IEEE Trans. on Communications, vol. COMM-29, No. 12, Dec. 1981, by Jaswant R. Jain and Anil K. Jain.
"Adaptive Frame/Field Motion Compensated Video Coding", Signal Processing: Image COMM. 5 (Feb. 1993) 39-58, by Atul Puri, R. Aravind and Barry Haskell.
Chin Tommy P.
Gathman Laurie E.
Tung Bryan S
U.S. Philips Corporation
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