Television – Bandwidth reduction system – Data rate reduction
Patent
1994-02-17
1995-11-14
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348699, H04N 736
Patent
active
054671361
ABSTRACT:
A video decoding apparatus including a memory for storing at least first and second reference pictures, a prediction signal forming circuit for forming a prediction signal to produce an output signal, using a first reference signal designated by a first motion vector for the first reference picture and a second reference signal designated by a second motion vector for the second reference picture read out of the memory. Also included is a decoding circuit for decoding the transmitted first motion vector and a transmitted motion vector difference, and for further decoding the second motion vector by adding a scaled motion vector and the motion vector difference. The scaled motion vector is derived by scaling the first motion vector to a motion vector for the second reference picture. Further included is a decoding circuit for decoding a transmitted difference signal and for obtaining the output signal by adding the difference signal and the prediction signal.
REFERENCES:
patent: 5093720 (1992-03-01), Krause et al.
patent: 5168356 (1992-12-01), Acampora et al.
patent: 5173773 (1992-12-01), Ueda et al.
patent: 5175618 (1992-12-01), Ueda et al.
patent: 5317397 (1994-05-01), Odaka et al.
Information Technology, "Generic Coding of Moving Pictures and Associated Audio Information: Video", Recommendation ITU-T H.262, ISO/IEC 13818-2 Draft International Standard, Nov. 9, 1994, pp. i, 87 & 88.
Information Technology, "Generic Coding of Moving Pictures and Associated Audio", Recommendation H.26x, ISO/IEC Draft International Standard, May 12, 1993, pertinent section 7.2.5.
Kikuchi Yoshihiro
Masuda Tadaaki
Odaka Toshinori
Oku Tadahiro
Ueno Hideyuki
Chin Tommy P.
Kabushiki Kaisha Toshiba
Tung Brian S.
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