Television – Image signal processing circuitry specific to television – Motion vector generation
Patent
1997-10-10
2000-07-18
Ho, Tuan
Television
Image signal processing circuitry specific to television
Motion vector generation
348416, H04N 514
Patent
active
060914602
ABSTRACT:
In an image signal encoding method for encoding an image signal using motion compensation, a motion vector is found by means of a block matching method, a first distortion SEmc of motion compensated prediction associated with the motion vector, and a second distortion SEnomc of prediction without motion compensation are detected, the motion vector is used for for inter-picture prediction encoding when SEnomc>SEmc+K, with K being a constant greater than 0, and a vector having a value zero is used, in place of the motion vector, for inter-picture prediction encoding when SEnomc.ltoreq.SEmc+K. In another aspect, a speed of motion in a sequence of pictures is detected, and for a part of the sequence of pictures detected to contain a quick motion, the prediction encoding is performed using one-way prediction encoding, and for a part of the sequence of pictures without a quick motion, prediction encoding is performed using bi-directional prediction encoding. In another aspect, the image signal is subsampled for each field, and a motion vector is determined using the field-subsampled image signal.
REFERENCES:
patent: 4937666 (1990-06-01), Yang
patent: 5489949 (1996-02-01), Jeong et al.
patent: 5745182 (1998-04-01), Yukitake et al.
patent: 5825423 (1998-10-01), Jung
International Organization for Standardization, ISO-IEC/JTC1/SC29/WG11, Coded Representation of Picture and Audio Information, Jul. 1992, Test Model 2.
Hasegawa Hiromu
Hatano Yoshiko
Kasezawa Tadashi
Mishima Hidetoshi
Okazaki Koji
Boccio Vincent F.
Ho Tuan
Mitsubishi Denki & Kabushiki Kaisha
LandOfFree
Video signal encoding method and system 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 encoding method and system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video signal encoding method and system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2042237