Image analysis – Image compression or coding – Including details of decompression
Reexamination Certificate
1998-03-18
2001-08-28
Couso, Yon J. (Department: 2623)
Image analysis
Image compression or coding
Including details of decompression
C386S349000
Reexamination Certificate
active
06282320
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a video data decoding apparatus, a video data decoding method, a video signal reproduction apparatus, and video signal reproduction apparatus for intermittently decoding a video data which has been compressed by utilizing a correlation in the time axis direction between a plurality of frames.
2Description of the Prior Art
In the conventional DVD (digital video disc: DVD-VIDEO), for carrying out a special reproduction such as a forward high-speed reproduction and a backward high-speed reproduction, only one I picture (intra coded picture) is used in the MPEG2 (Moving Picture Experts Group 2).
However, when a special reproduction is carried out by using only the I picture, there is a problem that an information amount is insufficient and reproduced picture looks like a high-speed display of slides. Moreover, the information amount is too small even if compared to a high-speed reproduction of a VTR or the like. The display interval is affected by a decoding time and the like and causes a strange feeling.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a video data decoding apparatus, a video data decoding method, a video signal reproduction apparatus, and a video signal reproduction method capable of outputting a video data of smooth display when carrying out a special reproduction such as a forward and a backward high-speed reproduction.
REFERENCES:
patent: 5535008 (1996-07-01), Yamagishi et al.
patent: 5602956 (1997-02-01), Suzuki et al.
patent: 5854873 (1998-12-01), Mori et al.
patent: 5867176 (1999-02-01), Yamagishi
patent: 5870523 (1999-02-01), Kikuchi et al.
Hasegawa Akira
Ishida Takayuki
Mizuno Masayoshi
Shimizu Yoshinori
Couso Yon J.
Frommer William S.
Frommer & Lawrence & Haug LLP
Savit Glenn F.
Sony Corporation
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