Image analysis – Image compression or coding
Patent
1996-04-05
1998-03-24
Couso, Jose L.
Image analysis
Image compression or coding
382236, 382238, 348416, G06K 936
Patent
active
057321558
ABSTRACT:
A device for coding picture data by compression has a button circuit and a controller. When a button included in the button circuit is pushed by hand to enter a still picture mode command, the controller assigns a still picture mode to a group of pictures (GOP) appearing after the input of the command. For the GOP to be processed in the still picture mode, the controller substitutes an I picture (Intra-Picture) for at least one P picture (Predictive-Picture) included in the preceding GOP processed in a moving picture mode. At the same time, the controller sends to a multiplexer, information representative of the replacement of the picture type and information representative of the assignment of the still picture mode to the GOP. The multiplexer multiplexes such information in the preselected position of an output data format. On the other hand, a device for reproducing the picture data by expansion has a demultiplexer and a controller. The demultiplexer feeds to the controller the information representative of the still picture mode and the information representative of the replacement of the picture type. In response, the controller causes a decoder and following circuitry to decode the I picture data and write the resulting data in a first or a second predictor. A video signal representative of a still picture based on the stored picture data is output via a digital-to-analog converter.
REFERENCES:
patent: 4849810 (1989-07-01), Ericsson
patent: 5379351 (1995-01-01), Fandrianto et al.
Hiroshi Fujiwara, "The Newest MPEG Textbook", pp. 98-126 published Aug. 1, 1994 by Kabushiki Kaisha ASCII, Tokyo Japan.
"Information Technology -Coding of Moving Pictures and Associated Audio for Digital Storage Media up to About 1,5 Mbit/s", Draft Intl. Standard IS/IEC DIS 11172, pp. 140-168, Intl. Organization for Standardization, 1992.
Couso Jose L.
Do Anh Hong
Fuji Photo Film Co. , Ltd.
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