Method and apparatus for picture encoding and decoding

Details Method and apparatus for picture encoding and decoding Method and apparatus for picture encoding and decoding

Filed on

1997-06-19

Date issued

2000-03-21

Examiner

Nguyen, Huy

Patent Class

Motion video signal processing for recording or reproducing

SubClass

Local trick play processing

SubSubClass

With randomly accessible medium

Other Related Categories

386111, 380 10, H04N 591

Type

Patent

Status

active

Patent number

060411600

Description

ABSTRACT:
A picture encoding method in which the picture signal can be scrambled without deteriorating the picture quality of the encoded picture of the MPEG system. A B-picture f the input picture signal is given random offset in the horizontal direction on the slice basis and encoded by an MPEG encoding device. An offset amount is written as a key on the disc along with the encoded data. A decoding device corrects the offset amount in the slice basis using the key of the reproduced signal. The picture signal can be scrambled in this manner without modifying the MPEG system.

REFERENCES:
patent: 4200770 (1980-04-01), Hellman et al.
patent: 5191436 (1993-03-01), Yonemitsu
patent: 5546461 (1996-08-01), Ibaraki et al.
patent: 5706346 (1998-01-01), Katta et al.
patent: 5897218 (1999-04-01), Nishimura et al.

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