System comprising at least one encoder for coding a digital sign

Details System comprising at least one encoder for coding a digital sign System comprising at least one encoder for coding a digital sign

1993-09-10

1995-04-25

Hoff, Marc S.

Coded data generation or conversion

Digital code to digital code converters

348412, 341 76, H03M 100, H04N 713

Patent

active

054103070

ABSTRACT:
Known systems based on layered video coding and video decoding code with inadequate efficiency because a new high-resolution picture is predicted by means of switching means present in the system either on a basis of the preceding high-resolution picture or on the basis of an instantaneous low-resolution picture. According to the invention, designing the switching means for a adjustment of a ratio of the signal representing a preceding high-resolution picture and the signal representing the instantaneous low-resolution picture and for then adding both adjusted signals achieves a gain of 3 dB in the prediction with the correct ratio, thus resulting in an improvement in the coding efficiency.

REFERENCES:
patent: 4518950 (1985-05-01), Petr
patent: 4549304 (1985-10-01), Weirich et al.
patent: 4999705 (1991-03-01), Puri
patent: 5063443 (1991-11-01), Okajima et al.
patent: 5173773 (1992-12-01), Ueda et al.

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