System for extracting coding parameters from video data

Details System for extracting coding parameters from video data System for extracting coding parameters from video data

1998-01-30

2000-08-08

Lee, Thomas D.

Image analysis

Image compression or coding

Adaptive coding

382251, 348405, G06K 936, H04N 712

Patent

active

061012785

ABSTRACT:
A system extracts, from uncoded video data, coding parameters that correspond substantially to coding parameters used in a coding operation that was previously performed on the video data. The system generates a histogram for at least one AC frequency band in the uncoded video data and calculates a correlation function for the histogram. A maximum value of the correlation function is then identified, and a coding parameter for the at least one AC frequency band is determined using the maximum value of the correlation function.

REFERENCES:
patent: 5072290 (1991-12-01), Yamagami et al.
patent: 5146324 (1992-09-01), Miller et al.
patent: 5150208 (1992-09-01), Otaka et al.
patent: 5719643 (1998-02-01), Nakajima
patent: 5905819 (1999-05-01), Daly
patent: 5930398 (1999-07-01), Watney

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