Programmable instrument for automatic measurement of compressed

Details Programmable instrument for automatic measurement of compressed Programmable instrument for automatic measurement of compressed

1996-02-12

1998-10-06

Peng, John K.

Television

Monitoring, testing, or measuring

Transmission path testing

348181, 348189, H04N 1700

Patent

active

058185208

ABSTRACT:
A method of automatic measurement of compressed video quality superimposes special markings in the active video region of a subset of contiguous frames within a test video sequence. The special markings provide a temporal reference, a spatial reference, a gain/level reference, a measurement code, a test sequence identifier and/or a prior measurement value. The temporal reference is used by a programmable instrument to extract a processed frame from the test video sequence after compression encoding-decoding which is temporally aligned with a reference frame from the test video sequence. The spatial reference is used by the programmable instrument to spatially align the processed frame to the reference frame. The measurement code is used by the programmable instrument to select the appropriate measurement protocol from among a plurality of measurement protocols. In this way video quality measures for a compression encoding-decoding system are determined automatically as a function of the special markings within the test video sequence.

REFERENCES:
patent: 4368486 (1983-01-01), Degoulet et al.
patent: 5208666 (1993-05-01), Elkind et al.
patent: 5214508 (1993-05-01), Stevens
patent: 5446492 (1995-08-01), Wolf et al.
patent: 5504931 (1996-04-01), Furtek
patent: 5574500 (1996-11-01), Hamada et al.

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