Refinement of interpolated signals

Details Refinement of interpolated signals Refinement of interpolated signals

2000-12-22

2004-11-30

Chaki, Kakali (Department: 2124)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S209000, C708S313000, C708S402000

Reexamination Certificate

active

06826584

ABSTRACT:

FIELD OF INVENTION
The invention is related to the field of signal reconstruction.
BACKGROUND OF THE INVENTION
In the field of signal compression, a signal is frequently decimated to a prescribed size and format prior to applying the compression standard. For example, the H.261 Standard is used in video conference systems that interface with a 484 line interlaced display, but the luminance channel input is assumed to be progressive scan data of size either 144 rows of 176 pixels or 288 rows of 352 pixels. A typical video coding system must first decimate the larger input image down to the size expected by the video coder and then the typical decoding equipment must reverse this operation for the display. Similar techniques are employed in systems based on the H.263, MPEG-1, MPEG-2, and other coding systems.
SUMMARY OF THE INVENTION
A method including decimating a signal x using a filter f to obtain a decimated signal y, interpolating the decimated signal y to obtain a reconstructed signal z, determining a refinement factor s by decimating z and comparing decimated z to the decimated signal y, and determining an improved reconstructed signal r by using the refinement factor s, the filter f, and the reconstructed signal z is disclosed.


REFERENCES:
patent: 4447886 (1984-05-01), Meeker
patent: 5253192 (1993-10-01), Tufts
patent: 5420891 (1995-05-01), Akansu
patent: 5561424 (1996-10-01), Norsworthy et al.
patent: 5585802 (1996-12-01), Cabler et al.
patent: 6208671 (2001-03-01), Paulos et al.
patent: 6256347 (2001-07-01), Yu et al.
patent: 6298361 (2001-10-01), Suzuki
patent: 6363405 (2002-03-01), Loginov
patent: 6421464 (2002-07-01), Tran et al.
Kou-Hu et al., Compatible HDTV Coding for Broadhand ISDN, 1998, IEEE, pp. 0743-0749.*
Din-Yuen et al., Fast Implementation of MPEG Audio Coder Using Recursive Formula with Fast Discrete Cosine Transforms, 1996, IEEE, pp. 144-148.*
Peter et al., A General Formulation of Modulated Filter Banks, 1999, IEEE, pp. 986-1002.*
Remy et al., Downsampling versus Folding in the DCT Domain, 1996, IEEE, pp. 2887-2891.

Affiliated with

Also associated with

Rating

Refinement of interpolated signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Refinement of interpolated signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Refinement of interpolated signals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3319690