Television – Bandwidth reduction system – Data rate reduction
Patent
1995-04-28
1997-02-25
Au, Amelia
Television
Bandwidth reduction system
Data rate reduction
348403, H04N 730
Patent
active
056063725
ABSTRACT:
An apparatus for decoding an encoded digital image signal having a data signal and an information signal, wherein the data signal includes a plurality of blocks of quantized transformed coefficients, each of the blocks including a DC coefficient and a predetermined number of AC coefficients, and said information signal includes each QS for each of the blocks, includes: an inverse quantizer for performing an inverse quantization on a subjective block with its corresponding QS to produce an inverse quantized DC coefficient and a plurality of inverse quantized AC coefficients; a candidate DC coefficient generator for determining a DC coefficient range and altering the value of the inverse quantized DC coefficient within the range to generate a predetermined number of candidate DC coefficients; a number of inverse discrete cosine transformer for performing inverse discrete cosine transformation on each of the candidate DC coefficients combined with the inverse quantized AC coefficients; and a comparator for comparing each of the results from the IDCT with previously performed IDCT results so as to enable the selection of an IDCT result producing a minimum blocking effect which occurs because of a luminance pixel difference between the previously performed IDCT results and the selected IDCT result.
REFERENCES:
patent: 5025482 (1991-06-01), Murakami et al.
patent: 5136371 (1992-08-01), Savatier et al.
patent: 5357282 (1994-10-01), Lee
Au Amelia
Daewoo Electronics Co. Ltd.
LandOfFree
Video signal decoding apparatus capable of reducing blocking eff does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Video signal decoding apparatus capable of reducing blocking eff, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video signal decoding apparatus capable of reducing blocking eff will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1977506