Image analysis – Image compression or coding – Predictive coding
Patent
1994-07-19
1996-08-06
Couso, Jose L.
Image analysis
Image compression or coding
Predictive coding
341 76, 348402, 348423, G06K 936, H03M 730, H04N 712
Patent
active
055442668
ABSTRACT:
Known transcoders for compressed video signals comprise a decoder and a coder coupled thereto, between which a data signal is transmitted. Because compressed video signals comprise so-called difference pictures and normal pictures, both the decoder and the coder should have a feedback loop which is utilized in decoding and coding a difference picture and is not utilized in decoding and coding a normal picture. For example, for the purpose of prediction means (motion compensation and motion estimation) present in the feedback loop of the coder, much computation has to be carried out in the coder. The computation required is considerably reduced by concomitantly transmitting one or more information signals in addition to the data signal in a transcoder according to the invention, and complete decoding and complete coding no longer takes place.
REFERENCES:
patent: 4047151 (1977-09-01), Rydbeck et al.
patent: 4825285 (1989-04-01), Speidel et al.
patent: 4972484 (1990-11-01), Theile
patent: 5121202 (1992-06-01), Tanoi
patent: 5138315 (1992-08-01), Le Queau et al.
patent: 5334977 (1994-08-01), Kato
patent: 5422672 (1995-06-01), Horst et al.
M. W. A. David et al., "A Third Generation Algorithm for use in High Definition Frame Rate Converters", 18th International Television Symposium and Technical Exhibition, 10-15 Jun. 1993, cover & pp. 432-447.
C. Dosch, "Direct satellite broadcasting of digital HDTV in the 20 GHz frequency range", EBU Review Technical, No. 244, Dec. 1990, Brussels, BE, pp. 217-228.
M. Liebhold et al., "Toward an Open Environment for Digital Video", Communications of the ACM, Apr. 1991, vol. 34, No. 4, cover page and pp. 104-112.
B. Pank, "Picture Conversion for HD Graphics", 17th International Television Symposium and Technical Exhibition, Montreux, Switzerland, 13-18 Jun. 1991, 2 cover pages and pp. 552-558.
Koppelmans Johannes F. A.
Koster Arian
Schinkel Dolf A.
Bella Matthew C.
Couso Jose L.
Koninklijke PTT Nederland N.V.
Michaelson, Esq. Peter L.
Pokotylo, Esq. John C.
LandOfFree
Transcoding device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transcoding device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transcoding device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2198505