Coding of Video Signals at 50 Kb/s using Motion Compensation Techniques

Sabri, S.; Cuffing, K.; Prasada, B.

doi:10.1109/milcom.1983.4794813

Cited by 10 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…F OR the digital transmission of videoconference and video tele phony signals, mainly low bit rates in the range of 384 kb/s to 64 kb/s are under consideration internationally. In order to reduce the data rate of the video camera signals, source coding schemes with motion-compensating prediction are applied [4], [9], [11]- [13], [15], [16]. This prediction method reduces prediction errors in static as well as in moving object regions; but it fails where the scene background is uncovered by a moving object since new picture information appears, for which no corresponding information can be found in the previous picture (see Fig.…”

Section: Introductionmentioning

confidence: 99%

Efficiency analysis and application of uncovered background prediction in a low bit rate image coder

Hepper

1990

IEEE Trans. Commun.

View full text Add to dashboard Cite

A fast algorithm for gaining scene background information from a TV sequence is presented. This picture information is used by an uncovered background predictor in a motion-compensating predictive coder for vidéoconférence or picture telephone applications. In uncov ered background regions, prediction error entropy is reduced close to the value of the frame difference entropy in static regions, which is regarded as a practical lower bound. Almost all these picture elements can therefore be reconstructed without transmission. A motion-com pensating hybrid-DPCM/transform coder is supplemented by uncovered background prediction. The maximum bit rate reduction achieved in the experiments is 9% for a picture where 14% of the picture elements of temporally changed regions belong to uncovered background regions.

show abstract

Section: Introductionmentioning

confidence: 99%