Picture data processing apparatus

Details Picture data processing apparatus Picture data processing apparatus

1993-03-16

1995-03-14

Chin, Tommy P.

Television

Bandwidth reduction system

Data rate reduction

348420, H04N 7133

Patent

active

053980670

ABSTRACT:
A picture data processing apparatus, which is suitably applied, for instance, to a television conference system in which picture data are transmitted in the form of codes prevents, deterioration of the picture quality even if an edge in the picture data exits. In the apparatus, the presence or absence of an edge is detected for each block, and when a block having an edge is detected, a Wavelet transform is employed in transmission of the picture data, whereas a discrete cosine transform is employed when the block has no detected edge.

REFERENCES:
patent: 4224678 (1980-09-01), Lynch et al.
patent: 4242733 (1980-12-01), Deal
patent: 4242734 (1980-12-01), Deal
patent: 4546385 (1985-10-01), Anastassiou
patent: 4933763 (1990-06-01), Chantelou
patent: 5148501 (1992-09-01), Enomoto et al.
Rioul, O. and Vetterli, M, "Wavelets and Signal Processing", IEEE Signal Processing Magazine, vol. 8, No. 4, Oct. 1991, pp. 14-38.
Eddins, S. et al., "An Edge Modeling and Reconstruction Approach to Subband Image Coding", IEEE International Symposium on Circuits and Systems, Portland, Ore., May, 1989, pp. 25-28.

Affiliated with

Also associated with

Rating

Picture data processing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Picture data processing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Picture data processing apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-715797