NASA NTRS · 19820060275
Entropy encoding applied to a video DM bit stream
Abstract
This paper investigates bandwidth compression of delta modulated video signals using a variety of novel techniques. The video signal is encoded at 16 MHz with an adaptive delta modulator (ADM) using the Song video mode algorithm. One method of achieving bandwidth compression is through the detection and reduction of steady state patterns in the DM bit stream. Further reduction is obtained by deleting the horizontal and vertical drive information. Finally, a modified ADM algorithm is introduced to increase the frequency of steady state patterns. When the modified ADM is combined with entropy coding a 30-50% data compression can be realized.
Keep this discovery
Explore connections, maps & timelines
Barba, J., Scheinberg, N., Schilling, D. L., Locicero, J. L.. 1981-01-01. Entropy encoding applied to a video DM bit stream. https://ntrs.nasa.gov/citations/19820060275
Cite the original work for its findings. Save a collection to share your selection of sources.