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Digital tv processing system
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 1975 |
| Description | Two digital video data compression systems directly applicable to the Space Shuttle TV Communication System were described: (1) For the uplink, a low rate monochrome data compressor is used. The compression is achieved by using a motion detection technique in the Hadamard domain. To transform the variable source rate into a fixed rate, an adaptive rate buffer is provided. (2) For the downlink, a color data compressor is considered. The compression is achieved first by intra-color transformation of the original signal vector, into a vector which has lower information entropy. Then two-dimensional data compression techniques are applied to the Hadamard transformed components of this last vector. Mathematical models and data reliability analyses were also provided for the above video data compression techniques transmitted over a channel encoded Gaussian channel. It was shown that substantial gains can be achieved by the combination of video source and channel coding. |
| File Size | 8938541 |
| Page Count | 128 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19760008148 |
| Archival Resource Key | ark:/13960/t01z90132 |
| Language | English |
| Publisher Date | 1975-11-26 |
| Access Restriction | Open |
| Subject Keyword | Space Communications, Spacecraft Communications, Command And Tracking Data Links Television Systems Data Compression Space Shuttles Color Television Data Processing Mathematical Models Video Data Reliability Digital Data Information Systems Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
