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Visually lossless data compression for real-time frame/pushbroom space science imagers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Venbrux, Jack Yeh, Pen-Shu Bhatia, Prakash Miller, Warner H. |
| Copyright Year | 2000 |
| Description | A visually lossless data compression technique is currently being developed for space science applications under the requirement of high-speed push-broom scanning. The technique is also applicable to frame based imaging and is error-resilient in that error propagation is contained within a few scan lines. The algorithm is based on a block transform of a hybrid of modulated lapped transform (MLT) and discrete cosine transform (DCT), or a 2-dimensional lapped transform, followed by bit-plane encoding; this combination results in an embedded bit string with exactly the desirable compression rate as desired by the user. The approach requires no unique table to maximize its performance. The compression scheme performs well on a suite of test images typical of images from spacecraft instruments. Flight qualified hardware implementations are in development; a functional chip set is expected by the end of 2001. The chip set is being designed to compress data in excess of 20 Msamples/sec and support quantizations from 2 to 16 bits. |
| File Size | 254935 |
| File Format | |
| Language | English |
| Publisher Date | 2000-08-04 |
| Access Restriction | Open |
| Subject Keyword | Computer Programming And Software Integrated Circuits Spacecraft Instruments Error Analysis Algorithms Data Compression Imaging Techniques Embedding Discrete Cosine Transform Technology Utilization Real Time Operation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
