18‐4: A Low Latency Compression Algorithm for Visually Lossless Display Stream Systems Using Temporal Differencing. Issue 1 (May 2016)

• Record Type: Journal Article
• Authors: Cook, Gregory W.; Stolitzka, Dale; Lu, Ning
• Is Part Of: Digest of technical papers. Volume 47:Issue 1(2016)
• Page Start: 215
• Page End: 218
• Publication Date: 2016-05
• Subjects: Image compression -- video compression -- display stream compression -- ultra‐high definition -- display interface; Information display systems -- Congresses; 621.3815422
• DOI: 10.1002/sdtp.10640
• Languages: English
• ISSNs: 0097-966X

Abstract

Abstract : This paper describes a low latency compression algorithm intended for use in a visually lossless display stream system in order to improve the quality of still and slowly moving video. The motivation for the algorithm is to utilize a temporal differencing method to provide a low latency coding system that can attain better bits per pixel (bpp) compression than conventional approaches. This particular study observed that an algorithm operating well at 8 bpp without temporal differencing will show similar or better results at 6 bpp with the temporal differencing method. Conventional algorithms tend to grow exponentially in complexity as measured by silicon real estate (gates or line buffer memory, or both) to attain similar results. As complexity grows, so does power consumption. By employing temporal differencing, the inherent redundancy in low motion and still video can be employed to improve the quality of the video. Experimental results are summarized for a still image sequence and a variety of video sequences with varying amounts of motion and type (natural images/computer screen content). A sequence of identical still images benefits the most, with an average gain in PSNR of 8 dB using a test database of 20 different images.