Comparison of Code-Pass-Skipping Strategies for Accelerating a JPEG 2000 Decoder

Abstract Code-Pass-Skipping allows a JPEG 2000 decoder to be accelerated by sacrificing the output precision. This paper presents an evaluation on how the speed gain can be maximized and the quality loss minimized. In particular, the scenario of rendering a 24-bit preview of a Digital Cinema Package (DCP) with the maximum permitted bitrate is examined. A comparison shows that a new proposed strategy outperforms the reference implementation from Kakadu Software v6 by up to 1 dB. Furthermore, it is shown what speed gain can be achieved for a given acceptable quality loss

Evaluation of 3D-Video Compression for Automotive Stereo Vision Systems

Abstract This paper is an evaluation of the distribution of quantized coefficients resulting from the disparity of an automotive stereo vision system. The system captures the scene with two cameras, computes the disparity with Semi-Global Matching and encodes the left view and the disparity for transmission. Real world and synthetic video sequences were used to evaluate the coefficient distributions of the system under normal and challenging weather conditions. The results show, that the quantized disparity coefficients in frequency space have consistently lower entropy compared to the coefficients of the video scenes. Therefore, it is advantageous for the system to compress the disparity instead of one of the two video streams. Introduction Motivation Driver assistance systems depend on a variety of sensors, interconnected with electronic control units (ECUs ). In order to get a settled and agreed interface definition, the International Organization for Standardization (ISO) initiated the standardization process of the video communication interface for cameras in road vehicles low-voltage differential signaling Figure 1 Stereo Vision System: The system captures the scene with two cameras, computes the disparity and encodes the left view and the disparity for transmission to the ECU. With the disparity information an automotive function can calculate the distance Z to an obstacle. We already examined the peak signal to noise ratio of the left video and the mean disparity error of the system under different rate allocations between the video and disparity streams (see Related Work In [5] the distribution of DCT-coefficients in the field of image compression is examined and an approximation of the AC-coefficients with Laplace distributions is proposed. The work o

Testen und Testzellen (MEDEA T615). Teilvorhaben: Testzelle fuer die Integrierte Pruefung und Handhabung von Halbleiterbauelementen Schlussbericht

SIGLEAvailable from TIB Hannover: DtF QN1(90,34) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Ladungsmesser

Available from TIB Hannover: RN 2351(12) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Laser-Doppler-Anemometer fuer Stroemungsmessungen

Copy held by FIZ Karlsruhe / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Steuerung einer Verschiebevorrichtung mit einem Kompakt-PC

SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Technologien und Anwendungen planarer optischer Elemente-FOTA. Teilvorhaben: Halbleiterlaseranwendung Sachabschlussbericht

SIGLEAvailable from TIB Hannover: DtF QN1(55,24) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman