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Frequency scanning in digital coding for HDTV broadcasting

: Schamel, G.; Li, H.

Ohta, N. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.; European Optical Society -EOS-:
High-definition video : 5 - 6 April 1993, Berlin, FRG, held as part of the International Symposium on Video Communications and Fiber Optic Networks
Bellingham/Wash.: SPIE, 1993 (SPIE Proceedings Series 1976)
ISBN: 0-8194-1222-8
Conference on High Definition Video <1993, Berlin>
International Symposium on Video Communications and Fiber Optic Networks <1993, Berlin>
Conference Paper
Fraunhofer HHI ()
code standards; discrete cosine transforms; entropy; high definition television; image coding; television broadcasting; modified universal variable length coding; digital coding; HDTV broadcasting; algorithm; frequency scanning; dct coefficients; motion picture experts group; entropy coding; test model; mpeg; muvlc; coding efficiency; flexibility

This paper describes an algorithm for frequency scanning of DCT coefficients which has been submitted to MPEG (Motion Picture Experts Group) in contrast to the well-known block scanning technique. With respect to coding of the scanned coefficients, an entropy coding method, Modified Universal Variable Length Coding (MUVLC), is employed. In the test model (TM) system of MPEG the coding efficiency of MUVLC and the MPEG VLC was compared. The results showed that the MUVLC technique gives higher coding efficiency and more flexibility in a broadcast environment.