Journal ArticleDOI
A bit-rate reduction for MUSE signal
M. Nishino,C. Yamamitsu +1 more
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TLDR
A novel bit-rate reduction method developed for the MUSE (multiple subNyquist sampling encoding) signal is discussed, using an orthogonal transformation by which the Muse data-rate is reduced from 1/2 to 1/3 of the original, maintaining a picture quality acceptable for the home-use digital VTR of a HDTV (high-definition television) system.Abstract:
A novel bit-rate reduction method developed for the MUSE (multiple subNyquist sampling encoding) signal is discussed. This method uses an orthogonal transformation by which the MUSE data-rate is reduced from 1/2 to 1/3 of the original, maintaining a picture quality acceptable for the home-use digital VTR of a HDTV (high-definition television) system. By simultaneous application of two-dimensional DCT (discrete cosine transform) and nonlinear quantization methods for a quincuncial pixel arrangement formed within a field, an optimum data assignment between DCT coefficients and nonlinear quantization values is accomplished by using a variable length coding method. >read more
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Patent
Apparatus and methods for transmitting compressed digital image signals
TL;DR: In this article, variable length encoded portions are arranged in a plurality of sync blocks having a predetermined data length such that each portion is contained entirely within a respective number ofsync blocks and the sync blocks are transmitted via a transmission medium.
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Journal ArticleDOI
An experimental study for a home-use digital VTR
Chojuro Yamamitsu,Akifumi Ide,Akira Iketani,Tatsuro Juri,S. Kadono,Chiyoko Matsumi,K. Matsushita,H. Mizuki +7 more
TL;DR: A modified DCT (discrete cosine transform) has been developed for this system that needs only one-half the number of multipliers of a conventional DCT, making the hardware scale smaller.