### Abstract

In a television transmission system for digital picture signals each picture is divided into sub-pictures of N x N picture elements for the purpose of limiting the bit rate. Each sub-picture is subjected to a two-dimensional forward transform to determine coefficients. These coefficients are converted into a series of serially occurring coefficients in which the AC coefficients in this series are arranged in such a way that the magnitude variation of these AC coefficients in the series is monotonous. The magnitudes of the AC coefficients thus arranged are subjected to a differential encoding so that the difference between the magnitudes of two successive AC coefficients is transmitted instead of the magnitude of the AC coefficients themselves.

Original language | English |
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Patent number | EP0341780 |

Publication status | Published - 30 May 1988 |

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## Cite this

With, de, P. H. N. (1988). Television transmission system with differential encoding of transform coefficients. (Patent No.

*EP0341780*).