Television system for transmitting pictures in a digital form

Details Television system for transmitting pictures in a digital form Television system for transmitting pictures in a digital form

1995-05-01

1999-10-19

Nguyen, Huy T.

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386111, H04N 592

Patent

active

059702079

ABSTRACT:
To be able to transmit television pictures in a digital form through a medium having a limited bandwidth, the pictures are subjected to picture transform and to variable-length coding. The picture to be transmitted is converted in this manner into a bit stream comprising code words of variable length. This bit stream is converted into a channel bit stream which is less sensitive to transmission errors. To this end the most significant code words (representing the average luminance and the coarse picture details) of sub-pictures of 8*8 pixels are accommodated at fixed bit positions of the channel bit stream. These code words can be retrieved by simple count-down of the bit positions. The other code words are distributed over the other bit positions. The decoder is relatively simple because the length of each block comprising significant code words is also transmitted. This length is preferably adapted to the extent of picture detail in the sub-picture.

REFERENCES:
patent: 5023710 (1991-06-01), Kondo et al.
patent: 5148271 (1992-09-01), Kato et al.
patent: 5175531 (1992-12-01), Juni et al.
patent: 5444490 (1995-08-01), De With et al.

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