Method and apparatus for modifying encoded digital video for imp

Details Method and apparatus for modifying encoded digital video for imp Method and apparatus for modifying encoded digital video for imp

1995-11-21

1999-09-21

Kostak, Victor R.

Television

Bandwidth reduction system

Plural video programs in single channel

370477, 348387, H04N 712

Patent

active

059560886

ABSTRACT:
A method for increasing channel utilization for a data channel transmitting a multiplex of a set of one or more encoded program streams, each program stream in being decodeable by a corresponding decoder, each corresponding decoder including a corresponding decoder buffer, the decoder buffers having a maximum allowable size, the method comprising selecting encoded pictures to be modified, said selecting according to a criterion which includes preventing any underflow of any decoder buffer, modifying each said selected encoded picture to form a corresponding modified encoded picture, said modified encoded picture having less data than said selected encoded picture, and transmitting the corresponding modified encoded pictures through the channel in place of the selected encoded pictures.

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