Digital data insertion apparatus and methods for use with compressed audio/video data
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United States of America Patent
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Feb 20, 2018
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app pub date -
Aug 10, 2015
filing date -
Oct 23, 2002
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Abstract
Methods and apparatus for inserting data a compressed data bitstream are disclosed. An example method includes inserting audience measurement data in a compressed bitstream by eliminating a first type of data within the compressed data bitstream, packing a second type of data to occupy a location within the compressed data bitstream from which the first type of data is eliminated, and inserting the audience measurement data in a predetermined location within the compressed data bitstream that is expanded as a result of the packing of the second type of data to form a modified compressed data bitstream. The example method also includes generating the ratings information based on the modified compressed data bitstream.
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