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Communication jack nose cleaning tool

  • US 5,543,843 A
  • Filed: 04/19/1993
  • Issued: 08/06/1996
  • Est. Priority Date: 07/19/1991
  • Status: Expired due to Fees
First Claim
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1. In a method of compressing a motion picture signal divided into a plurality of blocks of digital picture data representing respective pixels, and in which each of said blocks of digital picture data is selectively compressed by a discrete cosine transform (DCT) coding method or by an intra-block predictive coding method which effects non-transform coding (NTC), said intra-block predictive coding method comprising the steps of:

  • calculating a mean value of said picture data in at least one flat region within each block;

    determining a representation value of each said block on the basis of said mean value thereof;

    determining differences between said representation value for each block and values of said picture data representing the pixels within said block so as to generate difference values;

    quantizing said difference values with a selected quantizing width so as to generate quantization coefficients;

    variable length coding said quantization coefficients, said representation value and information representing said quantizing width;

    adaptive scanning said quantization coefficients in accordance with a distribution status of said quantization coefficients within each block so as to convert said quantization coefficients into one-dimensional information;

    coding information indicating a scanning sequence of said adaptive scanning;

    selectively executing a differential processing of said one-dimensional information; and

    coding switching information indicating whether or not said differential processing has been executed.

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