• DocumentCode
    744924
  • Title

    Entropy Measurements for Three Adaptive Source Encoders

  • Author

    Adams, William C., Jr.

  • Author_Institution
    Harris Corp., Melbourne, FL, USA
  • Volume
    24
  • Issue
    1
  • fYear
    1976
  • fDate
    1/1/1976 12:00:00 AM
  • Firstpage
    131
  • Lastpage
    133
  • Abstract
    The entropy of the output of three adaptive source encoders, AΔM, APCM, and ADPCM, is measured for speech inputs at low sampling rates. It is attempted to correlate the source encoder output entropies, normalized to the channel bit rate, with the results of informal listening tests. It was hypothesized that the channel bit rate utilization factor would predict subjective ranking of the source encoders. The results of measurements do not support this hypothesis; an intuitive explanation is offered.
  • Keywords
    Adaptive coding; DPCM communication; Delta modulation communication; PCM communication; Speech coding; Active appearance model; Bandwidth; Bit rate; Delta modulation; Entropy; Pulse modulation; Quantization; Sampling methods; Speech; Testing;
  • fLanguage
    English
  • Journal_Title
    Communications, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0090-6778
  • Type

    jour

  • DOI
    10.1109/TCOM.1976.1093184
  • Filename
    1093184
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=744924